CS274047B1 - Method of colour and colour loaded polyolefin fibres and other polymer products preparation - Google Patents

Abstract

The solution concerns a method of preparation of colour and colour filled polyolefin fibres and other polymer products. The principle of the solution consists in the fact that the colour high-molecular modifier is prepared by mutual melting of polymer modifier, colour component and a basic polymer, while the modifier used is terpolymer of acrylonitrile - butadiene - styrene, with flow index from 1 to 20 g/10 min and the colour component used is dispersion or reactive colouring agent. The fibre prepared according to the above mentioned solution shows by 20 to 30 percent better colour fastness.

Description

The invention relates to a process for preparing colored and filled colored polyolefin fibers and other polymer products.

Currently, dyeing of polyolefin fibers and other polymer products is done in two ways:

1. Dyeing in the polymer mass using colored pigments.

2. Diffuse-surface dyeing with various types of dyes (dye solutions or dispersions in water).

The first method utilizes the solid incorporation of pigments directly in the polyolefins, the second requires the addition of modifiers (low or high molecular weight) that are capable of binding the dye in the dyeing process.

Both pigments and modifiers must have sufficient thermal stability at the processing temperatures of the polymer, compatibility with the polymer, diffusion stability of the product, non-toxicity and others.

The modifiers used for binding e.g. Acidic, metal-complex and reactive dyes are substances of basic type containing nitrogen atoms in the chain (primary, secondary amino or tertiary nitrogen) or other basic groups such as:

copolymer of ethylene and (2-diethylamino) ethyl methacrylate (Europ. pat. 039207), copolymer of ethylene and (2-diethylamino) ethyl acrylate (Jap. pat. 5218/1971), copolymer of ethylene with vinylpyridine or N-vinylcarbazole, or acrylamide (Jap. 19173/1967), copolymers of ethylene with various acrylate or methacrylate comonomers (NSR pat. 2260993), polyamides containing piperazine and derivatives thereof (ger offen 2B32218, Jap. pat. 41777/1973, Jap. pat. 84953/1973, No. 234,251), or containing imino groups (Jap. Pat. No. 42733/1972), modified polyamides (U.S. Pat. No. 170927), basic nitrogenous polycondensates (U.S. Pat. No. 3,475,518), modified ethylene-maleic anhydride copolymer polyamine (Fr. pat. 2 123 904), a copolymer of ethylene with a dialkylaminoacrylate in admixture with an alkali metal salt of a carboxylic acid and an amide compound of a higher fatty acid (Jap. pat. 18448/1986).

For binding of disperse dyes, it is possible (as modifiers for surface dyeing) to use substances which themselves dye with disperse dyes e.g. polyesters, or ethylene-vinyl acetate copolymer (CS A 0 262 637).

The combined method of using both the first and second dyeing methods consists in using a pre-dyed (polymeric) modifier to prepare colored polyolefin fibers and other polyolefin products from a polymeric substance of a basic nature and a color component - acidic, metal-complex or reactive. dyes (US Pat. 234 969, 266 128), or a polymeric substance (dispersing or reactive dye binding) of a color component - dispersive or reactive dye (CS A0 270 106).

However, the prior art techniques for preparing colored or colored filled polyolefin fibers do not guarantee sufficient color fastness of the finished product.

This disadvantage is overcome by the process according to the invention, characterized in that the colored high molecular weight modifier is prepared by melting together the polymeric modifier, the color component and the base polymer using acrylonitrile-butadiene-styrene terpolymer with a flow index of 1 to 20 g / min. and a colorant dispersive or reactive colorant. The mixture is further processed according to the usual procedure.

In a concentration range of 0.02 to 1 wt. dyes in the final product give a wide variety of color saturation - from very light to deep hues. Effective dispersion

CS 274 047 B1 of a colored high molecular weight modifier (high dye concentration) in the polymer system provides uniform coloring of the article.

