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US 2017/0283669 A1Published application
Pressure-sensitive adhesive containing nanocrystalline cellulose
Assignee3M Innovative Properties Company
InventorsCorinne E. Lipscomb, Kevin M. Lewandowski, Carla S. Thomas, Jayshree Seth, Lili Qie
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Abstract
A pressure-sensitive adhesive is provided including an emulsion polymer containing a (meth)acrylate copolymer and nanocrystalline cellulose. The inclusion of the nanocrystalline cellulose results in an increase in the overlap shear properties of the adhesive while maintaining the peel adhesion. Articles and emulsions including the pressure-sensitive adhesive are also provided.
Claims15
A pressure-sensitive adhesive comprising:
- (a) a polymer comprising:
- (i) 80 to 97 parts by weight of monomer units of an (meth)acrylic acid ester of non-tertiary alcohol, the alcohol having from 1 to 20 carbon atoms;
- (ii) 0 to 10 parts by weight of monomer units of an acid functional monomer;
- (iii) 0 to 20 parts by weight of monomer units of a second polar monomer;
- (iv) 0 to 5 parts by weight vinyl monomer units;
- and
- (v) 0 to 1 parts by weight crosslinking agent;
- and
- (b) 0.5 to 15 parts by weight of nanocrystalline cellulose.
6 more elements
An emulsion comprising:
- (a) 30 to about 70 weight percent, based on the total weight of the emulsion, of a polymer phase comprising the reaction product of:
- (i) 80 to 95 parts by weight of an (meth)acrylic acid ester of non-tertiary alcohol, the alcohol having from 1 to 20 carbon atoms, with the average number of carbon atoms being from about 4 to about 12;
- (ii) 0 to 10 parts by weight of an acid functional monomer;
- (iii) 0 to 20 parts by weight of a second, non-acid functional, polar monomer;
- (iv) 0 to 5 parts by weight of vinyl monomer;
- (v) optionally 0.01 to 1 parts by weight of a crosslinking agent;
- (vi) 0 to 0.5 parts by weight of a chain transfer agent;
- and
- (vii) 0.5 to 15 parts by weight of nanocrystalline cellulose, based on 100 parts of polymer,
- wherein the sum of (i) through (vii) is 100 parts by weight, and
- (b) 30 to 70 weight percent of an aqueous phase comprising a surfactant, based on the total weight of the emulsion.
8 more elements
Dependencies are inferred from the claim text.