Claims
- 1. A process for producing an aqueous dispersion of vinyl acetate-ethylene copolymer containing an epoxide resin, which comprises emulsion-polymerizing vinyl acetate, wherein at least one epoxide resin having at least two epoxy groups per molecule is dissolved therein, and ethylene at a pH value of 3 to 7, so that the ratio of vinyl acetate and ethylene is in the range of 60-95: 40-5 by weight and the content of the epoxide resin is in the range of 0.5 to 60% by weight, based on the total weight of the solid resin components.
- 2. The process according to claim 1, wherein the content of the epoxide resin is in the range of 5 to 60% by weight based on the total weight of the solid resin components.
- 3. The process according to claim 2, wherein the epoxide resin is a member selected from the group consisting of a bisphenol A-epichlorohydrin epoxide compound, a polyalkylene ether epoxide compound, a side chain-containing epoxide compound, glyceryltriepoxide, an alkylphenol epoxide compound and a phenol-formaldehyde epoxide compound.
- 4. The process according to claim 3, wherein a single epoxide resin is dissolved in vinyl acetate monomer.
- 5. The process according to claim 3, wherein a mixture of at least two epoxide resins are dissolved in vinyl acetate monomer.
- 6. The process for producing an aqueous dispersion of vinyl acetate-ethylene containing an epoxide resin of 0.5 to less than 5% by weight according to claim 1, wherein the vinyl acetate containing the epoxide resin is dispersed with a dispersing agent comprising predominantly a partially hydrolyzed polyvinyl alcohol having an average degree of polymerization of 310 to 2,700 and an average degree of hydrolysis of 70 to 97% by mol and the epoxide resin is the one having an epoxy equivalent of less than 250.
- 7. The process according to claim 1, wherein the pH value of the polymerization system is adjusted to 3 to 7 with a pH adjustor selected from the group consisting of ammonium hydrogen carbonate, sodium hydrogen carbonate, disodium phosphate, sodium acetate, aqueous ammonia, acetic acid and hydrochloric acid.
- 8. An aqueous dispersion of vinyl acetate-ethylene copolymer containing an epoxide resin obtained by the process of claim 1.
- 9. The aqueous dispersion according to claim 8, wherein the content of the epoxide resin is in the range of 5 to 60% by weight.
- 10. The aqueous dispersion according to claim 8, wherein the epoxide resin has an epoxy equivalent of less than 250, which is contained in the range of 0.5 to less than 5% by weight on the basis of the total weight of the solid resin components.
- 11. A method for curing the copolymer in the aqueous dispersion of claim 8 with a curing agent.
- 12. The method according to claim 11, wherein the curing agent is an amine compound.
- 13. The method according to claim 12, wherein the amine compound is a member selected from the group consisting of an aliphatic polyamine or the mono-or di-epoxide adduct thereof, a heterocyclic amine, an aliphatic polyamine of a dimer acid, a polyamide of a dimer acid with an aliphatic amine, an aromatic polyamine, a tertiary amine, and a melamine-formaldehyde precondensate.
- 14. A cured product obtained by curing the copolymer in the aqueous dispersion of claim 8 with a curing agent.
- 15. The cured product according to claim 14, wherein the curing agent is an amine compound.
- 16. The cured product according to claim 15, wherein the amine compound is a member selected from the group consisting of an aliphatic polyamine or the mono-or di-epoxide adduct thereof, a heterocyclic amine, an aliphatic polyamine of a dimer acid, a polyamide of a dimer acid with an aliphatic amine, an aromatic polyamine, a tertiary amine, and a melamine-formaldehyde precondensate.
- 17. A two-pack adhesive comprising the aqueous dispersion of vinyl acetate-ethylene copolymer containing an epoxide resin of claim 8 and a curing agent.
- 18. The two-pack adhesive according to claim 17, wherein the curing agent is an amine compound.
- 19. The two-pack adhesive according to claim 18, wherein the amine compound is a member selected from the group consisting of an aliphatic polyamine or the mono-or di-epoxide adduct thereof, a heterocyclic amine, an aliphatic polyamine of a dimer acid, a polyamide of a dimer acid with an aliphatic amine, an aromatic polyamine, a tertiary amine, and a melamine-formaldehyde precondensate.
- 20. A two-pack coating composition comprising the aqueous dispersion of vinyl acetate-ethylene copolymer containing an epoxide resin of claim 8 and a curing agent.
- 21. The two-pack coating composition according to claim 20, wherein the curing agent is an amine compound.
- 22. The two-pack coating composition according to claim 21, wherein the amine compound is a member selected from the group consisting of an aliphatic polyamine or the mono-or di-epoxide adduct thereof, a heterocyclic amine, an aliphatic polyamine of a dimer acid, a polyamide of a dimer acid with an aliphatic amine, an aromatic polyamine, a tertiary amine, and a melamine-formaldehyde precondensate.
Priority Claims (2)
Number |
Date |
Country |
Kind |
50-6599 |
Jan 1975 |
JPX |
|
50-87528 |
Jul 1975 |
JPX |
|
Parent Case Info
This application is a continuation-in-part application of U.S. Ser. No. 648,659 filed on Jan. 13, 1976, now abandoned.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
648659 |
Jan 1976 |
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