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1. WO2021058639 - DISPERSION AQUEUSE DE PARTICULES DE POLYMÈRE ET SES UTILISATIONS EN TANT QUE COMPOSITION ADHÉSIVE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1 . An aqueous dispersion of polymer particles 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.

2. The aqueous dispersion according to claim 1 , wherein monomer a) is selected from an alkyl (meth)acrylate, 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; in particular monomer a) is selected from an alkyl (meth)acrylate and mixtures thereof; more particularly monomer a) is selected from ethyl acrylate, butyl acrylate, methyl methacrylate and mixtures thereof.

3. The aqueous dispersion according to claim 1 or 2, wherein monomer a) comprises a C1-C12 alkyl (meth)acrylate, in particular a C1-C4 alkyl (meth)acrylate, more particularly a C1-C2 alkyl (meth)acrylate.

4. The aqueous dispersion according to any one of claims 1 to 3, wherein monomer a) comprises a mixture of C1-C12 alkyl (meth)acrylates, in particular a mixture of C1-C4 alkyl (meth)acrylates, more particularly a mixture of C1-C2 alkyl (meth)acrylates.

5. The aqueous dispersion according to any one of claims 1 to 4, wherein monomer a) comprises at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100% by weight of C1-C12 alkyl (meth)acrylate based on the total weight of monomer a); in particular, monomer a) comprises at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100% by weight of C1-C4 alkyl (meth)acrylate based on the total weight of monomer a); more particularly, monomer a) comprises at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100% by weight of C1-C2 alkyl (meth)acrylate based on the total weight of monomer a).

6. The aqueous dispersion according to any one of claims 1 to 5, wherein the monomeric composition comprises 40 to 90%, in particular 45 to 85%, more particularly 50 to 80%, even more particularly 55 to 75%, more particularly still 60 to 70%, by weight of monomer a) based on the total weight of monomers a) + b) + c).

7. The aqueous dispersion according to any one of claims 1 to 6, 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; in particular monomer b) is selected from styrene, alphamethylstyrene and mixtures thereof.

8. The aqueous dispersion according to any one of claims 1 to 7, wherein the monomeric composition comprises 0.01 to 30%, in particular 0.1 to 20%, more particularly 1 to 10%, even more particularly 2 to 8%, more particularly still 3 to 7%, by weight of monomer b) based on the total weight of monomers a) + b) + c).

9. The aqueous dispersion according to any one of claims 1 to 8, wherein monomer c) comprises a carboxylic acid (-COOH) group, a carboxylate (-COO-) group, a phosphonic acid (-P(=0)(0H)2) group, a phosphonate (-P(=0)(0R)2) group, a sulfonic acid (-S(=0)20H) group, a sulfonate (-S(=0)20R) group, a phosphate (-0-P(=0)(0R)2) group, wherein each R is independently a counterion, a hydrogen atom, or an optionally substituted hydrocarbyl; in particular monomer c) is selected from (meth)acrylic acid, 2-chloroacrylic acid, vinyl phosphonic acid, vinyl sulfonic acid, p-styrene carboxylic acid, p-styrene sulfonic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, 3-butenoic acid, mesaconic acid, citraconic acid, 2-carboxyethyl acrylate, sodium 2-acrylamido-2-methyl propane sulfonate, sodium vinyl sulfonate, sodium (meth)allyl sulfonate, sodium 1-allyloxy-2-hydroxypropane sulfonate, a phosphate ester of alkyl (meth)acrylate, a phosphate ester of alkyl (meth)acrylamide, a phosphate ester of alkyl crotonate, a phosphate ester of alkyl maleate, a phosphate ester of alkyl fumarate, a phosphate diester of alkyl (meth)acrylate, a phosphate diester of alkyl crotonate, vinyl phosphate, (meth)allyl phosphate, a phosphate ester of polypropylene glycol mono(meth)acrylate, a phosphate ester of polyethylene glycol mono(meth)acrylate, a phosphate ester of polyoxyethylene allyl ether and mixtures thereof; more particularly monomer c) is selected from (meth)acrylic acid, vinyl phosphonic acid, a phosphate ester of alkyl (meth)acrylate, a phosphate ester of polypropylene glycol mono(meth)acrylate and mixtures thereof.

10. The aqueous dispersion according to any one of claims 1 to 9, wherein monomer c) comprises a mixture of a C3-C10 mono- or dicarboxylic acid monomers and a phosphorous-based acid monomer, in particular a mixture of (meth)acrylic acid and a monomer having a phosphonic acid group, a phosphonate group or a phosphate group.

11 . The aqueous dispersion according to any one of claims 1 to 9, wherein monomer c) comprises a mixture of a C3-C10 mono- or dicarboxylic acid monomer and a sulfur-based acid monomer, in particular a mixture of (meth)acrylic acid and a monomer having a sulfonic acid group or a sulfonate group.

