|| List of recent Polyurethane-related patents
| Masked polyisocyanate and uses thereof|
The invention relates to polyurethane resin compositions and, in particular, stable, ready-to-use polyurethane resin compositions comprising: a masked polyisocyanate having formula (i), wherein b represents alkyl and a represents a group comprising a number of isocyanate functions of between 1.5 and 2.2, preferably between 1.5 and 2.1 and, more preferably, between 1.5 and 2; or a masked pre-polymer that is the product of a reaction between the above-mentioned masked polyisocyanate and a polyol having between 1.5 and 3 oh functions and a molecular mass of between 900 and 3,000 g/mol, in a ratio such that the number of nco functions of the masked polyisocyanate in relation to the number of oh functions of the polyol is between 1.5 and 2.5 approximately; or a mixture of the aforementioned masked polyisocyanate and masked pre-polymer. The invention also relates to the use of the masked polyisocyanate in order to form a masked pre-polymer by reacting said masked polyisocyanate on a polyol, and to the use of a masked polyisocyanate and/or a masked pre-polymer in polyurethane resin compositions..
| Surface protective film|
Provided is a surface protective film including, as an outermost layer, a pressure-sensitive adhesive layer containing a urethane-based pressure-sensitive adhesive as a main component, the surface protective film allowing the contamination of an adherend to be extremely suppressed, and being preferably excellent in wettability and reworkability. The surface protective film of the present invention includes, as an outermost layer, a pressure-sensitive adhesive layer containing, as a main component, a urethane-based pressure-sensitive adhesive containing a polyurethane-based resin; and when a pressure-sensitive adhesive layer side of the surface protective film is attached to a glass plate at 50° c.
| Belt having a tension member, in particular a carbon tension member, which is prepared with a cross-linked polyurethane, and preparation method|
A belt comprises at least a belt body made of a polymer material having elastic properties, the belt including a cover layer as a belt backing, a substructure having a force-transmission zone, and a tension member in a ribbed design embedded in the belt body. The tension member is prepared with a cross-linked polyurethane in such a way that the polyurethane fills at least part of the tension member cavities.
| Polishing pad and method for producing same|
Provided are: a polishing pad which is capable of alleviating a scratch problem that occurs when a conventional hard (dry) polishing pad is used, and which is excellent in polishing rate and polishing uniformity and is usable not only for primary polishing but also for finish polishing; and a method for producing the polishing pad. The polishing pad is for polishing a semiconductor device and includes a polishing layer having a polyurethane-polyurea resin molded body containing cells of a substantially spherical shape.
| Decorative board|
A decorative board 5 includes: a prepreg 2 that includes a binder component including: at least one thermoplastic resin selected from a group consisting of acrylic resin having a glass-transition temperature tg exceeding 0° c., vinyl chloride resin having a glass-transition temperature tg exceeding 0° c., acrylic urethane, and aqueous polyurethane resin, and a thermosetting resin, a mixing ratio of the at least one thermoplastic resin to the thermosetting resin being 1:0-0.5 in solid content ratio, and an endothermic metal hydroxide; and a thermosetting resin impregnated decorative paper 1, wherein the prepreg and the thermosetting resin impregnated decorative paper are stacked and integrated.. .
| Textile fabric sheet having stain and liquid resistance and the preparation method thereof|
Provided are a textile fabric sheet having stain and liquid resistance including a fabric sheet, a polyurethane coating layer formed on the fabric sheet and a silicon coating layer formed on the polyurethane coating layer and a method of preparing the same. Thus, a texture characteristic of the fabric substrate itself can be exhibited, and due to the polyurethane coating layer and the silicon coating layer stacked in two steps, excellent water resistance, stain resistance and air permeability can be exhibited..
| Polymer, compositions and process for preparing them|
There is described a process for preparing an silane-functional oligomer (such as an alkoxysilane polyurethane) suitable for use as a crosslinkable coating component, the process comprising the steps of: 1) reacting an aminoalkyl silane with a cyclic carbonate, lactone or lactam to form a hydroxyl (oh) or imino (nh) functional silane intermediate, 2) reacting the silane intermediate from step 1) (optionally immediately without isolation) with a diisocyanate (dinco) to form a silane functional polyurethane; where in step 2) the molar ratio of the total amount oh or nh groups on the silane intermediate of step 1) to the diisocyanate is from 1.8 to 2.2 (preferably about 2.0) and the resultant silane polymer is substantially-free of isocyanate groups thereon.. .
