Polyamide composition, stabilized with copper salt and an aromatic halide compound, a stabilizer and method for producing the composition

 

Describes a stabilized polyamide composition containing as a stabilizer at least one salt of copper and at least one halogenated organic compound with the copper content of 10-1000 hours /million, halogen 50-30000 h/m and the ratio of copper and halogen in a stabilized polyamide composition is from 1:1 to 1:3000, with halogenated organic compound selected from the group consisting of halogenated aromatic compounds, halogenated aliphatic phosphates and halogenated paraffins or mixtures thereof, provided that if the aromatic compound is commercially available brominated oligomer of styrene, polyamide is polyamide-4,6, and provided that the halogenated aromatic compound is not IDataReader connection. Also described is a method of obtaining the composition and the stabilizer used in the polyamide composition. The use of the proposed composition allows to avoid embrittlement of the material due to the selection of organic compounds and increases the maximum temperature for continuous operation. 3 S. and 8 C.p. f-crystals, 8 PL.

The present invention relates to stabil the comprehension, which leads to embrittlement of the material and mechanical destruction of the products thereof. As a consequence add certain chemical compounds that can with different efficiency of postponing the moment of embrittlement. These so-called antioxidants often created on the basis of phenol, amine or phosphate derivatives. Special options are used also in the case of polyamides. In this case, however, there is a particularly effective class of substances, which in the case of other polymers do not possess efficiency. This so-called dimensional stabilizers. Such stabilizing systems known for a long time and in large quantities are used for obtaining polyamides, such as polyamide fibers, made of tire cord, and molded products made of polyamide for technical applications, especially in engineering (PKW) and the electrotechnical industry (switches, printed circuit boards).

These copper stabilizers, as a rule, consist of two components. As the first component use copper compounds, such as, for example, a halide of copper or other salts of copper. To ensure that these compounds are effective as antioxidants, as the second componentace bromide of potassium. The molar ratio of copper:halogen and typically is 1:5-15. The recommended amount of additive is usually 30-200 hours/million of copper, that is, at the same time use 150-3000 hours /million halogen.

These traditional stabilizers give, in General, satisfactory results in the stabilization of polyamides. However, they have simultaneously some serious drawbacks.

During operation (during conditioning) polyamides absorb about 3% water. Due to this, when the temperature of the water-soluble component parts extracted from polyamide on the surface, which leads to the formation of plaque. If you use the halides of copper, potassium, or other soluble halides, they appear on the surface and form a hygroscopic coating, mostly acidic in nature. Due to this deteriorates the resistance to leakage currents; in the case of electrical components due to this may lead to failure. Upon contact with metals at these places is enhanced corrosion. Thus, only with difficulty can be met standards bus and the electrical industry.

At the same time, these stabilizers only with great difficulty can be introduced into the polyamide in Vomero was introduced into the melt of the polyamide. The problem here is the tendency to agglomeration of these substances. The feedstock so you need to fine grind and protect from reagglomeration. Directly to control the adding is possible only with difficulty. As a consequence, most often prepare preconcentrate (Royal mix), which is then added. Also such a heterogeneous mixture of solid particles in the melt is not as optimal as in the case, if the stabilizer was melted in the processing conditions and homogeneous compatible, as, for example, in the case of phenol, amine and other antioxidants.

Crystalline particles stabilizing salts have a negative impact on the physical properties of polyamides also when they are very vysokodispersnogo. This is based not only on the possible inhomogeneity in the dispersion, but also on the fact that small particles in the polyamide act as crystallization centers and thus cause increased crystallinity in polymers. This in part may lead to undesirable side effects. Thus, the impact strength may be reduced by 20-30% compared with the original value.

Traditional stabilizing system polyamides pool types due to the strong shift in the processing of additionally, you may receive the brown staining. Especially hinder occur during the production cycle fluctuations color that does not allow, or allows only limited use of the thus obtained compounds for unpainted or painted in different colors of products. Therefore, these types of polyamides are used mainly painted in black color.

Traditional stabilizers are often added to the aqueous solution during the polymerization, to thus optimize the dispersion. However, in this case the disadvantage is that there are deposits of metallic copper or copper oxide on the metal surfaces of the boiler and of the extruder with extrusion of the melt, which causes fluctuations in color and thus leads to the production stop. In the case of forming fibers, in addition, often there are deposits on filero that leads to breaks (fibers) and additional downtime.

