![Vinyl acetate-ethylene emulsions for nonwoven goods](/ep/1983/08/10/EP0066174A3/abs.jpg.150x150.jpg)
基本信息:
- 专利标题: Vinyl acetate-ethylene emulsions for nonwoven goods
- 专利标题(中):乙烯乙酸乙烯酯乳液用于非商品
- 申请号:EP82104320 申请日:1982-05-17
- 公开(公告)号:EP0066174A3 公开(公告)日:1983-08-10
- 发明人: Iacoviello, John Generoso
- 申请人: AIR PRODUCTS AND CHEMICALS, INC.
- 专利权人: AIR PRODUCTS AND CHEMICALS, INC.
- 当前专利权人: AIR PRODUCTS AND CHEMICALS, INC.
- 优先权: US267271 19810526
- 主分类号: C08F218/08
- IPC分类号: C08F218/08 ; D06M15/36 ; C08F210/02
摘要:
This invention relates to a vinyl acetate-ethylene copolymer containing emulsion particularly adapted for the preparation of nonwoven goods. The vinyl acetate-ethylene emulsion is prepared by an improved process for producing an aqueous emulsion suitably adapted for producing non- woven goods said emulsion containing a vinyl acetate-ethylene copolymer wherein said copolymer contains from about 75-96% by weight of vinyl acetate. It is produced by forming an aqueous suspension of vinyl acetate, ethylene, and stabilizer, initiating the polymerization of the reaction mixture by the addition of catalysts, and adding from about 0.5-10% by weight of the vinyl acetate of a crosslinkable monomer. The improvement for enhancing the absorptivity of the copolymer comprises:
pressurizing the reactor with ethylene to an initial ethylene equilibrium pressure of from about 100 to 1,000 psig; initiating the reaction mixture by the addition of catalyst at a temperature from about 10-35 = C and bringing the reaction mixture to a reaction temperature of from 45-85°C and operating pressure within a period of not more than 2 hours and the reaction temperature exceeds the initiation temperature by at least 20 c C; adding the crosslinkable monomer at a substantially uniform rate such that the major portion of monomer has been added by the time the vinyl acetate content in the emulsion has been reduced to a level of from 3-25% by weight of the emulsion; and continuing polymerization of the reaction mixture until the vinyl acetate content in said emulsion is reduced below about 1% by weight.
pressurizing the reactor with ethylene to an initial ethylene equilibrium pressure of from about 100 to 1,000 psig; initiating the reaction mixture by the addition of catalyst at a temperature from about 10-35 = C and bringing the reaction mixture to a reaction temperature of from 45-85°C and operating pressure within a period of not more than 2 hours and the reaction temperature exceeds the initiation temperature by at least 20 c C; adding the crosslinkable monomer at a substantially uniform rate such that the major portion of monomer has been added by the time the vinyl acetate content in the emulsion has been reduced to a level of from 3-25% by weight of the emulsion; and continuing polymerization of the reaction mixture until the vinyl acetate content in said emulsion is reduced below about 1% by weight.
IPC结构图谱:
C | 化学;冶金 |
--C08 | 有机高分子化合物;其制备或化学加工;以其为基料的组合物 |
----C08F | 仅用碳—碳不饱和键反应得到的高分子化合物 |
------C08F218/00 | 具有1个或更多不饱和脂族基化合物的共聚物,每个不饱和脂族基只有1个碳—碳双键,并且至少有1个是以饱和羧酸、碳酸或卤甲酸的酰氧基为终端 |
--------C08F218/02 | .一元羧酸的酯 |
----------C08F218/04 | ..乙烯基酯 |
------------C08F218/08 | ...乙酸乙烯酯 |