Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1982-04-30
1983-10-18
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
525400, 525401, 528247, 528495, 528499, 528500, C08G 228
Patent
active
044106904
ABSTRACT:
A process for the preparation of a modified aromatic hydrocarbon resin which comprises reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, together with a saturated polybasic acid or an anhydride thereof if necessary, in the presence or absence of water, while introducing steam into the reaction system to remove by-produced formaldehyde out of the reaction system, and reacting the formed reaction product with at least one dihydroxy compound selected from the group consisting of (A) a glycol and (B) a hydroxy-terminated oligomer obtained by reacting a glycol with an unsaturated polybasic acid or an anhydride thereof; the cured product of the modified aromatic hydrocarbon resin being excellent in mechanical strength and resistance to water and alkalis.
REFERENCES:
patent: 2806834 (1957-09-01), Nischk et al.
patent: 2985615 (1961-05-01), Tunteler et al.
patent: 3481892 (1969-12-01), Huang et al.
patent: 3539534 (1970-11-01), Manganaro et al.
Mitui Yoshimasa
Miyamoto Akira
Nishimura Toshiaki
Sato Katsuo
Yamagishi Yoshitaka
Mitsubishi Gas Chemical Co. Inc.
Phynes Lucille M.
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