Taking into account the above-mentioned difficulties in the prior art have been made various suggestions for improvement. Thus, the application for the European patent EP-A-390277 describes a stabilized composition based on polyamide-4,6. This special, very viscoplastic polyamide, it is possible to stabilize the point to be particularly suitable for use in the field of electrical engineering and electronics.

In applications for patents great Britain GB-A-1131933 and GB-A-1143826 described stable linear polyamides, which are stabilized using a mixture of soluble polyamide compounds of copper and special halogenated aliphatic organic compounds with up to 7 carbon atoms. These organic compounds, however, have relatively high volatility. This can lead to undesirable embrittlement of the material due to the selection of organic compounds.

Based on the above-mentioned problems and shortcomings of the prior art, the present invention is to obtain a stabilized polyamide composition, which no longer has these disadvantages while increasing the maximum temperature for continuous operation.

The problem is solved thanks to a stabilized polyamide composition, characterized in that the stabilizer contains at least one salt of copper and at least one halogenated organic compound and the halogenated organic compound vibiano from the group consisting of: (a) aromatic compounds, (b) aliphatic phosphates, and (c) paraffins or mixtures thereof, provided h is -4,6.

Unexpectedly shown that such stabilized polyamide compositions have improved properties at elevated maximum temperature for continuous operation.

Simultaneously, the present invention relates to a method for producing a stabilized polyamide composition, characterized in that mix with each other at least one polyamide, one salt of copper and at least one halogenated organic compound selected from the group consisting of: (a) aromatic compounds; (b) aliphatic phosphates, and (c) paraffins or mixtures thereof,
provided that, if the aromatic compound is a commercially available brominated oligomer of styrene, polyamide is polyamide-4,6.

In addition, the present invention relates to the use of at least one copper salt and at least one halogenated organic compounds, which are defined as indicated above for the stabilization of polyamides.

While preferred, respectively, the components (a) and/or (b).

At least one polyamide (PA), in accordance with the present invention, may be any polyamide. Polyamides are polymers with repeating AMI the emer lactam, or
(b) diamines and dicarboxylic acids or their functional derivatives.

By variations of the Monomeric structural units receive many different polyamides.

According to the invention is used as homopolyamide and also copolyamids. It is also possible to use block copolymers of polyamides with a simple polyester and other polymer-modified polyamides. The main representatives of polyamides are polyamide-6,6 (from a diamine and adipic acid) and polyamide-6 (-caprolactam). Other important polyamides are polyamide-11, polyamide-12, polyamide-610, RASM, MRR-1, PPD-T and aramids. You can also use a mixture of polyamide with other polymers. However, if necessary, the components of the stabilizer can adversely affect the components of the mixture. Therefore, they need to choose carefully.

Used according to the invention the copper salt can be any salt of copper.

Preferred salts odnoletnii or divalent copper inorganic or organic acids.

Examples of suitable copper salts are salts of copper(1), as CuJ, CuBr, CuCl or CuCN; salts of copper(II), as CuCl2, CuBr2, CuJ2, copper acetate, copper sulfate, stearate IU is shown salts.

Further, it is possible to use compounds such as acetylacetonate copper or copper ethylenediaminetetraacetate. It is also possible to use mixtures of different salts of copper. If necessary, moreover, you can also use copper powder. He reacts in the melt of the polyamide to form compounds of copper.

While the preferred halides of copper(I) and copper salt of organic acids. Particularly preferred iodide copper(1) and copper acetate.

The amount of copper used in the stabilized polyamide compositions is unlimited up until not deteriorate the mechanical properties of the polyamide. Usually it is 10-1000 hours/million of copper with respect to the whole composition. Preferably use 20-700 hours/million, particularly preferably 50-150 hours/million, and copper.

As used according to the invention halogenated organic compounds can be applied to any aromatic compound, and/or any aliphatic phosphate, and/or any paraffin. Preferred aromatic bromoacetamide compounds, brominated aliphatic phosphates and chlorinated or brominated paraffins. The molecular weight used according to the invention halogenated ALCO a little volatile, could simply and homogeneous blend with polyamide and had a slight tendency to migrate in the finished composition. Preferable brominated aromatic oligomeric epoxy resin, in particular on the basis of tetrabromobisphenol-A.

