Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-03-19
1996-10-29
Mulcahy, Peter D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
156330, 523411, 523412, 524217, 524523, 524525, C08K 320
Patent
active
055696864
ABSTRACT:
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.
REFERENCES:
patent: 4524107 (1985-06-01), Marchetti et al.
patent: 4839403 (1989-06-01), Sekmakas
patent: 5037700 (1991-09-01), Davis
Iwamasa Robert T.
Kan Charles S.
Lee Do I.
Makati Ashok C.
Mulcahy Peter D.
Roberts J. H.
The Dow Chemical Company
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