Title:
METHOD FOR PREPARING CONTROLLED-RELEASE CRYSTALLIZED POLYTRIMETHYLENE TEREPHTHALATE
Document Type and Number:
WIPO Patent Application WO/2011/131056
Kind Code:
A1
Abstract:
A method is disclosed herein, for the preparation of controlled-release crystallized polytrimethylene terephthalate. This procedure reduces crystallisation rate and crystallinity-saturation ratio of polytrimethylene terephthalate during spinning, through the addition of a third monomer during the esterification reaction step. This third monomer acts as copolymerisation component generating intermolecular steric hindrance; the identity of which selects from one or more as combinations of the following: trimellitic anhydride, non-para aromatic dicarboxylic acid, C4~C10 aliphatic dicarboxylic acid containing branched chains or cycloalkyl groups, and C3-C10 aliphatic dihydric alcohol having branched chains or cycloalkyl groups. The molar ratio of carboxyl groups to hydroxyl groups is 1:1.16~1.85, with the third monomer constituting 0.5%~6.5% of the total weight of the starting materials.
Inventors:
BIAN, Shuchang (Meiyan Economic Development Zone, PingwangWujiang, Jiangsu 5, 215225, CN)
Application Number:
CN2011/071211
Publication Date:
October 27, 2011
Filing Date:
February 23, 2011
Export Citation:
Assignee:
JIANGSU ZHONGLU TECHNOLOGY DEVELOPMENT CO., LTD (Meiyan Economic Development Zone, PingwangWujiang, Jiangsu 5, 215225, CN)
江苏中鲈科技发展股份有限公司 (中国江苏省吴江市平望镇梅堰经济开发区, Jiangsu 5, 215225, CN)
江苏中鲈科技发展股份有限公司 (中国江苏省吴江市平望镇梅堰经济开发区, Jiangsu 5, 215225, CN)
International Classes:
C08G63/183; C08G63/199; D01F6/84
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (No. 93 Ganjiang West Road, Suzhou, Jiangsu 2, 215002, CN)
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