| Insulating glass sealant|
A two-part sealant composition, wherein this composition comprises a first part and a second part. The first part comprises a polymer selected from a silane-terminated polyurethane or a silane-terminated polyether, wherein this polymer is present in an amount of up to 100% by weight of the first part of the sealant composition.
| Environmentally-friendly polyurethane matting and the method of production thereof|
The present invention discloses an environmentally-friendly polyurethane matting and a method of production thereof. The environmentally-friendly polyurethane matting comprises a leather surface, a polyurethane middle layer and an anti-slip leather bottom layer.
| Moisture-curable polyurethane hot-melt resin composition, adhesive, and article|
It is an object of the present invention to provide a moisture-curable polyurethane hot-melt resin composition having excellent waterproof properties, drop impact resistance, and flexibility. The present invention provides a moisture-curable polyurethane hot-melt resin composition containing a urethane prepolymer having an isocyanate group, the urethane prepolymer being produced through a reaction of a polyol (a) with a polyisocyanate (b), wherein the polyol (a) contains a polyether polyol (a-1), a crystalline polyester polyol (a-2), an amorphous polyester polyol (a-3), and an acrylic polyol (a-4).
| Hybrid polymer coating for petrous or ceramic substrates, petrous or ceramic substrate, and obtaining method|
A coating having a thickness between 0.1 and 2 mm is obtained from a mixture with the following composition: 10-25% by weight of micronized powder; 40-60% by weight of inorganic gravels of petrographic origin of sizes between 0.063-2 mm; 10-40% by weight of a polymerisable base resin selected from polyurethane, polyester, epoxy or acrylic, with additives, and optionally pigments. The proportion of the mentioned gravel and micronized powder of the coating being up to 90% in an inner most area of interphase between coating and surface of the petrous substrate, covering one third of the thickness of the coating.
| Reversible camouflage material|
A reversible camouflage material including a textile layer having a woodland camouflage print thereon, an infrared suppressing layer, and a textile layer having a desert camouflage print thereon is provided. The infrared suppressing layer may include a polyurethane layer sandwiched between a carbon-containing eptfe layer and an eptfe layer.
| Insulation moulding and method for its manufacture|
A cavity between inner and outer walls of an open-box-shaped mould is filled with a polyurethane reaction mixture, containing an isocyanate and an emulsion of an isocyanate-reactive composition with three polyols and a blowing agent, which is cured to a polyurethane containing polymer. The inner and outer wall are a fixed distance from one another and each wall comprises a bottom and sides.
| Polyurethane prepolymer prepared by functional polyurethane prepolymer and application thereof|
A method of preparing polyurethane prepolymer does not require using a toxic isocyanate monomer (manufactured by harmful phosgene) as a raw material. Epoxy resin and carbon dioxide are used as major raw materials to form cyclic carbonates to be reacted with a functional group oligomer, and then amino groups in a hydrophilic (ether group) or hydrophobic (siloxane group) diamine polymer are used for performing a ring-opening polymerization, and the microwave irradiation is used in the ring-opening polymerization to efficiently synthesize the amino-terminated pu prepolymer, and then an acrylic group at an end is added to manufacture an uv cross-linking pu (uv-pu) oligomer which can be coated onto a fabric surface, and the fabric is dried by uv radiation for a surface treatment to form a washing-resisted long lasting hydrophilic or hydrophobic pu fabric..
| Method of undercoating a suspension and undercarriage area|
A method of coating an undercarriage of a cargo carrying vehicle, the method comprising the steps of applying primer to at least a portion of the suspension or the undercarriage, wherein the primer is either epoxy, alkyd or modified alkyd, and applying polyurea/polyurethane blend to at least a portion of the primer.. .
| Expansion joint comprising a hybrid polyurea-polyurethane header composition|
Provided is a header composition for an expansion joint system. The header composition includes a hybrid polyurea-polyurethane composition and is designed to have a short cure time at low temperatures.
| Process for the production of polyurethane composite components|
A composite and process for the production of a composite component, comprising a) a support of a thermoplastic composition, and b) at least one polyurethane layer in direct contact with the support.. .
