| 发明名称 | Low formaldehyde vinyl ester/ethylene emulsion copolymers | ||
| 摘要 | A vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising at least one vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol and a free radical redox polymerization initiator system comprising i-butyl hydroperoxide as an oxidizing agent and at least one of a sulfuric acid-based compound and erythorbic acid or a salt thereof as a reducing agent. The monomer mixture comprises from 70 wt % to 95 wt % of said at least one vinyl ester and from 5 wt % to 30 wt % of ethylene based on the total weight of monomers in said mixture and the copolymer has a formaldehyde content of less than 5.0 ppmw as determined by ISO-15173. | ||
| 申请公布号 | US9567261(B2) | 申请公布日期 | 2017.02.14 |
| 申请号 | US201214396506 | 申请日期 | 2012.04.25 |
| 申请人 | CELANESE SALES GERMANY GMBH | 发明人 | McLennan Alistair;Van Boxtel Hendrikus C. M. |
| 分类号 | C04B24/26;C04B26/04;C08F22/10;C08F4/40;C08F218/08;C04B103/00;C04B111/00;C04B111/62;C08F210/02 | 主分类号 | C04B24/26 |
| 代理机构 | Roberts Mlotkowski Safran Cole & Calderon P.C. | 代理人 | Roberts Mlotkowski Safran Cole & Calderon P.C. |
| 主权项 | 1. A vinyl ester/ethylene copolymer prepared by emulsion copolymerization of a monomer mixture comprising at least one vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol and a free radical redox polymerization initiator system comprising t-butyl hydroperoxide as an oxidizing agent and at least one of a sulfinic acid-based compound as a reducing agent, wherein said monomer mixture comprises from 70 wt % to 95 wt % of said at least one vinyl ester and from 5 wt % to 30 wt % of ethylene based on the total weight of monomers in said mixture and the copolymer has a formaldehyde content of less than 5.0 ppmw as determined by ISO-15173. | ||
| 地址 | Sulzbach DE | ||