Method of preparing solid polyurethane elastomers专利检索- 异氰酸酯类或异硫氰酸酯类的聚合产物专利检索查询-专利查询网

Method of preparing solid polyurethane elastomers
申请号	US3645975D	申请日	1968-04-08	公开(公告)号	US3645975A	公开(公告)日	1972-02-29
申请人	WITCO CHEMICAL CORP;			发明人	BERNSTEIN CARL;
摘要	UNVULCANIZED, SOLID POLYURETHANE ELASTOMERS ARE PREPARED BY REACTING AN ADMIXTURE OF ACTIVE-HYDROGEN-CONTAINING LINEAR POLYETHER OR POLYESTER POLYMERS OR BRANCHED-CHAIN DERIVATIVES THEREOF, ORGANIC DIISOCYANATES, AND SUCH OTHER INGREDIENTS AS MAY BE REQUIRED, SUCH AS CHAIN-EXTENDERS, IN A THIN-WALLED, PREFORMED POLYETHYLENE REACTION CONTAINER AT A TEMPERATURE FROM ABOUT 125 TO 300 DEGREES F., THE REACTION MIXTURE ADVANTAGEOUSLY BEING PROTECTED FROM CONTACT WITH THE ATMOSPHERE UNTIL A SOLID POLYMER IS FORMED. THE PLASTIC REACTION VESSEL CAN BE READILY CUTY AND STRIPPED FROM THE SURFACE OF THE SOLID ELASTOMER OR THE SOLID ELASTOMER CAN BE STORED OR SHIPPED WHILE STILL ENCASED IN THE PLASTIC REACTION VESSEL.
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