Abstract: A film-forming composition comprises from 0.1-8% by weight of an oligomeric polyglycidyl ether or ester and a polymer mixture ofa) a graft polymer prepared by polymerizing a monomer mixture of acrylonitrile, and alpha-methylstyrene and/or an alkylmethacrylate; or methylmethacrylate optionally with other monomers, onto cross-linked alkylacrylate rubber particles;b) a partially cross-linked rubber-like copolymer derived from an alkylacrylate and other monomers;c) an uncross-linked polymer of styrenes, (meth)acrylonitrile, (meth)acrylic acid esters and/or vinyl carboxylic acids; and optionallyd) a graft polymer obtained from the polymerization of a mixture of acrylonitrile, and styrenes and/or an alkylmethacrylate; or methylmethacrylate optionally with other monomers, onto cross-linked alkylacrylate rubber particles.

Abstract: This invention relates to flexible, soft polymer mixtures which are suitable for the production of sheets with a leather-like appearance and can be worked up by calendering and deep drawing and to a process for their preparation.

Abstract: Fogging of plastics containing polymer plasticizers is reduced by treating the polymer plasticizers with water vapor in the melt.

Abstract: This invention relates to a mixture of from 60 to 95% by weight of a diglycidyl ester of hexahydrophthalic acids and from 5 to 40% by weight of 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate. In combination with conventional polycarboxylic acid anhydrides as hardeners, this mixture is used for the production of molded bodies with excellent weathering resistance, good electrical properties and surprisingly good mechanical properties.

Abstract: Mixtures of (A) from 50 to 90% by weight of aromatic polycarbonate and (B) from 10 to 50% by weight of polybutylene terephthalate, the percent by weight being based on the total of (A) and (B) are used to produce novel films.

Abstract: For consolidation of geological formations and artificial beds of rock, earth, and coal by means of foaming and hardening polyisocyanate/polyol blends, diols with secondary hydroxyl functions of the OH number range 150-1000 are used as diol component. Preferably a crude polyisocyanate blend (MDI) obtained by phosgenation of aniline/formaldehyde condensates which at ambient temperature assumes a liquid state, and the liquid prepolymers of said crude MDI are used as isocyanate components.

Abstract: Waterglass solutions are mixed with polyisocyanates and these emulsions are then left to harden in the formations. Introduction of the mixture into the formations which are required to be consolidated, e.g. deposits of coal, is mainly carried out by forcing the mixture under pressure into bore-holes in the formations. According to one variation of the process, the components of the mixture are introduced into the multi-chamber cartridges which are introduced into the bore-holes and then destroyed as the components are mixed. Certain additives such as accelerators, blowing agents, polyols, stabilizers and/or thixotropic agents are advantageous for the quality of the composite masses formed by hardening of the mixture.

Abstract: The present invention relates to a two-compartment cartridge which is suitable for securing stay bars in bore holes by means of polyurethane resins and which is destructible by the stay bar, containing a polyisocyanate component on the one hand and a polyol component on the other hand, distinguished by the fact that the polyisocyanate component used is an aromatic polyisocyanate or a mixture of aromatic polyisocyanates, while the polyol component used is a polyol containing tertiary amine nitrogen and having a molecular weight of from about 119 to 3000 or a polyol mixture containing at least one such polyol.

Abstract: The instant invention is directed to a process for the solvent-free production of solid polyurethane moldings wherein the polyisocyanate used is a polyisocyanate mixture containing from 10 to 80% by weight of 2,4'-diisocyanatodiphenylmethane.

Abstract: The instant invention is directed to a process for the production of heat-resistant synthetic resins containing isocyanurate groups by the polymerization of organic polyisocyanates in the presence of catalysts which accelerate the trimerization of isocyanate groups, wherein said polyisocyanate component is a mixture of isomers and/or homologs of polyisocyanates of the diphenylmethane series containing more than 20%, by weight, of 2,4'-diisocyanatodiphenylmethane.

