초록 ▼

The invention concerns a process for controlling the stability or the droplets sized of simple water-in-oil emulsions, wherein a di-block or tri-block copolymer is used. A block is a hydrophilic block, the other block is a hydrophobic block. The invention concerns also a stabilized water-in-oil emul

The invention concerns a process for controlling the stability or the droplets sized of simple water-in-oil emulsions, wherein a di-block or tri-block copolymer is used. A block is a hydrophilic block, the other block is a hydrophobic block. The invention concerns also a stabilized water-in-oil emulsion.

대표청구항 ▼

1. A method for stabilizing a simple water-in-oil emulsion comprising droplets of an aqueous phase dispersed in a hydrophobic phase, said method comprising the step of forming an emulsion comprising:a block copolymer comprising: (block A)-(block B) linear di-block copolymers,(block A)-(block B)-(blo

1. A method for stabilizing a simple water-in-oil emulsion comprising droplets of an aqueous phase dispersed in a hydrophobic phase, said method comprising the step of forming an emulsion comprising:a block copolymer comprising: (block A)-(block B) linear di-block copolymers,(block A)-(block B)-(block A) linear tri-block copolymers, or(block B)-(block A)-(block B) linear tri-block copolymers, anda surfactant that is different from the block copolymer;wherein:block A is a hydrophilic block, and comprises: vinyl alcohol;vinyl pyrrolidone;acrylamide;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoyibenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O—or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof;block B is a hydrophobic block, and comprises: dialkylsiloxane,vinyl versatate,vinyl acetate,vinyl nitriles, comprising from 3 to 12 carbon atoms,vinylamine amides,methylacrylate,2-ethyl-hexyl acrylate,2-ethyl-hexyl methacrylate, orcombinations thereof; andfurther wherein:block A and/or block B comprises units deriving from mono-alpha-ethylenically-unsaturated monomers. 2. The method of claim 1, wherein block A comprises: vinyl alcohol;vinyl pyrrolidone;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof. 3. The method of claim 1, wherein the amount of aqueous phase ranges from 10 to 99 weight %, relative to the weight of the hydrophobic phase, block copolymer, surfactant, and aqueous phase. 4. The method of claim 3, wherein the amount of aqueous phase ranges from 50 to 95 weight %. 5. The method of claim 1, wherein the amount of block copolymer and surfactant ranges from 0.1 to 10 weight % of the amount of aqueous phase. 6. The method of claim 5, wherein the amount of block copolymer and surfactant ranges from 0.5 to 5 weight %. 7. The method of claim 1, wherein the weight ratio between block B and block A of the block copolymer ranges from 40/60 to 95/5. 8. The method of claim 1, wherein the mixture of the block copolymer and the surfactant has an HLB of lower than or equal to 10. 9. The method of claim 1, wherein the emulsion is an explosive emulsion and wherein the hydrophilic phase comprises an oxygen-donating compound. 10. The method of claim 1, wherein the surfactant comprises a polyisobutene succinic anhydride, optionally modified, and wherein the aqueous phase comprises ammonium nitrate. 11. The method of claim 1, wherein the hydrophobic phase comprises an organic, vegetal or mineral oil, or a wax. 12. A simple water-in-oil emulsion comprising: droplets of an aqueous phase dispersed in a hydrophobic phase,a block copolymer comprising: (block A)-(block B) linear di-block copolymers,(block A)-(block B)-(block A) linear tri-block copolymers, or(block B)-(block A)-(block B) linear tri-block copolymers, anda surfactant that is different from the block copolymer;wherein: block A is a hydrophilic block, and comprises:vinyl alcohol;vinyl pyrrolidone;acrylamide;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof;block B is a hydrophobic block, and comprises: dialkylsiloxane,vinyl versatate,vinyl acetate,vinyl nitriles, comprising from 3 to 12 carbon atoms,vinylamine amides,methylacrylate,2-ethyl-hexyl acrylate,2-ethyl-hexyl methacrylate, orcombinations thereof; andfurther wherein:block A and/or block B comprises units deriving from mono-alpha-ethylenically-unsaturated monomers. 