Methods of controlling migration of synthetic resins applied to

Details Methods of controlling migration of synthetic resins applied to Methods of controlling migration of synthetic resins applied to

1973-11-15

1976-02-03

Lusignan, Michael R.

Coating processes

Nonuniform coating

Paper or textile base

427302, 427303, 427323, 427324, 427326, B05D 500

Patent

active

039365425

ABSTRACT:
A method of applying a stable, aqueous, low viscosity resin composition to porous or absorbent materials and controlling the migration thereon which comprises: treating the porous or absorbent materials with an alkaline material to raise its pH above about 7 and give it an alkaline reserve potential; and applying to the porous or absorbent materials a stable, aqueous, acidic low viscosity resin composition having a viscosity of less than about 1,000 centipoises and an acidic pH less than about 7 and comprising from about 10% to about 60% by weight on a solids basis of a synthetic resin and from about 0.3% to about 8% by weight of a low viscosity, self-thickening resin having a polycarboxylate capability of converting the aqueous, acidic low viscosity resin composition to an aqueous, neutral or alkaline high viscosity resin composition having a viscosity of more than about 3,000 centipoises upon neutralization by conversion of the polycarboxylic function therein from the acid form which exists at an acidic pH less than about 7 to an alkali or ammonium carboxylate salt form which exists at about a neutral pH or an alkaline pH greater than about 7, whereby the resin composition substantially immediately thickens in place on the porous or absorbent material with a minimum of migration thereon.

REFERENCES:
patent: 3384502 (1968-05-01), Japs
patent: 3822143 (1974-07-01), Wheelock

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