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    Treatment for improving polypropylene dyeability
    17.
    发明授权
    Treatment for improving polypropylene dyeability 失效
    用于改善聚丙烯可染性的处理

    公开(公告)号：US3707351A

    公开(公告)日：1972-12-26

    申请号：US3707351D

    申请日：1970-04-17

    申请人： AMERICAN CYANAMID CO

    发明人： MECCO JERRY MICHAEL

    IPC分类号： D06M15/356 ,  D06M11/00

    CPC分类号： D06M15/3562 ,  Y10S8/909 ,  Y10S8/91 ,  Y10S8/911 ,  Y10S8/912 ,  Y10S8/928 ,  Y10S8/929 ,  Y10S8/93

    摘要： POLYPROPHYLENE FIBERS ARE DIFFICULT TO DYE. THE PRIOR ART HAS SHOWN THAT THEIR DYEABILITY IS IMPROVED TO A CERTAIN DEGREE BY THE INCORPORATION THEREIN OF MINOR AMOUNTS OF POLYMERIC VINYL PYRIDINES. IT HAS NOW EEN FOUND THAT THE DYEABILITY OF THE MODIFIED, I.E., VINYL PYRIDINE-CONTAINING POLYPROPYLENE, IS FURTHER MARKEDLY IMPROVED BY PRE-TREATMENT THEREOF WITH AN AQUEOUS COMPOSITION CONTAINING FROM ABOUT 0.25% TO ABOUT 4%, BASED ON THE WEIGHT OF THE FIBER, OF AN ANIONIC SURFACE-ACTIVE AGENT, SUCH AS SODIUM DODECYL SULFATE, AND SUFFICIENT ACID, SUCH AS SULFURIC OR FORMIC ACID, TO PROVIDE A PH NO HIGHER THAN 6 AT A TEMPERATURE OF FROM ABOUT 140 TO ABOUT 250*F. THUS, FOR EXAMPLE, WITHOUT THE PRE-TREATMENT, THE MODIFIED FIBERS ARE ONLY WEAKLY DYEABLE WITH DYES, SUCH AS SOLVENT RED 106, A SPIRIT DYE, ACID YELLOW 42, AND ACID DYE, RHODAMINE B, A BASIC DYE, AND VAT JADE GREEN, A VAT DYE; HOWEVER, WITH THE PRE-TREATMENT THE FIBERS ARE STRONGLY DYEABLE WITH THESE DYES.