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Method of producing complex stabilisers for chlorine-containing polymers

Method of producing complex stabilisers for chlorine-containing polymers
IPC classes for russian patent Method of producing complex stabilisers for chlorine-containing polymers (RU 2400496):
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FIELD: chemistry.

SUBSTANCE: carboxylic acids are reacted with oxides and/or hydroxides of Zn and Ca metals in the presence of glycerin, ionol, epoxidated soya oil, epoxy resin, diphenylol propane, phosphite NF while heating, in which the complex stabiliser is obtained through reaction of carboxylic acids with oxides and/or hydroxides of Ca, Zn, Mg, Al in the presence of glycerin and additives selected from ionol, epoxidated soya oil, epoxy resin, diphenylol propane, phosphite NF, diphenyl-n-butylphosphite, PES-5 polyethylsiloxane liquid, Penta-1006 or Penta-1005 plastic modifier, calcium stearate while heating, in which the carboxylic acids used are oleic acid, 2-ethylhexane acid, α,α'-branched C10-C26 monocarboxylic acids. The carboxylic acids are first reacted with oxides and/or hydroxides of Zn, Ca, Mg, Al and glycerin at 140-180ºC to obtain a mixture consisting of salts of carboxylic acids and glycerin monoether of carboxylic acid, and an additive is added to the reaction mass only when acid number not greater than 5 mg KOH/g is reached. The process is carried out in the following ratio of components, wt %: carboxylic acids 6.3-60.4; oxides and/or hydroxides of metals 1.2-8.3; glycerin 8.5-20.4; additives - the rest.

EFFECT: simplification of the technological process of producing complex stabilisers of chorine-containing polymers, cutting on the number of technological operations, higher environmental safety of the process owing to prevention of formation of wastes and wider range of non-toxic complex stabilisers of chlorine-containing polymers.

2 cl, 27 ex, 3 tbl

 

The invention relates to organic chemistry and chemistry of polymers, in particular an improved method for obtaining complex stabilizers for chlorine-containing polymers may be used in the processing compositions of chlorine-containing polymers such as polyvinyl chloride, chlorinated polyvinyl chloride, copolymers of vinyl chloride etc. in various products (film materials, cable compounds, building materials, pipes and so on).

The main requirements to the above polymeric materials are sufficiently high thermal stability, high resistance to light aging, low initial yellowness products, good processability of the materials. It is known that for processing chlorine-containing polymers necessary stabilizers destruction. In the practice of stabilizing chlorine-containing polymers in the composition administered to five or more components, slowing decomposition and reporting PVC number of properties, in particular, for these purposes, use salts of carboxylic acids, epoxysilane, organic phosphites, antioxidants and other

The ideal stabilizer for PVC shall perform the following functions:

to connect eye-catching HCl to inhibit (inhibit) the oxidation reaction, stapling, to protect the double bond in the PVC chains, to absorb ultraviolet radiation. Realizalasa these functions can only be achieved through the use of complex stabilizers [K.S. K.S. Minsker, Fedoseeva G.T. Degradation and stabilization of PVC. M.: Chemistry, 1972, 424 S.].

A method of obtaining stabilizers of polyvinyl chloride interaction of stearic acid or synthetic fatty acids7-C21with metals or their oxides or hydroxides, or salts in the presence of plasticizer. According to this method can be obtained as individual metal salts of fatty acids and their mixtures [USSR Author's certificate No. 413854, CL. SS 53/24, publ. 1971]. However, are effective stabilizers consisting of a mixture of metal-containing stabilizers-salts of fatty monocarboxylic acids and additives: antioxidants, lubricants, light stabilizers and other

A method of obtaining complex stabilizers chlorine-containing polymers [USSR Author's certificate No. 2084472, CL. C08L 27/04, SC 13/02, publ. 1997], including the organic compound on the basis of a carboxylic acid and an additive, where the carboxylic acid is used arilsulfonilglitsinov acid, selected from a range that includes benzosulfimide acid, toluensulfonate acid, kilonardodicaprio acid, chlorobenzalmalononitrile acid, and as an additive, a mixture of calcium oxide and zinc stearate, or a mixture of lead oxide and calcium stearate. Advanced integrated with habilitator contains 4-8 parts by weight of maleic anhydride per 100 parts by weight of a Complex stabilizer is obtained by mixing the components first in the mixer at a temperature of 90-95°C for 25-30 min, then the composition ekstragiruyut on extrusomes at 160-165°C.

To obtain the integrated stabilizer are difficult, expensive carboxylic acid.

