首页>
外国专利>
AQUEOUS DISPERSIONS BASED ON SILICONE OILS CROSS-LINKABLE BY WATER REMOVAL AND THEIR USE AS ELASTIC SEALINGS
AQUEOUS DISPERSIONS BASED ON SILICONE OILS CROSS-LINKABLE BY WATER REMOVAL AND THEIR USE AS ELASTIC SEALINGS
展开▼
机译:基于硅油的水分散体可通过除水交联并用作弹性密封
展开▼
页面导航
摘要
著录项
相似文献
摘要
Aqueous dispersions containing: a silicone oil (A) which is cross-linkable by condensation, optionally in the presence of a cross-linking agent (B), into an elastomer; optionally a cross-linking agent (B), a silane (C) and a mineral filler (D); and a catalytic amount of a hardening compound (E). Said dispersions are characterized in that they are produced by kneading a mixture of (1) a silicone phase (F) with a viscosity of at least 3 Pas, containing the oil (A) and optionally one or more of components (B), (C), (D) or (E), and 2) an aqueous phase comprising water and at least one surfactant (G), wherein the weight ratio water/water + surfactant(s) is such that the viscosity of the aqueous phase is preferably at least as high as that of the silicone phase (F); for a sufficient time and with sufficient shear to give an oil-in-water emulsion having a particle size of 0.1-5 micrometres; and optionally by diluting with water until a 25-97 % dry extract is obtained; followed by adding the component(s) not present in the silicone phase (F).
展开▼