发明名称 |
High molecular weight ortho cresol-novolak resins and process for the preparation thereof using alcoholic or acidic organic solvents |
摘要 |
Orthocresol or a mixture of orthocresol and paracresol and an aldehyde compound or a derivative thereof are subjected to polycondensation in a solvent selected from an aliphatic alcohol having 3 to 12 carbon atoms, a glycol ether having 3 to 6 carbon atoms, benzyl alcohol and an aliphatic carboxylic acid having 2 to 6 carbon atoms, in the presence of an acid catalyst, to obtain linear and high molecular weight orthocresol-novolak resins or orthocresol/paracresol random copolymerized novolak resins which have a high softening point of 145 DEG C. or higher and a high number average molecular weight of 1500 or more and which are highly soluble in alcohols and ketones and are highly compatible with resins.
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申请公布号 |
US4876324(A) |
申请公布日期 |
1989.10.24 |
申请号 |
US19870049335 |
申请日期 |
1987.05.13 |
申请人 |
MITSUBISHI PETROCHEMICAL CO., LTD. |
发明人 |
NAKANO, YOSHITOMO;KADA, MASUMI |
分类号 |
C08G8/00;C08G8/04;C08G8/10;C08G8/12;C08L61/06;C08L63/00 |
主分类号 |
C08G8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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