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
2011-03-22
2011-03-22
Wu, David (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...
C525S173000, C525S174000, C525S419000, C525S444000, C525S445000, C525S448000, C525S450000
Reexamination Certificate
active
07910657
ABSTRACT:
A process comprises depolymerizing, with 1,4-butane diol, a first polymer comprising a polyethylene terephthalate component in the presence of at least one second polymer selected from the group consisting of polyvinyl chlorides, polyvinylidene chlorides, polyamides, polylactic acid, and combinations thereof to produce a molten mixture; and polymerizing the molten mixture under conditions sufficient to form a modified polybutylene terephthalate copolymer. The modified PBT comprises (a) at least one polyethylene terephthalate component residue, and (b) a member selected from the group consisting of (i) the at least one second polymer selected from the group consisting of polyvinyl chlorides, polyvinylidene chlorides, polyamides, polylactic acid, and combinations thereof; (ii) the at least one residue derived from the second polymer; and (iii) combinations thereof.
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Cantor & Colburn LLP
Jones, Jr. Robert
Sabic Innovative Plastics IP B.V.
Wu David
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