发明名称 |
Methods of depolymerizing terephthalate polyesters |
摘要 |
A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.
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申请公布号 |
US8541477(B2) |
申请公布日期 |
2013.09.24 |
申请号 |
US201113040550 |
申请日期 |
2011.03.04 |
申请人 |
ALABDULRAHMAN ABDULLAH M;ALMEGREN HAMID A;ALSEWAILEM FARES D;BROCK PHILLIP JOE;COADY DANIEL JOSEPH;FUKUSHIMA KAZUKI;HEDRICK JAMES LUPTON;HORN HANS WERNER;RICE JULIA ELIZABETH;INTERNATIONAL BUSINESS MACHINES CORPORATION;KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY |
发明人 |
ALABDULRAHMAN ABDULLAH M;ALMEGREN HAMID A;ALSEWAILEM FARES D;BROCK PHILLIP JOE;COADY DANIEL JOSEPH;FUKUSHIMA KAZUKI;HEDRICK JAMES LUPTON;HORN HANS WERNER;RICE JULIA ELIZABETH |
分类号 |
C08J11/04 |
主分类号 |
C08J11/04 |
代理机构 |
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代理人 |
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