12. The aqueous dispersion according to any one of claims 1 to 11 , wherein monomer c) comprises at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%, by weight of C3-C10 mono-or dicarboxylic acid monomer based on the total weight of monomer c); in particular, monomer c) comprises at least 50%, at least 60%, at least 70%, at least 80%, or at least 90% by weight of (meth)acrylic acid based on the total weight of monomer c); more particularly, monomer c)

comprises at least 50%, at least 60%, at least 70%, at least 80%, at least 90% by weight of methacrylic acid based on the total weight of monomer c).

13. The aqueous dispersion according to any one of claims 1 to 12, wherein the monomeric composition comprises 1 to 40%, in particular 5 to 30%, more particularly 10 to 25%, even more particularly 15 to 25%, more particularly still 20 to 25%, by weight of monomer c) based on the total weight of monomers a) + b) + c).

14. The aqueous dispersion according to any one of claims 1 to 13, wherein monomer d) is a monoethylenically unsaturated monomer comprising a dialkoxysilane or a trialkoxysilane group; in particular monomer d) is selected from 3-methacryloxypropyl tri(alkoxy)silane, methacryloxymethyl tri(alkoxy)silane, 3-methacryloxypropylmethyl di(alkoxy)silane, vinylalkyl di(alkoxy)silane, vinyl tri(alkoxy)silane and mixtures thereof; more particularly monomer d) is selected from vinyl trimethoxysilane, vinyl diimethoxymethylsilane, vinyl triethoxysilane, vinyl tripropoxysilane, vinyl triisopropoxysilane, vinyl tris(methoxyethoxy)silane, vinyl tributoxysilane, vinyl triacetoxysilane, 3-methacryloxypropyl trimethoxysilane, 3-methacryloxypropylmethyl dimethoxysilane, methacryloxymethyl trimethoxysilane, 3-methacryloxypropyl tris(2-methoxyethoxy) silane, vinyl trichlorosilane, vinyl methyldichlorosilane, vinyltris(2-methoxyethoxy)silane and mixtures thereof; even more particularly monomer d) is selected from vinyl trimethoxysilane, 3-methacryloxypropyl trimethoxysilane, 3-methacryloxypropylmethyl dimethoxysilane, methacryloxymethyl trimethoxysilane and mixtures thereof.

15. The aqueous dispersion according to any one of claims 1 to 14, wherein the monomeric composition comprises 0.001 to 10%, in particular 0.1 to 5%, more particularly 0.5 to 4%, even more particularly 1 to 4%, more particularly still 2,5 to 4%, by weight of monomer d) based on the total weight of monomers a) + b) + c).

16. The aqueous dispersion according to any one of claims 1 to 15, wherein the monomeric composition further comprises an initiator, in particular an initiator selected from ammonium persulfate, potassium persulfate, sodium persulfate and mixtures thereof.

17. The aqueous dispersion according to any one of claims 1 to 16, wherein the monomeric composition further comprises a chain transfer agent, in particular a chain transfer agent comprising a thiol group, more particularly a chain transfer agent selected from n-dodecyl mercaptan, tert-dodecyl mercaptan, isooctyl 3-mercaptopropionate or 2-ethylhexyl thioglycolate.

18. The aqueous dispersion according to any one of claims 1 to 17, wherein the monomeric composition further comprises a surfactant; in particular a surfactant selected from an anionic surfactant, a non-ionic surfactant and mixtures thereof; more particularly a surfactant selected from C6-C20 alkyl sulfate or sulfonate, C6-C20 alkyl ether sulfate or sulfonate, C6-C20 alkyl phosphate or phosphonate, C6-C20 alkyl ether phosphate or phosphonate, ethoxylated fatty alcohol (C10-C40 with an ethoxy unit number ranging from 2 to 100), ethoxy-propoxy copolymer (EO-PO copolymer) and mixtures thereof.

19. The aqueous dispersion according to any one of claims 1 to 18, wherein the polymer particles have a Tg of -10 to 50°C, in particular 0 to 40°C, more particularly 10 to 30°C.

20. A process for the preparation of an aqueous dispersion of polymer particles by emulsion polymerization of the monomeric composition as defined in any one of claims 1 to 19.

21. An adhesive composition comprising the aqueous dispersion according to any one of claims 1 to 19 or as obtained according to the process of claim 20.

22. The adhesive composition according to claim 21 , further comprising

- a polysaccharide;

- urea; and

- a base.

23. The adhesive composition according to claim 21 , further comprising

- a polysaccharide;

- casein;

- urea; and

- a base.

24. A use of the adhesive composition according to any one of claims 21 to 23, for adhering a label on a bottle, in particular a glass bottle.

25. A process for adhering a label on a bottle, wherein the process comprises applying the adhesive composition according to any one of claims 21 to 23 on a label and subsequently applying the label coated with the adhesive composition on a bottle, in particular without any intermediate drying step and/or activation with water step between the step of applying the adhesive composition on a label and the step of applying the label coated with the adhesive composition on a bottle.