Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Reexamination Certificate
2006-10-03
2006-10-03
Gorr, Rachel (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
C528S083000, C528S905000
Reexamination Certificate
active
07115697
ABSTRACT:
An adhesive composition comprising a two-component system comprisingA) at least one polyester urethane containing at least two isocyanate groups, which polyester urethane may be obtained by reaction of one or more polyesters 1 with aliphatic diisocyanates and reaction with one or more polyesters 2, wherein polyester 1 exhibits a number average molecular weight Mn in the range from 3,000 to 7,000 g/mol and polyester 2 exhibits a number average molecular weight Mn in the range from 700 to 2,000 g/mol andB) one or more branched polyesters with a number average molecular weight Mn in the range from 1,000 to 3,500 g/moland optionally one or more conventional additives;the present invention provides a polyurethane-based adhesive composition which is suitable for the production of laminates for sterilizable packaging and exhibits a low residual content of highly volatile diisocyanates. The adhesive according to the invention ensures that no or only slight delamination of the film composites occurs even at elevated temperatures.
REFERENCES:
patent: 6503981 (2003-01-01), Hellwig et al.
patent: WO099/24486 (1999-05-01), None
de Jong Erik
Kleineberg Olaf
Pfeiffer Heinz-Peter
Schreiber Peter
Temeltas Engin
E. I. du Pont de Nemours and Company
Gorr Rachel
Sebree Churrea J.
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