Process of reclaiming linear terephthalate polyester专利检索- 废料的回收或加工专利检索查询-专利查询网

Process of reclaiming linear terephthalate polyester
申请号	US14523961	申请日	1961-10-16	公开(公告)号	US3222299A	公开(公告)日	1965-12-07
申请人	DU PONT;			发明人	MACDOWELL JOHN T;
摘要
权利要求	1. THE PROCESS OF RECLAIMING SCRAP LINEAR TEREPHTHALATE POLYESTER WHICH COMPRISES HEATING THE SAID SCRAP WITH A GLYCOL, MIXING THE RESULTING DIGLYCOL TEREPHTHALATE ESTER WITH A DIGLYCOL TEREPHTHALATE ESTER PREPARED FROM PURIFIED STARTING MATERIALS AND THEREAFTER POLYMERIZING THE MIXTURE UNDER CONDITIONS OF REDUCED PRESSURE AND ELEVATED TEMPERATURE IN THE PRESENCE OF A MINOR AMOUNT OF A METAL SALT OF AN AROMATIC ESTER-FORMING COMPOUND HAVING THE FORMULA
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