Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
- 申请公布号：
- US7902263(B2)
- 申请号：
- US20070626684
- 申请日期：
- 2007.01.24
- 申请公布日期：
- 2011.03.08
- 申请人：
- SABIC INNOVATIVE PLASTICS IP B.V.
- 发明人：
- AGARWAL PARMINDER;COHOON KRISTEN;DHAWAN SANDEEP;GALLUCCI ROBERT RUSSELL;KANNAN GANESH;MILLER KENNETH FREDERICK;SHAH DHAVAL
- 分类号：
- C08J11/04
- 主分类号：
- 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.
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