Process for producing modified phenolic resin

Details Process for producing modified phenolic resin Process for producing modified phenolic resin

1978-07-25

1979-06-19

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 19R, 260 25, 2604105, C08G 832, C08G 834

Patent

active

041586506

ABSTRACT:
A drying oil such as isomerized linseed oil, dehydrated castor oil or the like oil which has an iodine value of more than 140 and a content of conjugated double bonds of less than 50% is reacted with isopropenylphenol and/or oligomers thereof in an amount, by weight, of 0.1-2 times as great as that of the drying oil in the presence of a small amount of an acid at a temperature of 65-150.degree. C. for 0.5-3 hours. By the reaction, isopropenylphenol and/or its oligomers are introduced to the drying oil while leaving the double bonds of the oil as they are without disappearance. The thus introduced oil is further reacted with a phenol or phenols under strongly acidic conditions to introduce the phenols thereto. The drying oil which has been introduced with the isopropenylphenol and/or its oligomers and also with the phenols is mixed with a phenol or phenols and then reacted with formaldehyde to give a modified phenolic resin. This phenolic resin is useful for making a phenolic laminate with improved flexibility, punching quality and water proof.

REFERENCES:
patent: 2587578 (1952-03-01), Jones
patent: 2985600 (1961-05-01), Barr et al.
patent: 3048508 (1962-08-01), Boiney et al.
patent: 3632785 (1972-01-01), Bornstein
patent: 3763104 (1963-10-01), Buchanan
Chemical Abstracts, vol. 82, No. 8, Feb. 24, 1975, p. 44016g.

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