Silanol-crosslinkable composition for cable insulation
SUBSTANCE: invention relates to crosslinkable compositions based on polyolefins and copolymers thereof and modifiers for producing silanol-crosslinkable polymer compositions which can be used to produce film coatings, insulation and sheaths for cables and conductors for different purposes. The silanol-crosslinkable composition contains polyolefin, vinyl alkoxysilane, organic peroxide and a sheet silicate which is modified with resorcinol resin with ratio of the resorcinol resin to the sheet silicate of 6:10 pts.wt.
EFFECT: improved operational characteristics, shorter crosslinking time and longer property retention time.
6 cl, 2 tbl
The invention relates to the manufacture of polymeric products, namely slivaushiesia compositions based on polyolefins and their copolymers and modifiers to get cyanoliseus polymer compositions that can be used for film coating, such as insulation and sheath of cables and wires for various purposes.
The invention relates to polyolefin halogen containing compositions, slivaushiesia using organosilane in the presence of the initiator is an organic peroxide.
To improve the operational characteristics of the polymer compositions, for example, increased thermal stability, increased elastic modulus, modify them by means of various additives.
The analysis carried out in recent years, domestic and foreign studies indicate a high potential of research in the field of polymer nanocomposite materials constituting the polymers filled with nanoparticles that interact with the polymer matrix is not at the macro and at the molecular level. Due to this interaction produces a composite having a high adhesive strength of the polymer matrix of the nanoparticles.
Of most interest are polymer composites based on modified layered silicates, which are widely RA is widespread possible to extend and well-known as various species of clays. Preference among these is given bentonitowa rocks clays, which include not less than 70% of the mineral montmorillonite, thanks to its capacity for adsorption of various ions (mainly cations), and ion exchange.
The main disadvantage of layered silicates is a sharp drop in strength when wet, liquefaction under dynamic impact, swelling in flooding and shrinkage during drying. The hydrophilic binder is the reason for their incompatibility with the organic polymer matrix. This problem can be solved by modification of clay and organic matter.
There are various properties of clays. As organomodified layered silicates (OMSS) use of substances of different chemical nature of ionic and non-ionic origin. Ion organomodified used Quaternary ammonium salts (H) with aliphatic (hydrocarbon) radicals in which the number of methylene (-CH2-) groups varies from 14 to 18. In addition to the aliphatic radicals can be used, and other Quaternary ammonium salts, including those containing polar functional groups, for example, hydroxyethylamine or polyhydroxyethyl.
For example, a known polymer composition for insulation of wire and cable sheathing different significance is to be placed, representing stitched peroxides polyethylene, includes layered silicate, in particular, montmorillonite, modified Quaternary ammonium salts to impart hydrophobicity or, in other words organophilicity. The composition has a fire resistance, low smoke emission, low corrosivity, low toxicity .
A disadvantage of known composition is the length of the fusion process and the fact that this type of songs does not tolerate the presence of even traces of moisture (less than 500 ppm). Otherwise, moisture promotes pre-unwanted-linking of the polymer directly in the extruder, which, in turn, leads to a significant deterioration of the surface quality of the product and increase the number of electrical breakdowns applied to the wire insulation.
When used as a modifier silicates HOUR drying process is difficult, and received organogeny contain more than 2% water, which is accumulated and stored organomodified clay.
Completely different product, radically different chemistry matching is silanandabhivamsa composition of polyethylene.
Known silanandabhivamsa composition for manufacturing insulation membranes cable products, including polyolefin 93,5÷99,3% wt., vinylacetylene 0,1÷3,0 wt. -%, organic peroxide 0,1÷0,4% m is SS. and synergists - else, the presence of which provides high thermal deformation, and resistance to thermoelectron aging at elevated temperatures, and eliminates the possibility of premature crosslinking .
A disadvantage of the known solutions is the difficulty of obtaining through the use of specific compounds synergists, and, consequently, high cost of raw materials; a long time knitting; poor physical and mechanical characteristics of the products.
Solved by the invention is to improve the quality of products and simplifying the manufacturing process of the composition and increase shelf life.
The technical result is to eliminate these drawbacks and to make it possible to drain organogeny to a value of not more than 500 ppm, and to give the clay the resistance to moisture during storage to a value of not more than 1000 ppm., so you can increase performance and reduce the time knitting.
This result is achieved in that silanandabhivamsa composition comprising a polyolefin, vinylacetylene and organic peroxide, contains layered silicate modified resorcinol resin (PC) of the following structure
When the content of the components in the following ratio: polyolef is n (93,5÷99,3) mass, willcoxson (0,5÷2,0) mass, organic peroxide (0,1÷1,5) mass, organomodified layered silicate modified resorcinol resin (0,1÷3,0) mass
The ratio of the polyolefin modifier PC and layered silicate (clay) is 6 machine hours: 10 machine hours, respectively.
Additional technical result is achieved in that the composition as a polyolefin contains polymers of ethylene, copolymers of ethylene and alpha-olefins, preferably polyethylene low density polyethylene linear low density polyethylene, high density; organic peroxides composition contains peroxides classes of hydroperoxides, dialkylamides, dialkylamides, alkyl-aralkylated, PROXIFIER, preferably, dicumylperoxide.
The composition may contain a crosslinking catalyst, for example, dilaurate dibutylamine, for example, in an amount of 5 wt. parts concentrate catalyst crosslinking.
The use of layered silicate treated resorcinol resin for modification of the composition silanandabhivamsa polyethylene, is a significant contrast to all known from the prior art solutions.
