Foamed polyesters and methods for production thereof

FIELD: chemistry.

SUBSTANCE: invention relates to a foamed article made from thermoplastic polyesters. Polyester foam for making the foamed article contains thermoplastic elastomers and has characteristic viscosity greater than 1.2 dl/g. The foamed article is made using an agent which contains thermoplastic elastomers and dianhydrides of tetracarboxylic acids. The foamed article is made from polyester having a premix of thermoplastic elastomers and dianhydrides of tetracarboxylic acids which is mixed and foamed to form a foamed article. The foamed article contains thermoplastic elastomers or thermoplastic elastomers based on copolyesters in amount of 0.5-15 wt % with respect to weight of the foamed article.

EFFECT: foamed article has high homogeneity, low open porosity and high breaking elongation under shearing stress.

12 cl, 2 tbl, 7 ex

 

The invention relates to foamed products obtained from thermoplastic polyesters with high homogeneity, low open pores and a high elongation at rupture under the influence of the shear stress, containing as a means of modifying dianhydride tetracosanoic acids, the means of obtaining foamed products and methods of producing foamed polyesters.

Known foamed cellular polyesters, and the way they are received, for example, from WO 93/12164. Described that thermoplastic polyesters which are suitable for extrusion foaming, have a characteristic viscosity of more than 0.8 DL/g To obtain the disclosed values of the characteristic viscosity describes the two-stage method, according to which the complex polyester with a characteristic viscosity more than the value of 0.52 DL/g add dianhydride organic tetracarbonyl acid and are forced to interact with obtaining a complicated polyester with a characteristic viscosity in the range from 0.85 to of 1.95 DL/g Then the foaming process can be initiated extrusion foaming with complex polyester obtained in this way. In some cases, during extrusion foaming can add additional dianhydride organic tetracarbonyl acid.

The disadvantage is manutoo method is that required two time-consuming stage of the method for the initial mixing of the entire volume of polyester with a dianhydride tetracarbonyl acid and then bring it to the temperature interactions in the reactor with the solid phase and save it at this temperature for several hours until the end of the interaction. Only after that should the actual foaming process.

According to US 5288764 foamed complex polyester can be obtained by formation of the molten mixture and extruding the mixture. The mixture is formed from the main fraction is a complex polyester and lower parts of a mixture of polyester with a substance, which causes the chain elongation or branching.

The invention is based on the task of creating pins, made of a composite of polyester, means to receive and how they receive to create a simple way of foams or foamed products made from thermoplastic polyesters with preferred properties. Especially popular foam, is made of a composite of polyester, have, for example, in addition to low density, high homogeneity, low open pore, high tensile strength and high elongation at rupture under the influence of the shear stress. Foaming polyesters in the foamed product is a process, which monoplast with difficulty. In particular, polyesters with a low characteristic viscosity (characteristic viscosity (IV) can either not lather or, if the foaming nevertheless may possibly lead to foams having unsatisfactory properties such as a high density, high indicator open pores and a low elongation under the influence of the shear stress.

The fact that the polyester foam foamed product contains at least one thermoplastic elastomer, leads to the solution according to the invention.

For example, foamed products, which are made of polyesters according to the invention, include thermoplastic elastomers in amounts from 0.5 to 15.0 wt%. in relation to the weight of the foamed product. Are suitable quantities of thermoplastic elastomers from 0.5 to 12 wt%. and preferably from 1.5 to 12 wt. -%, in each case relative to the weight of the foamed product.

Foam products that are made from the polyesters according to the present invention, as thermoplastic elastomer, mostly contain a mixture of polymers or thermoplastic elastomers based on complex sobolifera.

Thermoplastic elastomers consist of a polymer or mixture of polymers or contain them, which have the properties when temperaturepressure, which are similar to the properties of vulcanized rubber, but which can, however, process or receive at elevated temperatures as a thermoplastic material based on plastic. Mixtures of polymers have a polymer matrix made of solid thermoplastic particles containing soft stitched or unstitched elastomers. Thermoplastic elastomers based on complex sobolifera contain rigid thermoplastic sequence and a soft elastomeric sequence. Thermoplastic elastomers based on complex sobolifera contain polyester blocks, respectively, derived from a diol, preferably 1,4-butanediol or 1,2-ethanediol, and dicarboxylic acids, preferably terephthalic acid, which were tarifitsirovana simple polyesters, which have hydroxyl end groups in the condensation reaction.

Thermoplastic elastomers (for example, in accordance with the interim European standards ISO 18064) also known by the abbreviation TEP and subgroups under TPO (thermoplastic rubber vulcanizates), TPU (thermoplastic urethane elastomers), TPA (thermoplastic polyamide elastomers), TPS (thermoplastic sobolifera elastomers) and SMI (other not classified thermoplastic elastomers). The block polymers or segment-polymers, such as, e.g. the, thermoplastic styrene block polymers, thermoplastic complex sobolifera, esters of polyethers, thermoplastic polyurethane or block copolymers based on polyether and polyamide belonging to TPE. TPE receive their elastomeric properties, or by copolymerization of hard and soft blocks, or by mixing a thermoplastic matrix. In the case of graft-copolymerization of the hard segments form the so-called domains, which act as physical cross-linking points. TPE can be re-melted and recycled. TPE described as thermoplastic elastomers based on complex sobolifera, or also known as TPN, divided into TPS-HER soft segments with ties esters and ethers and TRS-EU/W-with soft segments polyesters or polyethers. In this document are of particular interest TPS-IT.

