| 摘要 |
<p>Powder coating and molding resins, compounds prepared from polyvinyl halide or polyvinylidene halide resin powders are disclosed. The resins are made by a particular suspension process, formulated and coated on articles or molded thereby exhibiting good fusion characteristics and low or no orange peel after application by conventional molding and coating methods. The powder resins have an average particle size in the range of from about 35 microns to about 150 microns, preferably 50 microns to 130 microns. The resins are polymerized in the presence of a protective colloidal system comprising an ion sensitive polymer which is disrupted during the early phase of the polymerization, before about 50%, preferably about 20% monomer conversion. The disruption is effected by introducing an ionic material which causes the colloidal layer to substantially separate from the growing resin particle, thereby removing all or substantially all of the protective colloidal residue from the suspended polymerizing particles.</p> |
