发明授权
- 专利标题: Process for emulsion polymerization
- 专利标题(中): 乳液聚合方法
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申请号: US665787申请日: 1984-10-29
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公开(公告)号: US4859751A公开(公告)日: 1989-08-22
- 发明人: Joachim Schulze , Klaus Adler , Manfred Selig , Peter Ball , Klaus Marquardt , Otmar Killermann , Manfred Hannebaum
- 申请人: Joachim Schulze , Klaus Adler , Manfred Selig , Peter Ball , Klaus Marquardt , Otmar Killermann , Manfred Hannebaum
- 申请人地址: DEX
- 专利权人: Wacker-Chemie GmbH
- 当前专利权人: Wacker-Chemie GmbH
- 当前专利权人地址: DEX
- 优先权: DEX3344242 19831207
- 主分类号: C08L27/00
- IPC分类号: C08L27/00 ; C04B24/26 ; C04B26/04 ; C08F2/20 ; C08F2/24 ; C08F6/00 ; C08F6/06 ; C08F6/14 ; C08F10/00 ; C08F210/02 ; C08F214/06 ; C08J3/12 ; C08K3/34 ; C08L1/00 ; C08L27/06 ; C08L29/00 ; C09D127/04 ; C09J127/04
摘要:
A novel process for the preparation of a readily dispersible, pourable dispersion powder comprising emulsion polymerizing in the presence of a free radial initiator a mixture of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of (a) 60 to 100% by weight of vinyl chloride, (b) 0 to 40% by weight of monoethylically unsaturated, oil-soluble monomers, (c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and (d) 0 to 5% by weight of oil-soluble monomers that are monoethylenically unsaturated and have functional groups or are multiple ethylenically unsaturated and optionally a protective colloid and/or emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethyelene copolymer, optionally adding to the aqueous dispersion (e) 0 to 40% by weight, based on the VCE-polymer, of at least one water-soluble substance having a T.sub.g .gtoreq.60.degree. C., (f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and (g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible, pourable powder of a vinyl chloride-ethylene copolymer and the powder produced by the said process and improved coatings, paints, glues and adhesives containing the said redispersible powder.
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