Abstract: High concentration-low viscosity polymer-polyols are prepared by polymerizing mixtures of acrylonitrile and styrene in polyols, which are free of any polymerizable carbon-carbon double bond, in the presence of alkyl-substituted tertiary amines. Without use, as a dispersion stabilizer, of organic compounds which have a polymerizable carbon-carbon double bond and terminal hydroxyl groups, there can be obtained polymer-polyols which have a concentration of the polymer of 33-60 wt % and a glass transition temperature of the polymer of 90.degree.-120.degree. C.

Abstract: High concentration-low viscosity polymer-polyols are prepared by polymerizing mixtures of acrylonitrile and styrene in polyols, which are free of any polymerizable carbon-carbon double bond, in the presence of alkyl-substituted tertiary mines. Without use, as a dispersion stabilizer, of organic compounds which have a polymerizable carbon-carbon double bond and terminal hydroxyl groups, there can be obtained polymer-polyols which have a concentration of the polymer of 33-60 wt % and a glass transition temperature of the polymer of 90.degree.-120.degree. C.

Abstract: This invention relates to a novel polyaldimine, preparation process of the polyaldimine, moisture curable polyurethane composition containing the polyaldimine and use of the compositionPolyaldimine of this invention is represented by the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are a halogen atom, hydrogen atom, alkoxy group having 4 or less carbon atoms or an alkyl group having 5 or less carbon atoms, and may be the same or different; R.sup.4 is a hydrogen atom or a methyl group; Y is --N.dbd.CH--C(R.sup.5).sub.3 or --N.dbd.CH--C(CH.sub.3).sub.2 --CH.sub.2 --O--CO--R.sup.6 wherein R.sup.5 is an alkyl having 4 or less carbon atoms, R.sup.6 is an alkyl group, anilino group, benzylamino group or an alkylamino group having 16 or less carbon atoms; and l is an integer of 1 or 2, m is an integer of 1 to 3, and n is an integer of 0 to 300.Polyaldimine is prepared by condensation of the corresponding aromatic polyamine and aldehyde.

Abstract: This invention relates to .beta.-amino-.beta.-propiolactam derivativatives, moisture curable polyurethane compositions and their applications.The products of this invention have excellent characteristics such as good storage stability, rapid curing with atmospheric moisture and freedom from foaming.More particularly, condensed compounds are obtained by reacting specific secondary diamines such as piperazine and 1,3-(4,4'-dipiperidyl)propane with monoaldehyde having at least 3 carbon atoms, for example, isobutylaldehyde and .beta.-phenylpropylaldehyde. The .beta.-amino-.beta.-propiolactam derivatives are prepared by reacting the condensed compounds with monoisocyanate such as phenyl isocyanate and equimolar reaction products of diisocyanate with lower monohydric alcohol.In addition, the moisture curable polyurethane compositions contain said derivatives and polyisocyanate and/or polyurethane prepolymer having terminal isocyanato radicals.

Abstract: A super-soft polyurethane elastomer is prepared by reacting an organic polyisocyanate in the presence of a specified organometallic catalyst, with a molar ratio specified mixture of (a) low molecular weight triol and high molecular weight polyol, or (b) low molecular weight triol, aromatic ring containing low molecular weight diol and high molecular weight polyol.

Abstract: A thermosetting polyurethane resin which when used as a one-pack surface-protective coating agent for glass bottles, inorganic vessels, and the like exhibits excellent mechanical strength, appearance, and water resistance at sterilization temperatures of about 90.degree. C. is obtained by interacting: (a) 10 to 40% by weight of at least two polyoxyalkylene polyols based on the weight of the nonvolatile matter of the thermosetting polyurethane resin, said at least two polyoxyalkylene polyols including 1 to 8% by weight relative to the nonvolatile matter of the thermosetting polyurethane resin of a nonionic surface active agent selected from the group consisting of a polyoxyethylene glycol or a polyoxyethylene-polyoxypropylene glycol, and mixtures thereof, (b) a monofunctional isocyanate-blocking agent, (c) a chain-elongating agent, (d) a cross-linking agent, and (e) a mixture of methylene-bis (4-cyclohexylisocyanate) and iso-phorone diisocyanate at a molar ratio in the range of from 1:0.3 to 1:1.5.

Abstract: An aqueous dispersed urethane composition which is excellent in film-forming property and useful in protecting glass bottles when formed into a film can be obtained by producing a urethane oligomer by interacting a polyoxyalkylene glycol having a molecular weight equal to or above 1200, a low molecular weight chain-elongating agent selected from a glycol, an amino-alcohol and a diamine each having a molecular weight below 500, an isocyanate-blocking agent selected from an oxime, a lactam and an alcohol, and a diisocyanate, and dispersing the urethane oligomer and a hardener in water by the use of a surface active agent such that the sum by weight of the surface active agent contained in the aqueous dispersed urethane composition and the polyoxyalkylene glycol which is one of the starting materials for the production of the urethane oligomer is in the range of 15 to 35% of the sum by weight of the surface active agent, the urethane oligomer and the hardener.

Abstract: A thixotropic urethane-base sealing material comprising a base polymer selected from the group consisting of a urethane prepolymer and a mixture thereof with a polyol, prior to being hardened, colloidal silica or bentonite used as an anti-sag agent, and an additive used in synergistic combination with the anti-sag agent selected from the group consisting of a sulfoxide expressed by the formulaR.sup.1 SOR.sup.2wherein R.sup.1 and R.sup.2 each represent lower alkyl, and an amide expressed by the formulasR.sup.3 CONR.sup.4 R.sup.5and ##STR1## wherein R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent hydrogen or lower alkyl, whereby the thixotropic properties of the base polymer are remarkably improved, and a process for producing said material.