The present invention uses a urethane resin composition including a urethane resin (A), a multifunctional acrylate (B), and a solvent (C). The urethane resin (A) is a reaction product of a polyol (a1) and a polyisocyanate (a2). The polyol (a1) includes an alkylene diol (a1-1) having two or more polymerizable unsaturated groups and represented by general formula (1) or an oxyalkylene diol (a1-2) having two or more polymerizable unsaturated groups and represented by general formula (2) below. The proportion of polymerizable unsaturated bonds in the urethane resin composition is within a range of 3 to 9 mmol/g. The urethane resin composition is a urethane resin composition that can form a coating film having excellent hardness, scratch resistance, and flexibility.
HO—R.sup.1—OH  (1)
HO—R.sup.1O—R.sup.2—OR.sup.3—OH  (2)

A coating composition that includes a polymer having (i) a barrier segment with aromatic groups and urethane linkages, urea linkages, or a combination thereof and (ii) an elastomeric segment that is different from (i). The barrier segment makes up at least 30 weight % of the polymer based on the total solids weight of the polymer. Further, the composition also includes an adhesion promoter having: (a) at least one epoxy functional polymer and a thiol functional crosslinker reactive with the epoxy functional polymer; and/or (b) a hydrazide functional component.

The present invention provides long chain, active polyether polyols which are characterized by a functionality of 2 to 6 and an equivalent weight of 1000 to 2200 Da. These long chain polyethers comprise the alkoxylation product of (1) a starter composition having an equivalent weight of 350 Da or less, with (2) one or more alkylene oxides, in which up to 20% of ethylene oxide may be added as a cap, in the presence of (3) at least one basic catalyst. Suitable starter compositions (1) comprise the alkoxylation product of (a) a low molecular weight polyether having a functionality of 3 and an equivalent weight of less than 350 Da, (b) at least one low molecular weight starter compound comprising glycerin, and (c) propylene oxide or a mixture of propylene oxide and ethylene oxide, in the presence of (d) at least one double metal cyanide catalyst. A process for preparing these long chain polyether polyols is also disclosed.

An antifouling thermoplastic polyurethane (TPU) composition comprises a thermoplastic polyurethane and an organometallic antifouling additive and has a surface energy of from about 18 to about 26 mJ/m.sup.2. An article which is resistant to adhesion of organisms comprises the antifouling thermoplastic elastomer (TPU) composition having a surface with a 3-dimensional surface topography.

The present invention is a composite stretchable film including: a surface film which is a cured product of a polyurethane 1 containing a copolymer of one or more of units a1 to a4 and silicone-pendant type urethane units b1 and/or b2 represented by the following general formula (1); and an inner film which is a cured product of a polyurethane 2 containing a unit c having polyether and urethane bonds represented by the following general formula (2), on which the surface film is laminated. The present invention provides a stretchable film that has excellent stretchability and strength, with the film surface having excellent water repellency, and a method for forming the same.

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The present invention relates to a biostable polyurethane or polyurea comprising: (a) a soft segment comprising a polysiloxane of the general formula (I); and (b) greater than 0 and less than 40 wt % of a hard segment which is a reaction product of a diisocyanate and a linear difunctional chain extender, processes for their preparation and their use in the manufacture of biomaterials, devices, articles or implants.

The present invention uses a urethane resin composition including a urethane resin (A), a multifunctional acrylate (B), and a solvent (C). The urethane resin (A) is a reaction product of a polyol (a1) and a polyisocyanate (a2). The polyol (a1) includes an alkylene diol (a1-1) having two or more polymerizable unsaturated groups and represented by general formula (1) or an oxyalkylene diol (a1-2) having two or more polymerizable unsaturated groups and represented by general formula (2) below. The proportion of polymerizable unsaturated bonds in the urethane resin composition is within a range of 3 to 9 mmol/g. The urethane resin composition is a urethane resin composition that can form a coating film having excellent hardness, scratch resistance, and flexibility.

HOR.sup.1OH (1)

HOR.sup.1OR.sup.2OR.sup.3OH (2)

This invention provides polyurethane foams containing a brominated flame retardant. Also provided are formulations and methods for preparing polyurethane foams containing a brominated flame retardant.

To provide an aqueous resin composition including: an anionic polyurethane (A) having an aromatic ring; an acrylonitrile butadiene rubber (B); an aqueous medium (C); a vulcanizing agent (D); and a vulcanizing accelerator (E). The anionic polyurethane (A) is preferably a product of reaction of polyoxytetramethylene glycol, a carboxyl group-containing glycol, ethylene glycol, and diphenylmethane diisocyanate, or a product of reaction of polyoxytetramethylene glycol, a carboxyl group-containing glycol, butanediol, and diphenylmethane diisocyanate. An object of the invention is to provide a mixture of aqueous polyurethane and NBR having excellent storage stability, even in a case where the vulcanizing agent and the vulcanizing accelerator are added.

The present invention relates to a method for producing a biopolyether polyol, which is a copolymerization reaction of tetrahydrofuran and 2-methyltetrahydrofuran in a monomer ratio (by mass) of 85/15 to 50/50, and the resulting polyether polyol of 100% plant origin having a number-average molecular weight of 500-5000. In addition, a polyurethane resin, which is the product of a synthetic reaction having as the main reactants the above polyether polyol of 100% plant origin, a polyisocyanate compound, and a chain extender that reacts with isocyanate groups, has a change in storage modulus (E) in the low temperature range (0 C.) with respect to normal temperature (20 C.) of within 0-15%.