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
1989-01-30
1990-09-04
Kulkosky, Peter F.
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...
524780, 524783, 524784, 524785, 524786, 524789, 524430, 526240, 526 95, 525381, 525382, C08K 322, C08F 832
Patent
active
049545620
ABSTRACT:
Improved water-absorbing, crosslinked acrylate resins are prepared by aqueous polymerization of (A) acrylic acid neutralized 70 to 100 mole percent for example with ammonia and/or caustic alkali and/or an amine; with (B) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (B); (C) styrene, in an amount of 0% to 25% based on the weight of acrylic acid or acrylate; and (D) a water miscible or a water soluble polyvinyl monomer in the presence of (E) a metal oxide, such as titanium dioxide, in an amount of 0.001% to 5% based on the total weight of (A), (B), (C), (D) and (E), such that the amount of (D) is 0.001 to 0.6 weight percent based on the total weight of (A), (B), (C), (D) and (E). In addition, surface treating the water-absorbing crosslinked acrylate resins with a polyquaternary amine substantially further increases both the rate of water absorption and the quantity of water absorbed and retained by the metal oxide-containing resin. The untreated and the surface-treated resins also maintain the necessary "dry feel" required for most applications.
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patent: 4552938 (1985-11-01), Mikita et al.
patent: 4612250 (1986-09-01), Takedo et al.
patent: 4794140 (1988-12-01), Alexander
American Colloid Company
Kulkosky Peter F.
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