Abstract: Hardenable mixtures ofA. 40 to 90% by weight of at least one aromatic polyfunctional cyanic acid ester,B. 10 to 60% by weight of at least one polymerizable olefinically unsaturated monomer and, optionally,C. 0.01 to 10% by weight, based on the sum of A) and B) of at least one hardening catalyst such as amines, Mannich bases and organic metal compounds. They are suitable for use as casting resins and as pourable sealing compounds for covering materials, for producing shaped articles, coatings, bonds, electrical insulations, as binders for fibre-reinforced plastics.

Abstract: This invention concerns a method of consolidating geological formations, heaped rock and earth masses by applying a polyurethane reaction system to the material to be consolidated. The reaction system comprises a polyisocyanate component and a polyol component wherein the polyol component contains about 5 to 50 wt.% of a special polyether with an OH number under about 100. This polyether is produced by the reaction of a compound having more than one reactive hydrogen atom per molecule and a molecular excess of a 1,2-alkylene oxide. The reaction system can also contain conventional polyurethane additives such as foaming agents, fillers, foam stabilizers and catalysts. In a preferred embodiment, the special polyether is produced from ethylene diamine or triethanol amine.

Abstract: The present invention relates to a process for the reinforcement of geological formations and loose rock and earth masses by introducing, into the cavities of the geological formations or rock or earth masses which are required to be reinforced, reaction mixtures based on organic polyhydroxyl compounds and organic polyisocyanates which react to form polyurethanes, which process is characterized in that the polyisocyanate component used is a polyisocyanate mixture containing from about 10 to 80%, by weight, of 2,4'-diisocyanato-diphenylmethane. The present invention also relates to a two-chamber cartridge suitable for carrying out the process according to the present invention.

Abstract: The instant invention relates to a process for the production of crosslinked plastics comprising reacting organic polyisocyanates, organic polyhydroxyl compounds and olefinically unsaturated monomers, optionally in the presence of catalysts and/or other auxiliaries and additives, wherein(a) the polyhydroxyl compounds used are olefinically unsaturated polyhydroxyl polyesters with OH-numbers in the range of from 200 to 1000, molecular weights in the range of from 200 to 800 and double bond contents of from 0.1 to 0.5 gram equivalents of C.dbd.C double bonds per 100 g of polyester;(b) the olefinically unsaturated monomers used are olefinically unsaturated compounds with no more than one isocyanate-reactive group and boiling points in the range of from 40.degree. to 250.degree. C, the monomers being employed in such quantities that, for every olefinically unsaturated double bond in the polyhydroxyl compound (a) there are from 0.

Abstract: Foundry cores and molds are produced from foundry sand and/or other inert fillers, polyhydroxyl compounds, polyisocyanates and tertiary amine catalysts. The precatalyzed mixtures can be stored for long periods of time without any adverse effects on the subsequent processing or core properties when at least 80% by weight of the polyisocyanate used is of the diphenyl alkane series in which the isocyanate groups are sterically hindered solely by substituents in at least one ortho position.

Abstract: The instant invention is directed to a process for the production of heat-resistant synthetic resins containing isocyanurate groups by the polymerization of organic polyisocyanates in the presence of catalysts which accelerate the trimerization of isocyanate groups, wherein said polyisocyanate component is a mixture of isomers and/or homologs of polyisocyanates of the diphenylmethane series containing more than 20%, by weight, of 2,4'-diisocyanatodiphenylmethane.

Abstract: Waterglass solutions are mixed with polyisocyanates and these emulsions are then left to harden in the formations. Introduction of the mixture into the formations which are required to be consolidated, e.g. deposits of coal, is mainly carried out by forcing the mixture under pressure into bore-holes in the formations. According to one variation of the process, the components of the mixture are introduced into the multi-chamber cartridges which are introduced into the bore-holes and then destroyed as the components are mixed. Certain additives such as accelerators, blowing agents, polyols, stabilizers and/or thixotropic agents are advantageous for the quality of the composite masses formed by hardening of the mixture.