Release agents suitable for use with pressure-sensitive adhesive

Details Release agents suitable for use with pressure-sensitive adhesive Release agents suitable for use with pressure-sensitive adhesive

1974-07-01

1976-07-20

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

206411, 260 775AM, 428425, C08G 1830

Patent

active

039705994

ABSTRACT:
Release agents are provided which comprise the polymeric reaction product of a fatty diamine with a diisocyanate and, optionally, a diol. These polyurea and polycarbamate products have the following recurring formula: ##EQU1## WHEREIN A is an alkylene radical containing about 2 to 6 carbon atoms, B is an arylene radical containing about 6 to 16 carbon atoms, D is an aliphatic organic radical containing about 2 to 6 carbon atoms, R is an alkyl radical containing about 12 to 25 carbon atoms, R' is hydrogen or an alkyl radical containing about 1 to 25 carbon atoms, a and b represent the number of recurring units and the ratio of b/a varies from 0 to 2, and c is 0, 1 or 2. Also provided are pressure sensitive adhesive tapes and release liners utilizing these novel release agents.

REFERENCES:
patent: 3214502 (1965-10-01), Schaar
patent: 3412054 (1968-11-01), Milligan et al.
patent: 3440223 (1969-04-01), Pierce
patent: 3607837 (1971-09-01), Reegen et al.
patent: 3658574 (1972-04-01), Izzi et al.

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