Pressure sensitive adhesive comprising (meth) acrylic polymer and amino acid crosslinker
Assignee3M Innovative Properties Company
InventorsSerkan Yurt, Ibrahim A. El-Hedok, Kumars Sakizadeh, Jayshree Seth
Life of this patent
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Abstract
A pressure sensitive adhesive composition is described that comprises a (meth)acrylic polymer comprising polymerized units of (meth)acrylic ester monomer having a Tg less than 0° C. and ethylenically unsaturated monomer comprising a pendent functional group crosslinked with an amine or carboxylic acid group of at least one amino acid. Also described are aqueous pressure sensitive adhesive compositions, adhesive-coated articles, and methods.
Claims26
A pressure sensitive adhesive composition comprising:
- a (meth)acrylic polymer comprising polymerized units of (meth)acrylic ester monomer having a Tg less than 0° C. and ethylenically unsaturated monomer comprising a pendent functional group crosslinked with an amine or carboxylic acid group of at least one amino acid.
A pressure sensitive adhesive composition comprising:
- an aqueous phase;
- a surfactant;
- a (meth)acrylic polymer comprising polymerized units of (meth)acrylic ester monomer having a Tg less than 0° C. and ethylenically unsaturated monomer comprising a pendent functional group wherein the pendent functional group forms an ionic or covalent bond with an amine or carboxylic acid group;
- and
- an at least one amino acid crosslinker.
A method of making a pressure sensitive adhesive composition comprising:
- a) providing an aqueous pressure sensitive adhesive composition comprising a (meth)acrylic polymer comprising polymerized units of an ethylenically unsaturated monomer comprising a pendent functional group that forms an ionic or covalent bond with an amine or carboxylic acid group;
- b) combining the aqueous pressure sensitive adhesive composition with an amino acid;
- c) coating the aqueous pressure sensitive adhesive composition prepared in (b) onto a substrate;
- e) drying the pressure sensitive adhesive composition and thereby crosslinking the pendent functional groups of the (meth)acrylic polymer with the amino acid.
A method of making a pressure sensitive adhesive composition comprising:
- a) making a monomer mixture comprising
- (i) low Tg (meth)acrylic monomer;
- b) combining the monomer mixture with an aqueous phase comprising
- (i) water,
- (ii) an amino acid comprising a side chain having a chain transfer group selected from SH, SeH, or OH;
- (iii) a surfactant, and
- (iv) a free-radical initiator;
- wherein monomer having a functional group that is reactive with an amine or carboxylic acid group is present in the monomer mixture, the aqueous phase, or a combination thereof;
- c) polymerizing the monomers;
- d) coating the aqueous pressure sensitive adhesive composition onto a substrate;
- e) drying the pressure sensitive adhesive composition and thereby crosslinking the pendent functional groups of the (meth)acrylic polymer with the amino acid.
The pressure sensitive adhesive of any of the previous claim wherein the pressure sensitive adhesive has a shear strength after aging for 10 days at 120° F. of greater than or equal to the initial shear strength.
Dependencies are inferred from the claim text.