| 发明名称 | Method for increasing the recyclability of a polyamide used in sintering | ||
| 摘要 | The present invention relates to a method for increasing the recyclability of a polyamide in a sintering process, wherein at least 4000 ppm of at least one acid is incorporated in the polyamide, said acid being selected from: the acids of general formula HxPyOz in which x, y and z are integers selected in the range from 1 to 7, boric acid, the salts of these acids, their esters, their anhydrides and mixtures thereof. | ||
| 申请公布号 | US9109082(B2) | 申请公布日期 | 2015.08.18 |
| 申请号 | US201213484610 | 申请日期 | 2012.05.31 |
| 申请人 | ARKEMA FRANCE | 发明人 | Mathieu Cyrille;Lemaitre Arnaud |
| 分类号 | C08L77/00;C08G69/02;B29C67/00;C08G69/04;C08J3/12;C08K3/38;C08J11/04;C08K3/24;C08K3/32 | 主分类号 | C08L77/00 |
| 代理机构 | Millen, White, Zelano & Branigan, P.C. | 代理人 | Millen, White, Zelano & Branigan, P.C. |
| 主权项 | 1. A method for increasing the recyclability of a polyamide in a sintering process, comprising incorporating 4000 to less than 10,000 ppm of at least one acid in the polyamide, said acid being an acid of formula HxPyOz in which x, y and z are integers of 1 to 7, boric acid, or a salt, ester, anhydride of these acids or a mixture thereof wherein the acid is added during treatment of the polyamide with water by contacting the polyamide in solid state with water or steam containing the acid at a temperature near its crystallization temperature Tc for a sufficient time to effect the increase, then the water or steam is separated from the polyamide and the polyamide is dried. | ||
| 地址 | Colombes FR | ||