Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-02-22
2010-06-29
Rábago, Roberto (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S331200, C525S333900, C525S343000, C525S346000, C525S330700, C525S349000, C525S350000
Reexamination Certificate
active
07745543
ABSTRACT:
The instant invention is an improved cure system composition and a method for curing chlorinated elastomer compositions. The cure system composition includes a polymercapto crosslinking agent; an inorganic base; and an onium salt. The onium salt has a formula selected from the group consisting ofwherein Z is a nitrogen or phosphorous atom, R1to R4are independently alkyl or aryl groups containing between 2 and 8 carbon atoms, and the total number of carbon atoms on R1-R4is between 10 and 14; wherein R5and R6are alkyl groups containing between 1 and 8 carbon atoms, and the total number of carbon atoms on R5-R6being between 5 and 9; and wherein X is an anion. The method for curing a chlorinated elastomer composition according to instant invention includes the following steps: (1) providing a chlorinated elastomer composition; (2) providing a cure system composition as described above; (3) contacting said chlorinated elastomer composition with said cure system composition; and (4) thereby curing said chlorinated elastomer composition.
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Laakso, Jr. Raymond L.
Marchand Gary R.
Dow Global Technologies Inc.
Rábago Roberto
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