| 摘要 |
PURPOSE:To stick vulcanized rubber to a reinforcing material in a longer scorch ing time and under stable workability and improved adhesion by using vulcanizable mixture composed of specific cocondensation resin and polyvalent methylolamine. CONSTITUTION:Bonding is performed by employing materials (A) and (B); wherein (A)(i) is: Resol type initial condensation product obtained by reacting under the presence of alkali catalyst, one or more kinds of univalent phenol group of (i) FormulaI(wherein: R1, R2 are alkyl of H, C1-12, and aryl of C6-12 etc.) and formaldehyde or acetaldehyde; and (ii) co-condensation resin obtained by reacting one or more of compounds (such as resorcinol) of Formula II (wherein: X represents OH, NH2 etc.), so as to make the mol ratio of (i) and (ii) become 75/25-25/75; while (B) is vulcanizable mixture of 1-20pts.wt. (to 100pts. of rubber) containing one or more kinds of polyvalent methyrolmelamine derivatives (such as hexamethyrolmelamine, hexamethylether). |
