Soil-repellent coating composition

Details Soil-repellent coating composition Soil-repellent coating composition

1985-02-15

1986-07-15

Lilling, Herbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524377, 524493, 524503, C08K 336, C08K 506, C08K 904, D06M 1106

Patent

active

046007350

ABSTRACT:
A soil-repellent coating composition comprising silica, polyvinyl alcohol and a wetting agent in an aqueous carrier medium. The composition is characterized in that it, in addition to the aqueous carrier medium, contains 0.5-30% by weight of silica and 0.01-6% by weight of polyvinyl alcohol, and 0.05-2.5% by weight of a wetting agent, based on the total weight of the composition. The ready-made coating composition comprises 0.05-5% by weight of silica, 0.05-0.5% by weight of polyvinyl alcohol and 0.05-0.5% by weight of the wetting agent. The silica is present in the form of an alkali stabilized, preferably ammonium stabilized silica sol with an average particle size of 4-30 nm. The polyvinyl alcohol preferably has a hydrolysis degree of 85-100% and an average molecular weight of 15,000-100,000. The weight ratio of silica to polyvinyl alcohol is above 3:1 and preferably from 5:1 to 40:1. The wetting agent preferably is nonionic. The aqueous carrier medium of the composition may comprise a water-miscible, low-boiling solvent such as ethanol in an amount of up to 20% by weight.

REFERENCES:
patent: 3594113 (1971-07-01), Lifland et al.
patent: 3652379 (1972-03-01), White
patent: 3738957 (1973-08-01), Iler
patent: 4016129 (1977-04-01), Miyosawa
patent: 4069176 (1978-01-01), Tsubakimoto et al.
patent: 4383057 (1983-05-01), Yamamoto et al.
patent: 4478909 (1984-10-01), Taniguchi et al.
Derwent's Abstract, 38682B/20, SU 615-158.

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