Gaf Chemicals Corporation

Isp Investments Inc.

Balgopal Gangadharan

Rama K Haldar

Ratan K Chaudhuri

Robert B Login

Mohammed Tazi

Krystyna Plochocka

Yoon T Kwak

William E Prosise

According to this invention, there is provided a denture adhesive which is a mixed partial salt of a copolymer of maleic anhydride and acrylic acid (or methacrylic acid), optionally including a C.sub.1 -C.sub.4 alkyl vinyl ether, having a weight average molecular weight of about 30,000 to 400,000, preferably about 50,000 to 350,000. The copolymer comprises about 10 to 70 mole percent, preferably 20 to 60 mole percent, of maleic anhydride, about 30 to 90 mole percent, preferably 40 to 80 percent, of acrylic acid (or methacrylic acid), and 0 to 25 mole percent of a C.sub.1 -C.sub.4 alkyl vinyl ether.

Denture adhesive

This invention relates to superior bioadhesive compositions having time extended adhesive properties comprising a non-toxic carrier and a polymer having between about 45 and about 70 weight % of units having the structure ##STR1## between about 50 and about 30 weight % of units having the structure ##STR2## and 2 to 7 weight % of an amine salt containing a lactam functionally derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxy or --N lactam having from 3 to 6 carbon atoms; R.sub.1 is C.sub.1 to C.sub.6 alkylene and R.sub.2 is C.sub.2 to C.sub.4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size. The invention also relates to the method of synthesizing and using the above composition.

Bioadhesive composition

This invention relates to superior bioadhesive compositions having time extended adhesive properties comprising a non-toxic carrier and a polymer having between about 45 and about 70 weight % of units having the structure ##STR1## between about 50 and about 30 weight % of units having the structure ##STR2## and 2 and 7 weight % of an amine salt containing a lactam functionality derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxyl or --N lactam having from 3 to 6 carbon atoms; R.sub.1 is C.sub.1 to C.sub.6 alkylene and R.sub.2 is C.sub.2 to C.sub.4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size. The invention also relates to the method of synthesizing and using the above composition.

According to this invention, there is provided a denture adhesive which is a mixed partial salt of a terpolymer of maleic anhydride, (MA) a C.sub.1 -C.sub.4 alkyl vinyl ether (AVE) and isobutylene (IB) vinyl ether, having a weight average molecular weight of about 30,000 to 400,000, preferably about 50,000 to 350,000. The terpolymer has its components in the molar ratio of MA:AVE:IB of about 1:0.4-0.9:0.1-0.6, preferably about 1:0.5-0.8-0.2-0.5.

A composition containing an adhesive suitable for affixing dentures or ostomy devices to a mucous membrane, which adhesive is a mixture composed of

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Caldwell, NJ, United States of America

Balgopal Gangadharan