发明授权
- 专利标题: Process for preparing polybutylene terephthalate from pet scrap
- 专利标题(中): 从宠物废料制备聚对苯二甲酸丁二醇酯的方法
-
申请号: US930200申请日: 1992-08-17
-
公开(公告)号: US5266601A公开(公告)日: 1993-11-30
- 发明人: Manfred Kyber , Wolfgang Schmidt , Uwe Schollar
- 申请人: Manfred Kyber , Wolfgang Schmidt , Uwe Schollar
- 申请人地址: DEX Frankfurt
- 专利权人: Zimmer Aktiengesellschaft
- 当前专利权人: Zimmer Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt
- 优先权: DEX4220473 19920623
- 主分类号: C08G63/78
- IPC分类号: C08G63/78 ; C08J11/24
摘要:
Process for producing polybutylene terephthalate with less than 1.0 wt % units derived from ethylene glycol from polyethylene terephthalate scrap by diolysis and ester exchange with 1,4-butanediol and subsequent polycondensation.
公开/授权文献
信息查询