| 摘要 |
1517943 Tackifiers for rubber ROHM & HAAS CO 20 June 1975 [15 July 1974] 2755/78 Divided out of 1517942 Heading C3R A tackifier which can be used in natural rubber and/or synthetic-rubber comprises the acid-catalysed reaction product of (a) 0À7 to 1À3 moles of an aldehyde, with (b) 0À5 to 0À95 mole of one or more phenols, more than 50% weight of which are mono-substituted, and (c) 0À05 to 0À5 mole of a cyclo-aliphatic polyamine containing at least two primary amino groups. Reactant (a) is preferably formaldehyde but may be a C1-C4-alkyl aldehyde. Reactant (b) is preferably phenol mono-substituted in the ortho or para position, the substituent preferably being an alkyl, alkoxy or alkenyl radical. Suitable polyamines (c) are 1,8-p-menthane diamine and 1,3-bis(aminoethyl) cyclohexane. In the Example a tackifier is prepared by reacting p-dodecyl phenol, 1,8-p-menthane diamine and aqueous formaldehyde in the presence of oxalic acid as catalyst.
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