CS267361B1

CS267361B1 - A method of increasing the thermostability of monoazopigment lacquers for the preparation of color dispersions

Info

Publication number: CS267361B1
Application number: CS88396A
Authority: CS
Inventors: Koloman Ing Csc Ondrejmiska; Jozef Samuhel; Norbert Ing Szentivanyi; Lubomir Ing Strapko; Peter Ing Franko; Frantisek Ing Mihaly; Milan Ing Macurak; Dusan Ing Vrba; Anton Ing Csc Marcincin
Original assignee: Ondrejmiska Koloman; Jozef Samuhel; Szentivanyi Norbert; Strapko Lubomir; Franko Peter; Mihaly Frantisek; Macurak Milan; Vrba Dusan; Marcincin Anton
Priority date: 1988-01-21
Filing date: 1988-01-21
Publication date: 1990-02-12
Also published as: CS39688A1

Abstract

Laky monoazopigmentov patria do kategorie lacných pigmentov, obvykle však citlivých na vyššie teploty pri zapracovávaní do hmoty. Ich uplatnenie pre farbenie náročnějších výrobkov až do teplót 250 °C sa dosiahne prídavkom zinočnatých a horečnatých solí, najma vo formě solí mastných kyselin, ktoré ufahčujú ich dispergáciu v polymére.Monoazo pigment varnishes belong to the category of cheap pigments, but are usually sensitive to higher temperatures when incorporated into the mass. Their application for coloring more demanding products up to temperatures of 250 °C is achieved by the addition of zinc and magnesium salts, especially in the form of fatty acid salts, which facilitate their dispersion in the polymer.

Description

Vynález sa týká spósobu zvýšenia termostability lakov monoazopigmentov a z nich vyrábaných disperzií, najmá pre farbenie polymérov v hmotě.The invention relates to a method for increasing the thermostability of monoazopigment lacquers and dispersions produced therefrom, in particular for the dyeing of polymers in mass.

Pie farbenie polymérov v hmotě podfa čs. ΛΟ 245 095 a čs. ΛΟ 245 098 sa používajú pigmenty farbív vo vhodných nosičoch. Požiadavkou je vysoká tepelná stálosť farebných pigmentov, nakofko tieto sa pridávajú do taveniny polyméru, ktorej teplota přesahuje až 300 °C v priebehu homogenizácie a ďaišieho spracovania na rózne tvarované výrobky, najmá syntetické vlákna. Organické pigmenty s dobrou dispergovatefnosťou a tepelnou stálosťou sú vefmi nákladné a predražujú výrobu farebných výrobkov.Pie dyeing of polymers in mass according to MS. 09 245 095 and MS. No. 245,098 dye pigments are used in suitable carriers. The requirement is a high thermal stability of the color pigments, since these are added to the polymer melt, the temperature of which exceeds 300 ° C during homogenization and further processing into molded articles, particularly synthetic fibers. Organic pigments with good dispersibility and thermal stability are very expensive and make the manufacture of colored products more expensive.

Laky monoazopigmentov s obsahom stroncia dávajú vysoko brilantně vyfarbenie a ich použitie do náročnějších výrobkov ako sú vlákna, sa javí ekonomicky vefmi výhodné. Najváčšou zábranou pre toto použitie je ich značná citlivost’ voči teplotám, prejavujúca sa změnou farebného odtieňa. Vo váčšine prípadov ide o teploty vyššie ako 220 °C, pri ktorých sa polyrnéry spracovávajú. Pretože proces farbenia prebieha na hranici použitefnosti týchto lakov, dochádza v dósledku ich degradácie ku změnám alebo kolísaniu farebného odtieňa. Čiastočne sa tento úkaz zmierni použitím vhodného dispergačného systému, ktorý pozostáva derivátov polyalkylénglykolov, ako napr. polypropylénglykolov, zvlášť za přídavku stabilizátorov na báze organických fosfitov.Strontium-containing monoazopigment lacquers give highly brilliant dyeing and their use in more demanding products such as fibers appears to be economically advantageous. The biggest barrier to this use is their high sensitivity to temperatures, resulting in a change in color. In most cases the temperatures are higher than 220 ° C at which the polymers are processed. Since the dyeing process takes place at the limit of applicability of these paints, the color shade or changes due to their degradation. In part, this phenomenon is attenuated by the use of a suitable dispersing system consisting of derivatives of polyalkylene glycols such as polypropylene glycols, in particular with the addition of organic phosphite-based stabilizers.

Uvedené nedostatky bránili použiť ekonomicky výhodné laky monoazopigmentov pri farbení polymérov, najmá pre výrobu vlákien v hmotě.The aforementioned drawbacks prevented the use of economically advantageous monoazopment paints in the dyeing of polymers, especially for the production of fibers in the mass.

Zistili sme, že tento nedostatok lakov monoazopigmentov sa dá úspěšně zredukovať a hranicu použitefnosti týchto posunúť o 20 až 30 °C smerom k vyšším teplotám, čo sa urobí podfa tohoto vynálezu tak, že pri zapracovávaní lakov monoazopigmentov do polyméru sa pridajú soli zinku alebo horčíka, hlavně vo iorme s dobrou afinitou k farbenému polyméru, ako je napr. sof mastných kyselin v množstve 0,1 ažWe have found that this lack of monoazopigment lacquers can be successfully reduced and the usability limit of these monoazopigments reduced by 20 to 30 ° C towards higher temperatures, which is done according to the present invention by adding zinc or magnesium salts to the monoazopigment lacquers. mainly in the moderate affinity for the dyed polymer, such as the fatty acid salt of 0.1 to

Claims

SUBJECT A method of increasing the thermostability of monoazopigment lacquers and the color dispersions prepared therefrom, characterized in that 0.1 to 10% by weight of 10% by weight is added when the pigment is incorporated into the polymer. per weight of pigment. EXAMPLE 1 A mixture of isotactic polypropylene powder with rel. mole. weight 120,000, 20 wt. of P.R. monoazopigment powder. 48: 3.8 wt. % polypropylene glycol, 0.2 wt. of a stabilizer, 2,4-di-tert-butyl-phenyl distearylpentaerythritol diphosphite and 1 wt. stearate Zn. The mixture is then melted, kneaded under vacuum on a kneader-extruder at temperatures in individual zones 200, 100, 150, 200 ° C and extruded into string-shaped water which is cut into granules and dried. In a similar manner, a color concentrate is prepared with the same amount of polypropylene oxide dispersant and 2,6-di-tert-butyl-4-methylphenol stabilizer with the same amount of Ca stearate as zinc stearate in the previous case. Fibers dyed in mass were injected with a pigment content of 1% using one once, one second concentrate at different temperatures, namely 225, 235, 245 and 255 ° C. In both visual and spectrophotometric evaluation, the fibers were stained with a concentrate containing zinc stearate more brilliantly and 10% more potent than with calcium stearate. There was also a shift in the shade change due to pigment degradation from 235 to 255 ° C. Example

2 In a similar manner to Example 1, concentrates were prepared wherein the propylene oxide / ethylene oxide copolymer and the same amount of magnesium stearate were used as the dispersant. With magnesium stearate, the fibers were slightly more brilliant compared to fibers without the addition of Zn or Mg, and the boundary of color change due to thermal degradation was shifted by 10 ° C. THE INVENTION zinc or magnesium salts, preferably in the form of fatty acid salts, to the amount of varnish used.