William R. Busler - Park Forest IL Donald G. Robinson - Clarendon Hills IL
Assignee:
Nalco Chemical Company - Oak Brook IL
International Classification:
E02B 302
US Classification:
61 1R
Abstract:
Porous substrata of small bodies of non-flowing waters are contacted with acrylic acid polymers, having at least 20 percent by weight acrylate, to retard excess water loss due to seepage.
Eric H. Larson - Freehold NJ Manilal Dahanayake - Princeton Junction NJ William R. Busler - Howell NJ
Assignee:
SNF S.A. - Saint-Etienne Cedex
International Classification:
C08F 1228
US Classification:
524827
Abstract:
Improved water soluble vinyl addition polymers for use as thickening and flocculating agents in water purification treatment, paper manufacture and waste water treatment are prepared using alkoxylated castor oil as an activation release agent. The release agent is biodegradable thereby making the overall product process more environmentally friendly.