Process for forming moisture-permeable waterproof coating on fab

Details Process for forming moisture-permeable waterproof coating on fab Process for forming moisture-permeable waterproof coating on fab

1985-12-06

1987-09-22

Lawrence, Evan K.

Coating processes

Foraminous product produced

Microporous coating

427338, 427339, 427342, 435263, B05D 302, B05D 310, B05D 500

Patent

active

046954848

ABSTRACT:
A moisture-permeable waterproof coating is formed by coating a fabric with a water-based coating composition containing a film forming polymer and a water-soluble polymer in a proportion of 5 to 70% based on total solids, drying or heating the fabric to form a film thereon; and then treating the resulting film with an aqueous solution of an enzyme which selectively degrades the water-soluble polymer, thereby enzymatically degrading the water-soluble polymer and extracting the degraded water soluble polymer from the film, whereby the film on the fabric is rendered microporous.

REFERENCES:
patent: 2673825 (1954-03-01), Biefeld et al.

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