Patent ID: 6379751
Filing Date: 2002-04-30
Classification: C08G,C09D,C14C

Abstract:
A water-repellent system comprising(a) a polysiloxane containing carboxyl groups wherein the polysiloxane chain contains â€ƒat least one structural unit of the formula (1) [ARaSiO(3âˆ’a)/2]kâ€ƒâ€ƒ(1) â€ƒand/or at least one structural unit of the formula (2) [RcSiO(4âˆ’c)/2]nâ€ƒâ€ƒ(2) â€ƒand optionally at least one terminal group selected from the formulas R3SiO1/2â€ƒâ€ƒ(3) andAR2SiO1/2â€ƒâ€ƒ(3a), â€ƒwhereinA represents a radical containing carboxyl groups and has the formula â€ƒwhereinR1, R2, and R3, independently of one another, represent hydrogen or a monovalent C2-C60-hydrocarbon radical that optionally contains one or more non-neighboring ether, imino, amido, urea, urethane, ester, or carboxyl groups and that is optionally substituted by one or two carboxyl groups â€”COOM and/or one or two hydroxyl groups, wherein M represents hydrogen, Na+, K+, Li+, NH4+, or â€ƒin which R4, R5 and R6, independently of one another, represent C1-C18-alkyl or substituted C1-C18-alkyl, or aralkyl,D and E, independently of one another, represent a divalent C2-C20-hydrocarbon radical that is optionally substituted by hydroxyl or interrupted by non-neighboring O atoms, and q represents 0 to 3, with the provisos that (i) A is substituted at least by one group COOM, (ii) R1 to R3, independently of one another, are linked to the nitrogen atom via a single bond or a group â€”COOâ€”, â€”COâ€” or â€”CONHâ€”, and (iii) R1 and R2 do not simultaneously represent H and are not simultaneously linked to the nitrogen atom via a carbonyl group, R represents a C1- to C12-alkyl radical or a phenyl radical, a represents 0 or 1, k represents 0 to 50, c represents 1 or 2, and n represents 10 to 1000, â€ƒwith the proviso that at least one terminal group of the formula (3a) is present where the polysiloxane chain contains only structural units of the formula (2), and (b) at least one component from the group B1 to B4, wherein B1 is an anionic copolymer, B2 is polyaspartic acid or a derivative thereof, B3 is a paraffin, and B4 is an isocyanate adduct.