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US 8,148,471 B2Granted
Acrylic pressure-sensitive adhesives with aziridinyl-epoxy crosslinking system
Assignee3M Innovative Properties Company
InventorsMaureen A. Kavanagh, Larry R. Krepski, Kelly S. Anderson, Peiwang Zhu, Belma Erdogan-Haug, Babu N. Gaddam
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Abstract
A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and a crosslinking system comprising an aziridine crosslinking agent and epoxy-functional (meth)acryloyl monomer, which when crosslinked, provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
Claims18
A crosslinkable composition comprising:
- a) a first component acid-functional acrylic copolymer comprising:
- i. 85 to 99 parts by weight of an (meth)acrylic acid ester of non-tertiary alcohol;
- ii. 1 to 15 parts by weight of an acid functional monomer;
- iii. 0 to 10 parts by weight of a second, non-acid functional, polar monomer;
- iv. 0 to 5 parts vinyl monomer;
- and
- b) a second component epoxy-functional (meth)acryloyl monomer;
- and
- c) a third component aziridine crosslinking agent of the formula:
- wherein
- R1 is H or C1-C4 alkyl;
- z is 0, 1 or 2
- R2 is a H or C1-C4 alkyl;
- R3 is a (hetero)hydrocarbyl group:
- X1 is —O— or —NR1—;
- Z is —H or a water-solubilizing group.
13 more elements
Dependencies are inferred from the claim text.