13. The emulsion of claim 12, wherein block A comprises: vinyl alcohol;vinyl pyrrolidone;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof. 14. The emulsion of claim 12, wherein the amount of aqueous phase ranges from 10 to 99 weight %, relative to the weight of the hydrophobic phase, block copolymer, surfactant, and aqueous phase. 15. The emulsion of claim 12, wherein the amount of aqueous phase ranges from 50 to 95 weight %. 16. The emulsion of claim 12, wherein the amount of block copolymer and surfactant ranges from 0.1 to 10 weight % of the amount of the aqueous phase. 17. The emulsion of claim 16, wherein the amount of block copolymer and surfactant ranges from 0.5 to 5 weight %. 18. The emulsion of claim 12, wherein the weight ratio of block B to block A of the block copolymer ranges from 40/60 to 95/5. 19. The emulsion of claim 12, wherein the mixture of the block copolymer and the surfactant has an HLB of lower than or equal to 10. 20. The emulsion of claim 12, wherein the emulsion is an explosive emulsion, and wherein the aqueous phase comprises an oxygen-donating compound. 21. The emulsion of claim 12, wherein the surfactant is a polyisobutene succinic anhydride, optionally modified, and wherein the aqueous phase comprises ammonium nitrate. 22. The emulsion of claim 12, wherein the hydrophobic phase comprises an organic, vegetal, or mineral oil, or a wax. 23. The emulsion of claim 1, wherein said block copolymer is a (block A)-(block B) linear di-block copolymer. 24. The emulsion of claim 12, wherein said block copolymer is a (block A)-(block B) linear di-block copolymer. 25. A method for stabilizing a simple water-in-oil emulsion comprising droplets of an aqueous phase dispersed in a hydrophobic phase, said method comprising the step of forming an emulsion comprising:a block copolymer comprising a (block A)-(block B) linear di-block copolymer, anda surfactant that is different from the block copolymer, wherein: block A comprises acrylic acid, andblock B comprises butyl acrylate, andfurther wherein said emulsion is less than 5% coalesced after one month at 20° C. 26. A simple water-in-oil emulsion comprising: droplets of an aqueous phase dispersed in a hydrophobic phase,a block copolymer comprising a (block A)-(block B) linear di-block copolymer, anda surfactant that is different from the block copolymer, wherein: block A comprises acrylic acid, andblock B comprises butyl acrylate, andfurther wherein said emulsion is less than 5% coalesced after one month at 20° C. 27. A method for stabilizing a simple water-in-oil emulsion comprising droplets of an aqueous phase dispersed in a hydrophobic phase, said method comprising the step of forming an emulsion comprising:a block copolymer comprising: (block A)-(block B) linear di-block copolymers,(block A)-(block B)-(block A) linear tri-block copolymers, or(block B)-(block A)-(block B) linear tri-block copolymers, anda surfactant that is different from the block copolymer;wherein:block A is a hydrophilic block, and comprises: vinyl alcohol;vinyl pyrrolidone;acrylamide;acrylic acid;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof;block B is a hydrophobic block, and comprises: dialkylsiloxane,vinyl versatate,vinyl acetate,vinyl nitriles, comprising from 3 to 12 carbon atoms,vinylamine amides,methylacrylate,2-ethyl-hexyl acrylate,butyl acrylate;2-ethyl-hexyl methacrylate, orcombinations thereof; andfurther wherein:block A and/or block B comprises units deriving from mono-alpha-ethylenically-unsaturated monomers. 28. The method of claim 27, wherein block A comprises: vinyl alcohol;vinyl pyrrolidone;acrylic acid;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof. 29. The method of claim 27, wherein block A comprises acrylic acid. 30. The method of claim 27, wherein block B comprises butylacrylate. 