Examples used according to the invention paraffins are halogenated, particularly fluorinated, chlorinated or brominated, paraffins. You can use both soft and hard waxes. Preferred compounds such as chlorinated paraffin wax (for example, the average formula C20H24Cl18), Teflon waxes (for example, the average formula C20H22F20and vitani (copolymers of hexaferrite and vinylidenefluoride).

Examples of suitable compounds are:
Tris(tribromoneopentyl)phosphate (phosphate 1) derived dibromodichloromethane and chlorinated polyphosphonate and decabromobiphenyl, decabromodiphenyl ether, polydipsia, tetrabromobisphenol, chlorinated and brominated oligomers of styrene, derivatives of tetrabromobisphenol-as, for example, the website of altar servers 500C (EP-oligomer 1) and the website of altar servers 6000 (EP-oligomer 2), the structural formulas of which are given below, as well as chlorinated derivative deletedirectory. You can also use a mixture of halogenated organic compounds.

Add the amount of halogenated organic compounds is usually less than 10 wt.%. Usually add such quantity that they use 50-30000 hours /million halogen, with respect to the whole composition. Use preferably 100-10000 hours /million, particularly preferably 500-1500 hours/million, halogen.

Thus, in General, the ratio of copper and halogen in a stabilized polyamide compositions is from 1:1 to 1:3000, preferably in the range from 1:2 to 1:100, particularly preferably ranges from 1:5 to 1: 15 (respectively, a molar ratio).

Higher added amount, in General, not lead to any improvement in the action of the stabilizer; polyamides with amount more than 5 wt. % of halogenated organic compounds have clearly deteriorated stability. They are characterized by increased cleavage of polymer chains, which leads to premature embrittlement of the parts and a strong colour change. The content of halogenated organic compounds is preferably less than 3 wt.%, particularly preferably less than 1 wt.%.

The above-mentioned salts of copper, sootvetstviiami according to the invention the polyamide compositions are characterized by high temperature continuous operation, high resistance to leakage currents and lower propensity to change color. These advantages are proposed according to the invention stabilized polyamide compositions are based, presumably, on the synergistic action of halogenated organic compounds, which need only be added in very small quantities.

Resistance to leakage currents, which is defined as the CTI is very increased through the use of organic compounds. Due to this expands the scope of the proposed use according to the invention the polyamide compositions in the details, which are used in the field of electrical or electronic industry.

Polyamides for electrical parts must be CTI-values equal to 600, at least 550. This value is achieved in the case of pure polyamide. CTI is determined in accordance with DIN IEC 112.

Proposed according to the invention the polyamide composition compared with polyamides, equipped with traditional stabilizers copper/halide salt, also have the best breakdown strength. Used according to the invention organic compounds, compared with halide salts have Olufsen the time using salt and copper, as copper stearate, all the amount of the stabilizer is melted and yet very well dispersed in the polyamide.

Used according to the invention the components of the stabilizer have very good compatibility with all polyamides, i.e., do not form any deposits in the apparatus for processing plastics (dies, screws, form), as well as on the finished parts or fibers from synthetic materials.

Moreover, it is proposed according to the invention the polyamide compositions show only a very slight tendency to change color. In particular, in the case reinforced with fiberglass polyamide with traditional stabilizing systems based on copper discoloration is usually so strong that these compositions can be used only painted black. Therefore it is unexpected that in the case of proposed according to the invention the polyamide compositions of this does not occur or occurs only to a very insignificant degree. Thus, it is possible to obtain colored pigments polyamides without fluctuations color. Even painted using Tio2-pigments parts retain their dazzling whiteness. This opens up for colored poliamida so far been achieved only by using traditional stabilizing systems, which, however, on the basis of their properties in relation to discoloration cannot be applied.

Proposed according to the invention the polyamide composition, therefore, have the advantage that they exhibit improved long-term thermal stability and can be painted with pigments without undesirable color changes due to emerging of its own color.

For staining proposed according to the invention the polyamide compositions suitable for all usual pigments, such as titanium dioxide, white lead, zinc white, lithopone, antimony white, carbon black, black micaceous iron pigment, manganese black, cobalt black, antimony black, lead chrome pigment, lead oxide red, yellow zinc crowns, green zinc crowns, cadmium red, cobalt blue, Prussian blue, ultramarine, manganese violet, cadmium yellow, shveynfurth greens, molybdenum orange and red, orange, and red crowns, red micaceous iron pigment, green chromium oxide, strontium yellow, molybdenum blue, chalk, ochre, umber, green earth, burnt Terra di Siena and graphite.

