| 摘要 |
<p>Particle Size Distribution (PSD) of polymer produced from styrene, methylmethacrylate, vinyl chloride, diethylaminoethylmethacrylate and butyl methacrylate vinyl monomers is controlled above 60% with less than 0.1% latex production using tri-calcium phosphate (TCP) in combination with a thickening agent which is one or more: (a) hydroxyethylcellulose molecule weight 300,000 to 1,000,000; (b) hydrophobically modified hydroxyethylcellulose molecular weight 100,000 to 800,000; (c) carboxymethylmethylcellulose, carboxymethylmethylhydroxyethylcellulose or carboxymethylmethylhydroxypropylcellulose molecular weight 20,000 to 140,000. e</p> |
