Carpets having a back-coating of in situ-formed polyurethane |
|||||||
| 申请号 | US3664863D | 申请日 | 1969-05-19 | 公开(公告)号 | US3664863A | 公开(公告)日 | 1972-05-23 |
| 申请人 | SCHOLTEN RESEARCH NV; | 发明人 | DIJKHUIZEN WILLEM; BEERSMA PIETER JOHANNES ADRIAN; | ||||
| 摘要 | Carpets are back-coated with essentially non-cellular elastomeric polyurethanes, formed and cured in situ at ambient temperature from a mixture of selected polyether-polyols, selected polyisocyanates and catalyst. | ||||||
| 权利要求 | 2. The carpet according to claim 1 in which the polyether-polyol also contains primary hydroxyl groups and has been obtained by an acid catalysed addition of one or more alkylene oxides having from three to four carbon atoms to one or more polyhydroxyl compounds having from three to nine hydroxyl groups. 3. The carpet according to claim 1 in which the polyether-polyol also contains primary hydroxyl groups and has been obtained by capping a polyether-polyol which contains strictly secondary hydroxyl groups with ethylene oxide. 4. The carpet according to claim 1 in which the alkylene oxide is propylene oxide. 5. The carpet according to claim 1 in which the polyhydroxyl compound contains a cyclic nucleus. 6. The carpet according to claim 5 in which the polyhydroxyl compound is a glycoside, a monosaccharide or a polysaccharide. 7. The carpet according to claim 1 in which the polyisocyanate is 4,4''-diphenylmethane diisocyanate. 8. The carpet according to claim 1 in which the ratio between NCO-groups and OH-groups is from about 1.01 to about 1.20 : 1. 9. The carpet according to claim 1 in which the intimate mixture of one or more polyether-polyols, polyisocyanates and catalysts is allowed to cure at ambient temperature. 10. The carpet according to claim 1 in which the intimate mixture of one or more polyether-polyols, polyisocyanates and catalysts also contains a water scavenger. 11. Back-coated carpets according to claim 1, tufted with average tuft bond of at least 6.2 kg per loop. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