Proposed according to the invention the polyamide compositions for a long time in acidic and alkaline conditions, relative to saline, glycol-water mixtures, and also to hot fats and oils, and organic solvents, that is, sharply reduced usually quickly emerging in these conditions, loss of mechanical strength (impact strength, tensile strength), as well as the tendency to embrittlement polyamides, and clearly improves suitability for long-term operation. Compared to other used for this purpose stabilizers, such as phenolic, amine, or traditional stabilizers copper/halide salt reach clearly superior actions.

Proposed according to the invention the polyamide composition can be freely combined with other additives, such as, for example, antiadhesive, plasticizers, crystallization accelerators, without compromising the desired effect stabilization. In some cases, stabilizing additives used against thermal decomposition and discoloration in the polyamides, i.e. with plasticizers, as BBS, or waxes, as Montanari, polyamides, in accordance with this show less yellowing. Proposed according to the invention the polyamide compositions which contain glass fiber, glass bead, the aging long-term exposure to heat compared to polyamide compositions stabilized with conventional stabilizers copper/halide salt.

Proposed according to the invention the polyamide composition further can be provided with conventional fillers or amplifiers. Examples of suitable fillers or amplifiers are glass fibre materials in the form of fibers, yarns, rovings, beads or powders, oxide materials, such as silicon dioxide, aluminum oxide or silicates and graphite or polymer fibers or filaments.

Due to the above advantages of the proposed according to the invention the polyamide compositions, they are particularly suitable for the production of fibers, as well as for the manufacture of parts for the electrical field or the field of electronics. It is mainly about connectors, platinum (carriers for electrical contacts) and hull details.

Further, for stabilized polyamide compositions according to the invention was evaluated the possibility of further improvements in the propensity to change color. In this surprisingly shown that further reduce the propensity to change of color can be achieved by supplementation of organic phosphites or inorganic phosphonates or NeoGeo these stabilizers often lead to the formation of copper oxides with copper salts, due to what appear gray or brown-black staining. Because it was very unexpected that the proposed according to the invention the combination of practically does not lead to any change in color and partially appearing due to proposed according to the invention the components of the stabilizer blue staining after conditioning is much less, if you add organic postit or inorganic phosphonate or inorganic hypophosphite. Appearing some slight residual staining can be easily Perekrestok and more is not a disadvantage for obtaining polyamides stable in color.

Further, it is shown that this Supplement can also slow down the yellowing of the polyamide during storage under the action of heat. This effect is particularly noticeable with the addition of organic phosphites.

Used according to the invention the organic phosphites are esters of phosphorous acid. Can be used as aliphatic and aromatic or mixed esters. Typical examples are, for example, dimethyl - and diethylphosphate, trimethyl - and triethylphosphite, also known as the additives used in the t (postit 20), bis(2,4-di-tert-butylphenyl)pentaerythrityl (postit 21), Tetra-KIS(2,4-di-tert-butylphenyl)-4,4'-biphenylenediisocyanate (postit 23), distearyldimethylammonium, diisooctylphthalate, distearoyl, crystalloid, triisooctyl, trilaurylamine, Christianity, Tris(dipropyleneglycol)FOSFA, diphenylphosphite, disneylandhotel, triphenylphosphite, Tris(p-nonylphenyl)FOSFA. Such compounds are available under the trade names irgafos, alkanox and Weston firms Ciba, Weston and The Great Lakes. In this particularly preferred postit 20, postit 21, postit 22 and postit 23.

Used according to the invention the inorganic phosphonates are salts of phosphonic acid. As soleobrazutaya using alkali metals, alkaline earth metals, and other common metals. Particularly preferred lithium, potassium, sodium, magnesium, calcium, strontium, barium and aluminum. Particularly preferred are sodium, potassium, magnesium and calcium. Particularly preferred phosphonate is gentrigication.

Used according to the invention inorganic hypophosphite are salt hypophosphoric acid. In relation used for the salt formation is the leader in used according to the invention of hypophosphite is the sodium salt hypophosphoric acid.

The added amount of the above-mentioned other additives ranges from 0.005 to 1.0% (50-10000 h /m), preferably in the region of 0.05-0.2% (500-2000 hours /million) and particularly preferably in the field of 0,075-0,15% (750-1500 hours /million). This number applies to the whole composition.

