Temporary wet strength resins

US4603176A · kind A · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• David W. Bjorkquist · Wyoming, US
• William W. Schmidt · Houston, US

Key dates

• Filing date: Jun 25, 1985
• Grant date: Jul 29, 1986
• Expiry date: Jun 25, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Temporary wet strength resin polymers having the formula ##STR1## wherein A is a polar, non-nucleophilic unit which does not cause said resin polymer to become water-insoluble; B is a hydrophilic, cationic unit which inparts a positive charge to the resin polymer; each R is H, C.sub.1 -C.sub.4 alkyl or halogen; PA1 wherein the mole percent of W is from about 5% to about 95%; the mole percent of X is from about 3% to about 65%; the mole percent of Y is from about 1% to about 20%; and the mole percent of Z is from about 1% to about 10%; said resin polymer having a molecular weight of from about 5,000 to about 200,000. These resins, when incorporated into paper products provide good dry and initial wet tensile strength together with excellent wet tensile decay.