Acrylic compositions adhering to low surface energy substrates

摘要

In general, the invention features a pressure sensitive adhesive that comprises the reaction product of:
(a) from about 25 to about 95 parts by weight of at least one acrylic acid ester of a monohydric alcohol whose homopolymer has a Tg less than 0° C.,(b) from 0 to about 75 parts by weight of at least one non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a Tg greater than 15° C.; and(c) from about 5 to about 35 parts by weight of at least one polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a Tg greater than 15° C.;The pressure sensitive adhesives adhere to substrates having a low surface energy and/or high surface energy.

主权项

1. A pressure sensitive adhesive comprising the reaction product of:
(a) from about 25 to about 95 parts by weight of at least one acrylic acid ester of a monohydric alcohol whose homopolymer has a Tg less than 0° C., (b) from 0 to about 75 parts by weight of at least one additional ethylenically unsaturated monomer (c) about 35 parts by weight of at least one polar ethylenically unsaturated monomer with the generic structure of Formula I where in the structure of Formula I R1=H or CH3 X=O or N R2=Formula II wherein R4 is a member selected from the group consisting of hydrogen, methyl, ethyl, chloromethyl, methylol, phenyl, methoxyphenyl, methoxybutyl, and methoxyallyl; P is an integer of from about 0 to 3, q is an integer of from 1 to 3; R3 is an unsaturated divalent alkyl or substituted alkyl group of from 2-4 carbon atoms or a saturated or unsaturated divalent carbocyclic aliphatic ring of from 4-9 carbon atoms, and preferably 5-6 carbon atoms; and A is a member selected from the group consisting of O, NH, or NR1 where R1 is previously defined.