| 摘要 |
Crosslinked, preferably acrylic, preferably melamine crosslinking, polymer particles characterized in that the particles are formed by reactions comprising free radical addition polymerization of: (a) between about 0.5 and about 20 weight percent each of first and second monomers wherein said first monomer bears ethylenic unsaturation and functionality capable of crosslinking reaction with the other functionality present on the second monomer bearing multiple other functionalities and bearing no ethylenic unsaturation; and (b) between about 99 and about 60 weight percent of at least one other monethylenically unsaturated monomer; in the presence of (I) an organic liquid which is a solvent for the polymerizable monomers, but a non-solvent for the resultant polymer, and (II) polymeric dispersion stabilizer wherein the reaction is carried out at elevated temperatures such that the dispersion polymer forms and then is crosslinked. The stabilizer comprises the reaction product of an acrylic polymer-hydrocarbon molecule adduct having hydroxyl functionality with unsaturated monoisocyanate.
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