Thermoplastic elastomers based on complex sobolifera, or thermoplastic complex sobolifera, or thermoplastic esters of polyethers, or elastomeric esters simple sobolifera develop alternative of hard segments of polyester and soft segments of polyether. Depending on the type and length of the hard and soft segments can be adjusted wide range of hardness. Thermoplas the ranks complex Capoliveri are block copolymers, consisting on one side of the amorphous soft segments diols polyalkylene ethers and/or esters of aliphatic dicarboxylic acids with long chain and on the other side of the hard segments of crystalline polybutylene terephthalate. Elastomeric esters simple sobolifera get in the melt by interesterification reactions between complex terephthalate ether, polyalkylene glycol simple ether (for example, glycol simple polytetramethylene ether of polyethylene oxide glycol or glycol polypropyleneoxide) and diola short circuit, for example, 1,4-butanediol or 1,2-ethanediol.

To increase the molecular weight polyesters to complex ether can be added tool modification. Tool modification is, for example, dianhydride organic tetracarbonyl acid (dianhydride tetracarbonyl acid). The preferred dianhydride are dianhydride following tetracosanoic acid:

Benzene-1,2,4,5-tetracarbonyl acid (pyromellitate acid),

3,3',4,4'-biphenyltetracarboxylic acid,

3,3',4,4'-benzophenonetetracarboxylic acid,

2,2-bis-(3,4-dicarboxyphenoxy)-propane,

Simple bis-(3,4-dicarboxyphenoxy) ether

Simple bis-(3,4-dicarboxyphenoxy) thioether,

Naphthalene-2,3,6,7-tetracarbonyl acid,

Bis-3,4-dicarboxyphenoxy)-sulfon,

Tetrahydrofuran-2,3,4,5-tetracarbonyl acid,

2,2-bis-(3,4-dicarboxyphenoxy)-hexafluoropropan,

1,2,5,6-naphthalenemethanol acid,

Bis-(3,4-dicarboxyphenoxy)-sulfoxide

and mixtures thereof.

The preferred dianhydride is dianhydride pyromellitic acid (1,2:4,5-dianhydride benzene-1,2,4,5-tetracarbonyl acid).

Source materials that can be applied to obtain foamed polyesters are polyesters, such as thermoplastic polyesters, which can be obtained by polycondensation of aromatic dicarboxylic acids with dialami. Examples of aromatic acids are terephthalic and isophthalic acids, naphthalenesulphonate acid and dicarboxylic acid simple diphenyl ethers. Examples of diols include glycols such as ethylene glycol, tetraethylene glycol, cyclohexanedimethanol, 1,4-butanediol and 1,2-ethanediol. Preferred are polyesters derived from copolymers based on polybutylene terephthalate and polyethylene terephthalate containing up to 20% of units of isophthalic acid, or containing them.

A particularly important feature of the polyesters, which are used as source material, which modify according to the invention and foamed with the formation of foamed articles according to the invention, t is aetsa characteristic viscosity. Until now it was impossible to obtain a foam based on polyether with a characteristic viscosity equal to about 0.4 DL/g According to the present invention the foam with the desired properties can reliably be made from source materials, such as polyesters, with a characteristic viscosity values from about 0.4 DL/g and above, and, in particular, of polyesters with a characteristic viscosity, for example, from 0.6 to 0.7 DL/g and above. To increase low characteristic viscosities should, as appropriate, to increase the share of funds modifications, in particular dianhydride tetracarbonyl acid based on the complex of the polyester. Characteristic viscosity of processed complex polyester and, consequently, its ability to foaming can be easily controlled by selecting the concentration of the means of modifications in the premix and the number of used premix on the number of complex polyester. For example, the characteristic viscosity of from 0.6 to 0.7 DL/g can be increased by modification to over 1.0 or, alternatively, to 1.2 DL/g and even more.

The present invention also relates to means to obtain foamed products of polyesters with high homogeneity, low open pores and a high elongation at break under vozdeistvuyushchego voltage, containing as a means of modifying dianhydride tetracosanoic acids. The tool is a premix containing thermoplastic elastomers such as thermoplastic elastomers based on complex sobolifera, in quantities of from 25 to 95% of the mass. in relation to the weight means and dianhydride tetracosanoic acids in amounts from 5 to 30% of the mass. in relation to the weight of the tool.

The tool is preferable to obtain foamed articles made from polyesters, in which the tool is a premix containing thermoplastic elastomers based on complex spoliation in quantities of from 25 to 95% of the mass. and dianhydride tetracarbonyl acid in amounts from 5 to 30% of the mass. and from 0 to 70%, preferably 1-50 wt. -%, in each case relative to the weight of tools, stabilizers, nucleation agents, flame retardants and/or polyesters, it is advisable complex polyester of the same quality as the original complex polyester, which should be modified.

