Polymeric adhesion promoter and latexes; and polymeric adhesion promoter, epoxy resins and latexes are used to improve adherence between various substrates

• Main Authors: LEE; DO I, MAKATI; ASHOK C, IWAMASA; ROBERT T, KAN; CHARLES S
• Format: Patent
• Language: English
• Published: 29.10.1996
• Edition: 6
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

The adhesive of the present invention includes latexes with an adhesion promoter which is preferably polyamidoamine. The addition of the polyamidoamine improves the adhesive strength between substrates such as between two plastic films or between a plastic film and paperboard. The present invention also provides for an adhesive prepared from a latex which is neutralized with a particular base and a hydrophobic polyamidoamine having particular amine values and viscosity whereby the strength of the adhesive bond is increased in humid conditions. The present invention also provides for adhesives primarily for use in laminate structures which are exposed to highly humid conditions. The adhesive is a polymeric latex based system to which a polymeric adhesion promoter like polyamidoamine and an epoxy emulsion are added. The adhesive retains bond strength when exposed to humidity. The scope of the invention also includes laminate structures prepared with the present adhesive and other substrate layered structures which utilize the adhesive.