发明名称 |
Aromatic polyester polycarbonate polyols derived from polyethylene terephthalate residues |
摘要 |
A novel class of aromatic polyester polycarbonate polyols is described. The polycarbonate polyols are made by reacting an alkylene carbonate with a residue from polyethylene terephthalate (PET) manufacture over a polycarbonate formation catalyst such as potassium stannate. Use of a PET waste stream helps keep the cost of the polycarbonate polyols low. These materials can be used to replace the polyol portion in the preparation of polyisocyanurate foams.
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申请公布号 |
US4465793(A) |
申请公布日期 |
1984.08.14 |
申请号 |
US19830491695 |
申请日期 |
1983.05.05 |
申请人 |
TEXACO INC. |
发明人 |
BRENNAN, MICHAEL E.;SPERANZA, GEORGE P. |
分类号 |
C08G18/42;C08G18/44;C08G63/64;(IPC1-7):C08G18/14 |
主分类号 |
C08G18/42 |
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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