The tool, i.e. the premix, you can pre-make and in some cases immediately save. Premix and complex polyester, which should foam up, can then be mixed together in the prepared quantities. A mixture of premix and polyesters, you can optionally type in the foaming process and process in SPE the i.i.d. product.

The present invention also relates to a method for producing foamed articles made from polyesters with high homogeneity, low open pores and a high elongation at rupture under the influence of the shear stress, containing as a means of modifying dianhydride tetracosanoic acids.

According to the method of the invention obtain a foamed resin products based on polyesters has a premix of thermoplastic elastomers such as thermoplastic elastomers based on complex sobolifera, and added dianhydride tetracarbonyl acid and foams with the formation of foamed articles containing thermoplastic elastomers based on complex spoliation in quantities of from 0.5 to 15 wt%. in relation to the weight of the foamed product.

The premix of thermoplastic elastomers such as thermoplastic elastomers based on complex sobolifera, and dianhydrides tetracarbonyl acid get as the original product by mixing the components. The premix may contain 25-95% of the mass. in relation to the premix elastomers based on complex sobolifera and 5-30% of the mass. in relation to the premix dianhydride tetracarbonyl acid. A suitable premix contains 50 to 90 wt. -%, mostly 80-90% of the mass. in relation to the premix elastomers on the basis of the false sobolifera and 10-25 wt. -%, mostly 10-15% of the mass. in relation to the premix dianhydride tetracarbonyl acid.

The premix may, as additional components, for example, contain in General from 0 to 70%, preferably 0.1 to 70 wt%. and, in particular, 1-50 wt. -%, for example, polyesters, stabilizers, nucleation agents, fillers, flame retardants. Polyesters represented in relation to the additional components can be of the same quality as the polyesters, which should be modified, i.e. the source polyesters, for example, the characteristic viscosity of from about 0.4 DL/g and, in particular, polyesters, with a characteristic viscosity in the range from approximately 0.6 to 0.7 DL/g and above.

The premix can be introduced through the feed components in the mixing chamber, for example, a screw extruder, such as odnochastny or dvuhseriynyy extruder or Multiroll extruder, etc. and internal mixing of the components may occur over a time period of from 10 to 120 seconds at temperatures from 200 to 260°C. the Premix can be removed from the mixing chamber and bring to a more technological form, e.g. granules.

Obtain foamed products of polyesters occurs through a process of mixing and aeration. For this purpose, e.g. the measures get complicated polyester with a characteristic viscosity equal to at least 0.4 DL/g, and add the premix. The premix can be used in amounts of from 1.0 to 20.0% by mass. in relation to the complex polyester. Predominant are a number of from 2.0 to 4.0 wt%. in relation to the complex polyester.

In some cases, in addition to the complex of polyester and premix in the process of mixing and aeration to introduce additional components. Among them, the above-mentioned stabilizers, fillers and flame retardants, which can instead be entered if they are not already contained in the premix. Number of additional components are, for example, up to 15 wt. -%, it is advisable to 0.1-15% wt. in relation to the amount of a complex of the polyester and premix. Additional components, for example, to control the pore size and distribution of pores in the foam, you can also apply to the process of mixing and aeration. For example, they comprise up to 5 wt. -%, it is advisable to 0.1-5% wt. (relative to the amount of a complex of the polyester and premix) compounds of metals of the first to third groups of the periodic system, such as, for example, sodium carbonate, calcium carbonate, aluminum stearate or magnesium, monistat aluminum or magnesium or sodium terephthalate, and additional suitable compounds, such as, for example, talc or titanium dioxide.

Components can be submitted to react the R or the mixing chamber, for example, odnochastny or dvuhseriynyy extruder, or Multiroll extruder, or a cascade connection of two odnokomnatnyh extruders connected to one another, or dvuhseriynogo and adenocarcinoma extruder connected to one another. The residence time of the components in the reactor or mixing chamber may be, for example, from 8 to 40 minutes. The temperature during the residence time may range from 240 to 320°C.

Also in the reactor or mixing chamber, for example, mentioned extruders, can file a blowing agent. Suitable pore-formers, for example, are easily vaporized liquids, thermally degradable materials that emit gases or inert gases, and mixtures or combinations of these substances. In an easily evaporable liquid included saturated aliphatic or cycloaliphatic hydrocarbons, aromatic hydrocarbons and halogenated hydrocarbons. Examples are butane, pentane, hexane, cyclohexane, ethanol, acetone and HFC 152a. As the inert gas can be mentioned CO2and nitrogen. The pore-forming, usually served after the filing of the components in the extruder.

In forming the outlet of the extruder foamed product is produced continuously from the foam as possible essentially closed-cell foam, which may, for example, have KRU is white, rounded, rectangular or polygonal cross-section. Then foamed product can be moved according to the application, to mould, cutting and/or splicing. If you get foam products, foam products can be put next to each other and/or on top of each other and process with the formation of foam blocks, in particular homogeneous foam blocks with a total detachable part of the connection, such as General adhesion or, in particular, welding. Foamed products can be types of sheets and stacked. Surfaces that touch one another, it is possible to connect with each other throughout the area, for example by welding. In the foam blocks get with welded seams that lie in the direction of extrusion. From the foam block can be separated individual foam sheets, in particular, transversely to the direction of extrusion or transversely to the weld seams.

