By (262Sattorney 3,085,919 United States Patent Office Patented Apr
April 16, 1963 H. CLARK 3,085,919 LAMINATED ARTICLES OF. REINFORCED PLASTICS AND METHODS OF MAKING SAME Filed Jan. 31, 958 Hodden Cork inventor By (262sAttorney 3,085,919 United States Patent Office Patented Apr. 16, 1963 2 to this invention are particularly those which have hy 3,085,919 drophilic surfaces. Examples of such materials are LAMINATED ARTICLES OF REINFORCED PLAS glass, rock, talc, and mineral fillers, especially glass fibers, TCS AND METHODS OF MAKENG SAME glass wool, rock wool, and the like. These agents, be Hadden Clark, Painfield, N.Y., assignor to Esso Research cause of their attraction for water, are the ones which and Eagineering Corpany, a corporation of Delaware cause the problem of insufficient adhesion with a resin. Filed Jan. 31, 1958, Ser. No. 712,442 Reinforcing agents may be used in amounts of up to 80%, 2 Claims. (C. 54-43) preferably 50-70%. The present invention relates to a coupling agent for Synthetic drying oils used in this invention are the reinforced plastic and more particularly to the coating of O conjugated diolefins having 4 to 6 carbon atoms per reinforcing agents with a coupling agent to bond the molecule, as butadiene, isoprene, dimethyl butadiene, reinforcing agents with the resins to a unitary product. piperylene, and methyl pentadiene. Diolefins, copolymer In the past, there has been a considerable problem in ized with minor amounts of ethylenically unsaturated obtaining sufficient adhesion between a hydrophobic resin monomers as styrene, acrylonitrile, methyl vinyl ketone, and a hydrophilic reinforcing agent. Many of the coup 5 or with styrenes having alkyl groups substituted on the ling materials used in the past will effect satisfactory ring (paramethyl styrene, dimethyl styrene, etc.), may adhesion if the reinforced plastic is tested for its dry also be used.
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