Modified latex polymer composition
First Claim
1. An aqueous polymeric dispersion prepared by the process comprising(a) emulsion polymerizing at least one mono-ethylenically unsaturated monomer to form an initial dispersion of initial water insoluble latex polymer containing essentially no sites of ethylenic unsaturation,(b) dispersing ethylenically unsaturated monomer including monomer having at least two sites of ethylenic unsaturation into said initial dispersion whereby said dispersed monomers swells said dispersed said initial latex polymer,(c) polymerizing said dispersed ethenically unsaturated monomer within said monomer-swollen initial latex polymer;
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Abstract
This invention relates to modified aqueous dispersions of water-insoluble latex polymer prepared by swelling an initial water-insoluble latex polymer, prepared by emulsion polymerization, with additional ethylenically unsaturated monomer, including at least one monomer with two or more sites of ethylenic unsaturation, and subsequently polymerizing the additional monomer within the swollen latex particles.
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Citations
55 Claims
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1. An aqueous polymeric dispersion prepared by the process comprising
(a) emulsion polymerizing at least one mono-ethylenically unsaturated monomer to form an initial dispersion of initial water insoluble latex polymer containing essentially no sites of ethylenic unsaturation, (b) dispersing ethylenically unsaturated monomer including monomer having at least two sites of ethylenic unsaturation into said initial dispersion whereby said dispersed monomers swells said dispersed said initial latex polymer, (c) polymerizing said dispersed ethenically unsaturated monomer within said monomer-swollen initial latex polymer; - and
(d) where the final composition of said latex polymer containing said polymerized ethylenically unsaturated monomer dispersed in said initial latex polymer comprises from about 67 to about 99 percent by weight initial latex polymer and from about 33 to about 1 percent by weight polymerized ethylenically unsaturated polymer dispersed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 55)
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51. An aqueous polymeric dispersion of improved water-insoluble latex polymer yielding films with increased toughness and hardness, comprising an initial latex polymer and a second polymeric phase in the form of a network of domains dispersed within said initial latex polymer, wherein said second phase is polymerized from ethylenically unsaturated monomer comprising at least about 5 percent by weight, based on the total weight of said ethylenically unsaturated monomer, of multifunctional monomer having at least two sites of ethylenic unsaturation, wherein the ratio of the weight of solids of said second polymeric phase to the weight of solids of said initial latex polymer is from about 1:
- 100 to 1;
4. - View Dependent Claims (52, 53, 54)
- 100 to 1;
Specification