Foamed product according to the invention has in particular the following features:

- purity type; there are only polyesters, and without additional types of polymers

- regular closed pores.

Foamed products according to the invention with a bulk density of approximately 120 kg/m3have, in particular, the following primary features:

- shear under the influence of sdvigovogo the voltage according to ISO 1922, for example, more than 1.0 N/mm2,

- the shear modulus (G-module) according to ASTM S, for example, more than 20 N/mm2,

- elongation at rupture under the influence of the shear stress according to ISO 1922, for example, with values of more than 12%, it is more than 16% and preferably more than 50%,

- the limit of compressive strength according to ISO 844, for example, more than 1.7 N/mm2,

the compression module (E-module) according to DIN 53421, for example, more than 90 N/mm2,

- indicator open pores according to the method Airex AM-19 on the basis of ASTM D1056-07, for example, less than 8% and in particular less than 4%. Measurement indicator open pores according to the method Airex AM-19 were carried out as described in ASTM D1056, but is calculated by a different formula: ASTM D1059: W=[(A-B)/B]×100, where W=weight change [%]; A=final weight of sample In=the initial mass of the sample.

Airex AM-19:OZ=[(A-B)/(L×B×D)]×100, OZ=index open pores [vol.%]; A=weight of sample after conditioning [g];=mass of the sample before conditioning [g]; L, B, D=length, width, thickness of the sample [cm]; the density of water is 1 g/cm3, explicitly in the formula not shown. According to the present invention, for example, achieved values in the test water absorption equal to below 40 wt. -%, appropriate below 35% of the mass. and, in particular, below 30 wt. -%;

the viscosity index of the finished foam are determined according to ISO 1628/5, and it may, for example, be more than the eating of 150 ml/g, approximately in accordance with a characteristic viscosity, equal to more than 1.2 DL/g is Preferred viscosity index of the finished foam, specified according to ISO 1628/5 equal to, for example, more than 160 ml/g, for example, in accordance with a characteristic viscosity, equal to more than of 1.30 DL/g

The method according to the invention also differs, for example, that during the extrusion does not occur gel formation. The premix can be fully mixed with a complex polyester, and does not form undesirable second phase. The premix can be obtained on devices that are known in themselves, the so-called devices for processing, and the process easy to manage. You can also easily control the properties of the foamed products by selecting thermoplastic elastomers based on complex sobolifera (TPS) and soft elastomer contained therein, and a rigid thermoplastic sequences.

Examples

Premix; example 1:

Thermoplastic elastomer based on complex sobolifera (TPS) in the form of granules with a shore hardness 55D dried for 4 hours at 100°C by hot air. In dvuhserijnom extruder rotating in the same direction with the cylinder diameter of 27 mm and L/D ratio equal to 40, mixed 85% of the mass. TRS (TPS) and 15% of the mass. the dianhydride pyromellitic acid (PMDA) when t is mperature cylinder between 200 and 210°C and at a speed of 200 rpm in a protective gas atmosphere and discharged in the form of strands. Strand after cooling in a water bath and drying blowers make a disc knife into cylindrical pellets. The premix thus obtained is finally dried for 3 hours at 70°C.

Premix; example 2:

Thermoplastic elastomer based on complex sobolifera (TPS) in the form of granules with a shore hardness 33 D dried for 4 hours at 100°C by hot air. In dvuhserijnom extruder rotating in the same direction with the cylinder diameter of 27 mm and L/D ratio equal to 40, mixed 85% of the mass. TRS and 15% of the mass. the dianhydride pyromellitic acid (PMDA) when the temperature of the cylinder between 200 and 210° and at a speed of 200 rpm in a protective gas atmosphere and discharged in the form of strands. Strand after cooling in a water bath and drying blowers make a disc knife into cylindrical pellets. The premix thus obtained is finally dried for 3 hours at 70°C.

Premix; comparative example:

Polyester granules (PET) with a characteristic viscosity 0,81 DL/g dried by hot air at 150°C for 8 hours. On the same system as in example 1, mixed 85% of the mass. the PET chips and 15% of the mass. the dianhydride pyromellitic acid (PMDA) when the temperature of the cylinder between 240 and 250°C and at a speed of 200 rpm in a protective gas atmosphere you who ruhut in the form of strands. Strand after cooling in a water bath and drying blower in the granulator make a disc knife into cylindrical granules. The premix thus obtained is finally dried for 3 hours at 70°C.

Table 1
The test parameters to obtain a premix
PremixExample 1Example 2Comparative example
Composition
Fraction TPSmass %85,085,0
Faction PETmass %85,0
Fraction PMDAmass %15,015,015,0
The machine parameters
Temperature zone power°C200200250
The temperature of the mixing zone°C210210250
Temperature zones unload°C205205240
The temperature of the mass°C199204238
Pressure weightBar341212
The current in the armature winding of the extruder%523343
Performancekg/h202020
The speed of the extruderR/mi is 200200200
Speed challengem/min303030
Premix
Bulk density
g/DL65,459,776,5

Foam; example 1:

