CS220957B1 - Color concentrates with improved dispersion of polyolefin-based pigments - Google Patents

Abstract

Color concentrates with improved dispersion of pigments based on polyolefins, suitable for dyeing polyolefin fibers in bulk, consist of polyolefin as a carrier in an amount of 99.4 to 60 wt. %, pigment in an amount of 0.5 to 30 wt. % and 0.1 to 10 wt. % of esters of fatty acids with 8 to 22 carbon atoms in the chain and polyhydric alcohols with a free hydroxyl group and optionally also sitabilizers or other additives modifying the properties of the fibers.

Description

220957 3

BACKGROUND OF THE INVENTION The present invention relates to color concentrates by improving the dispersion of pigments onto the polyolefin-dyed polyolefin fibers in bulk.

The essence of the dyeing of synthetic fibers in the mass is the dispersion of suitable pigmentates in the polymer. The degree of dispersion depends on the quality of the product, the molding or the fiber as well as the yield of the pigment used and the course of processing the dyed polymer of the article. Fibers and films are the most suitable for the quality of dispersion of pigments in the polymer. The degree of dispersion of the pigments depends on the quality of the pigments and the conditions of their dispersion. A very important factor is the properties of the carrier, which can be influenced by various additives, by the positive affinity for the degree of pigment dispersion. In practice, polyethylene glycols, waxes, paraffins, oils and others are used.

We have found that a very effective agent for improving the dispersion of pigments in the polymeric carrier, and then the pigment concentrates in the base polymer, are the fatty acid esters of 8 to 22 carbon atoms in the chain and the polyvalent fatty alcohols with free hydrosubstitution. xyl groups, thus also in the case of styrene, all the alcoholic groups of the ester are acidic residues. The effect of the addition of the fatty acid ester of the higher alcohol is manifested in particular in the higher concentration of the pigments in the concentration or the base polymer.

Color concentrates with improved dispersion of piolyolefin-based pigments, most notably polyolefin fibers in weight according to the invention, consist of 99.4 to 60% by weight. % polyolefin, 0.5 to 30 wt. % pigments and 0.1 to 10 wt. ester fatty acids having from 8 to 22 carbon atoms and chain-linked alcohols with a free hydroxy group. The efficacy of fatty acid esters of fatty alcohols is manifested in particular by higher pigment concentrations in the concentrates and the base polymer. Such an effect cannot be achieved by the addition of conventional surfactants.

It is known that, in order to increase the heat and light fastness, to increase the resistance of the polymers to flame, to increase the colorability of the products, to improve the feel and other properties of the polymer, and to make polymeric articles thereof, various stabilizers and modifiers are added. In order to simplify the processes, they can be added to the polymers together with the colorants according to the invention or added directly to the concentrates during their preparation. Example 1

A mixer of 4 79 kg of polypropylene powder having a molecular weight of 100,000, 15 kg of disazo-deinose live pigment PY-95 and 6 gmonostearate of glycerin was prepared on a high-speed mixer. The mixture was melted at 220 ° C, 180 ° C, 170 ° C, and 220 ° C zones, extruded into Tvarustrun, and cut into granules.

A phobic concentrate was prepared under the same conditions without addition of glycerine monostearate. The concentrates are evaluated for coloring yield and pigment distribution, respectively. concentrate in the polymer.

For the same purpose, polypropylene fibers were stained with both co-concentrates in a mass injection mold for 0.5% pigment concentration in the fiber.

The staining yield of the concentrate of the present invention measured by the remission spectrophotometer was up to 97% higher than that of the concentrate without the addition of monostearate glycerine. The pigment was dispersed in smaller particles in the polymer mass compared to the blank. Example 2

Bol! the prepared fibers in Example 1 but stained with a concentrate according to the invention containing 20 wt. Cu-phthalocyanine green pigment PG-36 (74625) and with 7 wt. ethylene glycol monooleate. The dyeing rate versus blind-cumulus was higher by 64 ° / o. Example 3

Spin concentrates were prepared and evaluated for fibers similar to those of Example 1, but contained 20 wt. and one of them is a technical mixture of mono-tristearate glycerin.

Coloring efficacy was achieved with the concentrate with the addition of a mixture of glycerine stearates 21% higher than without this addition. Example 4

Fibrous concentrates were prepared and evaluated as described herein. 1, but the concentrates contained 15 wt. disazo condensation red pigment PR-144. One concentrate contained an addition of 7% wt. polyethylene glycol monostearate. rel. mol. weight 300.

The staining yield of the concentrate with the addition of stearate was higher by 11% than the concentrate without such addition. Example 5

Fibrous concentrates were prepared and evaluated as described herein. 4, but one concentrate contained an addition of 7% w / w. glycerin dilaurate.

Claims (1)

Color concentrates with improved dispersion of polyolefin-based pigments for dyeing polyolefin fibers in hmiote, characterized in that they consist of poilyolefin in an amount of 99.4 to 60% by weight, pigments of the invention in an amount of 0.5 to 30% by weight. and 0.1 to 10 wt. esters of C8-C22 fatty acids and polyhydric alcohols with a free hydroxyl group.