| 摘要 |
<p>Glass fibrous strands are coated with glycidyl or polyglycidyl acrylate or methacrylate and a polymerizable unsaturated polyester resin, and the coating is thereafter copolymerized. The polyglycidyl acrylates and methacrylates used are those formed by coupling through the epoxy groups only. Unsaturated polyester resins specified are those made by reacting unsaturated polycarboxylic acids with polyhydric alcohols (see Group IV (a)). The polyester resins may be employed in admixture with an inert solvent, or more preferably with a compound free from epoxy groups but containing a vinylidene group, e.g. esters, hydrocarbons, halides, and nitriles. In a preferred procedure the glass fibres are first coated with the glycidyl or polyglycidyl acrylate or methacrylate, and thereafter with the polyester resin, the coatings then being polymerized. Specification 600,917, [Group IV (a)], is referred to.ALSO:Laminates are produced by coating glass fibrous strands with glycidyl or polyglycidyl acrylate or methacrylate and a polymerizable unsaturated polyester resin, and thereafter co-polymerizing the coating. The polyglycidyl acrylates and methacrylates used are those formed by coupling through the epoxy groups only. Unsaturated polyester resins specified are those made by reacting unsaturated polycarboxylic acids such as maleic, fumaric, aconitic, and itaconic acids, in admixture if desired with saturated polycarboxylic acids, e.g. malonic, succinic, adipic, glutaric, sebacic and phthalic acids, with polyhydric alcohols such as ethylene and diethylene glycols, glycerol and pentaerythritol. The polyester resins may be employed in admixture with an inert solvent such as acetone, methyl ethyl ketone, diethyl ketone, and toluene, or more preferably with a compound free from epoxy groups but containing a vinylidene group, such as allyl alcohol, allyl acetate and acrylate, diallyl malonate, oxalate, succinate, adipate, phthalate and maleate, triallyl tricarballylate and phosphate, styrene, alpha-methyl styrene, ortho-methyl, meta-ethyl, and para-butyl styrenes, 2,4-dichlorostyrene, 2,5-dichlorostyrene, acrylonitrile, methacrylonitrile and others mentioned in Specification 600,917. The polymerization may be assisted by catalysts such as benzoyl, phthaloyl, succinoyl, benzoyl acetic, lauric, oleic, and ditertiary butyl peroxides, coconut oil peroxides, tertiary butyl hydroperoxide, 2,2-bis(tertiary butyl peroxy) butane, ascaridole, and methyl ethyl ketone hydroperoxide, and room temperature catalysts such as 1-hydroxy cyclopentyl peroxide, 1-hydroxy cyclohexyl hydroperoxide-1 and 1-hydroxy cycloheptyl hydroperoxide-1, which may be used in conjunction with metallic salt driers such as cobalt and lead naphthenates. In a preferred procedure the glass fibres are first coated with the glycidyl or polyglycidyl acrylate or methacrylate, and thereafter with the polyester resin, the coatings then being polymerized.</p> |
