CS220957B1 - Colour concentrates with ammeliorated dispersion of pigments on the base of polyolefines - Google Patents

Abstract

Color concentrates with improved dispersion pigments based on polyiolefins, suitable for coloring polyolefin fibers polyolefin as a carrier in the mass in an amount of 99.4 to 60% by weight of the pigment in an amount of 0.5 to 30 wt. and 0.1 to 10% hm. esters of fatty acids having from 8 to 22 carbon in the chain and multivalent alcohols with a free hydroxyl group and eventually, the stabilizers or other fiber modifiers.

Description

The invention relates to color concentrates with improved dispersion of polyolefin-based pigments for coloring polyolefin fibers in the mass.

The essence of dyeing synthetic fibers in the mass is to disperse suitable pigmenites in the polymer. The degree of dispersion of the product, the molding or fiber, as well as the ductility of the pigment used and the processing of the dyed polymer into products depend on the degree of dispersion. The most demanding for the quality of the pigment dispersion in the polymer are fibers and foils. The degree of dispersion of the pigments depends on the quality of the pigments and the conditions of their dissipergy. A very important factor is the properties of the carrier, which can be influenced by various additives which are positive for the degree of pigment dispersion. In practice, the most commonly used polyethylene glycols, waxes, paraffins, oils and others are used.

We have found that a very effective agent for improving the pigment dispersion in a polymeric polymer and then the pigment concentrates in the base polymer are esters of the present invention with fatty acids esters of 8 to 22 carbon atoms and polyhydric fatty alcohols with free hydroxyl groups. all alcoholic ester groups are bound by an acid residue. The effect of the addition of a fatty acid ester and a higher alcohol is particularly evident at higher concentrations of pigments in the concentration or base polymer.

The color concentrates with improved dispersion of polyolefin-based pigments, in particular for the polyolefin fiber dye in the composition according to the invention, consist of 99.4 to 60% by weight. % polyolefin, 0.5 to 30 wt. and 0.1 to 10 wt. esters of C8-C22 fatty acids and mixed hydroxyl-free alcohols.

The activity of fatty acid esters of polyhydric alcohols is manifested, in particular, at higher concentrations of pigments in the concentrates and the base polymer. Such an effect cannot be achieved by the addition of conventional surfactants.

It is known that various stabilizers and modifiers are added to the polymers to increase the thermal and light stability, increase the flame resistance of the polymers, increase the dyeability of the articles, improve the feel and other properties of the polymer and the articles thereof. In order to simplify the production processes, these can be added to the polymers together with the color conjugates of the invention or added directly to the concentrates during their preparation.

Example 1

A blend was prepared using a mixture of kg of 100,000 molecular weight polypropylene powder, 15 kg of PY-95 disazo-condensation pigment and 6 g of glycerine monostostyrate. The mixture was melted at temperatures of 220 ° C, 180 ° C, 170 ° C and 220 ° C, extruded into strings and cut into granules.

Under the same conditions, a color concentrate was prepared without the addition of glycerin monostearate. Concentrates were evaluated for color dyeing and pigment distribution, respectively. of the concentrate in the polymer.

For this purpose, the polypropylene fibers in the mass were both dyed in the mass by injection to a concentration of 0.5% pigment in fiber.

The dyeing of the concentrate yields of the concentrate of the invention measured by remission spectrophotometer was up to 97% higher than that of the concentrate without the addition of glycerin monostearate. The pigment was dispersed in the polymer mass in smaller particles compared to the blank.

Example 2

The fibers in Example no. 1, but were colored with a 20% wt. Cu-phthalocyanine green pigment PG-36 (74625) and with the addition of 7 wt. ethylene glycol monooleate. The dyeing rate was 64% higher than the blank.

Example 3

Concentrates were prepared and evaluated after spinning into fibers similar to Example no. 1, but contained 20 wt. carbon black and one of them a technical blend of mono-di and glycerol tristearate.

The dyeing rate was obtained for the concentrate s. by adding a mixture of glycerin stearates 21% higher than without this addition.

Example 4

The fiber-spun concentrates according to Example 1 were prepared and evaluated. 1, but the concentrates contained 15 wt. disazocondensation red pigment PR-144. One concentrate contained 7 wt. polyethylene glycol monostearate o ^! rel. mol. weight 300.

The coloring capacity of the concentrate with the addition of stearate was 11% higher than that of the concentrate without such addition.

Example 5

Prepared and evaluated fiber concentrates according to the example were prepared

no. 4, but one concentrate contained 7% pot. 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.