Used organic phosphites are preferably fused, stable during processing and resistant to extraction. This limit ensures the removal of phosphorous acid, which has a deleterious effect on the whole composition. The above organic phosphites, in particular, types 20, 21, 22 and 23, is particularly well suited to these conditions. Consequently, these compounds are particularly preferred.

Upon receipt stabilized according to the invention the polyamide compositions, moreover, it is shown that additive organic phosphite, inorganic phosphonate or inorganic hypophosphite preferably carried out only after the preparation of stabilized using components of the stabilizer composition. If you first prepare stabilized according to the invention the polyamide composition under item 1 of the claims, and only in the next stage of processing add organic postit, neorganicheskiye this effect when the above method is shown in the case of inorganic phosphonates. When this organic postit, inorganic phosphonate or inorganic hypophosphite can be entered as such in its pure form or in the form of a previously prepared mixture (masterbatches). Whereas this variant implementation recommend the following implementation, as in this case, use the same ratio.

Proposed according to the invention polyamide compositions have, in General, by mixing at least one polyamide, at least one compound of copper and at least one halogenated organic compound, which is defined in paragraph 1 of the claims.

The components can be directly mixed with each other in conventional mixing devices, that is, the polyamide and the components of the stabilizer is melted and mixed with each other. However, it is preferable to first melt the polyamide and then admixed components of the stabilizer. In particular, it is preferable to add the components of the stabilizer to the molten polyamide in the form of a previously prepared mixture (masterbatches). This particularly simplifies dosing stabilizing components.

Suitable mixing device Izv the global machine, continuously operating extruder and kneading machine, and static mixers. While it is preferable to use continuously operating extruder, both single screw and twin screw extruders that allow good mixing. Usually first extruder melt polyamide; stabilizing components can then be dosed through the respective inlets. These methods, as well as necessary for the implementation of the devices known to the specialist.

However, the stabilizing components can also be added already in obtaining polyamide, that is, to the mixture of monomers. This can be a very good mixing without additional mixing process that reduces production costs and time.

When receiving the polyamide compositions according to the invention using preconcentrate stabilizing components, this preconcentrate you can do in a periodically operating the mixers that allow you to achieve very good homogeneous distribution. An example of a preferred mixer is a Buss mixer. Usually, however, they use continuously working with material and typically use the same polyamide, which is then mixed with preconcentrator. However, you can also select other polyamide or other polymer. The concentration of the stabilizing component in preconcentrate set depending on compatibility with the matrix material, and the desired final concentration in the finished compound and good desirement. You can do preconcentrate up to a concentration of 50 wt.%, for example, CuJ and polydirectional (1:10).

Listed below are some preferred combinations of copper salts and halogenated organic compounds.

EP-Oligomers differ in particular for its excellent thermal stability. Moreover, their combination with copper compounds are very inexpensive.

Polydipsia and ER-oligomer 1 is also particularly suitable for the preparation of highly concentrated preconcentration, as they are very well compatible with polyamides. So, you can get preconcentrate containing up to 50 wt.% these compounds.

EP-Oligomer 2, on the contrary, you can type in the number only up to about 10 wt.%. Due to the reaction of the terminal epoxy groups with amino groups in the polyamide is a strong increase in melt viscosity. This chemical reaction is reamers explain the invention.

Experience in the following examples, the samples are prepared and have the following:
The sample preparation
The stabilizing mixture, as well as calcium stearate as antiadhesive pre-mixed with the polyamide granulate and when using the extruder melt, homogenize, continuously output in the form of a harness and granularit. The concentration of copper is 100 hours/million, halogen concentration is about 1000 hours/million (0.1%) and the concentration of calcium stearate is 0.3%. After drying, the granules in a machine for molding produce the corresponding normal samples in the form of bars to determine the impact strength (DIN 53453) and the Flexural (DIN 53452).

Aging under the influence of heat: DIN 53497, DIN 53446
Thermostats with circulating air above test samples in the form of bars stand and subjected to aging at a temperature of 130, 150 and 165oWith up until the measured value drops down to below 50% from the original values. Period of time to achieve this state is known as the half-decay time, and it is a measure of the resistance to aging under the influence of heat polyamide and yet also Mei become brittle (24 hours at a temperature of 150oC) use without stabilization in the case of many technical applications is impossible.

Resistance to leakage currents (CTI-values)
In a machine for injection molding of the above granules are made plates for test surface area 35 cm and a thickness of 3 mm, and test according to DIN-IEC-112.

