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US 8,507,612 B2Granted
Aziridine crosslinking agents for acrylic adhesives
Assignee3M Innovative Properties Company
InventorsPeiwang Zhu, Zhong Chen, Babu N. Gaddam, Larry R. Krepski, Jingjing Ma, David B. Olson, Andrew Satrijo, Dong-Wei Zhu
Life of this patent
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Abstract
A crosslinkable, pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
Claims22
A crosslinking agent of the formula:
- Wherein
- R1 is a polyvalent organic group having a chain length of 2 to 250 atoms;
- X is —O— or —NR3—, where R3 is H or C1-C4 alkyl;
- Ar is a divalent arylene group;
- R2 is H or C1-C4 alkyl;
- x is 2 or 3, and y is 0, 1 or 2.
3 more elements
A crosslinking agent of the formula:
- where
- R1 is a polyvalent organic group having a chain length of 2 to 250 atoms;
- X is —O— or —NR3—, where R3 is H or CH3;
- R2 is H or C1-C4 alkyl;
- and y is 0, 1 or 2.
2 more elements
A crosslinking agent of the formula:
- wherein
- Ar is a divalent arylene group;
- R2 is H or C1-C4 alkyl;
- b is at least 1;
- y is 0, 1 or 2;
- R5 is selected from divalent C1-C20 alkylene, arylene, alkyarylane or poly(alkylene oxide).
3 more elements
Dependencies are inferred from the claim text.