DE2064066A1 - Increasing polyolefin dyeability - useful in fibre prodn - Google Patents

Abstract

Compsn. contains (co)polyolefins and N-contg. condensation prodts. wherein the latter are formed from 2,2,4- and/or 2,4,4-trimethyl-hexamethylene diamine and (cyclo)aliphatic or aromatic 6-12C diacids and/or amino acids and/or their lactams. Process is simple and prodts. have good stability.

Description

Dyeability of Polyolefins The invention relates to a method for the production of moldings, foils, tapes, fibers and the like that are easy to dye made of polyolefins. In particular, fibers made from olefin polymers can pass through Color dyes of all kinds well.

Polyolefin fibers, especially polypropylene fibers, have for certain Areas of application superior properties. Because of the c-chemical indifference of the polyolefins, however, it is practically impossible to produce molded parts from such To paint the material in sufficient quality.

Many attempts have been made to modify olefin polymers To achieve improvement in this direction.

These attempts generally aimed at 'D, by introduction polar groups in polyolefins, chemical points of attack for the dye molecules to accomplish.

According to DAS 1 150 519 it is proposed to use polymers from unsaturated Hydrocarbons by adding colloidal silica for basic dyes to make dyeable. If fibers are made from such modified material, so there is no significant decrease in mechanical properties compared to modified material to be observed.

According to French patent 1 343 686, the addition of Chromium or aluminum stearates to polyethylene or polypropylene the Improve dyeability. Such modified material shows during fiber production only unsatisfactory results. Fibers with a relatively low titre are especially prone to this for gluing, as the additives sweat out of the base material.

The lightfastness of fibers finished in this way is also only low. To get better results, add high concentrations of antioxidants and light stabilizers are required.

For the addition of basic organic compounds for improvement There are various other proposals for the dyeability of olefin polymers. The main problems when using molding compositions treated in this way are in part limited compatibility of the added compounds and insufficient thermal stability. The addition of basic organic compounds also often causes degradation of the polyolefin observed. Have proven to be technically feasible on this basis so far only a few procedures have been shown.

For example, in French patent specification 1,358,743 for improvement the dyeability of polyolefin fibers proposed, fibers made from polyolefins up to 25% of a polycondensation product from amines and epichlorohydrin, polylrinyl arridine or to mix in a polyethyleneimine. The fibers should then first treated with an aqueous polyvinyl alcohol solution and then with an aldehyde solution will. This treatment should take place at a higher temperature and for up to three hours take advantage of.

This modification is technically complex and complex.

In addition, higher concentrations of these basic compounds take place a drop in the mechanical properties of such modified polypropylene fibers.

It is difficult to obtain polypropylene fibers with good mechanical properties Properties can be dyed in sufficient quality.

Polypropylene has now been investigated in a technically simple manner to be modified in such a way that such material becomes easy to color and of high quality Fibers can be spun.

It was surprisingly found that molded parts, in particular Textile fibers and foils with an excellent affinity for various dyes Classes are obtained when blends of olefin polymers and linear polycondensation products spun or spun from special organic dicarboxylic acids and special diamines be extruded.

The invention therefore relates to a method for production of moldings for moldings made from olefin homopolymers or copolymers that can easily be colored and nitrogen-containing condensation products, characterized in that olefin polymers with condensation products of 2,2,4-trimethylhexamethylenediamine and / or 2,4,4-trimethylhexamethylenediamine and aliphatic, aromatic or cycloaliphatic dicarboxylic acids with 6-12 C atoms and / or amino acids or their lactams are mixed.

The polycondensation products used according to the invention are by condensation of 2,2,4-trimethylhexamethylenediamine and / or 2,4,4-trimethylhexamethylenediamine with carboxylic acids and lactams such as succinic acid, adipic acid, azelaic acid, sebacic acid, Decanedicarboxylic acid, terephthalic acid, isophthalic acid, - iexahydroterephthalic acid, Caprolactam, Aminow.dekansäure and Laurinlactam obtained.

The 2,2,4- and / or 2,4,4-trimethylhexamethylenediamine can advantageously be used also with 3-aminomethyl-3,5,5-trimethylcyclohexylamine or other Diamines are combined.