Colorimetric
The change of color plates for testing assessed visually, additionally determine the intensity of the color by measuring the brightness values (DIN 6174; DIN 5033, part 1-7).

Example 1
Stabilization RA-6, test on aging under the action of heat at a temperature of 150oC, comparative tests with other copper stabilizer, additive 100 hours/million copper, 1000 hours/million halogen.

Measurement of impact strength until the fall to 50% of the values from the initial viscosity (measurement time half-life); determination of resistance to leakage currents (CTI-value), the color swietlicki condition and after conditioning; colorimetry (CIE Lab values; DIN 6174) (see diagram at the end of the description).

In the described polybractea both bromine atom are located in the aromatic ring in such a way that one atom of bromine is in paraprotein and other wachet polyamide 6 without components of the stabilizer and without other additives,
PDBS is Polideportivo described above,
DBDPE means decabromodiphenyl,
TWO means tetrabromo-bisphenol a,
RE Natur means polyamide 66 without components of the stabilizer and
without other additives,
RA GF30 means polyamide 66 with glass fibre, the number
fiberglass is 30 wt.%
acetate of copper: the valency of copper II
in table 2A phosphate is a phosphate of 1 mass % and %: all percentages are given in the calculation of the weight of the entire composition.

In the description of the invention in tables 2A, 3, 4 and 5 shows the compositions of compositions, and in parentheses are the components of the stabilizer, then the type of polyamide and further other additives in the case of their use.

These results clearly show that the stabilized according to the invention the polyamide compositions have dramatically improved resistance to leakage currents and, simultaneously, more long-term heat stability. Also discoloration in the case of the samples according to the invention does not render harmful influence on the colouring.

Next, were received and evaluated, as described above, the samples, which additionally contain another 1000 hours/million phosphite or phosphonate. Tests and measurements results are presented in table anitelea tests with other copper stabilizers, additive and measurement as in example 1.

Also in this case, the tests were carried out with additional postitem or pogonatum in quantities of 1000 hours/million

These tests clearly show that the samples according to the invention have better stability (half-time) and at the same time have such CTI-values that you can use these samples in the field of electronics.

Example 3
Stabilization of glass-fibre reinforced polyamide (percent fiberglass 30%), the test conditions as in example 2, add the amount of phosphite or phosphonate is 1000 hours/million half-Time refers to the Flexural.

As already indicated in the above examples, the samples according to the invention show SP-values that make possible application in the field of electronics.

Example 4
Stabilization of PA-66 Natur and PA 66 GF30 using si-stabilizers, 100 h/mn C; 1000 h/million halogen; 1000 hours/million phosphite or phosphonate.

Measurement of initial impact strength test impact strength of the specimen notched Izod in the case of RA-66 Natur and Charpy if RA-66 GF30.

Example 5
Resistance to extraction RA-6 and RA-66 GF30 in water and ethanol, the definition according to DIN 53738. Stabilization using 100 h/is rolito PA 66 GF 30 using various stabilizing systems, stabilization with 150 hours/million copper and 1500 hours/million halogen, 1000 hours/million phosphite or phosphonate.

Tests and comparative tests show that the proposed according to the invention the polyamide compositions have improved resistance to prolonged heating at elevated maximum thermal stability and at the same time improved resistance to leakage currents. Also the tendency to change of color is less than in the case of conventional polyamide compositions. Deterioration of the original toughness was achieved through the use of stabilizers in the form of salts (CuJ/KJ); replacing KJ joint soluble stabilizers (phosphate 1) the drop in viscosity is clearly less or non-existent. This shows a clear superiority of the samples according to the invention.


Claims

1. Stabilized polyamide composition, characterized in that the stabilizer contains at least one salt of copper and at least one halogenated organic compound with the copper content of 10-1000 ppm, the content of halogen 50-30000 ppm and the ratio of copper and halogen in a stabilized polyamide composition is from 1:1 to 1:3000, while halogenated organisasi aliphatic phosphates and halogenated paraffins or mixtures thereof, provided, what if the aromatic compound is commercially available brominated oligomer of styrene, polyamide is polyamide-4,6, and provided that the halogenated aromatic compound is not IDataReader connection.

2. Stabilized polyamide composition under item 1, characterized in that the copper salt selected from copper salts of organic or inorganic acids.

3. Stabilized polyamide composition under item 1 or 2, characterized in that the salt of the copper halide is copper (I).