| Passive solar tracking system to enhance solar cell output|
A passive solar tracking system to enhance solar cell output is provided. The passive solar tracking system includes a panel having at least one solar cell for solar-to-electric conversion and an actuator that is arranged for moving the panel to provide the variable facing direction of the panel.
|Method for removing radioactive cesium, hydrophilic resin composition for removal of radioactive cesium, method for removing radioactive iodine and radioactive cesium, and hydrophilic resin composition for removal of radioactive iodine and radioactive cesium|
A method for removing radioactive cesium and/or iodine from a radioactive substance in liquid and/or a solid matter using a hydrophilic resin composition comprising a hydrophilic resin and a metal ferrocyanide compound, wherein the hydrophilic resin includes at least one hydrophilic resin selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin each having at least a hydrophilic segment, and a metal ferrocyanide compound is dispersed in the hydrophilic resin composition in a ratio of at least 1 to 200 mass parts relative to 100 mass parts of the hydrophilic resin.. .
|Novel diamine compound|
The present invention provides a novel diamine compound represented by formula (1) below. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example.
|Method for producing cyclic carbonates|
Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkyl carbonates or diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts.
|Preparation of polyurethanes and polyesters from glycolipid type compounds|
For preparing polyurethanes and polyesters.. .
|Polyurethane aqueous dispersion, formed film obtained from same, and glove|
Provided is a polyurethane aqueous dispersion characterized in having practical utility in terms of processing suitability when a formed film is produced by salt coagulation method, and characterized in that a formed film obtained from the same has practical utility in terms of resistance against ethanol water. A polyurethane aqueous dispersion for a formed film, the formed film being obtained by using the polyurethane aqueous dispersion and a coagulant liquid in combination, is obtained by: neutralizing an isocyanate group-terminated prepolymer obtained by reaction of a polyisocyanate (a) composed of diphenylmethane diisocyanate and alicyclic diisocyanate, a random copolymer (b) of ethylene oxide and tetrahydrofuran, a polyol (c) having a number average molecular weight of 1000 to 5000, a polyhydric alcohol-based chain extender (d) having a number average molecular weight of 400 or less, and a diol compound (e) having a carboxyl group; and dispersing the obtained neutralized substance in water, and thereafter causing a chain extension reaction using an amine-based chain extender (f)..
|Protein-containing foams, manufacture and use thereof|
The invention relates generally to protein-containing polyurethane foams, methods and compositions for making the polyurethane foams, and articles comprising the polyurethane foams.. .
|Process for producing a rigid polyurethane-isocyanurate foam|
The invention provides a process for producing rigid polyurethane-polyisocyanurate foams using polyols having a high proportion of secondary hydroxyl end groups. The invention further relates to the rigid polyurethane-polyisocyanurate foams thus obtainable and to the use thereof in the production of composite elements from rigid polyurethane-polyisocyanurate foams and suitable outer layers.
|Fast-setting alkoxysilane spray foams|
The present invention relates to an isocyanate-free multi-component system, in particular for medical uses such as foamable wound coverings, with at least two separate components, wherein the first component comprises at least one alkoxysilane-terminated prepolymer and the second component comprises an aqueous component, wherein the aqueous component is a polyurethane dispersion.. .
|Internal mold release agents for polyurethane materials|
An internal mold release agent (imra) which effectively releases a cured polyurethane (pu) material from a metal, in particular steel, mold. The imra is a surface active agent containing phosphorus or a combination (blend or reaction product) of the agent with other chemicals.
|Reactive cell opener composition, polyol composition, and open-celled polyurethane foam|
The present invention relates to a reactive cell opener composition that includes a base oil, and a metal salt of a fatty acid having a hydroxyl group coupled to an isocyanate group. The invention also relates to a polyol composition that includes a polyol, a foam stabilizer, and a cell opener mixed with each other.
|Binder for battery, and anode and lithium battery including the same|
A binder for a battery including polyurethane particles and a binder polymer is disclosed. Additionally, a binder composition, and an anode and a lithium battery which include the binder are also disclosed..
