The present invention provides a resin for thermoplastic polyurethane (TPU) yarn using nanosilica and a method for manufacturing the same, where nanosilica having a particle size of 100 nm or less is added as a thickening agent for improving productivity in the production of and glossiness of TPU yarns, such as mono-filament TPU yarns having a denier count of 50 to 350 or multi-filament TPU yarns having a denier count of 50 or less without applying a coating of TPU to the surface of polyester or nylon yarns, thereby securing desired workability and properties and realizing continuous drawing of TPU yarns without thread breakage. The content of nanosilica from 0.3 to 7 phr in TPU resin is optimal for productivity of mono- or multi-filament yarns, whereas the content of nanosilica from 0.5 to 1.5 phr is optimum for both productivity and cost reduction.

A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I) containing ≥90 mol % in total of an aliphatic and/or alicyclic isocyanate compound having two isocyanate groups, an aliphatic alcohol (II) having only a hydroxyl group as a functional group, and a polyol (III). The equivalent ratio of EIII:EI:EII is 1:2-6:1-5 with the proviso that 0.95≤(EI)/((EII)+(EIII))≤1.05, where EIII, EI, EII represent the hydroxyl equivalent, isocyanate equivalent, and hydroxyl equivalent of the polyol (III), isocyanate compound (I), and aliphatic alcohol (II), respectively. The aliphatic alcohol (II) has a Mn, which is a number average molecular weight determined from the hydroxyl value, of <300 and contains ≥90 mol % of a C12 or lower aliphatic diol. The polyol (III) has a Mn of 300-10,000 and contains ≥80 mol % of a copolymerized polycarbonate diol (IIIA) having a Mn of 500-5,000 and including repeating units (A) and (B) shown below:

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Methods, compositions, and kits for adhering polymers and other materials to another material, and in particular to bone or bone-like structures or surfaces. A composition of matter includes a urethane dimethacrylate-methyl methacrylate copolymer with a plurality of first polymer regions based on urethane dimethacrylate and a plurality of second polymer regions based on methyl methacrylate. The method includes placing an orthopedic joint implant having an attachment surface in a joint space, applying a first non-urethane-containing precursor, a second urethane-containing precursor, and a initiator to the attachment surface; contacting the first and second precursors and the initiator with the joint surface; and copolymerizing the first and second precursors and forming an adhesive copolymer and attaching the implant to the joint.

The invention relates to polyurethanes obtainable by reaction of (a) polyisocyanates A selected from modified or unmodified 4,4′-methanediphenyl diisocyanate, higher nuclear homologs of 4,4′-methanediphenyl diisocyanate, isocyanated groups containing prepolymers based on 4,4′-methanediphenyl diisocyanate, and mixtures thereof, with (b) compounds having at least two isocyanate-reactive hydrogen atoms, comprising (b1) block copolymers formed from a polybutadienol and a cyclic ester as component B1, and (b2) low molecular weight extenders or crosslinkers each having a molecular weight of 62 to 500 g/mol as component B2.

A catheter can include an extruded shaft that includes a lumen extending from a proximal end to a distal end and a sidewall that defines at least a portion of the lumen, the sidewall includes a siliconized polycarbonate polyurethane of a specified formulation. Due to the formulation, the sidewall can be alcohol resistant, which can, in some instances, permit alcohol locking of the catheter.

The present invention relates to a composition for forming an environmentally friendly polyurethane foam, the composition having improved storage stability, air permeability, and anti-oxidation characteristics and to a method for manufacturing a polyurethane foam and, more specifically, to an isocyanate pre-polymer prepared by reaction of a polyisocyanate and a polyol component comprising a bio-polyol, to a composition for forming an environmentally friendly polyurethane foam, the composition having improved storage stability, air permeability, and anti-oxidative characteristics by comprising the pre-polymer as one component, to a method for manufacturing a polyurethane foam using the same, and to an environmentally friendly polyurethane foam manufactured thereby.

A process comprising, consisting of, or consisting essentially of: forming a reaction mixture containing at least one polyisocyanate and an isocyanate-reactive compound comprising at least one alkoxylated triazine-arylhydroxy-aldehyde condensate composition wherein the alkoxylated triazine-arylhydroxy-aldehyde condensate composition is a reaction product of a triazine-arylhydroxy-aldehyde condensate and at least one alkylene carbonate, is disclosed.

Provided is a polyurethane gel composition containing A and B below. Here, A represents a polyurethane obtained by reaction of (a) a hydrogenated polybutadiene having isocyanate groups at the terminals and (b) a glycol represented by HO—R.sub.3—OH (wherein R.sub.3 represents a linear or branched C2 to C6 alkylene group optionally having an ether bond), or A represents a polyurethane obtained by reaction of (c) a hydrogenated polybutadiene having hydroxyl groups at the terminals, (d) a diisocyanate compound, and the (b) glycol represented by HO—R.sub.3—OH (wherein R.sub.3 represents a linear or branched C2 to C6 alkylene group optionally having an ether bond), and B represents an oil agent. The polyurethane gel composition of the present invention is particularly useful as a raw material for cosmetics since a film of an oil-soluble gel obtained using the polyurethane gel composition is exceptionally excellent in any point of transparency, high gloss, elasticity, and resilience.

The present invention relates to a novel thermoplastically processible polyurethane polymer having a hardness of ≤60 Shore A, to compositions containing this polyurethane polymer, to the uses thereof and to articles containing this polyurethane polymer.

The present invention relates to a novel thermoplastically processible polyurethane polymer having a hardness of ≤60 Shore A, to compositions containing this polyurethane polymer, to the uses thereof and to articles containing this polyurethane polymer.