4. Stabilized polyamide composition according to any one of paragraphs.1-3, characterized in that the aliphatic phosphate selected from Tris-(tribromoneopentyl)-phosphate, derivatives dibromodichloromethane and chlorinated polyphosphonates.

5. Stabilized polyamide composition according to any one of paragraphs.1-3, characterized in that the aromatic compound is selected from decabromodiphenyl, DECA brominated diphenyl ether, chlorinated, dimetindene(a,e)of cyclooctene, tetrabromobisphenol, chlorinated or brominated oligomers of styrene, derivatives of tetrabromobisphenol and polydirectional.

6. Stabilized polyamide composition according to any one of paragraphs.1-3, characterized in that the wax is chloroparaffin or Pompeo least one organic postit, inorganic phosphonate or inorganic hypophosphite.

8. Stabilizer for polyamides comprising at least one salt of copper and at least one halogenated organic compound, with halogenated organic compound selected from the group consisting of halogenated aromatic compounds, halogenated aliphatic phosphates and halogenated paraffins or mixtures thereof, provided that if the aromatic compound is commercially available brominated oligomer of styrene, polyamide is a polyamide 4,6.

9. A method of obtaining a stabilized polyamide composition, characterized in that mix with each other at least one polyamide, at least one salt of copper and at least one halogenated organic compound selected from the group consisting of (a) halogenated aromatic compounds;(b) halogenated aliphatic phosphate and (C) halogenated paraffins or mixtures thereof, provided that, if the aromatic compound is commercially available brominated oligomer of styrene, polyamide is polyamide-4,6, and provided that the halogenated aromatic compound is not IDataReader connection.

10. organic compound is administered in the form of a previously prepared mixture (masterbatches).

11. A method of obtaining a stabilized polyamide composition under item 9 or 10, characterized in that it received under item 9 or 10 of the mixture on to the next stage of processing add at least one organic postit, inorganic phosphonate or inorganic hypophosphite.

 

Same patents:

Polymer composition // 2203294

The invention relates to the production of compositions based on thermoplastic resins

The invention relates to materials, products and packaging of substances that are sensitive to oxygen, especially food
The invention relates to antifriction self-lubricating compositions based on polyethylene and can be used in various fields of mechanical engineering, instrument engineering, aircraft and shipbuilding, in particular for the manufacture of shell bearings, sliding guides and bearings operating without lubricant in the air

The invention relates to the composition of the copolymer-1, essentially free of copolymer-1 with a molecular mass of more than 40 kDa

The invention relates to new thermoplastic polymer composition suitable for extrusion processing-oriented product, in particular oriented blown film for sausage and sausage casings

The invention relates to polymer chemistry, in particular to the synthesis of adhesion promoters based on polyethylenepolyamine for polyvinyl chloride (PVC) plastisols and to the composition of the adhesion of the PVC plastisols used as adhesives for oil, fuel, air filters car, for sealing and protective coatings for metal surfaces

The invention relates to plastificated polymer compositions for the Shoe plastic

The invention relates to the composition of Dicyclopentadiene (DCPD) itself or in a mixture with at least one difficult cycloolefins and one catalyst from the group of phosphines of ruthenium and osmium; the method for conducting thermal metathetical polymerization of Dicyclopentadiene; covered with a layer of material; a linear or cross-linked to the copolymers of Dicyclopentadiene and at least one difficulty of cycloolefin

The invention relates to the production of a polymeric binder for composite materials used in engineering, aviation and other industries

Polymer composition // 2073039
The invention relates to polymeric compositions based on unplasticized polyvinyl chloride (PVC), which are processed by extrusion, for example, in molding products (Windows and doors) with high whiteness

The invention relates to the field of coating materials, including linoleum, intended for flooring in residential and public buildings

The invention relates to polymeric compositions for the preparation of fluorescent and selectively absorb radiation materials that can be used in agriculture for the manufacture of films, transforming the UV component of natural or artificial light emission of the red region of the spectrum

The invention relates to polymeric compositions for the preparation of fluorescent and selectively absorb radiation materials that can be used in agriculture for the manufacture of films, transforming the UV component of natural or artificial light emission of the red region of the spectrum

The invention relates to the production of self-extinguishing sealing compounds based on epoxy resins and can be used for impregnation of electrical goods, in particular for casting high-voltage devices, such as transformers, ignition coils
Up!