CS262637B1 - Mixture for preparing dyeable polyolefin fibers and other polyolefin products - Google Patents

Abstract

The solution falls into the field of processing of plastic substances. It solves the composition of a mixture for the preparation of dyeable materials with improved sorption properties based on polyolefin or a mixture of polyolefins. The mixture consists by weight of 70 to 90% of polyolefin or a mixture of polyolefins and 2 to 30% of a mixture of ethylene-vinyl acetate copolymer and ethylene-propylene copolymer with an ethylene-vinyl acetate copolymer content of 1.5 to 28% and an ethylene-propylene copolymer content of 0.5 to 8%.

Description

262637 2

The invention relates to a composition for the preparation of dyeable polyolefin fibers and other polymeric articles with improved sorption properties. At present, the dyeing of polyolefin fibers and other polymeric products is accomplished by dyeing in color using color pigments. However, surface-diffusion-based acidic, metal-complexing and alkaline dyes are also used. This requires that modifiers be added to the polymer and thus form a composition which has the ability to stain with the surface, i.e., bind the dyes in the dyeing operation. The preparation of diffuse (surface) dyeable modified polyolefin fibers is of great importance for the textile industry, which rapidly changes its color requirements and often requires only a very small amount of them. Preparing these small amounts of pigment by dyeing is disadvantageous because, when changing from one color to another, a transition color material is produced in the intermediate phase. Also, blending the desired shade with pigmentation requires many pigment blends to be tested.

The modifier must satisfy a variety of claims such as: sufficient thermal stability at polymer processing temperatures, polymer compatibility, non-toxicity, ability to bind the dye used, diffusion stability in the fiber. The high molecular weight modifiers used in the acid and metal complex dye polymers are basic types containing amino groups in the chain, or other basic groups such as: ethylene / amino acrylate copolymer (Europatent EP 39 207), polyethyleneimine (Fr 1 446 285), polyamides containing piperazine and derivatives thereof (Ger. Offen 2 832 218, Jap. Pat. 41 777/73, Jap. Pat. 84 853/73, U.S. Pat. No. 234,251). polyamides containing, outside the group (Jap. Pat. 42 733/72), modified polyamides (U.S. Pat. No. 170,927), basic nitrogen polycondensates (U.S. Pat. No. 3,475,518), polyamine modified ethylene-maleic anhydride copolymer (Fr. 2 123 904).

These modifiers bind acidic or metal-complex dyes.

The above drawbacks are substantially eliminated by the inventive bleaching polyolefin fiber composition, which consists of 70-98% by weight of the composition. % of polyolefin or a mixture of polyolefins and 2 to 30 wt. mixtures of an ethylene-vinyl acetate copolymer and an ethylene-propylene copolymer with an ethylene-vinyl acetate copolymer content of 1.5 to 28 wt. and with an ethylene-propylene copolymer content of 0.5 to 8% by weight, wherein the amount of vinyl acetate in the ethylene vinyl acetate copolymer is 6 to 23% by weight. and the flow index of the copolymer is 1 to 5 g / 10 min and the amount of ethylene in the ethylene-propylene copolymer is 15.4% by weight.

In contrast to the prior art dyeing in which a basic modifier is added to the polymeric system and is dyed with surface acidic or metal-complex dyes, the modifier-copolymer according to the invention is also capable of binding other types of dyes, for example dispersing, reactive and the like. In addition, the sorption properties of dyed polyolefin fibers are also improved. Example 1 was 92.3% of melts. % polypropylene, 6 wt. % ethylene-vinyl acetate copolymer (vinyl acetate content of 10.5% by weight) and 1.7% by weight; the ethylene-propylene copolymer is co-melted in an extruder (30 mm) at 190-240 ° C. A homogeneous polymer blend is prepared in the form of a tape, foil, or other article having conventional mechanical properties. To prepare the fibers, the mixture is prepared in the form of granules so that the extruded line is cooled with water and chopped. A modified polypropylene fiber is prepared from the dried granules by conventional extrusion techniques. The products thus prepared are stained in a dyeing bath containing 1 kg.m dispersion -3-dye Ostacet brilliant red E-LB, 1 kg.m Cortamol NNO, 2 kg.m SpolaprenuX,

Claims (1)

OBJECT OF THE INVENTION Mixture for the preparation of dyable polyolefin fibers and other polyolefin products with improved sorption properties, characterized in that it consists of 70 to 98% by weight of polyolefin or a mixture of polyolefins and the remainder is a mixture of 1.5 to 28% ethylene-vinyl acetate copolymer and 0.5 to 8% % of the ethylene-propylene copolymer, wherein the amount of vinyl acetate in the ethylene-vinyl acetate copolymer is 6 to 23 wt. and the flow index of the copolymer is 1 to 5 g / 10 min, preferably 2 to 3 g / 10 min. and the amount of ethylene in the ethylene-propylene copolymer is 15.4% by weight.