发明名称 |
Water-retaining and optical-brightner-activating polymer composition, paper coating colors and sheets of coated paper thus obtained |
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.
|
申请公布号 |
US6297317(B1) |
申请公布日期 |
2001.10.02 |
申请号 |
US19990438045 |
申请日期 |
1999.11.10 |
申请人 |
COATEX S.A. |
发明人 |
EGRAZ JEAN-BERNARD;RAVET GEORGES;SUAU JEAN-MARC;CAPRA-OGIER ISABELLE;GRONDIN HENRI |
分类号 |
C08L29/04;C08L101/14;C09D129/04;D21H19/58;D21H19/60;D21H21/28;D21H21/30;(IPC1-7):C08L29/04;C08K3/18;C08K3/36;B32B23/08;B32B27/10 |
主分类号 |
C08L29/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|