| 摘要 |
1,129,288. Pneumatic tyres. MONTECATINI SOCIETA GENERALE PER L'INDUSTRIA MINERARIA E CHIMICA. 26 Jan., 1966 [29 Jan., 1965], No. 3508/66. Heading B7C. [Also in Division B5] A process for treading or retreading a tyre carcass of unsaturated rubber comprising natural rubber, polybutadiene or styrene-butadiene rubber with a tread of a saturated amorphous ethylene-alpha olefine copolymer comprises vulcanizing the assembly at between 110‹ and 230‹ C., both carcass and tread containing vulcanizing agents and reinforcing fillers and the tread containing as adhesion promoter a polymeric substance of molecular weight between 200 and 50,000 which is fluid at the vulcanizing temperature and co-vulcanizable with the two elastomers by action of the respective vulcanizing agents contained therein. Conven. tional vulcanizing agents and fillers are listed. Specified adhesion promoters are polyethylene glycol, natural rubber depolymerized to the liquid state, liquid polybutadiene, phenol-aldehyde and phenol-acetylene resins, polymers of esters of resinic acid with polyhydroxy alcohols, aromatic petroleum resins, coumarone-indene resins and cobalt and zinc resinate. Specified alpha olefines are propylene and butene-1. |
