Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
252364, C08K 510
Solvent systems, and adhesive systems comprising such solvent systems, primarily for use in forming speed-glued table tennis rackets are described. One embodiment of the solvent systems comprises a cycloalkane having from about 3 to about 10 carbon atoms, an ester having from about 2 to about 10 carbon atoms, and a terpene having a molecular weight of from about 110 to about 160. The cycloalkane generally is selected from the group consisting of cyclopentane, cyclohexane, and cycloheptane, with cyclohexane being a currently preferred cycloalkane. A currently preferred ester is ethyl acetate, and a currently preferred terpene is limonene. The solvent system also may comprise an ether, and preferred ethers are dipropylene glycol dimethyl ether and propylene glycol methyl ether acetate. The solvent system also can include an aliphatic alkane having about 10 carbon atoms or fewer, the aliphatic alkane being used in sufficient quantity to adjust the vapor pressure of the solvent system to be from about 50 mm/Hg to about 100 mm/Hg at 25.degree. C. Examples of suitable aliphatic alkanes are heptane, 2,2,4-trimethylpentane and mixtures thereof. The present invention also provides adhesive systems for use in forming speed-glued table tennis rackets. The adhesive system comprises the solvent systems described above, and from about 2 to about 10 weight percent of a solid or solids suitable for speed gluing table tennis rubbers to table tennis blades. A method for speed gluing a table tennis racket also is described. The method generally comprises forming a solvent or adhesive system as discussed above. The solvent or adhesive system is then applied to a table tennis rubber, a table tennis blade, or both. The rubber is then attached to the blade to form a speed-glued table tennis racket. If just a solvent system is used, then the rubber and/or the blade must provide sufficient solid or solids to adhere the rubber to the blade.
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