发明申请
- 专利标题: Method of Making Polybutylene Terephthalate and Compositions and Articles Comprising the Same
- 专利标题(中): 制造聚对苯二甲酸丁二酯及其组合物及其制品的方法
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申请号: US12114172申请日: 2008-05-02
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公开(公告)号: US20090275698A1公开(公告)日: 2009-11-05
- 发明人: Gomatam Raghavan Ravi , Deepak Ramaraju , Srinivasan Krishnaswami
- 申请人: Gomatam Raghavan Ravi , Deepak Ramaraju , Srinivasan Krishnaswami
- 主分类号: C08G63/91
- IPC分类号: C08G63/91 ; C08L67/03
摘要:
A process for making modified polybutylene terephthalate random copolymers from a polyethylene terephthalate component includes reacting an oligomeric diol component selected from the group consisting of bis(hydroxybutyl)terephthalate, bis(hydroxybutyl)isophthalate, hydroxybutyl-hydroxyethyl terephthalate, and combinations thereof to a reactor; (i) a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers with (ii) a diol component selected from the group consisting of 1,4-butanediol, ethylene glycol, propylene glycol, and combinations thereof, in the reactor under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; combining the first molten mixture is combined with 1,4-butanediol under conditions to form a second molten mixture; and placing the second molten mixture under conditions sufficient to produce the modified polybutylene terephthalate random copolymers. Also described are compositions and articles made from the process.
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