发明名称 |
Process and device for recycling rigid polyester |
摘要 |
<p>A method to work-up waste material of polyethylene terephthalate (PET) in solid form and having a high initial viscosity for multivalent reuse and to recondense it to a high viscosity. The method includes the chemical regeneration and conversion of the recyclate in a mixture with a primary component in continuous and batchwise systems to form a homogenous product. The material to be reprocessed is heated in a stream of gas, crystallized, and dried. The solid-phase condensation is concluded in a stream of gas at high temperature. A transformation process is carried out by mixing the recycling material after treatment with a second component containing hydroxyl end groups.</p> |
申请公布号 |
EP0633108(B1) |
申请公布日期 |
1998.06.10 |
申请号 |
EP19940105179 |
申请日期 |
1994.03.31 |
申请人 |
WILTZER, KARL-HEINZ;LAUSMANN, PETER |
发明人 |
UNGER,REINHARD DR.;SIECKMANN, HARTMUT;WILTZER,KARL-HEINZ |
分类号 |
C08G63/78;C08J11/22;(IPC1-7):B29B17/00;B29B13/02;B29B13/06;C08G63/80 |
主分类号 |
C08G63/78 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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