Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-03-07
1998-07-21
Reddick, Judy M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
524803, 525 57, 525 60, 525 61, C08F 800
Patent
active
057836280
ABSTRACT:
A modified polyvinyl alcohol is disclosed, which comprises the following structural units (I) and (II) and has a weight average molecular weight of from 3,000 to 400,000: ##STR1## wherein R.sup.1 represents H or CH.sub.3 ; and M.sup.1 represents H, an alkali metal, ammonium, alkylammonium, or alkanolammonium. The modified polyvinyl alcohol may be sulfonated. The modified polyvinyl alcohol is used as a dispersant such as a drilling fluid additive.
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Kawamori Yoshihiro
Kitada Akira
Mori Yoshiyuki
Nishiguchi Hiroshi
Yada Akira
Dai-Ichi Kogyo Seiyaku Co. Ltd.
Reddick Judy M.
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