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US 11,034,866 B2Granted
Multilayer adhesive article
Assignee3M Innovative Properties Company
InventorsCyrus A. Anderson, Kathleen S. Shafer, Thomas Q. Chastek, Jonathan E. Janoski, Michael C. Martin, Anthony F. Schultz, Carla S. Thomas, Peter O. Rekow
Life of this patent
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Abstract
An adhesive article is described comprising a foamed adhesive layer and a non-foamed adhesive layer. The adhesive of each adhesive layer comprises a tetrahydrofurfuryl (meth)acrylate copolymer; an epoxy resin; a polyether polyol; and optionally a hydroxy-functional film-forming polymer. The adhesive may be used in structural and semi-structural bonding applications and is designed to fail cohesively.
Claims20
A multilayer article comprising:
- 1) a first curable adhesive layer comprising:
- a. 15 to 65 parts of a tetrahydrofurfuryl (meth)acrylate copolymer;
- b. 25 to 50 parts of an epoxy resin component;
- c. 5-15 parts of a liquid polyether polyol;
- e. 0.01-5 parts cationic photoinitiator, relative to 100 parts a to c;
- and
- 2) a second curable foam layer comprising:
- a. 15 to 50 parts of a tetrahydrofurfuryl (meth)acrylate copolymer;
- b. 25 to 50 parts of an epoxy resin component;
- c. 5-15 parts of a liquid polyether polyol;
- e. 0.01-5 parts cationic photoinitiator, relative to 100 parts a to c.
8 more elements
A multilayer adhesive article comprising:
- 1) a first layer of a first composition comprising a reaction product of:
- a. 15 to 50 parts of a tetrahydrofurfuryl (meth)acrylate copolymer;
- b. 25 to 50 parts of an epoxy component;
- c. 5-15 parts of a liquid polyether polyol;
- and
- e) the residue of a cationic photoiniator
- wherein the sum of a) to c is 100 parts by weight;
- and
- 2) a second layer of a second curable composition comprising a reaction product of:
- a. 15 to 50 parts of a tetrahydrofurfuryl (meth)acrylate copolymer;
- b. 25 to 50 parts of an epoxy component;
- c. 5-15 parts of a liquid polyether polyol;
- e) a void initiating component;
- and
- f) the residue of a cationic photoiniator;
- wherein the sum of a) to c is 100 parts by weight.
13 more elements
Dependencies are inferred from the claim text.