PROCESS FOR PREPARATION OF ISOPROPENYLPHENOL

    公开(公告)号:KR820002005B1

    公开(公告)日:1982-10-24

    申请号:KR790002918

    申请日:1979-08-27

    Abstract: Isopropenyl phenol is produced by the thermal decomposition of its oligomers. Process comprises continuously feeding the oligomers into an inert organic reaction medium; heating to 150-250≦̸C at 10-100 mm Hg at a rate such that the concn. of oligomers is not more than 30 wt.% and continuously distilling off the prod. and recovering it. The medium is a high boiling organic solvent of melting or softening point not more than 150≦̸C and a lower vapour pressure than the prod. at the oligomer decomposition temp. Prods. have reduced contents of impurities.

    CLEAVING DIHYDROXDIPHENYL ALKANES

    公开(公告)号:AU526065B2

    公开(公告)日:1982-12-16

    申请号:AU4961979

    申请日:1979-08-06

    Abstract: A novel process for producing alkenyl phenols, which comprises continuously feeding a dihydroxydiphenyl alkane such as 2,2-(4,4'-dihydroxydiphenyl)propane, 2,2-(4,4'-dihydroxy-3,3'-dimethyldiphenyl)propane, 2,2-(4,4'-dihydroxydiphenyl)butane, 2,2-(4,4'-dihydroxydiphenyl)-4-methylpentane, 1,1,1-(4,4'-dihydroxytriphenyl)ethane and 1,1-(4,4'-dihydroxydiphenyl)cyclohexane into a high-boiling inert organic reaction medium such as an alkylnaphthalene containing a basic catalyst and heated at 150 DEG to 250 DEG C. under 10 to 100 mmHg while maintaining the concentration of the dihydroxydiphenyl alkane in the reaction medium at not more than 30% by weight, thereby cleaving it in the reaction medium; and continuously distilling off the cleavage product out of the reaction system and recovering it. This process can afford the corresponding highly pure alkenyl phenol as a monomer and/or its polymer almost quantitatively.

    PROCESS FOR PRODUCING MODIFIED PHENOLIC RESIN

    公开(公告)号:CA1120187A

    公开(公告)日:1982-03-16

    申请号:CA308710

    申请日:1978-08-03

    Abstract: A drying oil such as isomerised 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 isopropenylphenyl and/or oligomers thereof, preferably 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 Or an acid at a tmeperature 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 the double bonds of the oil are retained. 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 rosin. This phenolic resin is useful for making a phenolic laminate with improved flexibility punching quality and water resistance.

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