Polytetramethyleneether polyurethane adhesive composition

Details Polytetramethyleneether polyurethane adhesive composition Polytetramethyleneether polyurethane adhesive composition

1972-06-30

1976-07-13

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 308DS, 260 326NR, 260 328N, 260 332R, 260 775AM, C08G 1866

Patent

active

039693015

ABSTRACT:
A polyurethane composition which is the reaction product of (a) 4,4'-methylenebis(phenyl isocyanate), (b) tolylene diisocyanate, (c) 1,4-butanediol and (d) polytetramethyleneether glycol having a number average molecular weight of about 600-2100; the mole ratio of (a) to (b) being about 1.2/1 to 2.5/1, the mole ratio of (c) to (d) being such that the average molecular weight of a mixture of (c) and (d) is about 450-850, and the mole ratio of (a) plus (b) to (c) plus (d) being about 1/1.015 to about 1/1.050. Such polyurethanes form exceptionally good adhesives.

REFERENCES:
patent: 3184426 (1965-05-01), Thoma
patent: 3401133 (1968-09-01), Grace
patent: 3446771 (1969-05-01), Matsubayashi
patent: 3470121 (1969-09-01), Cobbledick
patent: 3541053 (1970-11-01), Harrell

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