发明名称 |
Biodegradable cellulose ester composition and article |
摘要 |
The composition comprising a cellulose ester including at least 10 weight % of a low-substituted cellulose ester having an average degree of substitu- tion not exceeding 2.15 and giving a 4-week decomposition rate of at least 60 weight % as determined using the amount of evolution of carbon dioxide as an indicator in accordance with ASTM 125209-91. The composition may contains a plasticizer, an aliphatic polyester, a photolysis accelerator such as anatase type titanium dioxide or a biodegradation accelerator such as organic acids and their esters. The low-substituted cellulose ester may be a cellulose ester having an average degree of polymerization from 50 to 250, an average degree of substitution from 1.0 to 2.15 and a residual alkali metal/alkaline earth metal-to-residual sulfuric acid equivalent ratio of 0.1 to 1.1. The biodegradable cellulose ester composition is suitable for the manufacture of various articles including fibrous articles such as tobacco filters.
|
申请公布号 |
US5720803(A) |
申请公布日期 |
1998.02.24 |
申请号 |
US19960701692 |
申请日期 |
1996.08.22 |
申请人 |
DAICEL CHEMICAL INDUSTRIES, LTD. |
发明人 |
ITOH, MASANORI;KIYOSE, ATSUNOBU;HIRAO, KATSUMI |
分类号 |
A24D3/10;C08L1/10;C08L1/12;C08L67/00;(IPC1-7):C08L1/08 |
主分类号 |
A24D3/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|