Bonded can having high hot water resistance and undercoating com

Details Bonded can having high hot water resistance and undercoating com Bonded can having high hot water resistance and undercoating com

1978-02-07

1979-11-06

Robinson, Ellis P.

Receptacles

Outlet or junction box type

Sectional receptacle

220 1BC, 525423, 220456, 220458, 260831, 426113, 426126, 426131, 428 35, 428414, 428416, 428418, 428460, 428475, 428474, B65D 2514, B65D 2534, B32B 1508, B32B 2738

Patent

active

041732901

ABSTRACT:
A bonded can having a high hot water resistance, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating composition comprises 50 to 95% by weight of an epoxy resin having a number average molecular weight of 800 to 5500, which is obtained by condensation of an epihalohydrin with bisphenol A, and 5 to 50% by weight of a resol-type phenol-aldehyde resin having a number average molecular weight of 200 to 1000, which is obtained by reacting a mixed phenol comprising 65 to 98% by weight of a dihydric phenol represented by the following general formula: ##STR1## wherein R stands for a bridging group or is a direct bond,
and 2 to 35% by weight of a monohydric phenol, with an aldehyde in the presence of a basic catalyst.
This bonded can can resist retort sterilization conducted at 122.degree. to 135.degree. C. without substantial reduction of the peel strength of the bonded portion.

REFERENCES:
patent: 3663354 (1972-05-01), Meno
patent: 3703434 (1972-11-01), Schaaf
patent: 3936342 (1976-02-01), Matsubara
patent: 3993841 (1976-11-01), Matsubara
patent: 4035436 (1977-07-01), Matsubara

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