96.3% of the mass. the PET chips as the starting material with a characteristic viscosity 0,81 DL/g dried for about 5 hours at 170°C with dry air and together with 2.7% of the mass. premix from example 1 (dried for about 11 hours with dry air at 60°C) and 1.0% agent nucleation (30% talc in PET; dried for about 11 hours with dry air at 60°C), is loaded into the first extruder extrusion foaming system with two screw extruders, melted, mixed and foamed with CO2. The temperature of the melt at the exit of the extrusion device is 248°C, the performance of approximately 290 kg/h, the residence time in the extruder is approximately 17 minutes Continuously receive foamed products, for example, approximately cube-shaped cross-section, which R the state to the length of the foamed products of the type of sheet. Foamed products of the type of sheets is placed in a pile and welded to one another at the contact surfaces, and the obtained foam blocks. The measured values given in the examples is determined on foam sheets, which are separated from the foam blocks transversely to the direction of extrusion. The viscosity grade of the finished foam are determined according to ISO 1628/5, and he is 164,0 ml/g, which corresponds to the characteristic viscosity of 1.32 DL/g

Foam; example 2:

96.3% of the mass. the PET granulate with a characteristic viscosity 0,81 DL/g dried for about 5 hours at 170°C with dry air and together with 2.7% of the mass. premix from example 2 (dried for about 11 hours with dry air at 60°C) and 1.0% agent nucleation (30% talc in PET; dried for about 11 hours with dry air at 60°C), is loaded into the first extruder extrusion foaming system with two screw extruders, melted, mixed and foamed with CO2. The temperature of the melt at the exit of the extrusion device is 249°C, the performance of approximately 290 kg/h, the residence time in the extruder is approximately 17 minutes the viscosity grade of the finished foam are determined according to ISO 1628/5, and he is 165,6 ml/g, which corresponds to the characteristic viscosity of 1.33 DL/g

Foam; note the R 3:

86,7% of the mass. the PET granulate with a characteristic viscosity 0,81 DL/g dried for about 5 hours at 170°C with dry air and together with 2.3% of the mass. premix from example 2 (dried for about 11 hours with dry air at 60°C) and 1.0% agent nucleation (30% talc in PET; dried for about 11 hours with dry air at 60°C) and 10% of the mass. thermoplastic elastomer based on complex sobolifera (TPS) with a shore hardness 33 D (dried for about 12 hours with dry air at 100°C), is loaded into the first extruder extrusion foaming system with two screw extruders, melted, mixed and foamed with CO2. The temperature of the melt at the exit of the extrusion device is 248°C, the performance of approximately 270 kg/h, the residence time in the extruder is approximately 18 minutes the viscosity grade of the finished foam are determined according to ISO 1628/5, and he is 162,2 ml/g, which corresponds to the characteristic viscosity of 1.30 DL/g

Foam; comparative example:

96.3% of the mass. the PET granulate with a characteristic viscosity 0,81 DL/g dried for about 5 hours at 170°C with dry air and together with 2.7% of the mass. premix of the comparative example (dried for about 11 hours using dry is on air at 60°C) and 1.0% agent nucleation (30% talc in PET; dried for about 11 hours with dry air at 60°C), is loaded into the first extruder extrusion foaming system with two screw extruders, melted, mixed and foamed with CO2. The temperature of the melt at the exit of the extrusion device is 247°C. Performance should be reduced to 200 kg/h to implement the required values of open pores is equal to <8%. The residence time in the extruder, thus, increases to approximately 24 minutes the viscosity grade of the finished foam according to ISO 1628/5, despite a longer duration of stay, level 157,8 ml/g is lower than in examples 1 and 2, because, consequently, also correlated characteristic viscosity (of 1.27 DL/g).

The mechanical properties of the obtained foams are listed in table 2.

Table 2
The mechanical properties of the foams
FoamExample 1Example 2Example 3Comparative example
Bulk densitykg/m3 ISO 845121,3of 120.5122,2the level of 121.8

The compressive strength ofN/mm2ISO 8441,791,751,591,81
E-module-compression) verticalN/mm2DIN 53421102,497,297,6106,9
ShearN/mm2ISO 19221,111,081,321,07
G-module (shear modulus)N/mm2ASTM C23,622,419,823,8
Elongation at rupture under the influence of the shear stress% 16,015,873,38,0
Indicator open poresvol.%AM-0193,03,43,25,2
The test for water absorptionwt.%ASTM D105627,229,928,945,1

1. Foamed product obtained from thermoplastic polyesters with high homogeneity, low open pores and a high elongation at rupture under the influence of the shear stress, characterized in that the foam on the basis of complex polyester contains a thermoplastic elastomer and has a characteristic viscosity, equal to more than 1.2 DL/g

2. Foamed product obtained from the polyesters according to claim 1, characterized in that thermoplastic elastomer is contained in amounts of from 0.5 to 15 wt.% in relation to the weight of the foamed product.

3. Foamed product obtained from the polyesters according to one of claims 1 or 2, characterized in that as thermoplastic elastomers Polief the RNA foam contains thermoplastic elastomers based on complex sobolifera.

4. Foamed product obtained from the polyesters according to claim 3, characterized in that thermoplastic elastomers based on complex sobolifera are contained in amounts of from 0.5 to 15 wt.% in relation to the weight of the foamed product.

