Glycerol ester-free functionalized vegetable oil derivatives and their latex compounds
The present invention is directed to a fatty amide (meth)acrylate monomer, methods of making the monomer, and latex polymers comprising the fatty amide (meth)acrylate monomer. The monomers are derived by reacting unsaturated vegetable oils with ethanolamine or substituted ethanolamine. The vegetable oil derivative is then reacted with either (meth)acryloyl chloride or (meth)acrylic acid to form a fatty amide (meth)acrylate monomer or the product of the reaction of hydroxyethyl (meth)acrylate reacted with isophorone diisocyanate to form a urethane fatty amide (meth)acrylate monomer. The increased hydrophilicity of the fatty amide (meth)acrylate monomer facilitates the diffusion through the aqueous phase. The monomer synthesis is designed to be glycerol ester-free to increase long term stability for monomers and polymers.
1. A latex polymer comprising the emulsion polymerization product of:
an aqueous dispersed ethylenically unsaturated monomer suitable for forming a latex composition; and
an aqueous dispersed fatty amide (meth)acrylate monomer of the formula:
wherein R=CH 3 , H or CH 2 CH 2 OH
R′=unsaturated or a mixture of unsaturated and saturated straight chain hydrocarbon groups of a fatty acid of a vegetable oil;
R″=CH 3 or H; and
U =
said product being a latex polymer and
wherein the fatty amide (meth)acrylate monomer is completely polymerized by emulsion polymerization and the fatty amide (meth)acrylate monomer content of the latex composition is 18 weight percent or more.
2. The latex polymer of claim 1 , wherein the fatty acid of the modified fatty amide (meth)acrylate monomer is derived from linseed oil, soybean oil, coconut oil, safflower oil, or tung oil.
3. The latex polymer of claim 1 wherein the fatty acid of the modified fatty amide (meth)acrylate monomer comprises oleic, linoleic, linolenic, or eleostearic acid.
4. The latex polymer of claim 1 wherein said ethylenically unsaturated monomer is selected from the group consisting of vinyl acetate, vinyl chloride, vinyl ester of a saturated tertiary branched carboxylic acid, acrylonitrile, acrylamide, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, glycidyl acrylate, glycidyl methacrylate, acrylic acid, methacrylic acid, butyl acrylate, butyl methacrylate, methyl methacrylate, methyl acrylate, para-acetoxystyrene, and styrene.
5. The latex polymer of claim 1 , wherein R′ of the fatty amide (meth)acrylate monomer is unsaturated.
6. The latex polymer of claim 1 , wherein R′ of the fatty amide (meth)acrylate monomer comprises unsaturated straight chain hydrocarbon groups of oleic, linoleic, linolenic or eleostearic fatty acid.
7. The latex polymer of claim l, wherein R′ of the fatty amide (meth)acrylate monomer further comprises saturated straight chain hydrocarbon groups of caprylic, capric, lauric, palmitic, or stearic fatty acid.
8. The latex polymer of claim 1 in which the aqueous dispersed fatty amide (meth)acrylate monomer contains straight chain hydrocarbon groups (R′) that are a mixture of unsaturated and saturated straight chain hydrocarbon groups derived from linseed oil, soybean oil, coconut oil, safflower oil or tung oil.
9. A method of forming a latex polymer comprising emulsion polymerizing an aqueous dispersed ethylenically unsaturated monomer suitable for forming a latex composition; and an aqueous dispersed fatty amide (meth)acrylate monomer of the formula:
wherein R=CH 3 , H or CH 2 CH 2 OH
R′=unsaturated or a mixture of unsaturated and saturated straight chain hydrocarbon groups of a fatty acid of a vegetable oil;
R″=CH 3 or H; and
U =
thereby producing a latex polymer and
wherein the fatty amide (meth)acrylate monomer diffuses through the aqueous phase of the emulsion polymerization and is completely polymerized, and does not separate from the latex, thereby ensuring long-term stability of the latex polymer, and wherein the fatty amide (meth)acrylate monomer content of the latex composition is 18 weight percent or more.
10. The method of claim 9 wherein the fatty acid of the modified fatty amide (meth)acrylate monomer is derived from linseed oil, soybean oil, coconut oil, safflower oil or tung oil.
11. The method of claim 9 wherein the fatty acid of the modified fatty amide (meth)acrylate monomer is oleic, linoleic, linolenic, or eleostearic acid.
12. The method of claim 9 wherein the ethylenically unsaturated monomer is vinyl acetate, vinyl chloride, vinyl ester of a saturated tertiary branched carboxylic acid, acrylonitrile, acrylamide, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, glycidyl acrylate, glycidyl methacrylate, acrylic acid, methacrylic acid, butyl acrylate, butyl methacrylate, methyl methacrylate, methyl acrylate, para-acetoxystyrene, or styrene.
13. The method of claim 9 wherein the R′ of the fatty amide (meth)acrylate monomer is unsaturated.
14. The method of claim 9 wherein the R′ of the fatty amide (meth)acrylate monomer is an unsaturated straight chain hydrocarbon group of oleic, linoleic, linolenic or eleostearic fatty acid.
15. The method of claim 9 wherein the R′ of the fatty amide (meth)acrylate monomer further comprises saturated straight chain hydrocarbon groups of caprylic, capric, lauric, palmitic, or stearic fatty acid.
16. The method of forming a latex polymer of claim 9 in which the aqueous dispersed fatty amide (meth)acrylate monomer contains straight chain hydrocarbon groups (R′) that are a mixture of unsaturated and saturated straight chain hydrocarbon groups derived from linseed oil, soybean oil, coconut oil, safflower oil or tung oil.