发明名称 |
CRYSTALLINE POLYGLYCOLIC ACID, POLYGLYCOLIC ACID COMPOSITION AND PROCESSES FOR PRODUCTION OF BOTH |
摘要 |
A crystalline polyglycolic acid which has a difference between melting temperature (Tm) and crystallization temperature (Tc<sb>2</sb>) of 35 °C or above and a difference between crystallization temperature (Tc<sb>1</sb>) and glass transition temperature (Tg) of 40 °C or above; a process for production of polyglycolic acid modified in crystal properties which comprises subjecting crystalline polyglycolic acid to heat history at Tm plus 38 °C or above; and a polyglycolic acid composition comprising a crystalline polyglycolic acid and a heat stabilizer wherein there is a difference (T<sb>2</sb> −T<sb>1</sb>) of 5 °C or above between the temperature (T<sb>2</sb>) of the composition for 3% weight loss on heating and the temperature (T<sb>1</sb>) of the crystalline polyglycolic acid for 3 % weight loss on heating.
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申请公布号 |
WO03037956(A1) |
申请公布日期 |
2003.05.08 |
申请号 |
WO2002JP11287 |
申请日期 |
2002.10.30 |
申请人 |
KUREHA CHEMICAL INDUSTRY COMPANY, LIMITED |
发明人 |
YAMANE, KAZUYUKI;MIURA, HIROMITSU;ONO, TOSHIHIKO;NAKAJIMA, JUNJI;ITOH, DAISUKE |
分类号 |
B29C49/00;B65D1/02;C07C59/10;C08G63/08;C08G63/80;C08G63/88;C08K5/49;C08K5/527;(IPC1-7):C08G63/08;C08K3/26;C08K5/52;C08L67/04 |
主分类号 |
B29C49/00 |
代理机构 |
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代理人 |
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地址 |
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