Adhesive based on a starch and acrylamide graft copolymer

Details Adhesive based on a starch and acrylamide graft copolymer Adhesive based on a starch and acrylamide graft copolymer

1980-10-27

1982-03-30

Pianalto, Bernard D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

4284744, 428532, 428702, 524846, 527314, B32B 2700

Patent

active

043224725

ABSTRACT:
An aqueous adhesive composition containing a graft copolymerized product of low amylose starch and acrylamide with rheological and remoistening adhesive properties suitable for coating low basis weight kraft paper on transfer roll coating equipment to make remoistenable sealing tapes. The desired properties of the adhesive composition are obtained by a controlled graft copolymerization together with a simultaneous gelatinization of the starch at temperatures below 210.degree. F. and with the essential addition of cupric or ferric ions before initiating the reaction. The resulting coatable adhesive has a comparatively low viscosity as required for transfer roll coating while retaining the improved adhesion properties of the acrylamide.

REFERENCES:
patent: 3407084 (1968-10-01), Heywood
patent: 3425968 (1969-02-01), Reiling
patent: 3574153 (1971-04-01), Sirota
patent: 3640925 (1972-02-01), Touzinsky
patent: 4098916 (1978-07-01), Crawford

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