Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1981-04-21
1983-02-01
Lieberman, Allan
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528495, 528499, 528500, C08G 1004, C08J 300
Patent
active
043716750
ABSTRACT:
A modified aromatic hydrocarbon resin is prepared by reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, if desired, together with a saturated polybasic acid or an anhydride thereof, while making water or water and an aliphatic alcohol present in the reaction system and removing the formaldehyde formed by the reaction. The cured product has a good mechanical strength and a high resistance to water and alkalis.
REFERENCES:
patent: 3398107 (1968-08-01), Rowe et al.
patent: 4197378 (1980-04-01), Rudolphy et al.
Maeda Masayoshi
Miyamoto Akira
Yamagishi Yoshitaka
Lieberman Allan
Mitsubishi Gas Chemical Company Inc.
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