Abstract: The present invention relates to a process for the preparation of rigid foams comprising reacting a polyisocyanate component with an isocyanate-reactive component in the present of a blowing agent. Suitable isocyanate-reactive components for the presently claimed invention comprises polyether polyols having an OH number of from 200 to 800 and containing from 3 to 8 hydroxyl groups wherein the level of alkalinity present in the polyether polyol is equivalent to a hydroxide ion level of from about 0.006% to about 0.21% by weight.

Abstract: The present invention relates to polyurethane encapsulated fertilizer particles which exhibit slow-release properties and to a process for their production. The process comprises applying an isocyanate-reactive component to fertilizer particles, to form fertilizer particles coated with an isocyanate-reactive component, applying a polyisocyanate component onto the coated fertilizer particles to form polyurethane encapsulated fertilizer particles, and, optionally, repeating these steps as many times as necessary to form the polyurethane encapsulated fertilizer particles that contain about 2 to 20% by weight of polyurethane, based on the total weight of the encapsulated fertilizer particles. Suitable isocyanate-reactive components include polyesterether polyols that comprise either a blend of or the reaction product of (i) castor oil having an OH number of about 160 to about 170, a viscosity of about 500 to about 900 mPa.s at 25° C., and a water content of less than 0.

Abstract: A polyisocyanate having an acid value of at least 0.01% HCl is used to produce polyisocyanate, polyisocyanurate and polyurethane urea foams with an HCFC blowing agent. The use of such a polyisocyanate is advantageous because the polyisocyanate does not cause significant decomposition of the HCFC blowing agent.

Abstract: An organic acid having at least two carboxylic acid groups, no tertiary amino groups and a pK.sub.a of up to 3.1 is added to an HCFC blowing agent or to a composition, preferably an isocyanate-reactive composition, in which an HCFC blowing agent is present to reduce decomposition of the HCFC blowing agent. The resultant compositions are useful in the production of polyisocyanurate, polyurethane and/or polyurea foams.

Abstract: Storage stable, liquid prepolymers of diphenylmethane diisocyanate containing urea and/or biuret groups are prepared by reacting an aminocrotonate with a mixture of isocyanates having a specified diphenylmethane diisocyanate isomer content. These prepolymers have isocyanate group contents of from about 5 to about 30%.

Abstract: Disclosed herein is a process for the preparation of a reaction injection molded elastomer comprising injecting a reaction mixture into a closed mold via a RIM machine, with the ratio of components being such that the isocyanate index is from about 70 to about 130, said reaction mixture comprising (a) an organic di- and/or polyisocyanate, (b) an amine terminated chain extender, and (c) a compound which is derived from the reaction of a polyfunctional acetoacetic acid ester and an aliphatic amine having amino groups of different reactivity.

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 thermoplastic molding composition comprising thermoplastic polyurethane and an additive amount of an oligomeric polyalkylphosphonate, characterized by its improved flame resistance.

Abstract: The present invention is directed to a polyester polyol having an hydroxyl number of from about 25 to about 130 and an acid number of 2 or less, produced by reacting(a) from about 40 to about 60 parts by weight of adipic acid,(b) from about 1 to about 20 parts by weight of ethylene glycol,(c) from about 1 to about 30 parts by weight of 1,4-butanediol, and(d) from about 5 to 50 parts by weight of a polyoxyethylene glycol having a molecular weight of from 106 to 680,the total parts of (a), (b), (c) and (d) being 100, and to a blend of such polyester polyol with 1,4-butanediol and/or ethylene glycol.

Abstract: A novel polyether polyurethane polymer comprising the reaction product of an organic diisocyanate and a linear polyhydroxyl polyether having a molecular weight of less than 8000 and from 0.01 to 1%, by weight, of finely-divided inorganic particles is described, together with a process for producing a cast elastomer by reacting this polymer with a cross-linking or chain-extending agent.

Abstract: The present invention is directed to a polyester polyol having an hydroxyl number of from about 25 to about 130 and an acid number of 2 or less, produced by reacting(a) from about 40 to about 60 parts by weight of adipic acid,(b) from about 1 to about 20 parts by weight of ethylene glycol,(c) from about 1 to about 30 parts by weight of 1,4-butanediol, and(d) from about 5 to 50 parts by weight of a polyoxyethylene glycol having a molecular weight of from 106 to 680,the total parts of (a), (b), (c) and (d) being 100, and to a blend of such polyester polyol with 1,4-butanediol and/or ethylene glycol.

Abstract: The present invention is directed to a polyol blend comprising:(a) from about 5 to about 30% by weight of a member selected from the group consisting of 1,4-butanediol, ethylene glycol, and mixtures thereof, and(b) from about 70 to about 95% by weight of a polyester polyol produced by reacting from 10 to 60 parts by weight of adipic acid with from 40 to 90 parts by weight of a polyoxyethylene glycol having a molecular weight of from 150 to 680, the parts of adipic acid and polyoxyethylene glycol being 100, and wherein said polyester has an hydroxyl number of from about 25 to about 130, and an acid number of 2 or less.

Abstract: The present invention is directed to a thermoplastic molding composition comprising thermoplastic polyurethane and a member selected from the group consisting of polyarylphosphonate and polyarylphosphonatocarbonate which composition is characterized by its improved flame retardance.

Abstract: The invention is directed to a molding composition comprising an intimate, well dispersed blend of thermoplastic polyurethane, thermoplastic polyphosphonate and thermoplastic polycarbonate which composition is characterized by an improved level of flame resistance. A process for the preparation of said composition is also disclosed.

Abstract: The instant invention is directed to novel color and hydrolytically stable thermoplastic polyester urethanes. The invention broadly consists of adding 2-oxazolidones to the components of the polyurethane, or to the polyurethane itself.

Abstract: The instant invention is directed to novel color and hydrolytically stable thermoplastic polyester urethanes. The invention broadly consists of adding 2-oxazolidones to the components of the polyurethane, or to the polyurethane itself.