公开(公告)号：EP0636158A1

公开(公告)日：1995-02-01

申请号：EP94907907.0

申请日：1994-01-28

申请人： AMOCO CORPORATION

发明人： ROTTER, George, Edmund ,  MELQUIST, John, Leslie ,  CHIANG, Weilong ,  TSAI, Boh, Chang ,  KELLY, John, Joseph

IPC分类号： A47J27 ,  C08G63 ,  C08J9 ,  C08K5 ,  C08L67

CPC分类号： C08J9/0023 ,  C08J9/00 ,  C08J9/0066 ,  C08J2367/00 ,  C08J2367/02 ,  C08L67/02 ,  C08L2666/18

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.

公开(公告)号：EP0636158B1

公开(公告)日：1999-03-31

申请号：EP94907907.3

申请日：1994-01-28

申请人： AMOCO CORPORATION

发明人： ROTTER, George, Edmund ,  MELQUIST, John, Leslie ,  CHIANG, Weilong ,  TSAI, Boh, Chang ,  KELLY, John, Joseph

IPC分类号： C08J9/00 ,  C08K5/15 ,  C08L67/02

CPC分类号： C08J9/0023 ,  C08J9/00 ,  C08J9/0066 ,  C08J2367/00 ,  C08J2367/02 ,  C08L67/02 ,  C08L2666/18

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.