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US 10,208,232 B2Granted
Adhesive composition
Assignee3M Innovative Properties Company
InventorsShujun J. Wang, Zhong Chen, John R. Jacobsen, Peggy S. Willett, David J. Yarusso, Soyoung Kim
Life of this patent
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Abstract
Disclosed is a crosslinked adhesive composition comprising a low Tg (meth)acrylate copolymer component, a high Tg (meth)acrylate copolymer component, and a hydrogenated hydrocarbon tackifier. This disclosure provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles that are particularly useful in the bonding of low surface energy (LSE) substrates.
Claims5
A process for preparing a melt-processible adhesive comprising:
- a) dissolving a high Tg copolymer having a Mw>30 kD comprising:
- i) up to 100 parts by weight of high Tg (meth)acrylic acid ester monomer units;
- ii) 1 to 10 parts by weight of acid functional ethylenically unsaturated monomer units;
- iii) 0 to 50 parts by weight of optional low Tg (meth)acrylic acid ester monomer units;
- iv) 1 to 10 parts by weight of non-acid functional, ethylenically unsaturated polar monomer units;
- v) 0 to 5 parts by weight of vinyl monomer units;
- wherein the sum of i) to v) is 100 parts by weight;
- and
- wherein monomer units i) to v) are distinct monomer units;
- in a monomer mixture for a low Tg copolymer comprising
- i. 85 to 99.5 parts by weight of low Tg (meth)acrylic acid ester monomers;
- ii. 0.5 to 15 parts by weight of acid functional ethylenically unsaturated monomers;
- iii. 1 to 10 parts by weight of non-acid functional, ethylenically unsaturated polar monomers;
- iv. 0 to 5 parts of vinyl monomers;
- wherein the sum of i) to iv) is 100 parts by weight;
- and
- wherein monomer units i) to iv) are distinct monomer units;
- said mixture optionally including a hydrogenated hydrocarbon tackifier;
- b) polymerizing the resultant mixture;
- c) adding hydrogenated hydrocarbon tackifier if not present in step a);
- d) melt extruding the polymerized mixture to form an extrudate;
- and
- e) crosslinking the extrudate by electron beam irradiation;
- wherein the adhesive comprises a minimum of 0.05 moles of acid/base pairs per kilogram of the composition and comprising 0.1 to 20 parts by weight of a hydrogenated hydrocarbon tackifier, based on 100 parts by weight of the low Tg monomer mixture and high Tg copolymer.
21 more elements
An electron-beam crosslinked adhesive composition comprising:
- a) a high Tg copolymer having a Mw>30 kD comprising:
- i) up to 100 parts by weight of high Tg (meth)acrylic acid ester monomer units;
- ii) 1 to 10 parts by weight of acid functional ethylenically unsaturated monomer units;
- iii) 0 to 50 parts by weight of optional low Tg (meth)acrylic acid ester monomer units;
- iv) 1 to 10 parts by weight of non-acid functional, ethylenically unsaturated polar monomer units;
- v) 0 to 5 parts by weight of vinyl monomer units;
- wherein the sum of i) to v) is 100 parts by weight;
- and
- wherein monomer units i) to v) are distinct monomer units;
- b) a low Tg copolymer comprising
- i. 85 to 99.5 parts by weight of low Tg (meth)acrylic acid ester monomers;
- ii. 0.5 to 15 parts by weight of acid functional ethylenically unsaturated monomers;
- iii. 1 to 10 parts by weight of non-acid functional, ethylenically unsaturated polar monomers;
- iv. 0 to 5 parts of vinyl monomers;
- wherein the sum of i) to iv) is 100 parts by weight;
- and
- wherein monomer units i) to iv) are distinct monomer units;
- and
- c) 0.1 to 20 parts by weight of a hydrogenated hydrocarbon tackifier, based on 100 parts by weight of the low Tg monomer mixture and high Tg copolymer a hydrogenated hydrocarbon tackifier;
- wherein the adhesive comprises a minimum of 0.05 moles of acid/base pairs per kilogram of the composition.
17 more elements
Dependencies are inferred from the claim text.