Back to results
US 8,524,216 B2Granted
Sterilizing polymer and method of preparation thereof
AssigneeQingdao Continent Pharmaceutical Co. Ltd.
InventorsShengzhang Yin, Qiaoleng Wang, Zhiyong Zhang
Life of this patent
Estimating the term…
Abstract
The present invention provided a polymer and a method for preparing the polymer, wherein the polymer was a terpolymer having a molecular weight of more than 1000, and copolymerized by acrolein, acrylic acid, and low alkene-alkyl dibasic acid or low-alkene-alkyl polybasic acid.
Claims14
A terpolymer comprising repeating units selected from the group consisting of:
- wherein m and n are independently selected from integers equal to or greater than 1, and R is COOH, wherein the polymer has a molecular weight from about 1000 to about 10,000, wherein the repeating units are derived from acrylic acid, acrolein and fumaric acid, wherein the mole ratio of acrylic acid:acrolein:fumaric acid is 55-85:10-35:5-10;
- wherein said terpolymer is prepared by a method comprising the steps of:
- (i) reacting acrylic acid, acrolein and fumaric acid in methanol,
- (ii) heating to reflux under nitrogen, and
- (iii) drying under vacuum to form the terpolymer.
2 more elements
A method of preparing a terpolymer comprising repeating units selected from the group consisting of:
- wherein m and n are independently selected from integers equal to or greater than 1, and R is COOH, wherein the polymer has a molecular weight from about 1000 to about 10,000, wherein the repeating units are derived from acrylic acid, acrolein and fumaric acid, wherein the mole ratio of acrylic acid:acrolein:fumaric acid is 55-85:
- 10-35:5-10;
- said method comprising the steps of:
- (i) reacting acrylic acid, acrolein, and fumaric acid with methanol;
- (ii) heating to reflux under nitrogen;
- and
- (iii) drying under vacuum to form the terpolymer.
4 more elements
Dependencies are inferred from the claim text.