Aqueous dispersion of polymer particles and uses thereof as an adhesive composition
The present invention relates to an aqueous dispersion of polymer particles and its preparation process, to an adhesive composition comprising the aqueous dispersion and to the use of the adhesive composition for adhering a label on a bottle.
1 . An adhesive composition comprising:
an aqueous dispersion of polymer particles;
a polysaccharide;
urea; and
a base,
wherein the aqueous dispersion of polymer particles is obtained from a monomeric composition comprising:
a) a non-ionic aliphatic monoethylenically unsaturated monomer;
b) a non-ionic styrenic monomer;
c) an ethylenically unsaturated monomer comprising an acidic group and salts thereof, and
d) an ethylenically unsaturated monomer comprising a silane group, and
wherein the monomer a) comprises at least 50% by weight of C1-C4 alkyl (meth) acrylate based on the total weight of the monomer a).
2 . The adhesive composition according to claim 1 , further comprising
casein.
3 . A process for adhering a label on a bottle, wherein the process comprises applying the adhesive composition according to claim 1 on a label and subsequently applying the label coated with the adhesive composition on a bottle.
4 . The adhesive composition according to claim 1 , wherein monomer a) further comprises a monomer selected from a hydroxyalkyl (meth) acrylate, an optionally substituted (meth) acrylamide, (meth) acrylonitrile, a conjugated diene, an alpha-olefin, a vinyl ester, a vinyl ether, a vinyl halide, and mixtures thereof.
5 . The adhesive composition according to claim 1 , wherein monomer a) comprises a mixture of C1-C4alkyl (meth) acrylates.
6 . The adhesive composition according to claim 1 , wherein the monomeric composition comprises 40% by weight to 90% by weight of monomer a) based on the total weight of monomers a)+b)+c).
7 . The adhesive composition according to claim 1 , wherein monomer b) is selected from styrene, alpha-methylstyrene, tert-butylstyrene, ortho-, meta-, and para-methylstyrene, ortho-, meta-and para-ethylstyrene, o-methyl-p-isopropylstyrene, p-chlorostyrene, p-bromostyrene, o,p-dichlorostyrene, o,p-dibromostyrene, ortho-, meta-and para-methoxystyrene, optionally substituted indenes, optionally substituted vinylnaphthalenes, acenaphthylene, diphenylethylene, vinyl anthracene and mixtures thereof.
8 . The adhesive composition according to claim 1 , wherein the monomeric composition comprises 0.01% by weight to 30% by weight of monomer b) based on the total weight of monomers a)+b)+c).
9 . The adhesive compositon to claim 1 , wherein monomer c) comprises a carboxylic acid (—COOH) group, a carboxylate (—COO − ) group, a phosphonic acid (—P(═O)(OH) 2 ) group, a phosphonate (—P(═O)(OR) 2 ) group, a sulfonic acid (—S(═O) 2 OH) group, a sulfonate (—S(═O) 2 OR) group, a phosphate (—O—P(═O)(OR) 2 ) group, wherein each R is independently a counterion, a hydrogen atom, or an optionally substituted hydrocarbyl and mixtures thereof.
10 . The adhesive composition according to claim 1 , wherein monomer c) comprises a mixture of a C3-C10 mono-or dicarboxylic acid monomers and a phosphorous-based acid monomer.
11 . The adhesive composition according to claim 1 , wherein monomer c) comprises a mixture of a C3-C10 mono-or dicarboxylic acid monomer and a sulfur-based acid monomer.
12 . The adhesive composition according to claim 1 , wherein monomer c) comprises at least 50% by weight of C3-C10 mono-or dicarboxylic acid monomer based on the total weight of monomer c).
13 . The adhesive composition according to claim 1 , wherein the monomeric composition comprises 1% by weight to 40% by weight of monomer c) based on the total weight of monomers a)+b)+c).
14 . The adhesive composition according to claim 1 , wherein monomer d) is a monoethylenically unsaturated monomer comprising a dialkoxysilane or a trialkoxysilane group and mixtures thereof.
15 . The adhesive composition according to claim 1 , wherein the monomeric composition comprises 0.001% by weight to 10% by weight of monomer d) based on the total weight of monomers a)+b)+c).
16 . The adhesive composition according to claim 1 , wherein the monomeric composition further comprises an initiator and mixtures thereof.
17 . The adhesive composition according to claim 1 , wherein the monomeric composition further comprises a chain transfer agent.
18 . The adhesive composition according to claim 1 , wherein the monomeric composition further comprises a surfactant and mixtures thereof.
19 . The aqueous dispersion adhesive composition according to claim 1 , wherein the polymer particles have a Tg of −10° C. to 50° C.
20 . The adhesive composition according to claim 1 , wherein the adhesive composition does not need to be activated by water, moisture, light and/or heat to exhibit adhesive properties.