A method of obtaining complex stabilizer for chlorine-containing polymer interaction zinc oxide and calcium hydroxide in the presence of water first with a synthetic fatty acid (FFA) fraction of C17-C25at a temperature of 45-55°C for 90-120 min, drying the formed soosazhdennykh salt and mix them with pentaerythritol, diphenylolpropane or xilitla and teenliterotica [USSR Author's certificate No. 1809600, CL. SS 51/41, SC 5/11, 1996.]

The disadvantage of this method is the complexity, the complexity and the multi-stage process, the presence of a stage of drying the formed soosazhdennykh salts of fatty acids.

Closest to the claimed is a method of obtaining complex stabilizers for polyvinyl chloride by reacting a mixture of oxides and/or hydroxides Cd, Ba, Pb, Ca, Zn with carboxylic acid fraction With7-C20or their anhydrides at a temperature of 60-140°C in the presence of additives, intensifying the process of Salobre the Finance, such as glycerin, triethylene glycol, cyclohexanone, acetic acid, dioctylphthalate, acrylate, ether, triethylene glycol phthalic and methacrylic acids, diphenylolpropane, BHT or water, or epoxydecane soybean oil, epoxy resin, 2-ethylhexyladipate, Tris(nonylphenyl)pofit or chalk, wax, titanium dioxide, pigment paste. [USSR author's certificate No. 601276, SS 51/52, C08L 27/06, publ. 23.03.1978,]

The disadvantages of this method are: the use of a large number of activators salt formation, mainly various plasticizer is dioctylphthalate, ether, triethylene glycol and methacrylic acid, in which the synthesis conditions (heating, water availability) salts of carboxylic acids by the interaction of the acid with oxides and hydroxides are alkaline hydrolysis accompanied by the accumulation of acidic products, which certainly has a negative effect on thermal stability and initial color polymer products, the complexity of the technological process, the presence of multi-component download, interleaving multiple stages of heating and cooling, the use of compounds of toxic metals such as Cd, Ba, Pb, which are increasingly limit in the application for environmental reasons, to obtain a liquid stabilizer (example 5) using solvent is cyclohexanone, which is then distilled off by azeotrope with water, at the end of the synthesis of complex stabilizer emit from the precipitate by decantation, which together leads to the formation of waste products.

The purpose of the invention is to simplify the technological process of production of complex stabilizers, improving quality, expanding the range of complex non-toxic stabilizers chlorine-containing polymers.

The essence of the invention lies in the fact that the complex stabilizer is produced by the interaction of carboxylic acids with oxides and/or hydroxides of CA, Zn, Mg, and Al in the presence of glycerol and additives selected from BHT, epoxidizing soybean oil, epoxy resin, diphenylolpropane, phosphite NF, diphenyl-n-butylphosphate, polyethylsiloxane liquid brand PES-5, modifier plastics brand Penta-1006 or Penta-1005, calcium stearate, when heated, in which the carboxylic acids used oleic, 2-ethylhexanol, α,α'-branched monocarboxylic acid fractions With10-C26first carboxylic acid is subjected to interaction with oxides and/or hydroxides of Zn, CA, Mg, A1 and glycerin at a temperature of 140-180 ° C to obtain a mixture consisting of salts of carboxylic acids and monoether glycerin carboxylic acids, and acid number of the reaction mass does not exceed 5 m in the KOH/g in the reaction mass of injected additives, moreover, the process is carried out at the following ratio, wt.%:

Carboxylic acids 36,3-60,4
Oxide and/or hydroxide of metals 1,2-8,3
Glycerin 8,5-20,4
Supplements the rest of it.

As additives used epoxydecane soybean oil, epoxy resin grades: ED-20 ED-16 (GOST 10587-84), the epoxy resin chlorinated "Oxilan-6 (TU 6-02-1376-87), BHT, diphenylolpropane, tennispalatsi (postit NF), diphenyl-n-butylphosphate, calcium stearate, polyethylsiloxane liquid brand PES-5 according to GOST 13004-77, or modifiers plastic brands: Cat-1006, or Penta-1005 (TU 2257-204-40245042-2007).

Penta-1006, Penta-1005 is a composition based polyorganosiloxane.

PES-5 polyethylsiloxane liquid, a mixture of polymers predominantly linear structure, with a kinematic viscosity of from 200 to 500 cSt.

Epoxy resin brand ED-16 is an oligomeric product on the basis of epichlorohydrin and diphenylolpropane, with mass fractions of epoxy groups of 16-18%.

Epoxy resin brand ED-20 is the way the second oligomeric product on the basis of epichlorohydrin and diphenylolpropane, with a mass fraction of epoxy groups 20-22,5%.