5. Foamed product obtained from the polyesters according to claim 3, characterized in that thermoplastic elastomers based on complex sobolifera contain polyester blocks and polyether blocks derived from a diol, preferably 1,4-butanediol or 1,2-ethanediol, and dicarboxylic acids, preferably terephthalic acid, which atrificial the polyesters, which have terminal hydroxyl groups in the condensation reaction.

6. Foamed product obtained from the polyesters according to claim 1, characterized in that the polyester foam has a metric open pores less than 8% and in particular less than 4%.

7. Foamed product obtained from the polyesters according to claim 1, characterized in that the polyester foam has a tensile elongation under the influence of the shear stress more than 12%, it is more than 16% and preferably more than 50%.

8. A method of obtaining a foamed product according to claim 1 of thermoplastic polyesters with high homogeneity, low open pores and a high elongation at rupture under the influence of the shear stress containing as a means of modifying dianhydride tetracosanoic acids, characterized in that the complex polyester has premix thermoplastic elastomer, preferably a thermoplastic elastomer based on complex sobolifera, and dianhydrides tetracosanoic acids added to them, which are mixed and foamed with the formation of foamed articles containing thermoplastic elastomers or thermoplastic elastomers based on complex sobolifera, in quantities of from 0.5 to 15 wt.% in relation to the weight of the foamed product.

9. The way to obtain foamed products from thermoplastic polyesters according to claim 8, characterized in that the complex polyester with premix of thermoplastic elastomers based on complex sobolifera and dianhydrides tetracosanoic acid serves as a component in the reactor or mixing chamber, in particular odnochastny or dvuhseriynyy extruder, or Multiroll extruder, or a cascade connection of two odnokomnatnyh extruders connected to one another, or dvuhseriynogo and adenocarcinoma extruder, and mixed in there.

10. Means for obtaining a foamed products of polyesters with high homogeneity, low open pores and a high elongation at rupture under the influence of the shear stress, containing as a means of modifying dianhydride tetracosanoic acids, characterized those who, that tool is a premix containing thermoplastic elastomer, preferably a thermoplastic elastomer based on complex sobolifera, in quantities of from 25 to 95 wt.% in relation to the weight means, and dianhydride tetracosanoic acids in amounts from 5 to 30 wt.% in relation to the weight means, and where thermoplastic elastomer based on complex spoliation has a shore hardness between 33D and 55D.

11. Means for obtaining a foamed products of polyesters of claim 10, wherein the tool is a premix containing thermoplastic elastomers based on complex spoliation in quantities from 50 to 90 wt.%, suitable from 80 to 90 wt.%, and dianhydride tetracosanoic acids in quantities from 10 to 25 wt.%, suitable from 10 to 15 wt.%, in relation to the weight of the tool.

12. Means for obtaining a foamed products of polyesters according to one of p or 11, characterized in that the tool is a premix containing 0-70%, preferably 1-50 wt.%, in each case relative to the weight of tools, stabilizers, nucleation agents, flame retardants, and/or a complex of the polyester, it is advisable complex polyester of the same quality as the original complex polyester that you want to modify.



 

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18 cl, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a current-conducting adhesive composition for use in microwave electronics. The current-conducting adhesive composition contains binder based on modified epoxy resin, a diluent, a hardener and metallic filler in form of nanodispersed silver powder. The modified epoxy resin is epoxy-novolak resin. The diluent is diglycidyl ether of the family of laprols. The hardener is a product of reaction between aminophenol and unsaturated organic acids. The composition additionally contains a mixture of a finishing agent and spreading agent in ratio of 1:1, which is a mixture of organophenoxy siloxane and organophenoxy silane, and a solvent selected from polyglycol ethers.

EFFECT: current-conducting adhesive composition has high heat- and electroconductivity, heat resistance and manufacturability, low viscosity, while preserving high cohesion strength and high mechanical strength of the adhesive joint.

2 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: compositions are meant for strong joints between detecting elements while providing current-conducting contact when assembling components of communications electronics equipment and integrated circuits, especially flexible integrated microcircuits. The current-conducting adhesive composition contains epoxy resin, a hardener and silver powder. The epoxy resin used is a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol or a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol and diglycidyl ether of an epichlorohydrin homopolymer. The hardener used is a mixture of an amine-type hardener and oligoaminoamide. The silver powder used is silver flake powder and an additional organic solvent.

EFFECT: adhesive composition has low volume resistivity, which provides high structural strength of adhesive joints between aluminium alloys after hardening, high processibility of the obtained adhesive composition which provides quality joints between miniature elements.

6 tbl

FIELD: polymers.

SUBSTANCE: invention relates to technology for semiconductive instrument making, namely to methods and compositions for technology in making semiconductive devices and integral schemes, in particular, to technology for creature of gluing conducting compositions. Invention proposes a material consisting of from organic substances only and wherein at least one substance represents a polymer in the parent material and/or in material after its hardening in the gluing process or formation of gluing layer and comprising at least one active component providing the anisotropic conductivity, and at least one special additive taken in the effective amount. As active component providing anisotropic conductivity the proposed material comprises dielectric component possessing the high polarizability and/or the bistable electronic energetic structure with respect to the process of uptake of an excessive electron owing to the presence of phthalide, sulfophthalide, phthalimidine, o-ketocarboxyl groups, derivatives of o-ketocarboxyl groups and/or labile triarylmethane group. Invention provides creature of polymeric anisotropic conducting composition gluing material with enhanced safety for reproducibility of positive indices, high conductivity and high anisotropy of conductivity in direction perpendicular to the gluing plane.

