Hot-melt adhesive of a copolyester of a dibasic acid with a poly

Details Hot-melt adhesive of a copolyester of a dibasic acid with a poly Hot-melt adhesive of a copolyester of a dibasic acid with a poly

1983-10-18

1985-02-19

Phynes, Lucille M.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

528272, 528302, 528305, 5283086, 5283087, B65D 000, C08G 6302

Patent

active

045005753

ABSTRACT:
Disclosed is a hot-melt adhesive which comprises a copolyester of a dibasic acid component comprising 70 to 97 mole % of terephthalic acid and other dibasic acid with a polyhydric alcohol component comprising 70 to 97 mole % of 1,4-butane-diol, 3 to 30 mole % of diethylene glycol and up to 20 mole % of other polyhydric alcohol having 2 to 5 carbon atoms, said copolyester having a reduced viscosity of at least 0.6 dl/g as measured at a temperature of 30.degree. C. in a phenol/tetrachloroethane mixed solvent having a phenol/tetrachloroethane weight ratio of 60/40 at a polymer concentration of 0.25 g/100 ml, a glass transition temperature of at least 31.degree. C. and a crystallinity of 15 to 40 %.
This hot-melt adhesive is excellent in the operation adaptability, and in the form of a film, the adhesive has an appropriate rigidity and a good dimension stability. Furthermore, when this hot-melt adhesive is formed into an adhesive layer between seams by hot bonding, the adhesive layer provides a high creep resistance and a good dimension stability. This hot-melt adhesive is valuably used for producing a metal vessel having a circumferential side seam by bonding cup-shaped lower and upper members along circumferential open ends of the two members.

REFERENCES:
patent: 4156774 (1979-05-01), Buxbaum et al.
patent: 4363853 (1982-12-01), Imamura et al.
patent: 4395538 (1983-07-01), Taira et al.
patent: 4419507 (1983-12-01), Sublett

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