31. The method of claim 27, wherein block A comprises acrylic acid and block B comprises butylacrylate. 32. The method of claim 28, wherein block A comprises acrylic acid. 33. The method of claim 28, wherein block B comprises butylacrylate. 34. The method of claim 28, wherein block A comprises acrylic acid and block B comprises butylacrylate. 35. A simple water-in-oil emulsion comprising: droplets of an aqueous phase dispersed in a hydrophobic phase,a block copolymer comprising: (block A)-(block B) linear di-block copolymers,(block A)-(block B)-(block A) linear tri-block copolymers, or(block B)-(block A)-(block B) linear tri-block copolymers, anda surfactant that is different from the block copolymer;wherein: block A is a hydrophilic block, and comprises:vinyl alcohol;vinyl pyrrolidone;acrylic acid;acrylamide;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof;block B is a hydrophobic block, and comprises: dialkylsiloxane,vinyl versatate,vinyl acetate,vinyl nitriles, comprising from 3 to 12 carbon atoms,vinylamine amides,methylacrylate,2-ethyl-hexyl acrylate,butylacrylate,2-ethyl-hexyl methacrylate, orcombinations thereof; andfurther wherein:block A and/or block B comprises units deriving from mono-alpha-ethylenically-unsaturated monomers. 36. The emulsion of claim 35, wherein block A comprises: vinyl alcohol;vinyl pyrrolidone;acrylic acid;methacrylamide;hydroxyalkylesters of alpha-ethylenically-unsaturated monocarboxylic acids;hydroxyalkylamides of alpha-ethylenically-unsaturated monocarboxylic acids;ethylenimine;vinylamine;trimethylammonium ethyl acrylate chloride;trimethylammonium ethyl acrylate methyl sulfate;dimethylammonium ethyl (meth)acrylate benzyl chloride;4-benzoylbenzyl dimethylammonium ethyl acrylate chloride;trimethyl ammonium ethyl (meth)acrylamido (also called 2-(acryloxy)ethyltrimethylammonium, TMAEAMS) chloride;trimethyl ammonium propyl (meth)acrylamido chloride;vinylbenzyl trimethyl ammonium chloride;diallyldimethyl ammonium chloride;alpha-ethylenically-unsaturated monomers comprising a phosphate or phosphonate group;monoalkylesters of alpha-ethylenically-unsaturated dicarboxylic acids;monoalkylamides of alpha-ethylenically-unsaturated dicarboxylic acids;alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;salts of alpha-ethylenically-unsaturated compounds comprising a sulfonic acid group;2-hydroxyethylacrylate;vinyl sulfonic acid;salts of vinyl sulfonic acid;vinylbenzene sulfonic acid;salts of vinylbenzene sulfonic acid;alpha-acrylamidomethylpropanesulfonic acid;salts of alpha-acrylamidomethylpropanesulfonic acid 2-sulfoethyl methacrylate;salts of 2-sulfoethyl methacrylate;acrylamido-2-methylpropanesulfonic acid (AMPS);salts of acrylamido-2-methylpropanesulfonic acid;styrenesulfonate (SS);monomers having the formula: wherein R1 is a hydrogen atom or a methyl or ethyl group;R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6 alkyl, hydroxyalkyl or aminoalkyl groups;m is an integer from 1 to 10;n is an integer from 1 to 6;Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom;A represents a (CH2)p group, p being an integer from 1 to 6;B represents a linear or branched C2-C12 polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, optionally substituted by one or more hydroxyl or amino groups; andX, which are identical or different, represent counterions;or,combinations thereof. 37. The emulsion of claim 35, wherein block A comprises acrylic acid. 38. The emulsion of claim 35, wherein block B comprises butylacrylate. 39. The emulsion of claim 35, wherein block A comprises acrylic acid and block B comprises butylacrylate. 40. The emulsion of claim 36, wherein block A comprises acrylic acid. 41. The emulsion of claim 36, wherein block B comprises butylacrylate. 42. The emulsion of claim 36, wherein block A comprises acrylic acid and block B comprises butylacrylate.