Stable waterborne polymer compositions containing poly(alkylenimines)
AssigneeEastman Chemical Company
InventorsRebecca Reid Stockl, Peter Webb Raynolds, Duane Allan Scott
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Abstract
This invention provides stable waterborne polymer compositions, which are stabilized against gelling, comprising a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-type functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5. The waterborne polymer compositions of the invention are particularly useful in a variety of adhesive formulations such as pressure sensitive adhesives, laminating adhesives, and the like. Methods of making stable waterborne polymer compositions are also disclosed.
Claims19
An adhesive composition comprising a mixture of
- (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising (i) an acetoacetoxy-functional polymer not stabilized by a surfactant, (ii) a poly(alkylenimine), and (iii) a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5, and
- (b) a non-acetoacetoxy functional polymer having a Tg of about 20° C. or lower, wherein the adhesive composition is essentially free of organic solvent.
A method for laminating a first substrate to a second substrate comprising applying an adhesive composition to a surface of the first substrate and pressing the surface of the first substrate against the second substrate, wherein the adhesive composition comprises a mixture of (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5 and (b) a non-acetoacetoxy functional polymer having a Tg of about 20° C. or lower.
A method for laminating a first substrate and a second substrate comprising passing the first and second substrates through a two roll nip having an opening and injecting an adhesive composition at the nip opening towards the first substrate and/or the second substrate, wherein the adhesive composition comprises a mixture of (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5 and (b) a non-acetoacetoxy functional polymer having a Tg of about 20° C. or lower.
An improved method for laminating a first substrate to a second substrate comprising applying an adhesive composition to a surface of the first substrate and pressing the surface of the first substrate against the second substrate, the improvement wherein the adhesive composition comprises a mixture of (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5 and (b) a non-acetoacetoxy functional polymer having a Tg of about 20° C. or lower.
A method of making a substrate bearing a coating of a pressure sensitive adhesive on at least one surface thereof comprising applying an adhesive composition to a surface of the substrate, wherein the adhesive composition comprises a mixture of (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5 and (b) a non-acetoacetoxy functional polymer having a Tg of about 0° C. or lower.
An improved method of making a substrate bearing a coating of a pressure sensitive adhesive on at least one surface thereof comprising applying an adhesive composition to a surface of a substrate, the improvement wherein the adhesive composition comprises a mixture of (a) a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5 and (b) a non-acetoacetoxy functional polymer having a Tg of about 0° C. or lower.
A method for improving the shear and/or cohesion of an adhesive composition comprising adding to the adhesive composition an effective amount of a stable waterborne polymer composition having a Tg of greater than about 0° C. and comprising an acetoacetoxy-functional polymer, a poly(alkylenimine), and, a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of at least about 17.5.
Dependencies are inferred from the claim text.