| 摘要 |
<p>A reinforced, resinous polymer is prepared by incorporating into a resinifiable polymer of a C4-C6 diolefine a reinforcing material which has been coated with a polymer of a C4-C6 diolefine and hardening the polymer in the presence of a peroxide catalyst. The reinforcing material such as glass fibres is coated with an aqueous emulsion or a solution containing less than 10 parts by weight of an oily polymer of butadiene, isoprene, dimethylbutadiene, piperylene or methyl pentadiene per 100 parts of water or solvent. The polymer may also contain another monomer such as styrene, methyl or dimethyl styrenes, acrylonitrile or methyl vinyl ketone and is formed in the presence of a peroxide catalyst or metallic sodium. Preferred is a butadiene (75-100 parts)/styrene (25-0 parts) polymer prepared at 25-105 DEG C. with 0.5-5 parts of sodium and 100-500 parts of a hydrocarbon diluent, 10-45 parts of a C4-C8 aliphatic or cyclic ether, particularly dioxane or diethyl ether, and 5-35% by weight, based on sodium, of an alcohol such as methanol, isopropanol or amyl alcohol. If used in emulsion 2-12 parts per 100 parts of polymer, of a non-ionic emulsifier is used, e.g. a polyoxyethylated octyl or nonyl phenol containing 8-10 ethylene oxide units. If applied in solution, suitable solvents are hexane, heptane, esters or ethers. A peroxide catalyst may also be added, e.g. 0-10% based on the polymer oil of dicumyl or ditertiary butyl peroxide. Suitably the glass fibres should have 0.25-11.5% of polymer incorporated thereon. The glass is then dried at 60-300 DEG F. for one minute to ten hours. Standard halo-silane coatings may be applied beforehand or simultaneously with the polymer. The glass is then added to a polymer oil which is preferably the same as that indicated above. Preferably 0-50% based on the mixture, of a cross-linking agent is added, e.g. styrene, vinyl toluene, halo styrenes, vinyl naphthalene, alkyl acrylates and methacrylates or diallyl phthalate. The catalyst is added in amounts of 0.2-10% and may be dicumyl or ditertiary butyl peroxide. The hardening is effected at 250-400 DEG F. for five minutes to two hours at 0-1500 p.s.i.g. and may be subjected to a post-cure at 290-350 DEG F. for 1-24 hours.</p> |
