Water-based adhesive formulation having enhanced characteristics
AssigneeH. B. Fuller Licensing & Financing, Inc.
InventorsMike Maksymkiw, Gray Haider, Michael Dochniak, Leonard Jannusch, Paul Wade
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Abstract
Adhesive formulations are blends of aqueous polymer dispersions and a hydrophobic plasticizer. The blended dispersed polymers include at least one hard sulfonated polyester urethane, at least one soft non-sulfonated polyester urethane, and at least one polar non-polyurethane water-based polymer or copolymer. A high molecular weight elastomeric non-sulfonated polyurethane polymer and a crosslinker are optional further components in the blend. The formulations are useful as non-heat activating, one-component adhesives which generate excellent green strength, water and heat resistant bonds.
Claims27
An adhesive formulation comprising a dispersion in an aqueous media of:
- a) at least one hydrophobic plasticizer, and
- b) a blended mixture of dispersed polymers, the mixture comprising:
- 1) at least one hard sulfonated polyester urethane;
- 2) at least one soft non-sulfonated polyester urethane;
- and
- 3) at least one polar non-polyurethane water-based polymer or copolymer.
An adhesive formulation comprising a dispersion in an aqueous media of:
- a) at least one hydrophobic plasticizer selected from the group consisting of alkyl and aryl sulfonamides, benzoate esters, phthalate esters, adipates, citrates, and mixtures thereof;
- and
- b) an aqueous polyurethane dispersion comprising
- 1) at least one anionic sulfonated polyester urethane polymer which is characterized by a shear storage modulus (G') having a value of from about 10.sup.9 to about 10.sup.10 dynes/cm.sup.2 at 25.degree. C. and a frequency of 10 radians/sec;
- 2) at least one high molecular weight elastomeric non-sulfonated polyester urethane;
- 3) at least one tacky non-sulfonated polyester urethane which is characterized by a shear storage modulus (G') having a value of from about 10.sup.6 dynes/cm.sup.2 to about 10.sup.8 dynes/cm.sup.2 at 25.degree. C. and 10 radians/sec;
- and
- c) at least one polar non-polyurethane polymer selected from the group consisting of vinyl acetate polymers and copolymers, acrylic polymers, and epoxy polymers.
Dependencies are inferred from the claim text.