发明授权
- 专利标题: Water-retaining and optical-brightener-activating polymer composition, paper coating colors and sheets of coated paper thus obtained
- 专利标题(中): 保水和光学增亮剂活化聚合物组合物,由此获得的纸涂层颜色和涂布纸片
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申请号: US09900050申请日: 2001-07-09
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公开(公告)号: US06521701B2公开(公告)日: 2003-02-18
- 发明人: Jean-Bernard Egraz , Georges Ravet , Jean-Marc Suau , Isabelle Capra-Ogier , Henri Grondin
- 申请人: Jean-Bernard Egraz , Georges Ravet , Jean-Marc Suau , Isabelle Capra-Ogier , Henri Grondin
- 优先权: FR9814299 19981110
- 主分类号: C08L2904
- IPC分类号: C08L2904
摘要:
A stable aqueous liquid polymer composition, which comprises: (i) at least one polyvinyl alcohol (PVA) which has an Ostwald viscosity less than 5 mPa·s corresponding to a degree of polymerization less than 600 and a molar percentage of hydrolysis ranging from 70 to 100 measured from the ester value (DIN 53401), corresponding to a molar percentage of vinyl acetate units from 30 to 0, and (ii) at least one water-soluble polymer at neutral or alkaline pH, the composition controlling the activation of optical brighteners, water retention and viscosities of paper coating colors.
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