CS258624B1 - Concentrated dispersion of organic pigments for polyolefins dyeing in substance - Google Patents

Abstract

Concentrated dispersions of organic pigments for coloring polyolefins in the mass containing polypropylene powder, organic pigment and at least one polar dispersant, containing o molecular weight ligomeric polyolefin 600 to 20,000 at total composition dispersion: powdered polypropylene 98 to 50 parts by weight organic pigment 1 to 25 parts by weight a polar dispersant 0.4 to 10 parts by weight oligomeric polyolefin 0.6 to 15 parts by weight

Description

238624

The invention relates to concentrated dispersions. organic pigments for coloring polyolefins.

In the dyeing of polyolefins in the mass, organic pigment concentrates are used with a suitable dispersant which, in particular, provides a high pigment dyeing capacity and good processing properties of the dyed melt. So far, several types of dispersing agents have been protected. They are for polyoxyethylene glycol based organic pigments, copolymers thereof, carboxylic acid esters of polyvalent alcohols, poloxyalkylene glycol ethers and mixtures of these substances AO19089, AO22095, AO22095, AO23599, AO248915. and AO 247 305, and for inorganic pigments such as T102 and carbon blacks of type molecular polyolefins AO 195 090.

In continuously expanding the palette of organic pigments for polyolefin dyeing, it has been shown that for most of them the prior art dispersing systems satisfy high color strength, but the dyed fibers and films of polyolefins often exhibit high abrasion and lower the brilliance of coloring.

These drawbacks eliminate concentrated dispersions of organic polyolefin coloring pigments in the composition of the invention, which comprise an additional component of oligomeric polyolefin having a molecular weight of 600 to 20,000 with a total polypropylene powder dispersion of 98 to 50 parts of mass. organic pigment 1 to 25 parts by weight polar dispersant 0.4 to 10 parts by weight of a oligomeric polyolefin 0.6 to 15 parts by weight;

The use of a low molecular weight polyolefin as a dispersing additive or component of a dispersing system improves in some cases the color yield of the pigments, but in particular reduces the abrasion of the fibers and the film increases the brilliance of the dyeing. This effect can be explained by the formation of a dispersion structure in the concentrate in which the dispersant is more perfectly distributed on the surface of the pigment particles, the dispersion structure of the concentrate being closer to the dispersion structure of the dyed material. The advantage of a suitable combination of more polar dispersants with a low molecular weight polyolefin is to increase the performance of the dyed polyolefins and reduce the cost of the dispersion system.

The invention is illustrated by the following examples. Example 1

A mixture of 79 kg of polypropylene powder having a molecular weight of 100,000, 15 kg of anthraquinone pigment yellow 145 and 6 kg of polypropylene oil having a molecular weight of 1,000 is mixed into a quick mixer and melted at 200 ° C on a two-strand kneading machine at granulate. In a similar manner, a standard color concentrate containing 79 kg of polypropylene powder, 15 kg of yel-low pigment and 6 kg of polyoxyethylene glycol 600 and 6,000 1: 1 is used, which is used as a dispersant in the manufacture of color concentrates. Thus, the concentrate prepared is a coloripipypypropylene fiber in a 0.6% by weight injection molding composition.

The color concentration of the concentrate as measured by the remission spectrophotometer was 30% higher than the standard sample, the abrasion was improved by 2 degrees according to the scale and the brilliance of the stain increased. Example 2

Polypropylene fibers prepared as in Example 1 using a concentrate containing 79 kg of polypropylene powder, 15 kilograms of diazocondensant pigment 95 and 6 kg of a polyoxyethylene glycol 600, polyoxyethylene glycol 6,000 and a poly-propylene oil 1.5: 1.5: 3 ratio Fibers stained with this concentrate showed improved abrasion by 1 degree gray scale and higher staining brilliance. EXAMPLE 3 The polypropylene fibers dyed in the mass of Example 1 were prepared with a concentrate containing 79 kg of polypropylene powder, 15 kg of an anthraquinone pigment red 147 and 6 kg of an e-ethylene oxide copolymer - =. propylene oxide having a molecular weight of 2,500 and polyethylene wax having a molecular weight of 6,000 in a ratio of 1: 1. The fibers exhibited a 20% higher color yield than the standard, an improved scaler of 1 degree gray scale, and a higher staining brilliance. Attaches

The concentrate was prepared by the procedure of Example 1 containing 79 kg of powdered polypropylene, 15 kg of red 144 BNa and 6 kg of a 1: 1 mixture of stearate mono and polypropylene oil with a weight ratio of 1: 1. 1 degree better wear value and higher staining brilliance. Example 5

The concentrate as in Example 1 was a colored polyethylene film. The color yield of the concentrate of the invention was 20

Claims (1)

5 258624 pens. higher than the standard concentrate. EXAMPLE 6 Polypropylene fiber was prepared by the procedure as in Example 1 of the colorant CONCENTRATED Concentrated dispersions of organic pigments for coloring polyolefins containing polypropylene powder, organic pigment and optionally at least one polar dispersant selected from the group consisting of polyoxyethylene glycol, polyoxypropylene. glycol, a copolymer of ethylene oxide and propylene oxide, esters of carboxylic acids and polyhydric alcohols and esters of polyoxyalkylene glycols with higher alcohols, characterized in that they contain as further component an o-ligomeric polyolefin with a molecular weight of 79 kg of powdered polypropylene, 15 kg of red 144 BNa 6 kg of a mixture of octyl ether ether with polyethylene glycol 600 and polypropylene oil with a molecular weight of 600 in 3: 7 ratio. The fibers exhibited improved abrasion of 1 degree gray scale and higher brilliance staining. BACKGROUND OF THE INVENTION 600 to 20,000 with a total composition of dispersion: polypropylene powder 98 to 50 parts by weight. organic pigment 1 to 25 parts by weight polar dispersant 0.4 to 10 parts by weight, oligomeric polyolefin 0.6 to 15 parts by weight;