发明名称 |
Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl trifluoroacetate/vinyl ester) in the absence of chlorofluorocarbon solvent |
摘要 |
A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifiuoroacetate) (PVTFA) is obtained in essentially quantitative yield under mild conditions by using non-chlorofluorocarbon solvents comprising siloxanes or perfluorinated fluids. Hexamethyl disiloxane is a particularly useful example of such solvents. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient commercial route to syndiotactic polyvinyl alcohol. |
申请公布号 |
US5336740(A) |
申请公布日期 |
1994.08.09 |
申请号 |
US19930152393 |
申请日期 |
1993.11.12 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
EIAN, GILBERT L. |
分类号 |
C08F2/06;C08F8/12;C08F18/04;C08F218/02;C08G77/04;(IPC1-7):C08F4/16 |
主分类号 |
C08F2/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|