Polyester-acrylic hybrid resins for compostable adhesives
AssigneeAvery Dennison Corporation
InventorsDanny G. HARTINGER, Qiang LUO
Life of this patent
Estimating the term…
Abstract
Water-based and solvent-based polyester-(meth)acrylate hybrid polymers that may be utilized as compostable pressure-sensitive adhesives are provided. The aqueous dispersions exhibit an improved shelf-life and provide an improvement in handling and application or deposition/coating onto a variety of substrates, such as for making a pressure sensitive adhesive construct.
Claims38
A polyester-(meth)acrylate hybrid polymer composition comprising:
- a polyester portion covalently bound to a (meth)acrylate portion, the polyester portion comprising an alternating copolymer comprising repeating (AB) units or (BA) units or a combination thereof, wherein (A) is an epoxide and (B) is an anhydride (B), and the (meth)acrylate portion comprising a (meth)acrylate polymer,
- wherein the polyester portion is present in the polyester-(meth)acrylate hybrid polymer at a level of about 5% to about 95% by weight, based on the total weight of the polyester-(meth)acrylate hybrid polymer.
-30. (canceled)
A polyester macromer comprising:
- an alternating copolymer comprising up to 50 repeating (AB) units or (BA) units or a combination thereof, wherein (A) is an epoxide and (B) is an anhydride (B), and the (meth)acrylate portion comprising a (meth)acrylate polymer,
- wherein the repeating units are a reaction product of one or more ethylenically unsaturated monomers, one or more epoxides, one or more anhydrides, an epoxy catalyst, and optionally a free radical inhibitor.
-37. (canceled)
A method for producing a polyester macromer comprising:
- polymerizing a monomer mixture comprising one or more ethylenically unsaturated monomers, one or more epoxides, one or more anhydrides, an epoxy catalyst, and optionally a free radical inhibitor to form a terminally ethylenically unsaturated polyester macromer copolymer.
-46. (canceled)
-53. (canceled)
A method for producing a solvent-based polyester-(meth)acrylate hybrid polymer composition comprising:
- providing a (meth)acrylate polymer optionally dissolved in an aprotic solvent, the (meth)acrylate polymer containing an acid and/or an alcohol functional group on the polymer backbone;
- copolymerizing the (meth)acrylate polymer with one or more epoxides, one or more anhydrides, an epoxy catalyst, and optionally a free radical inhibitor to form the polyester-(meth)acrylate hybrid polymer,
- wherein the step of copolymerizing comprises growing a side chain polyester oligomer off of the (meth)acrylate polymer, and
- wherein the polyester oligomer is present in the polyester-(meth)acrylate hybrid polymer at level of about 5% to about 95% by weight, based on the total weight of the polyester-(meth)acrylate hybrid polymer.
-59. (canceled)
Dependencies are inferred from the claim text.