Abstract: The present invention relates to a stabilized composition containing a polyol/melamine and an effective stabilizing amount of an amine terminated polyether.

Abstract: The present invention relates to a stabilized composition containing a polyol/melamine and an effective stabilizing amount of an amine terminated polyether.

Abstract: The present invention is directed to a polyisocyanate prepolymer prepared by reacting an isocyanate based on 4,4-methylenebis(phenyl isocyanate) and a polyester polyol by reacting 1,4-cyclohexanedimethanol and adipic acid. The invention is also directed to a RIM process using such prepolymers.

Abstract: The present invention is directed to a novel solvent-free process for preparing amine terminated compounds by reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains one or more primary amino groups in the presence of an acidic catalyst selected from the group consisting of (i) boron trifluoride etherate and (ii) organic acids having pKa values of from 0.1 to 0.8.

Abstract: The present invention is directed to a novel internal release agent, a mixture of isocyanate reactive materials containing the release agent and a RIM process using the release agent. The novel release agent is the reaction product of i) an ester prepared by reacting a specific tetrol with a mixture of saturated and unsaturated acids, and ii) a neutralizing agent.

Abstract: Disclosed herein is an improved polyurea system comprising a reaction product of a polyisocyanate and a polyamine and an amine chain extender, the improvement comprising the polyisocyanate containing diethyl methylene diisocyanate, a prepolymer thereof or a mixture thereof, in an amount sufficient to slow down the reaction for use in a reaction injection molding.

Abstract: The present invention is directed to a novel internal release agent, a mixture of isocyanate reactive materials containing the release agent and a RIM process using the release agent. The novel release agent is a reaction product of 1) a polyester prepared by reacting (a) a polymerized fatty acid with (b) a relatively low molecular weight hydroxy group containing compound, and 2) a saturated monocarboxylic acid.

Abstract: The present invention is directed to a novel internal release agent, a mixture of isocyanate reactive materials containing the release agent and a RIM process using the release agent. The novel release agent is an ester prepared by reacting a specific tetrol with a mixture of a saturated and an unsaturated acid.

Abstract: Specified aminocrotonates are described for use as hardeners for expoxide resins.

Abstract: The present invention relates to a process for preparing polyurea-polyurethane elastomers comprising reacting in a closed mold, in accordance with the reaction injection molding technique at an isocyanate index of about 95 to about 110, an isocyanate prepolymer having an isocyanate content of about 5 wt. % to 10 wt. % and a molecular weight range of about 1000 to 4000 with a diamine chain extender having no isocyanate-reactive groups other than amino groups in the substantial absence of compounds having isocyanate-reactive groups other than amino groups. The present invention further relates to the polyureapolyurethane elastomers produced by the process of this invention.

Abstract: The present invention is directed to a novel internal release agent for the production of polyurethane and/or polyurea elastomers, to an isocyanate reactive composition containing that release agent and to the use of the release agent in a RIM process. The release agent is the reaction product of i) a transester of a) a polyester derived from a polymerized fatty acid and either neopentyl glycol or 2,2,4-trimethyl-1,3-pentane diol and b) an acetoacetate and ii) an aliphatic monoisocyanate.

Abstract: The present invention is directed to a novel internal release agent for the production of polyurethane and/or polyurea elastomers, to an isocyanate reactive composition containing that release agent and to the use of the release agent in a RIM process. The release agent is the reaction product of i) a polyester derived from a polymerized fatty acid and either neopentyl glycol or 2,2,4-trimethyl-1,3-pentane diol and ii) an aliphatic monoisocyanate.

Abstract: This invention relates to a storage-stable solid isocyanate compositions that are substantially crystalline at room temperature comprising the reaction products of organic isocyanates with substoichiometric quantities of 2-methyl-1,3-propanediol.This invention further to a method of using the solid isocyanate compositions of the invention in the preparation of polyurethane products.

Abstract: The present invention is directed to a novel prepolymer and the use thereof in a RIM process. The prepolymer is an isocyanate terminated prepolymer having an isocyanate group content of from about 10 to about 26% by weight, and being prepared by a process comprising:(a) reacting a C.sub.1 to C.sub.5 alkyl acetoacetate, with a polyol having a molecular weight of from about 500 to about 6000, and a hydroxyl functionality of from 2 to 4, and(b) reacting the resultant product with an organic di- and/or polyisocyanate.

Abstract: The present invention is directed to a process for preparing amine terminated compounds by reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains one or more primary amino groups in the presence of a solvent and an acidic catalyst selected from the group consisting of (i) boron trifuloride etherate and (ii) organic acids having pKa values of from 0.1 to 0.8 with the proviso that if the primary amino group containing compound contains no aromatically bound amino groups, the pKa of said organic acid is from 0.1 to less than 0.7.

Abstract: This invention relates to storage-stable solid isocyanate compositions that are substantially crystalline at room temperature comprising the reaction products of organic isocyanates with substoichiometric quantities of 2-methyl-1,3-propanediol.This invention further to a method of using the solid isocyanate compositions of the invention in the preparation of polyurethane products.

Abstract: Thermoplastic molding compositions containing at least one member selected from among aromatic polycarbonate and aromatic polyestercarbonate resins were plasticized by incorporating therewith a small amount of a copolyetherester conforming to ##STR1## wherein x is about 2 to 15, n is about 3 to 10 and y is about 1 to 10. A and A' are end groups which may independently be a hydroxy group, a carboxy radical, a C.sub.1 -C.sub.8 alkoxy or a C.sub.6 -050249762 C.sub.10 aryloxy group. The compositions of the invention are characterized by their improved processability.

Abstract: The present invention is directed to isocyanate terminated prepolymers prepared from polyetheresters and isocyanates, and to the process of making elastomers and elastomers so produced.

Abstract: The present invention is directed to a polyisocyanate comprising the reaction product of(a) an isocyanate selected from the group consisting of methylenebis(phenylisocyanate), polymethylenepoly(phenylisocyanate), and mixtures thereof, and(b) a polyester polyol having a hydroxyl functionality of from 2 to 3 and a molecular weight of from about 750 to about 3500, said polyester polyol prepared by reacting neopentyl glycol and adipic acid,the isocyanate group content of said reaction product from about 14% to about 28% by weight. The invention is also directed to a RIM process using such prepolymers.