| 摘要 |
Aqueous silicone dispersions crosslinkable into elastomeric state by elimination of water therefrom, well adapted for the production of elastomer seals, e.g., for the building industry, include: (A) 100 parts by weight of an oil-in-water emulsion of an alpha , omega -(dihydroxy)polydiorganosiloxane stabilized with at least one anionic or nonionic surface-active agent, or mixture thereof; (B) 1 to 100 parts by weight of an hydroxylated silicone resin containing, per molecule, at least two different recurring structural units selected from among those of the formulae: R3SiO0.5, R2SiO, RSiO1.5 and SiO2, wherein the radicals R, which may be identical or different, are vinyl, phenyl or 3,3,3-trifluoropropyl radicals, or linear or branched chain alkyl radicals containing from 1 to 6 carbon atoms, said resin having a hydroxyl group weight content of from 0.1% to 10%; (C) 0 to 250 parts by weight of a nonsiliceous inorganic filler; (D) 0.01 to 3 parts by weight of a metal curing catalyst compound; and said dispersions having a solids content of at least 40%.
|
