Densifiable and re-expandable polyurethane foam and manufacture thereof专利检索- 用于制备形状记忆高分子的组合物专利检索查询-专利查询网

Densifiable and re-expandable polyurethane foam and manufacture thereof
申请号	JP16043991	申请日	1991-07-01	公开(公告)号	JPH04232730A	公开(公告)日	1992-08-21
申请人	Dow Chem Co:The;			发明人	RONARUDO EMU HAARINTON; ROBAATO BII TAANAA; ROBAATO EMU HAANDEN;
摘要	PURPOSE: To density a polyurethane foam for transportation and other purposes by heating the polyurethane foam with a specific glass transition temperature at a higher temperature than Tg to density the heated foam and cooling the densified foam at a lower temperature than Tg. CONSTITUTION: This cooled foam is kept in a densified state until it is reheated at a higher temperature than Tg and resumes its original dimensions through re-expanding the foam. COPYRIGHT: (C)1992,JPO
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