Oxilan-6 is an oligomeric product of polymerization of epichlorohydrin in the presence of glycerol and subsequent dehydrochlorination the hydrate of sodium oxide obtained polyester.

For complete integrated stabilizer using α,α'-branched monocarboxylic acid fractions acids With10-C26on THE other 2431-200-00203312-2000.

Feature of the proposed method to obtain complex stabilizer is that pre-receive a mixture consisting of salts of carboxylic acids and monoether glycerin carboxylic acid, by reacting oleic or 2-ethylhexanol or VIC fraction10-C26with mixtures of oxides and/or hydroxides of CA, Zn, Mg, Al and glycerin at a temperature of 140-180°C. and acid number of the reaction mass is not more than 5 mg KOH/g enter the additives contributing to the stabilizing and improving the complex distribution of the stabilizer in the compositions of chlorinated polymers. Use in the compositions and complex stabilizers of these components in specific amounts, helps to improve the overall properties of the compositions of chlorine-containing polymers, namely to improve thermal and svetostoyjkostj, melt.

Suggested usage : the BA allows you to:

to simplify the process of obtaining complex stabilizers chlorine-containing polymers, which consists in reducing the number of technological operations;

- to improve the environmental safety of the process by eliminating waste;

to expand the range of non-toxic complex stabilizers chlorine-containing polymers.

The essence of the invention is illustrated by the following examples.

Example 1 (invention)

In a three-neck flask equipped with stirrer, thermometer, nozzle Dean-stark pipe for blowing nitrogen, placed in an oil bath, load 59.3 g of oleic acid, of 9.8 g of glycerin, 2.9 g of ZnO, 1.4 g of MgO. The process is conducted under stirring at a temperature of 160°C to reach an acid number of the reaction mass 2.4 mg KOH/g, then the reaction mass is then cooled to a temperature not higher than 100°C, added to 4.2 g of diphenylolpropane and 17.5 g of epoxy resin ED-16, 4.9 g of tennispalatsi. A lot intensively stirred. The finished product is unloaded. The product yield is 99%.

Examples according to the invention 2-26 syntheses carried out, analogously to example 1, using all the techniques and operations, in the same sequence. The components of the stabilizer, the synthesis conditions, are shown in table 1. Complex stabilizers in appearance is a homogeneous W is dcost light brown color.

To determine the effectiveness of integrated stabilizers prepare the polymer composition of the following composition, parts by weight: PVC - 100, integrated stabilizer - 5, are mixed in a laboratory mixer at a temperature of 80°C for 30 minutes, then get the film on a roll mill at 180°C for 5 minutes.

The stabilizing effect of the received complex stabilizers appreciate the time thermal stability of the polymer films according to GOST 14041-80 at 160°C, and fade resistance - time before the appearance of the paint film at 180°C, assessed visually. The melt flow index (MFR) determined according to GOST 11645-73 (Plastics. Method of determining the melt flow index of thermoplastic) on the device IIRT-1M.

The composition and test results are stable complex stabilizers chlorine-containing polymer compositions are presented in tables 2-3. For reference, here is the stabilizer obtained in example 4 prototype as more similar in composition to declared.

1. The method of obtaining complex stabilizers of polyvinyl chloride by reacting carboxylic acid with oxides and/or hydroxides of the metals Zn, Ca in the presence of glycerol, BHT, epoxidizing soybean oil, epoxy resin, diphenylolpropane, is Osvita NF when heated, characterized in that the complex stabilizer is produced by the interaction of carboxylic acids with oxides and/or hydroxides of Ca, Zn, Mg, and Al in the presence of glycerol and additives selected from BHT, epoxidizing soybean oil, epoxy resin, diphenylolpropane, phosphite NF, diphenyl-n-butylphosphate, polyethylsiloxane liquid brand PES-5, modifier plastics brand Penta-1006 or Penta-1005, calcium stearate, when heated, in which the carboxylic acids used oleic, 2-ethylhexanol, α,α'-branched monocarboxylic acid fraction10-C26first carboxylic acid is subjected to interaction with oxides and/or hydroxides of Zn, Ca, Mg, Al and glycerin at a temperature of 140-180°C to obtain a mixture consisting of salts of carboxylic acids and monoether glycerin carboxylic acids, and acid number of the reaction mass is not more than 5 mg KOH/g in the reaction mass of injected additives, and the process is carried out in the following ratio, wt.%:

Carboxylic acids 36,3-60,4
Oxide and/or hydroxide of metals 1,2-8,3
Glycerin 8,5-20,4
obuvki Rest

2. The method according to claim 1, characterized in that as the epoxy resin used epoxy resin grade ED-20 or ED-16 or epoxy resin chlorinated "Oxilan-6".

 

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