| 主权项 |
1. A weather-resistant paint or coating which is an aqueous emulsion, comprising:
a) at least one organic polymer binder; b) optionally, one or more pigments; c) optionally, one or more surfactants; and d) from 0.1 weight percent to 10 weight percent based on the total weight of the aqueous emulsion, of a composition comprising: at least one organosiloxane of the formula (I)
MmDnToQp (I), in which M is a terminal group of the formula (Ia)
R1R2R3SiO1/2 (Ia), D is a difunctional group of the formula (Ib)
R4R5SiO2/2 (Ib), T is a trifunctional group of the formula (Ic)
R6SiO3/2 (Ic), Q is a unit of the formula SiO4/2, where R1, R2, R3, R4, R5 and R6 independently of one another are hydrocarbon radicals having 1 to 20 C atoms, optionally containing heteroatoms, or are hydroxyl radicals, or alkoxy radicals having 1 to 10 C atoms, where at least one hydrocarbon radical R6 contains at least one amine function, and not more than 25% of all of the radicals are hydroxyl or alkoxy radicals, m is an integer 0-20, n is an integer 0-1000, o is an integer 1-30, p is an integer 0-20, and m+n+o+p is an integer which is at least 2, and epoxides of the formula (II)
(A-B)qC (II) in which A independently at each occurrence is a monovalent linear or branched hydrocarbon radical having 1 to 30 C atoms, optionally substituted by heteroatoms or which is optionally interrupted by heteroatoms, and which optionally contains one or more epoxy functions, B independently at each occurrence is a divalent ether, carbonate, or urea function or is an acid, ester, urethane, acid-anhydride, or amide function of a carboxylic acid, thiocarboxylic acid, sulfonic acid, phosphoric acid, or phosphoric acid, q is a number from 1 to 8, C is a q-valent linear or branched hydrocarbon radical having one to 30 C atoms which optionally contains heteroatoms, and which optionally contains one or more epoxy functions, with the proviso that the compound of the formula (II) comprises at least one epoxy function wherein the ratio of molar equivalents of epoxy functions in the epoxides of formula (II) to amine functions in the organosiloxanes of formula (I) is from 1 to 50. |
