发明授权
US07799836B2 Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
有权
从聚对苯二甲酸乙二醇酯（PET）制造聚对苯二甲酸丁二醇酯（PBT）的方法
- 专利标题： Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
- 专利标题（中）： 从聚对苯二甲酸乙二醇酯（PET）制造聚对苯二甲酸丁二醇酯（PBT）的方法
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申请号： US11626674申请日： 2007-01-24
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公开(公告)号： US07799836B2公开(公告)日： 2010-09-21
- 发明人: Parminder Agarwal , Kristen Cohoon , Sandeep Dhawan , Robert Russell Gallucci , Ganesh Kannan , Kenneth Frederick Miller , Deepak Ramaraju , Gomatam Raghavan Ravi , Dhaval Shah
- 申请人： Parminder Agarwal , Kristen Cohoon , Sandeep Dhawan , Robert Russell Gallucci , Ganesh Kannan , Kenneth Frederick Miller , Deepak Ramaraju , Gomatam Raghavan Ravi , Dhaval Shah
- 申请人地址： NL
- 专利权人： Sabic Innovative Plastics IP B.V.
- 当前专利权人： Sabic Innovative Plastics IP B.V.
- 当前专利权人地址： NL
- 代理机构： Cantor Colburn LLP
- 代理商 Diderico van Eyl
- 主分类号： C08J11/04
- IPC分类号： C08J11/04
摘要：
The invention relates to a process for making modified polybutylene terephthalate random copolymers from a polyethylene terephthalate component. The invention relates to a three step process in which a diol component selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof reacts with a polyethylene terephthalate component under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; and where the first molten mixture is combined with 1,4-butanediol under conditions that create a second molten mixture that is subsequently placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers. The invention also relates to compositions made from the process.