| 发明名称 |
MATERIALI DI CONFEZIONAMENTO DOTATI DI ECCELLENTE RESISTENNZA ALLA PERMEAZIONE DI ECCELENTE DI GAS E PROCEDIMENTO PER LA LORO PREPARAZIONE |
| 摘要 |
1489635 Heat treating polymers TOYO SEIKAN KAISHA Ltd 3 March 1975 8809/75 Heading C3P [Also in Division B5] An ethylene-vinyl alcohol copolymer having a vinyl alcohol content (X) of 50-75 mole per cent is heated at a temperature (Y 3 ) given by the relationship: for a time in minutes (t) given by: The resulting polymer has a main endothermic peak (in differential thermal analysis) at a temperature (Y 1 ) substantially of and a subsidiary endothermic peak at a temperature (Y 2 ) given by: The polymer can contain units of a comonomer such as propylene. The polymers have improved gas permeation resistance and can be used as packaging material. |
| 申请公布号 |
IT1055983(B) |
申请公布日期 |
1982.01.11 |
| 申请号 |
IT19760020296 |
申请日期 |
1976.02.18 |
| 申请人 |
TOYO SEIKAN KAISHA LTD |
发明人 |
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| 分类号 |
C08L23/00;A22C13/00;A23B4/00;A23B7/00;A23B7/12;A23D9/06;A23L3/00;A23L27/60;B29C49/22;B29C63/00;B29C71/00;B29C71/02;B32B27/28;B32B27/30;B32B27/32;B32B37/00;B32B37/06;B32B37/15;B65B55/02;B65D1/00;B65D65/00;B65D65/38;B65D65/40;B65D81/24;B65D85/72;C08J5/18;C08L7/00;C08L21/00;C08L29/04;C08L33/00;C08L33/02;C08L51/00;C08L51/02;C08L67/00;C08L77/00;C08L101/00 |
主分类号 |
C08L23/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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