Process for coating porous webs

Details Process for coating porous webs Process for coating porous webs

1980-03-24

1982-01-26

Lusignan, Michael R.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

260 296TA, 427381, 427382, 427386, 427389, 4273899, 427391, 427392, 4273934, 428510, 428514, B32B 2700, B05D 302, B32B 2308

Patent

active

043129145

ABSTRACT:
The subject of the invention is a process for coating porous webs, wherein an aqueous, spreadable composition which has a pH value of 3 to 6 and contains at least (A) an emulsion copolymer comprising (a) an alkyl acrylate, (b) acrylonitrile, (c) an ethylenically unsaturated aliphatic carboxylic acid and/or the unsubstituted or methylated N-methylolamide of these carboxylic acids and (d) optionally another copolymerizable unsaturated compound which is free from acid groups, (B) an organic solvent which is insoluble to at most slightly soluble in water and has a boiling point between 50.degree. and 160.degree. C. and a molecular weight of 50 to 160, and (C), if desired, a polyfunctional crosslinking aminoplast precondensate or epoxide, is applied to the web, dried and then cured, the web also being impregnated if desired, either before or after coating, but prior to curing, with an agent for imparting hydrophobic and/or oleophobic properties, and dried. The coatings are stable to drycleaning.

REFERENCES:
patent: 2753318 (1956-07-01), Maeder
patent: 3020178 (1962-02-01), Sweeney et al.
patent: 3081193 (1963-03-01), Stasse
patent: 3223663 (1965-12-01), Altobelli et al.
patent: 3503918 (1970-03-01), Le Sota et al.
patent: 3519459 (1970-07-01), Hofmann et al.
patent: 3537883 (1970-11-01), Shaw et al.
patent: 3732184 (1973-05-01), Lindemann et al.
patent: 3825431 (1974-07-01), Uhl et al.

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