Abstract: This invention relates to a mould material binding agent system for the production of foundry mould parts. This binding agent system contains as components a solution of a phenol-containing polyol having at least two OH groups in the molecule and a polyisocyanate, optionally also in the form of a solution, having at least two NCO groups in the molecule, which react with one another to a cold-hardening binding agent with formation of polyurethane. According to the invention there is also added to the polyisocyanate component a chlorosilane, which for example may comprise one or more compounds of the group trimethyl chlorosilane, dimethyl dichlorosilane, methyl trichlorosilane, tetrachlorosilane, diethyl chlorosilane, vinyl trichlorosilane and diphenyl dichlorosilane. The added quantity is preferably 0.01-2% by wt. relative to the polyisocyanate component.

Abstract: Synthetic rubber dispersions containing carboxyl groups, free from specks and with little tendency to foaming, with advantages for their technical application contain a copolymer of 0.3 to 1.0 parts by weight of itaconic acid and 99.0 to 99.7 parts by weight of a mixture of 10 to 90 parts by weight of one or more acyclic conjugated dienes having 4 to 9 carbon atoms and 10 to 90 parts by weight of one or more aryl vinyl monomers having 8 to 12 carbon atoms and/or (meth)acrylonitrile, in which the quantity of (meth)acrylonitrile is at most 50 parts by weight and wherein up to 25 parts by weight of the non-dissociating monomers may optionally be replaced by one or more other non-dissociating copolymerizable monomers, which dispersions are stabilized with 0.05 to 0.5% by weight, based on the copolymer, of an anionic emulsifier.

Abstract: A silicon rubber mixture for surgical embolization composed of(a) a linear, low viscosity polysiloxane selected from the group consisting of dialkyl, alkylaryl, alkenylalkyl, and diaryl polysiloxanes having reactive functional groups selected from the group consisting of hydroxy, acyloxy, alkoxy and amino;(b) a cyclic dialkyl polysiloxane having the formula [R.sub.2 SiO].sub.4, wherein R is alkyl; anda pharmaceutically acceptable iodo-containing organosilicium X-ray contrast material or non-metallic organic X-ray contrast material. The mixture can be used in cerebrovascular surgery and general surgery for sugical embolization with the aid of a catheter.

Abstract: The present invention relates to a silicone cationic emulsion composition of a polydioganosiloxane containing amino, epoxy, and hydroxyl groups as functional groups, and which may be used as a releasing agent, stripping agent, paint component, and anti-foaming agent.