|Pneumatic stamping press with high velocity slide and punch|
A pneumatic press with high slide acceleration and velocity is equipped with an arrangement trigger mechanism for holding the slide, upper die, and punch in place until air pressure force in tons is exerted against slide opposite the upper die and punch. When the trigger mechanism releases the slide, upper die, and punch in a short travel the velocity is very high.
|Migration-free, halogen-free, flame retardant thermoplastic polyurethane compositions|
Halogen-free, thermoplastic polyurethane-based compositions having good mechanical and flame-retardant properties are provided. The compositions include flame-retardant aromatic organic phosphate compounds that do not exhibit migration in molded products, such as cable and wire jacketing and insulation.
|Fiber sizing agent composition|
A fiber sizing agent is described, which is capable of imparting sufficient sizing properties and fiber spreading properties to reinforced fiber bundles for producing fiber-reinforced composite materials. A fiber sizing agent composition (e) includes a sizing agent (a) having a viscosity of 50 to 3,000 pa·s at 35° c., and has a thixotropic index of 3 to 15.
|Aqueous surface-treating agent|
(where r1 and r2 each are an alkyl group having 1 to 4 carbon atoms, and n and m are 1≦n≦3 and m=3−n, respectively), and/or a hydrolyzate thereof; wherein 100 parts by weight or more of the polyurethane resin in terms of the weight of solid matters is used on the basis of 100 parts by weight in terms of nonvolatile matters of silicone oil, can prevent sticking of rubber seal materials such as o rings, etc. Themselves or sticking to a metal, a resin, etc., and can reduce the friction of rubber or resin seal members at the time of sliding motion..
|Halogen-free polymer blend|
The invention concerns a halogen-free polymeric blend capable of ionic conductivity comprising either one or more polyether-based polymers or copolymers that have favorable structures to facilitate polymer chain segmental motion and ion hopping environment, selected from the group of polyether-block-polymers and polyether-based polyurethanes, or said polyether based polymers or copolymers together with one or more ionomers formed by neutralization of ethylene acid co-polymers, as well as one or more specific halogen-free ionic complexes or salts comprising a weakly coordinating anion and a cation of an alkali metal or alkaline earth metal. Further, the invention concerns the use of said blend and a plastic material containing said blend as an additive..
|Layered structures and articles prepared therefrom|
The invention provides a layered structure comprising at least two layers: a) a first layer a formed from a composition a comprising a polyurethane; b) a second layer b formed from a composition b comprising at least one compound selected from the group consisting of the following compounds: a) a compound 1 comprising at least one acid group, b) a compound 2 comprising at least one anhydride group, c) a compound 3 comprising at least one primary amine group and/or at least one secondary amine group, and d) a combination thereof; and wherein the compound has a molecular weight or number average molecular weight, each less than 10,000 g/mole.. .
|Carbon fiber sizing agent, carbon fiber strand, and fiber-reinforced composite|
A carbon fiber sizing agent imparts good bonding performance to carbon fiber, is used to reinforce a thermoplastic matrix resin, and provides a carbon fiber strand applied with the sizing agent and a fiber-reinforced composite reinforced with the carbon fiber strand. The sizing agent for carbon fiber is used to reinforce thermoplastic matrix resin.
|Bead foam compression molding method with in situ steam generation for low density product|
Disclosed is a method for molding a foamed article, such as a midsole or outsole for footwear, in which first water, then a desired amount of thermoplastic polyurethane foam beads are placed in a compression mold in the shape of the article and the mold is brought to a peak temperature of from about 130° c. To about 180° c.
|Process for producing composite elements|
The invention relates to an improved process for producing composite elements comprising at least one outer layer and at least one isocyanate-based rigid foam layer by means of a fixed applicator apparatus and in which the flowable starting material comprises the following components: a) at least one polyisocyanate, b) at least one compound which reacts with isocyanate groups to form urethane, c) at least one blowing agent, d) catalysts comprising at least one compound d1) which catalyzes isocyanurate formation and at least one compound d2) which catalyzes polyurethane formation, comprising at least one amino group, and e) optionally auxiliaries and additives, where the manner of use of component a) and of component b) is such that the isocyanate index is at least 180, and where the ratio by weight of the compound d2) to the compound d1) is from 0.75 to 8.. .
|Folding, lightweight, hygienic, heavy-duty food shipping container|
A reusable, sanitary and folding container includes a base, two folding sidewalls, two folding end walls and latches and hinges. The base includes slots that receive the hinge pins that allow the sidewalls and end walls to fold up and down.
|Polyurethane, composition for formation of polishing layers that contains same, pad for chemical mechanical polishing, and chemical mechanical polishing method using same|
Ho—(cr3r4)2n—oh (2). .
