发明名称 |
Increased throughput in melt fabrication and foaming of polyester |
摘要 |
Disclosed is a process for obtaining polyester articles, including foamed articles, containing low levels of extractable branching agent. The process comprises: (1) forming a molten mixture comprising (i) a major amount of a first resin composition comprising polyester and from 0 up to about 1 wt. % of a compound capable of branching the polyester, and (ii) a minor amount of a second polyester resin composition comprising at least about 50 wt. % polyester resin and greater than about 2 wt. % of a compound capable of branching the polyester, wherein the relative amounts of (i) and (ii) are such that said molten mixture comprises from about 0.1 wt. % to about 1 wt. % of said branching compound; (2) adding a blowing agent to the molten mixture; and (3) extruding the resultant mixture to obtain a foam. The invention is also directed to the second composition used in the above process, and foamed polyester articles obtained from the process.
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申请公布号 |
US5340846(A) |
申请公布日期 |
1994.08.23 |
申请号 |
US19930169594 |
申请日期 |
1993.12.17 |
申请人 |
AMOCO CORPORATION |
发明人 |
ROTTER, GEORGE E.;MELQUIST, JOHN L.;CHIANG, WEILONG;TSAI, BOH C.;KELLY, JOHN J. |
分类号 |
A47J27/00;C08G63/91;C08J9/00;C08J9/04;C08K5/09;C08L67/00;C08L67/02;(IPC1-7):C08J9/00 |
主分类号 |
A47J27/00 |
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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