Improved leveling aqueous coating compositions

Details Improved leveling aqueous coating compositions Improved leveling aqueous coating compositions

C - Chemistry, Metallurgy

08

B

C08B 11/20 (2006.01) C08B 31/08 (2006.01) C08B 37/00 (2006.01) C08F 8/00 (2006.01) C08F 16/06 (2006.01) C09D 7/00 (2006.01) C09D 7/06 (2006.01)

Patent

CA 2093493

Hydrophobically modified polysaccharide and synthetic polymers with molecular weights of 10,000 to 300,000 serve as associative thickeners in aqueous protective coatings to (-NORTH-)eveling without adversely affecting sag or thickening efficiency. Hydrophobically modified hydroxyethylcellulose, hydroxyethylstarch, hydroxypropylguar, etc. can be degraded with hydrogen peroxide to lower the molecular weight to the desired level. A preferred polysaccharide is hydrophobically modified hydroxyethylcellulose with a weight percent hydrophobe substitution of 0.2 to 2Ø A preferred synthetic polymer is hydrophobically modified poly{vinyl alcohol) with a molecular weight of 10,000 to 50,000.

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