Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Halogen containing compound
Patent
1993-07-16
1995-03-14
Davis, Jenna L.
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
Halogen containing compound
428261, 428350, 428355, 524127, 525223, C09J 702
Patent
active
053976142
ABSTRACT:
A pressure sensitive adhesive which is dispersible at an alkaline pH but not at an acidic or a neutral pH is disclosed. The adhesive is essentially free from plasticizers (i.e., it contains less than 0.1 part of plasticizer per part of polymer).
The polymer is formed from A, B and C monomers. The A monomer is hydrophobic and is an acrylic or methacrylic ester of a non-tertiary C.sub.2 -C.sub.14 alcohol. It comprises from 50 to 80 weight % of the polymer.
The B monomer contains .beta.-carboxyethyl acrylate (BCEA) or a salt thereof or a mixture of BCEA or a salt thereof with a vinyl carboxylic acid or a salt thereof. The polymer contains from 10 to 30 weight % of B monomer. The acid groups of the polymer have been neutralized with from 0.5 to 2 equivalents of an alkali metal hydroxide.
The C monomer is an X--Y--Z macromer. X is copolymerizable with the A and B monomers. Y is a divalent linking group. Z is a water dispersible group that contains at least two units which are essentially unreactive under free radical conditions used to form the polymer. C comprises from 10 to 30 weight % of the polymer.
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Battles Donald R.
D'Haese Francois C.
Patnode Gregg A.
Davis Jenna L.
Griswold Gary L.
Kirn Walter N.
Lilly James V.
Minnesota Mining and Manufacturing Company
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