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US 7,931,774 B2Granted
Acrylic adhesives containing an amine plasticizer
Assignee3M Innovative Properties Company
InventorsPeter B. Hall, Jingjing Ma, Dong-Wei Zhu
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Abstract
Acrylic adhesives containing an acrylic polymer and a plasticizer are provided. The acrylic polymer includes copolymerized monomers of a first alkyl acrylate, a second alkyl acrylate, and a vinyl carboxylic acid. The alkyl group of the first alkyl acrylate has at least 4 carbon atoms, and the alkyl group of the second alkyl acrylate has 1-3 carbon atoms. The plasticizers include a di-ethoxylated tertiary amine segment.
Claims21
An adhesive comprising:
- an acrylic polymer comprising copolymerized monomers of
- (a) 30 to 70% by weight of a first alkyl acrylate, wherein the alkyl group of the first alkyl acrylate has at least 4 carbon atoms,
- (b) 15 to 35% by weight of a second alkyl acrylate, wherein the alkyl group of the second alkyl acrylate has 1-3 carbon atoms, and
- (c) 15 to 35% by weight of a first vinyl carboxylic acid;
- and
- a plasticizer comprising a di-ethoxylated tertiary amine segment, wherein the plasticizer is selected from the group consisting of:
- an amine according to the formula:
- and
- a diamine according to the formula:
- wherein n1, n2, and n3 are independently selected, n1 and n2 are greater than 1, R is an alkyl group, and m is between 1 and 4, inclusive.
7 more elements
Dependencies are inferred from the claim text.