Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1989-01-26
1990-02-06
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
528232, 528242, 528248, 528259, 528260, 528499, 524598, 524714, 524726, 524734, 526200, 526204, 526210, 526217, 526225, C08J 6100, C08K 0000
Patent
active
048989088
ABSTRACT:
Novel anionic polymeric hydrogels based on sulfonated amino aldehyde resins and a process for preparing such hydrogels are described. The hydrogels may include poly(N-vinyl 2-pyrrolidone) and other additives. Such hydrogels may be prepared by a four step process in which melamine and/or urea are reacted with formaldehyde, sulfonated, condensed to form a viscous gel and dried.
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Hovakeemian George
Lahalih Shawqui
Acquah Samuel A.
Kight John
Kuwait Institute for Scientific Research
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