发明授权
US07902263B2 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: US11626684申请日: 2007-01-24
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公开(公告)号: US07902263B2公开(公告)日: 2011-03-08
- 发明人: Parminder Agarwal , Kristen Cohoon , Sandeep Dhawan , Robert Russell Gallucci , Ganesh Kannan , Kenneth Frederick Miller , Dhaval Shah
- 申请人: Parminder Agarwal , Kristen Cohoon , Sandeep Dhawan , Robert Russell Gallucci , Ganesh Kannan , Kenneth Frederick Miller , 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
- 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. In one embodiment, the invention relates to a two step process in which a 1,4-butane diol component reacts with a polyethylene terephthalate component under conditions that depolymerize the polyethylene terephthalate component into a molten mixture and the molten mixture is placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers. In another embodiment, 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-butane diol 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 processes of the invention.