Impregnation and primer coating of absorptive substrates...

Details Impregnation and primer coating of absorptive substrates... Impregnation and primer coating of absorptive substrates...

B - Operations, Transporting

32

B

117/183

B32B 13/12 (2006.01) C09D 5/00 (2006.01)

Patent

CA 1053995

IMPREGNATION AND PRIMER COATING OF ABSORPTIVE SUBSTRATES WITH PLASTICS DISPERSIONS Abstract of the disclosure: Absorptive substrates, such as asbestos cement, concrete plaster work, can be impregnated to lock the pores and to so- lidify the substrate, especially old and weathered plaster work , with aqueous plastics dispersions, if dispersions are used which have an average particle size of about 0.02 to at most 0.1µm, and preferably from 0.02 to 0.06 µm. As opposed to con- ventional dispersions with larger particle sizes, the penetra- tion of dispersions according to the invention reaches the same values as that of the solvent-based impregnating and priming compositions hitherto used. Aqueous dispersions are easier to handle and permit relatively high solids contents at a moderate vis- cosity.

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