PROCESS OF UNION DYEING OF POLYPROPYLENE COMPOSITION WOVEN CARPET BACKING TUFTED WITH POLYAMIDE OR POLYESTER FACE YARN

摘要

1429988 Dyeing union fabrics and carpets THIOKOL CORP 7 Aug 1973 [7 Aug 1972] 37448/73 Heading D1B Synthetic fibre mixtures comprising polyamide or polyester fibres blended with polyolefin fibres which have been treated with a C 1 to C 6 monofunctional carboxylic acid are dyed with disperse or acid dyes at pH 5 to 7, the polyamide fibres consisting of a long chain synthetic polyamide having recurring -CONH- groups in the polymer chain, the polyester being a long chain synthetic polymer composed of at least 85% by weight of an ester of a dihydric alcohol and an aromatic dicarboxylic acid, the polyolefin composition comprising 80 to 99.5% by weight of a stereoregular or isotactic polyolefin and 0.5 to 20% by weight of a basic polyamide comprising the reaction product of an aliphatic dicarboxylic acid or a functional derivative thereof and a polyamine containing not more than two primary amino groups and one or more tertiary amino groups, wherein said basic polyamide is present in an amount sufficient to provide 0.1 to 1 % by weight of basic nitrogen in the composition and said basic polyamide has a chrystallite melting point in the range of 50 to 250‹C and provided that when said synthetic fibre is a polyester fibre said dyestuff is a disperse dye. The fibre forming polyamide may be polyhexamethylene diamine or polycaprolactam. Formic acid, acetic, propionic n-butyric isobutryic, valeric, isovaleric and caproic acids may be used at 140-190‹F. Stereoregular and isotactic polyolefins may be lime or polyethylene, poly(4-methylpentene-1) and isotactic polypropylene.