Vinyl acetate-ethylene/acrylic polymer emulsions and products and methods relating thereto
AssigneeAvery Dennison Corporation
InventorXiaochuan Hu
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Abstract
Methods of producing hybrid polymer emulsions by incorporating a vinyl acetate-ethylene copolymer dispersion as the seed for subsequent polymerization of an acrylic and/or methacrylic monomer mixture are described. In certain embodiments, new particle formation is observed. Also described are the resulting polymeric products. And hybrid polymer emulsions formed from the methods with pressure sensitive adhesion performance are also described.
Claims64
A polymer emulsion comprising:
- particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer,
- wherein the (meth)acrylic polymer or copolymer is prepared in situ by polymerization and/or copolymerization of a (meth)acrylic monomer mixture, and
- wherein the polymer emulsion has a monomodal particle size distribution.
A process for producing a polymer emulsion comprising:
- providing a vinyl acetate-ethylene copolymer dispersion as a seed;
- providing a monomer feed;
- providing an initiator;
- combining the vinyl acetate-ethylene copolymer dispersion, the monomer feed, and the initiator to produce the polymer emulsion comprising a combination of particles that comprise particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer,
- wherein the polymer emulsion has a monomodal particle size distribution.
A pressure sensitive adhesive comprising;
- a polymer emulsion comprising a combination of particles that comprise (1) particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer, or (2) particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer and particles that comprise only a (meth)acrylic polymer or copolymer,
- wherein the (meth)acrylic polymer or copolymer is prepared by polymerization and/or copolymerization of a (meth)acrylic monomer mixture,
- wherein the pressure sensitive adhesive has a glass transition temperature of about 10° C. to about −60° C.
A polymer emulsion comprising:
- a combination of particles that comprise particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer and particles comprising only a (meth)acrylic polymer or copolymer,
- wherein the (meth)acrylic polymer or copolymer is prepared in situ by polymerization and/or copolymerization of a (meth)acrylic monomer mixture, and
- wherein the polymer emulsion has a multimodal particle size distribution.
A process for producing a polymer emulsion comprising:
- providing a vinyl acetate-ethylene copolymer dispersion as a seed;
- providing a monomer feed;
- providing an initiator;
- combining the vinyl acetate-ethylene copolymer dispersion, the monomer feed, and the initiator to produce the polymer emulsion comprising a combination of particles that comprise particles comprising both a vinyl acetate-ethylene (VAE) copolymer and a (meth)acrylic polymer or copolymer and particles that comprise only a (meth)acrylic polymer or copolymer,
- wherein the polymer emulsion has a multimodal particle size distribution.
Dependencies are inferred from the claim text.