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Home Adhesives and Rubbers Low-temperature-crosslinkable-latexes-formed-by-in-situ-generation-of-a-crosslinkable-functionality

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 Low temperature crosslinkable latexes formed by in-situ generation of a crosslinkable functionality

Details
Inventors: Dougherty, Shawn Marie;
Assignee: Eastman Chemical Company (Kingsport, TN)
Primary Examiner: Cain; Edward J.
Assistant Examiner:
Attorney, Agent or Firm: Allen; Rose M., Gwinnell; Harry J.

The present invention provides crosslinkable latex compositions formed by free-radical emulsion polymerization of monoethylenically unsaturated monomers containing an amide functionality and optionally, additional copolymerizable monoethylenically unsaturated monomers. The amide functionality on the polymer is transformed into isocyanate and/or amine groups by addition of an alkali hypohalide. The polymer may further include an optional crosslinking additive to further facilitate crosslinking of the latex.

DETAILED DESCRIPTION What is claimed is: 1.
A crosslinkable latex composition comprising a crosslinkable polymer formed by free-radical emulsion polymerization of a monoethylenically unsaturated monomer containing at least one amide functional group, and optionally, additional copolymerizable monoethylenically unsaturated monomers, said amide group being transformed to an isocyanate and/or amine groups; and optionally, further comprising a crosslinking additive suitable for crosslinking with said isocyanate and/or amine groups.
2.
The crosslinkable latex composition of claim 1 wherein said monoethylenically unsaturated monomer containing at least one amide functional group is (meth)acrylamide.
3.
The crosslinkable latex composition of claim 1 wherein said monoethylenically unsaturated monomer containing at least one amide functional group is present in an amount of from 0.
05 to 30.
0 wt %, based on the total amount of monoethylenically unsaturated monomers.
4.
The crosslinkable latex composition of claim 1 wherein said monoethylenically unsaturated monomer containing at least one amide functional group is present in an amount of from 2.
0 to 15.
0 wt %, based on the total amount of monoethylenically unsaturated monomers.
5.
The crosslinkable latex composition of claim 1 wherein said monoethylenically unsaturated monomer containing at least one amide functional group is present in an amount of from 3.
0 to 8.
0 wt %, based on the total amount of monoethylenically unsaturated monomers.
6.
The crosslinkable latex composition of claim 1 wherein said optional crosslinking additive is present in an amount of up to 1.
0 equivalent based on the amount of amide group.
7.
The crosslinkable latex composition of claim 1 wherein said crosslinking additive is selected from the group consisting of pentaerythritol, glycerin and trimethylol propane.
8.
The crosslinkable latex composition of claim 1 further comprising an alkali hypohalide to transform said amide group into isocyanate and/or amine groups.
9.
A crosslinkable latex composition comprising: a crosslinkable polymer formed by free-radical emulsion polymerization of monoethylenically unsaturated monomers containing at least one amide group, and optionally, additional copolymerizable monoethylenically unsaturated monomers; an alkali hypohalide added to said crosslinkable latex to transform said amide groups into isocyanate and/or amine groups; and crosslinking additives suitable for crosslinking with said isocyanate and/or amine groups



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