Patent ID: 7311770

Claim:
A granulated hydrophobing additive comprising: from 5 to 30% by weight of an organopolysiloxane, from 10 to 45% by weight of a binder material selected from the group consisting of: (i) water soluble binders, and (ii) water dispersible binders, and from 50 to 85% by weight of a carrier, the organopolysiloxane having the formula: R 3 Si—O—[R′ 2 SiO] a —[R″R′SiO] b —[R′ 2 SiO] c —Si—R 3 wherein each R substituent is selected from the group consisting of: (i) a hydroxyl group, (ii) an alkyl group, (iii) an alkenyl group, (iv) an aryl group, (v) an alkaryl group, (vi) aralkyl group, (vii) an alkoxy group, (viii) an aryloxy group, and (ix) a hydrogen atom, wherein each R′ substituent may be the same or different and is selected from the group consisting of: (a) a hydroxyl group, (b) a hydrogen atom, (c) a hydrocarbon group, (d) a substituted hydrocarbon group, and (e) an OR″′ group wherein R″′ is a hydrocarbon group with 1 to 6 carbon atoms; each R″ is an organopolysiloxane chain of the formula O—[R′ 2 SiO] x SiR 3 ; a is an integer, b, c and x are zero or an integer; whereby the total of b+c is no more than 10% of the total of a+b+c+x and at least 10% of the cumulative total of R+R′ substituents is hydrogen, and wherein the organopolysiloxane and the binder material are deposited on the carrier.