Stable defoamer powder, especially for use in detergent, cleaning or plant protectant compositions, contains water-insoluble defoamer oil, filler, powdered carrier and carboxylated vinyl polymer stabilizer

摘要

Defoamer powder comprises: (1) 2-30 parts weight of a defoamer formulation consisting of water-insoluble defoamer oil and filler; (2) 50-100 parts weight powdered carrier material and (3) 0.1-30 parts weight of linear and/or branched vinyl polymers containing both free or salified carboxy groups and higher hydrocarbyl groups. Defoamer powder comprises: (1) 2-30 parts weight of a defoamer formulation consisting of water-insoluble defoamer oil(s) and filler(s); (2) 50-100 parts weight powdered carrier material(s) and (3) 0.1-30 parts weight of linear vinyl polymer(s) of formula R1-(C(R)2-C(R)2)n-R1 (I) and/or branched polymer(s) consisting of linear chains corresponding to (I) linked by incorporation of vinyl monomers having at least 2 radical polymerizable unsaturated groups. R1 = H or the residue of a photochemically or thermally activated initiator; R = H, 1-30C hydrocarbyl, COOH (or its salt), COOR2, CON(R3)2 or OCOR2; or two R on adjacent C = -C(O)-OOC(O)- or -C(O)-N(R3)-C(O)-; R2 = 1-30C hydrocarbyl; R3 = H or as R2 and n = 10-100000; provided that at least 5 mol. % of R groups are COOH (or salt) and at least 0.1 mol. % of R groups are more than 8C hydrocarbyl or COOR2, CON(R2)2 or OCOR2 in which R2 has more than 8C.