Abstract: The invention is directed to a process for protecting the edges of a panel by applying a non-sagging polyurethane composition to the edges of said panel, and allowing the composition to cure.

Abstract: A novel polyurethane prepared by reacting a) a specific polyol or specific polyol blend, b) an organic diamine, c) fillers, and d) a specific polyisocyanate is described. The invention also relates to the use of the polyurethane in the preparation of a composite structure wherein the polyurethane is applied to an adhesive coated ceramic enamel layer. The composites are eminently suitable for use in plumbing applications (e.g. as a bathtub).

Abstract: A novel polyurethane prepared by reacting a) a specific polyol or specific polyol blend, b) an organic diamine, c) fillers, and d) a specific polyisocyanate is described. The invention also relates to the use of the polyurethane in the preparation of a composite structure wherein the polyurethane is applied to an adhesive coated ceramic enamel layer. The composites are eminently suitable for use in plumbing applications (e.g. as a bathtub).

Abstract: The present invention is directed to a process of preparing a polyurethane structural support by spraying a specific polyurethane onto a substrate. The polyurethane is prepared by reacting a specific polyol blend, an organic diamine, and an isocyanate in the presence of a moisture absorbing material and a polysiloxane defoaming agent.

Abstract: The present invention relates to polyisocyanate mixtures of(A) 21 to 95% by weight of toluene diisocyanate and(B) 5 to 79% by weight of a mixture of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates containing (1) 55 to 87% by weight of 4,4'-diphenylmethane diisocyanate, (2) 8 to 30% by weight of 2,4'-diphenylmethane diisocyanate, (3) 0 to 4% by weight of 2,2'-diphenylmethane diisocyanate, and (4) 5 to 35% by weight of polyphenyl polymethylene polyisocyanates.The invention also relates to a process for preparing flexible polyurethane foams in which polyisocyanate mixtures of the invention are used as the polyisocyanate component.

Abstract: The present invention is directed to a process for the production of heat curable, flexible, polyurethane molded foams by the reacting inside a closed mold(a) polyisocyanates with(b) compounds having a molecular weight of 400 to about 10,000 and containing at least two isocyanate-reactive groups and(c) optionally chain lengthening and/or cross-linking agents in the molecular weight range of 32 to 399 and containing at least two isocyanate-reactive groups in the presence of(d) a catalyst based on carbonic acid diamide and(e) a blowing agent based on water, characterized in that1. the polyisocyanates (a) are based on diphenyl-methane diisocyanate which may optionally be alkyl substituted, toluylene diisocyanate, hexamethylene diisocyanate and/or isophorone diisocyanate,2. carbonic acid diamide is used in a quantity of 0.05 to 1.0 parts by weight, preferably about 0.3 to 0.7 parts by weight, based on 100 parts by weight of component (b),3.

Abstract: This invention relates to a process for the production of elastic, open-cell flexible slabstock polyurethane foams comprising reacting at an isocyanate index less than about 80 one or more polyisocyanates selected from the group tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of the isocyanate-reactive compound. The process may optionally include chain-extending and crosslinking agents containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399, and may optionally be carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.

Abstract: The present invention is directed to a process for the preparation of cold setting, flexible, polyurethane, molded foams in a closed mold by reacting a polyisocyanate with a high molecular weight polyol in the presence of about 5 to 15, preferably about 6 to 12 parts by weight of water, based on the weight of the high molecular weight polyol at an isocyanate index below 70.

Abstract: Amine-modified polyurethane (urea) foams are made by reacting a polyisocyanate with a relatively high molecular weight isocyanate-reactive compound in the presence of a difunctional and/or polyfunctional amine corresponding to the formula(e) ##STR1## in which X, R', R", m and n each represent specified groups or values. The amine is used in a quantity of from 0.01 to 5 parts by weight for every 100 parts by weight relatively high molecular weight isocyanate-reactive compound. Known additives and auxiliaries may also be included in the reaction mixture. The foams thus produced are characterized by improved mechanical properties and reduced amine odor. These foams are usefuel as cushioning materials, insulating materials, coatings and elastomeric materials.