EFFECT: improved and valuable properties of material.

36 cl, 1 tbl, 32 ex

FIELD: preparation of nickel filler for production of current-conducting composition on base of epoxy diane resin ЭД-20 for shielding and contacting of metal surfaces.

SUBSTANCE: proposed method includes drying of nickel powder ПНК-1Л5 which is immersed in alcohol-nephrase mixture before drying at alcohol-to-nephrase ratio of 1:1 and is mixed for 5-10 minutes at temperature of 25±10°C ; drying is first performed at temperature of 25±10°C continued for an hour and then at temperature of 100±10°C continued for 3-5 hours; then, mixture is cooled down to temperature of 25±10°C.

EFFECT: reduction of specific volume resistance of current-conducting adhesive composition.

FIELD: gluing compositions and materials.

SUBSTANCE: invention relates to a gluing current-conducting composition designated for fixing articles and providing electric hermeticity in wave-guide systems of electronic engineering technique. The composition comprises components taken in the following ratio, mas. p. p: epoxydiane resin ED-20, 90-110; low-molecular polyamide resin L-20, 55-65; nickel powder of sort PNK-1L5, 500-600; technical cyclohexanone as a solvent, 80-120; titanium-organosilicon oligomer of cross-shaped structure of the general formula: Ti{[OSi(CH3)(C6H5)]2-5OH}4 representing product of TMPhT (tetrakis (methylphenylsiloxanehydroxy) titanium). Invention provides enhancing heat stability, increasing electric hermiticity of wave-guides and decreasing coefficient of stationary wave in wave-guide devices.

EFFECT: improved and valuable properties of composition.

2 tbl, 3 ex

FIELD: adhesives.

SUBSTANCE: invention discloses glue compositions, in particular heatproof, easy-to handle, solvent-free conducting glue for low-resistance contact mounting of device structure elements. Glue is particularly suitable in manufacture of semiconductor devices, microwave microcircuits, hydride microwave devices, etc. Glue is based on epoxide resin, namely interaction product of epoxy-titanium-organosilicon resin and tetrabutoxy titanate at ratio 1:0.06. Hardening agent utilized is dimethylamino-substituted 4,4'-diphenylmathanodiisocyanate, metallic filler is fine silver, and diluent is phenol/epichlorohydrin reaction product.

EFFECT: improved performance characteristics.

3 ex

The invention relates to a conductive adhesive compositions based on epoxy resins and metal filler, designed for mounting photoelectronic products

The invention relates to thermally conductive adhesives

FIELD: physics.

SUBSTANCE: photopolymerisable composition contains a polymerisable component, e.g., a monomer or mixture of monomers, ortho-quinones and a reducing agent, e.g., an amine, with the following ratio of components, pts.wt: polymerisable component 100, ortho-quinones 0.005-0.1, reducing agent 0.5-10.0, for connecting light guides. The invention also relates to a method and a device for connecting light guides using said composition.

EFFECT: use of the present invention simplifies, speeds up and reduces the cost of connecting light guides, and enables to achieve higher quality.

11 cl, 1 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: electroconductive adhesive contains epoxy resin modified with an organosilicon compound in furyl glycidyl ether as binder, polyaminoamide as a hardener, nickel carbonyl powder modified with an amine as filler.

EFFECT: invention increases adhesion strength of electroconductive adhesive during shearing owing to fewer defects in the adhesive joint, use of nickel carbonyl powder modified with an amine ensures uniform distribution of particles in the volume.

1 tbl

FIELD: chemistry.

SUBSTANCE: composition contains an anaerobic sealant AN-111 and filler materials. The filler materials are microtalck Talkon T-20 and bronze powder BPP.

EFFECT: use of the composition increases strength and cuts hardening time of glued joints.

3 tbl, 3 dwg

FIELD: chemistry.

SUBSTANCE: adhesive contains anaerobic sealant AH-112 in amount of 87-88 wt %, aluminium powder in amount of 11-12 wt % and bronze powder in amount of 0.3-0.4 wt %.

EFFECT: use of said components in the adhesive lowers the price of the adhesive, improves deformation-strength properties of the adhesive joint and increases durability of the adhesive joint.

2 tbl, 3 dwg

FIELD: electricity.

SUBSTANCE: adhesive tape includes adhesive polymeric resin on acryl basis and conductive fillers. Adhesive polymeric resin includes polymer obtained by copolymerisation of alkyl acrylate monomer having C1-C14 alkyl group with polar copolymerised monomer. Conductive filler is chosen from the group consisting of precious metals, base metals, precious or base metals with coating from precious metals, precious and base metals with coating from base metals, non-metals with coating from precious and base metals, conductive non-metals, conductive polymers, and their mixtures. Conductive fillers are oriented in adhesive tape both on longitudinal and in transverse directions. Electrically conducting adhesive tape is obtained by mixing monomers for preparation of adhesive polymeric resin with conductive fillers. Mixture in the form of sheet is formed. Both surfaces of the sheet are illuminated with light in order to perform photochemical polymerisation of adhesive polymeric resin. Each surface of the sheet is illuminated with light of various intensity. Light is emitted selectively to some part of the sheet of surface. Adhesive tape has flexibility and more effective electric conductivity.

