| 摘要 |
Blocking resistance of highly pigmented aqueous coating compositions is improved by addition of an anti-blocking organosilicon composition containing.
A) 100 parts by weight of at least one aminoalkyl-functional organopolysiloxane;B) from 1 to 20 parts by weight of at least one aminoalkyl-functional alkoxysilane or partial hydrolysis product thereof, andC) from 10 to 500 parts by weight of at least one silanol-functional organopolysiloxane free of aminoalkyl groups,wherein the weight percentages of A), B), and C) are relative to the total weight of components A), B), and C).;The organosilicon composition is advantageously supplied in the form of an aqueous emulsion. |
| 主权项 |
1. A highly pigmented aqueous coating composition containing a film forming polymer as a binder, which has a high blocking resistance, comprising: from 0.5 to 15 weight percent of anti-blocking organosilicon composition based on the total weight of the aqueous coating composition, the anti-blocking organosilicon composition comprising components A, B, and C:
A) 100 parts by weight of at least one aminoalkyl-functional organopolysiloxane; B) from 1 to 20 parts by weight of at least one aminoalkyl-functional alkoxysilane or partial hydrolysis product thereof, and C) from 10 to 500 parts by weight of at least one silanol-functional organopolysiloxane free of aminoalkyl groups,wherein the parts by weight of components B and C are relative to 100 parts by weight of A, and wherein the weight percentage of the antiblocking organosilicon composition in the aqueous coating formulation is based on use of an aqueous emulsion of A, B, and C having a solids content of 60 weight percent of A, B, and C. |