The color modifier can also be prepared by mixing the granulator modifier with the colorant and melting the mixture in a kneading apparatus; extrusion yields a string that is cooled, chopped, or the powder modifier is mixed with the dye, melted and the granulate is prepared as before, or the paste modifier is mixed with the dye and used as a color paste or modifier, polymer and the color is mixed, remelted and a granular modifier concentrate is prepared.

A color high molecular weight modifier may be prepared with the addition of a dispersant and other adjunct ingredients, such as e.g. filler and the like, or these other additives, respectively. the fillers are added together with the color modifier in an amount according to the desired color shade to the granulated polymer, and the mixture is processed by extrusion technique to various color polymer products, respectively. fibers. By using higher processing temperatures, the thermal stability of the color modifier can be influenced, which is advantageous in the preparation of color porous products and fibers.

The price of the modifier used is only slightly higher than the price of e.g. Polypropylene, the cost of the (dispersive, reactive) dyes used is substantially lower than that of the color pigments, so that the economic advantage of the dyeing method is clear. The range of reactive and disperse dyes is wide enough so that a wide variety of shades can be prepared. Although the high molecular weight modifier can affect the partially supramolecular structure, its macromolecular nature ensures that the properties of the stained and / or dyestuffs, respectively. dyed with colored pigments and, moreover, the color fastness of the fiber prepared according to the invention is improved by approximately 20 to 25% compared to the prior art.

Example 1

The acrylonitrile-butadiene-styrene terpolymer (ABS copolymer) and the disperse dye. The string melt is cooled with cold air or water and cut into a colored granular modifier. The dried color modifier is mixed with commercial polyolefin in such a ratio that the extruded product (spinning, molding, injection molding, etc.) of the product (such as fiber, tape, foil, oven) with the usual mechanical properties contains 0.05 ¾ wt. dye. The color fastness of the product thus prepared is 30% better than the ethylene vinyl acetate copolymer modifier used hitherto.

Example 2

ABS copolymer and disperse dye Ostacet blue P3R is melted at temperatures of 1B5 to 220 ° C in an extruder in such a proportion that the dye content of the color modifier is 10% by weight. and a concentrated color modifier in the form of a granulate is prepared from the melt (after cooling with a stream of cold air). The modifier thus prepared and dried is added to the commercial polypropylene in an amount such that the colored fibers contain 0.1% by weight. dye.

Example 3

A color modifier of ABS copolymer and disperse dye Ostacet red P2G (dye content of 10% by weight) was prepared as in Example 2 and blended with polypropylene such that the colored fibers contained 1% by weight. dye.

CS 274 047 Bl

Example 4

The color modifier made of ABS copolymer and reactive dye The H3B ostazin red prepared as in Example 2 is mixed with commercial polypropylene such that the colored fibers contain 0.5 wt. dye.

Example 5

The color modifier comprises an ABS copolymer, a disperse dye. The Oacetate Brilliant Red E-LB and the polypropylene prepared as in Example 2 are mixed with commercial polypropylene such that the final dye concentration in the color fiber is 0.5% by weight.

Example 6 kg of a blend composed of 40.167 kg of polyethylene LITEN BB-29 and polyethylene regranulate (from secondary raw materials) in a weight ratio of 5: B and 0.033 kg of a color modifier composed of B5 wt. % ABS copolymer and 15 wt. dispersion dye The ostracite brilliant red ELB is melted at temperatures of 185-220 ° C and a 1.3 mm thick red warning foil and a color shade and properties comparable to a red warning foil prepared using a red colored pigment-based concentrate is prepared.

Claims (1)

A process for preparing colored and colored filled polyolefin fibers and other polymeric products by adding a colored high molecular weight modifier to the base polymer and then treating the mixture, characterized in that the colored high molecular weight modifier is prepared by melting the polymeric modifier, color constituent and base polymer together. acrylonitrile - butadiene - styrene with a flow index of 1 to 20 g / 10 min and a colorant dispersive or reactive colorant.