| 摘要 |
<p>1340761 Thermoplastic adhesive compositions EASTMAN KODAK CO 19 April 1971 [28 Jan 1970] 20560/71 Heading C3R and C3P [Also in Division B5] A thermoplastic adhesive composition comprises (a) 70-99 weight per cent, based on the combined weights of (a) and (b), of a linear thermoplastic polyester having an acid component selected from aliphatic acids containing 2-30 carbon atoms, terephthalic, isophthalic, hexahydroterephthalic and hexa-hydroisophthalic acids and a diol component comprising an aliphatic diol of 2-6 carbon atoms, (b) 1-30 weight per cent, based on the combined weights of (a) and (b), of a polyolefin or vinyl type polymer, and (c) 5-65 wt. per cent, based on the combined weights of (a), (b) and (c) of a viscosity decreasing additive having a boiling point above 250‹ C. and a Tg below 10‹ C. which is: (1) an unsubstituted aromatic compound, (2) a substituted aromatic compound containing up to two benzene rings having substituents selected from halogen, C1-C4 alkyl, hydroxyl, sulphonamide and -COOR where R is alkyl of up to 8 carbon atoms, (3) an organic aromatic compound containing at least two aromatic rings connected by divalent groups selected from oxy, thio, sulphonyl, phosphate and carboxamide, or (4) a chlorinated terphenyl containing up to 50 wt. per cent chlorine, triphenyl phosphate, tricresyl phosphate or tri(o-chlorophenyl) phosphate. Granular metallic material, e.g. aluminium, may be added to the composition. The examples describe compositions containing polyesters derived from ethylene glycol and terephthalic acid, optionally mixed with sebacic acid, 1,4-butanediol and terephthalic acid, optionally mixed with isophthalic acid, 1,4- butanediol and trans-1,4-cyclohexanedicarboxylic acid, and neopentyl glycol with a mixture of adipic acid and 2,6-naphthalene dicarboxylic acid, with polystyrene, polyethylene and poly(1- butane) and many viscosity decreasing additives, e.g. biphenyl, chlorinated biphenyl, terphenyl, dibutyl phthalate and diphenyl ether.</p> |
