Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From sulfur-containing reactant
Patent
1998-12-22
2000-08-15
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From sulfur-containing reactant
528377, 528391, 525212, 525206, 525218, 525296, 5253285, 5253294, C08G 7500, C08L 3314, C08L 4100, C08F 2800, C08F22800
Patent
active
061038652
ABSTRACT:
There are disclosed pH-sensitive polymers containing sulfonamide groups, which can be changed in physical properties, such as swellability and solubility, depending on pH and which can be applied for a drug-delivery system, bio-material, sensor, etc, and a preparation method therefor. The pH-sensitive polymers are prepared by introduction of sulfonamide groups, various in pKa, to hydrophilic groups of polymers either through coupling to the hydrophilic groups, such as acrylamide, N,N-dimethylacrylamide, acrylic acid, N-isopropylacrylamide, etc, of polymers or copolymerization with other polymerizable monomers. These pH-sensitive polymers may have a structure of linear polymer, grafted copolymer, hydrogel or interpenetrating network polymer.
REFERENCES:
patent: 4546062 (1985-10-01), Bronstein-Bonte et al.
Bae You Han
Park Sang Yeob
Kwangju Institute of Science and Technology
Truong Duc
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