A waterproof safety boot includes a one-piece eva upper (11) to which is applied a toe cap (15). A polyurethane toe cap cover (19) is secured to the upper to encapsulate the toe cap.
|Shoe having an inflatable bladder|
An article of footwear including a sole and an upper with an exterior and interior surface, and one or more bladders which comprises at least one of the exterior or interior surfaces of the upper. The bladder comprising sheets of polyurethane or polyester film attached together to form an airtight seal.
|Polyglycerol based polyols and polyurethanes and methods for producing polyols and polyurethanes|
A new class of polyols derived from renewable resources, including polyglycerol and vegetable oils, the use of such polyols in polyurethane foams and cast resins, and methods for making the polyols and polyurethanes are provided.. .
|Polyurethanes made using mixtures of tertiary amine compounds and lewis acids as catalysts|
Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a tertiary amine catalyst having a molecular weight of up to 300 and from 0.01 to 1.0 mole per mole of the tertiary amine compound(s) of a non-protic, non-catalytic, metal-containing lewis acid.. .
The present invention provides water swellable one-component sealants prepared by incorporation of polyols containing ethylene oxide (“eo”) into the backbone of the polymer. The inventive one-component hydrophilic polyurethane sealant contains a silane-terminated polyurethane prepolymer, a compound having an ethylene oxide content of at least about 40 wt.
|Composition for use in the manufacture of polyurethane systems|
The invention relates to a composition for producing a polyurethane system, especially a polyurethane foam. The composition comprising one or more compounds comprising at least one 5- or 6-membered ring comprising one or two oxygen atoms and carbon atoms the present invention also relates to a process for producing polyurethane systems by using this composition as well as polyurethane systems obtained from such a process.
|Controlled release copper sulfate for phytoplankton control|
A controlled release copper sulfate algaecide for controlling phytoplankton growth, including blue green algae is described. The controlled release algaecide includes a copper sulfate granule coated with at least one layer including a polyurethane which is a reaction product of a polymeric diisocyanate and a polyol..
|Stretchable ink composition|
A stretchable ink composition comprising a polyester; a polyurethane elastomer; water; a co-solvent; an optional surfactant; and an optional colorant.. .
|Embossed carpet backing|
Disclosed is a floor covering having an embossed polyurethane foam backing layer and methods of making and using same. A bottom surface of the backing layer can be thermo-embossed with a predetermined pattern, and the bottom surface of the backing layer can define at least one fluid pathway in communication with a side edge of the floor covering.
|Breathable insulation for corrosion reduction|
Apparatuses for insulation and a method for insulating a pipeline are disclosed. An insulation layer may include a flexible polyurethane foam.
|Articles prepared using recycled materials and methods of preparation thereof|
The present invention is directed to articles of manufacture having at least a portion prepared using recycled material, including but not limited recycled rubber or other polymeric materials. The articles may incorporate the recycled materials in a granulated form.
|Replaceable handle and support/base ring elements for a pressurized container and pressurized container|
The present invention refers to replaceable upper or handle (2) and lower or support/base ring (4) elements for a pressurized container having an upper portion and a lower portion, wherein said upper and lower rings elements are manufactured from a thermostable material, a thermosetting material or a combination thereof, e.g. Polyurethane, and comprise fastening means to releasably engage the ring elements with projections (3, 5) provided on the upper and lower portions of said pressurized container.
|Pneumatic tire carcass having air blocking stabilizing fabric system|
A pneumatic tire carcass having a radial direction and a circumferential direction. The tire carcass comprises at least one ply of stabilizing fabric embedded into an air-blocking layer.
|Process for producing a coated fertilizer comprising boron|
A process for producing polyurethane coated fertilizer granules having core granules comprising at least 0.2 wt % of boron, the process having the step of applying a polyol and an isocyanate to the core granules, wherein an acidic component is applied to the core granules no later than the polyol.. .
