Polyurethane elastomers with combination of curatives

Details Polyurethane elastomers with combination of curatives Polyurethane elastomers with combination of curatives

2006-04-25

2006-04-25

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...

C528S059000, C528S028000, C528S085000, C428S036900, C428S906000, C399S279000

Reexamination Certificate

active

07034097

ABSTRACT:
Polyurethane elastomers are formed from first and second graft curatives, each graft curative having a molecular weight of at least about 800, wherein the first and second graft curatives are substantially immiscible with one another, and wherein the polyurethane elastomer exhibits a hardness of less than about 40 Shore A according to ASTM D2240-86 and a compression set of less than about 8% according to ASTM D395-89, method B, at a temperature of about 70° C. for about 22 hours. Rolls are manufactured using such polyurethane elastomers, particularly rolls that are suitable for use in image forming devices, such as electrophotographic print applications.

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