EFFECT: adhesive tape can be used in electronic components, as adhesive tape screening electromagnetic waves, which provides the possibility of easy attachment and detachment.

18 cl, 3 tbl, 6 ex

FIELD: medicine.

SUBSTANCE: claimed is application of: (a) solvating system which contains surface active substance, able to separate, remove or destruct in any other way, at least, part of biofilm, attached or adhered to a part of middle or internal ear, to the surface in nasal cavity or in sinus cavity, or to mouth or gullet tissue, and (b) polymer film-forming medical hermetic, able to form protective layer above the place, on which such biofilm was destroyed, and which possesses adhesion to natural tissues in the processed place and is resistant to separation or other destruction until natural decomposition or resorption of hermetic takes place, for manufacturing therapeutic system for treatment of infectious diseases of ear or throat, corresponding method of treatment and composition of said hermetic and anti-microbial preparation, which includes gallium-containing compound for application in the method. Demonstrated is 5.2-fold logarithmic reduction of the level of microbial contamination in vitro by cultures Staphylococcus aureus, Pseudomonas aeruginosa.

EFFECT: invention suggests efficiency of treatment by the claimed method of chronic otitis media with evaporation (COME), recurrent acute otitis media (RAOM), cholesteatoma, chronic rhinosinusitis.

71 cl, 4 dwg, 2 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a current-conducting adhesive composition for use in microwave electronics. The current-conducting adhesive composition contains binder based on modified epoxy resin, a diluent, a hardener and metallic filler in form of nanodispersed silver powder. The modified epoxy resin is epoxy-novolak resin. The diluent is diglycidyl ether of the family of laprols. The hardener is a product of reaction between aminophenol and unsaturated organic acids. The composition additionally contains a mixture of a finishing agent and spreading agent in ratio of 1:1, which is a mixture of organophenoxy siloxane and organophenoxy silane, and a solvent selected from polyglycol ethers.

EFFECT: current-conducting adhesive composition has high heat- and electroconductivity, heat resistance and manufacturability, low viscosity, while preserving high cohesion strength and high mechanical strength of the adhesive joint.

2 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a current-conducting adhesive composition for use in microwave electronics. The current-conducting adhesive composition contains binder based on modified epoxy resin, a diluent, a hardener and metallic filler in form of nanodispersed silver powder. The modified epoxy resin is epoxy-novolak resin. The diluent is diglycidyl ether of the family of laprols. The hardener is a product of reaction between aminophenol and unsaturated organic acids. The composition additionally contains a mixture of a finishing agent and spreading agent in ratio of 1:1, which is a mixture of organophenoxy siloxane and organophenoxy silane, and a solvent selected from polyglycol ethers.

EFFECT: current-conducting adhesive composition has high heat- and electroconductivity, heat resistance and manufacturability, low viscosity, while preserving high cohesion strength and high mechanical strength of the adhesive joint.

2 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: compositions are meant for strong joints between detecting elements while providing current-conducting contact when assembling components of communications electronics equipment and integrated circuits, especially flexible integrated microcircuits. The current-conducting adhesive composition contains epoxy resin, a hardener and silver powder. The epoxy resin used is a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol or a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol and diglycidyl ether of an epichlorohydrin homopolymer. The hardener used is a mixture of an amine-type hardener and oligoaminoamide. The silver powder used is silver flake powder and an additional organic solvent.

EFFECT: adhesive composition has low volume resistivity, which provides high structural strength of adhesive joints between aluminium alloys after hardening, high processibility of the obtained adhesive composition which provides quality joints between miniature elements.

6 tbl

FIELD: chemistry.

SUBSTANCE: compositions are meant for strong joints between detecting elements while providing current-conducting contact when assembling components of communications electronics equipment and integrated circuits, especially flexible integrated microcircuits. The current-conducting adhesive composition contains epoxy resin, a hardener and silver powder. The epoxy resin used is a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol or a mixture of epoxy diane resin with diglycidyl ether of 1,4 butanediol and diglycidyl ether of an epichlorohydrin homopolymer. The hardener used is a mixture of an amine-type hardener and oligoaminoamide. The silver powder used is silver flake powder and an additional organic solvent.

EFFECT: adhesive composition has low volume resistivity, which provides high structural strength of adhesive joints between aluminium alloys after hardening, high processibility of the obtained adhesive composition which provides quality joints between miniature elements.

6 tbl

FIELD: chemistry.

SUBSTANCE: method of producing nanocomposites involves coating nanoparticles with mean particle size from 1 nm to 100 nm with dicarboxylic acid; mixing nanoparticles coated with dicarboxylic acid with a cross-linking agent to obtain a starting mixture; mixing the starting mixture with polyester to form a polyester-based nanocomposite.

EFFECT: low crystallisation temperature and high glass-transition temperature of the nanocomposite compared to polyester.

14 cl, 7 dwg, 2 ex

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