Process for manufacturing polymers
The invention provides a method for preparing a polymer useful for treating and modifying the hair. The method for preparing a polymer composition comprising the step of (a) preparing a copolymer comprising, as polymerized monomer units, (i) 50 to 89.9 wt.% of one or more ethylenically unsaturated m...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention provides a method for preparing a polymer useful for treating and modifying the hair. The method for preparing a polymer composition comprising the step of (a) preparing a copolymer comprising, as polymerized monomer units, (i) 50 to 89.9 wt.% of one or more ethylenically unsaturated monomer and (ii) 10 to 40 wt.% of 2-acrylamide-2-methyl-1-propanesulfonic acid and salts thereof, byvarying addition of monomers (i) and (ii) with respect to time and each monomer prior to neutralizing the polymer with a base. |
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