|Artificial leather with improved flexing endurance properties|
The present invention relates to a process for production of artificial leather comprising top coat, polyurethane layer and optional substrate layer, said process comprising i) providing a release layer, ii) applying one or more than one layer of a top coat to the release layer to an overall top coat layer thickness in the range from 1 to 500 μm, iii) applying first polyurethane system components comprising an isocyanate component (a) and a polyol component (b) to the top coat to form a first polyurethane layer, wherein the isocyanate index of the first polyurethane system components is in the range from 101 to 140, iv) optionally applying further polyurethane system components to the first polyurethane layer to form further polyurethane layers, v) optionally applying a substrate layer to the polyurethane system components, vi) curing the polyurethane system components to form a polyurethane layer, and vii) separating the release layer from the top coat, wherein the overall thickness of the first and optionally further polyurethane layers is in the range from 0.01 to 20 mm and the polyurethane system components are solvent-free. The present invention further relates to an artificial leather obtainable by such a process and to the use of the artificial leather as upper materials for footwear..
|Multi-layered anatomical quilted system|
The invention relates to a multi-layer anatomical padding system which is developed based on the need of the human being for feeling comfort when performing the action of sitting, sleeping or support; the multi-layer anatomical padding system is composed of polymeric gel, visco-elastic polyurethane foam, flexible polyurethane foam in 2 different densities, wherein the polymeric gel is located in the lower part of the system followed by a visco-elastic polyurethane foam, followed by a flexible polyurethane foam, and finally another flexible polyurethane foam insert so, where the latter foam goes exclusively on the seats and will only help to reduce the pressure in the groin area through this insert having a conical elongated shape with rounded ends, which is located in the central part of the flexible polyurethane foam which has in turn the same basin form, that said insert fits into it, in which the layer of flexible polyurethane foam and the insert equal half the padding, and the polyurethane foam with visco-elastic polymer gel occupy approximately the other half.. .
Articles of apparel and a method for manufacturing an article of apparel are disclosed. An insulation layer for an article of apparel may include a flexible polyurethane foam.
|Low free mdi prepolymers for rotational casting|
Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4′-diisocyanato diphenylmethane (mdi), and which prepolymer comprises less than 1.0% by weight of free mdi monomer, based on the toal weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free mdi monomer.. .
|Hybrid acrylic polyurethane pre-polymer and sealant thereon|
Pre-polymer materials suitable for the preparation of superior sealants are provided along with silylated (silane terminated) hybrid acrylic polyurethane pre-polymers, and the preparation thereof, and sealants comprising the pre-polymers, and the preparation of the sealants are also provided. A silylated acrylic polyurethane hybrid pre-polymer of acrylic pre-polymer, and polyurethane including acrylic pre-polymer and a second component, which may be a silylated polyurethane (spur) or may be a mixture of an isocyanate, a polyol, and a silane is also provided.
|Absorbable multi-putty bone cements and hemostatic compositions and methods of use|
The present invention relates to absorbable polyurethane compositions suitable for use in bone repair or reconstruction. The present invention relates to the field of polyurethane-based cements, and putties for use in bone hemostasis, repair and reconstruction.
|Hybrid polyester-polyether polyols for improved demold expansion in polyurethane rigid foams|
The present invention discloses polyester-polyether polyols suitable for blending with other polyols or other materials mutually compatible with the polyester polyols to achieve polyurethane and polyisocyanurate products. In particular the present invention discloses polyester-polyether polyols produced by the reaction of: 1) phthalic anhydride with an alcohol having a nominal functionality of 3 and a molecular weight of 90 to 500 under conditions to form a phthalic anhydride half-ester; and 2) alkoxylating the half-ester formed in step 1 to form a polyester-polyether polyol having a hydroxyl number of from 200 to 350; with the proviso when the alcohol is a polyether polyol, the polyether polyol contains at least 70 weight percent of polyoxypropylene..
|Hydrophilic interpenetrating polymer networks derived from hydrophobic polymers|
A composition having a hydrogel bearing side of a biostable polymer network, wherein the biostable polymer network comprises a first gradient of the biostable polymer, which biostable polymer network decreases in concentration from the hydrogel bearing side to a bone interface surface; and a second gradient of a biostable polyurethane network, which polyurethane network increases in concentration from the hydrogel bearing side to the bone interface surface, the bone interface surface useful for an orthopedic implant.. .