The molecular weights of the polycondensates can range between 300 and 30,000 lie. Depending on the molar ratio of the individual components, basic or acidic polyamides can be obtained. The polyamides are mixed with the polyolefin powder mixed. There is also the possibility of the Ethaslol solution of such Apply polyamides to the polyolefin powder and place the product in a vacuum drying cabinet too dry.

The polyamides are used in amounts of 0.5 to 25 wt., Preferably added to the olefin polymer in amounts of 0.5 to 10% by weight.

Olefin polymers include, in particular, homopolymers or copolymers of ethylene is to be understood as propylene or butene.

Such modified material can be conventional stabilizers, UV absorbers, Lubricants, antistatic agents, processing aids, pigments and the like are added will.

The mixtures according to the invention can be used for the production of films, Ribbons etc. are used. The mixtures are used to produce textile fibers granulated and then spun in a melt spinning layer. Modified like that Surprisingly, polyolefins show excellent thermal stability. So Modified polypropylene can even be used on extruders at temperatures of 270 ° C or spinning plants can be processed without a strong molecular breakdown or an undesirable discoloration of the material occurs.

Example 1 95 parts of isotactic polypropylene powder with an i4FI / 5/190 ° C of 30 g / 10 min and 5 parts of a basic condensation product of adipic acid and 2,2,4-trimethylhexamethylene diamine with a molecular weight of about 1,000 were mixed in a Papenmeyer mixer. The mixture was at a melt temperature of 230 ° C granulated on an extruder.

The granules were taken on a laboratory melt spinning machine spun under the following conditions: Spinneret: 4-fold, 0.2 mm mass temperature im Spinning head: 250 ° C. Winding speed: 600 m / min. The fibers showed good dyeability with the following dyes: Lanasyn Yellow 2RL Brillantali ziarinwalk blue FRL Nylosan red F-RL Artisil blue BGL Chrome fast red 3BL Cibalan brown red RL Supracene blue SES The fibers incurred evenly and showed a uniformly colored cross-section. the Color fastness was good.

Example 2 The fibers were produced and dyed as in Example 1 given. Condensation products with molecular weights (1,000 were used as 20% ethanol solution applied to the polypropylene.

The ethanol was then drawn off in a vacuum drying cabinet.

The following table shows some examples with which polypropylene fibers that can be easily dyed can be obtained: % Polypropylene% condensation- condensation- molar weight of the condensation- color fastness of the other- product product made from station product dyed material 97.5 2.5 caprolactam + 300 good 2,2,4-trimethyl hexamethylene diamine 95 5 decanedicarbon- 1 000 good acid + 2.2.4- Trimethylhexa- methylenediamine 95 5 adipic acid + 30,000 good Caprolactam + 2,2,4-trimethyl hexamethylenedia- min + 3-amino- methyl-3,5,5- Trimethylcyclo- hexylamine

Claims (6)

P a t e n t a n s p r ü c h e: 1. Process for the production of Molds for easily dyed molded parts made from olefin homo- or copolymers and nitrogen-containing condensation products, characterized in that olefin homopolymers with condensation products of 2,2,4-trimethylhexamethylenediamine and / or 2,4,4-trimethylhexamethylenediamine and aliphatic, aromatic or cycloaliphatic dicarboxylic acids with 6-12 C atoms and / or amino acids or their lactams are mixed. 2. The method according to claim 1, characterized in that the dicarboxylic acid Succinic acid, azelaic acid, adipic acid, sebacic acid or decanedicarboxylic acid can be used. 3. The method according to claim 1, characterized in that the dicarboxylic acid Terephthalic acid, isophthalic acid or hexahydroterephthalic acid can be used. 4. The method according to claim 1, characterized in that as amino acids or lactams, caprolactam, aminoundecanoic acid or laurolactam can be used. 5. The method according to claims 1 to 4, characterized gekennzeichnat, that the olefin polymers contain 0.5 to 25% by weight of nitrogen-containing condensation products, based on the total weight of the mixture. 6. The method according to claims 1 to 5, characterized in that that the condensation products have molecular weights between 300 and 30,000.