It is established that the introduction of layered silicate from 6 machine hours to 10 M.Ch., PC helps improve the process of exfoliation of the clay and, as a consequence, to increase the mechanical and dolgovremennye characteristics of the final composition, compared with similar compositions.
To speed up the process of stitching can be used catalyst. The preferred catalyst is dilaurate dibutylamine.
The present invention can be izgotovlenie SIOPLAS technology, namely, that in the manufacture of insulation combines two components: silanolate polyolefin and concentrate crosslinking catalyst, and which can be dilaurate dibutylamine.
A composition consisting of a mixture silanolate polyolefin and concentrate catalyst is closed under the action of water.
|Implementation of the invention can be confirmed by the following examples|
|Component||The compositions in examples Mascali|
|Linear low-density polyethylene||93,5||94||95||99||98,1|
|Organomodified montmorillonite, modified resorcinol resin||0,1||0,5||1,0||3,0||0,8||0|
Comparative physico-mechanical properties are shown in table 2.
|Property||The properties of formulations in mixtures with 5 mass concentrate catalyst after stitching|
|The tensile strength, MPa||14,5||16,7||17,1||15,2||of 17.5||13,8|
|The change in tensile strength after 240 hours of thermal aging at 135°C, %||22||15||15||25||10||60|
|The time to reach the maximum degree of crosslinking in a water bath at 90°C, minutes||65||60||45||40||50||90|
|Thermal deformation, %||80||70||60||55||60||100|
The obtained results show significant improvement in properties silanandabhivamsa compositions with modified layered silicate treated resorcinol resin. The obtained rates surpass not only the characteristics of the composition of the prototype, but also compositions comprising ora is Nagini, modified HOURS.
Polymer composition characterized by a minimal set of features needed to provide a specific result, but not excluding the presence of any other components. This composition can be considered as the basis and to be useful in the production of polymer compositions for various purposes. Products made using the proposed composition, due to the property of layered silicate treated resorcinol resin have superior performance and long time preservation of the properties of the final composition.
The sources of information.
1. GB 2367064, publ. 27.03.2002, C08F 255/02, C08L 23/02
2. EN 2440633, publ. 28.09.2012, H01B 3/44.
1. Silanandabhivamsa composition for cable insulation, comprising a polyolefin, vinylacetylene and organic peroxide, characterized in that it contains a layered silicate modified resorcinol resin (PC) of the following structure:
in the following ratio of components, parts by weight:
|layered silicate modified|
when the ratio resorcinol resin
and the layered silicate is 6:10 parts by weight of
2. The composition according to claim 1, characterized in that the polyolefin contains polymers of ethylene, copolymers of ethylene and alpha-olefins, preferably polyethylene low density polyethylene linear low density, high density polyethylene.
3. The composition according to claim 1, characterized in that as organic peroxides contain peroxides that are related to classes of hydroperoxides, dialkylamides, dialkylamides, alkylarylsulphonates, PROXIFIER, preferably dicumylperoxide.
4. Composition according to any one of claims 1 to 3, characterized in that it contains a catalyst for the crosslinking.
5. The composition according to claim 4, characterized in that it contains 5 parts by weight of the concentrate catalyst crosslinking.
6. The composition according to claim 5, characterized in that the crosslinking catalyst contains dilaurate dibutylamine.
SUBSTANCE: invention relates to a curable sealing resin composition. The curable composition contains at least one anhydride-functionalised polymer in amount of 30-60 wt %, a polyol in amount of 10-25 wt %, an epoxide-functionalised polymer, oligomer or monomer in amount of 15-40 wt %, a urethane polyol-functionalised compound selected from a group consisting of urethane diol, polyurethane diol and combination thereof in amount of 5-15 wt % and a catalyst with respect to total weight of the resin. The resin composition can be cured at room temperature. Components used to prepare and cure the resin composition can be provided in form of two or more parts.
EFFECT: hydrolytic stability, high hardness, flexibility and low cost of production of the sealing resin which can be used to restore insulation and/or for environmental protection of cable joints, sealed articles etc.
13 cl, 4 tbl, 3 ex
FIELD: electrical engineering.
SUBSTANCE: proposed is a method for manufacture of insulation for a thermal lithium current source by way of pressing thermally insulating gaskets of a composition including finely dispersed silicon oxide with specific particle surface over 250 m/g, chrome oxide, ultrathin silica fibres and phenolformaldehyde resin.
EFFECT: thermal insulation manufacture method enables fabrication of thermally insulating gaskets with heat conductivity inferior to that still air and with high mechanical strength preventing destruction under impact loads, thus ensuring rigidity of the whole current source structure.
SUBSTANCE: composition for fixing wrapping articles contains A) 1-60 wt % of at lest one resin of α,β-unsaturated polyether based on at least one unsaturated mono-, di- or tricarboxylic acid and/or substance containing molecules with mono-, di- or tricarboxylic acid groups, at least one polyol, B) 0.1-80 wt % of at least one inorganic and/or an organic-inorganic hybrid component, having functional groups for reaction with components A) and C), where said hybrid components are polymers or colloidal solutions based on silicon, titanium or zirconium and oxygen atoms, which contain hydroxyl and/or alkoxy groups and/or hydroxyalkyloxy groups and/or organic fragments, which have epoxy and/or isocyanate and/or unsaturated groups, C) 2-80 wt % of at least one monomer and/or oligomeric unsaturated component, which is styrene, vinyl toluene, hexanediol dimethacrylate, butanediol dimethacrylate and/or (meth)acrylates of products of a polyaddition reaction of ethylene oxide with trimethylolpropane capable of reaction with components A and B, and D) 0-15 wt % conventional additives, where wt % is calculated relative the total weight of the composition.
EFFECT: excellent heat conductivity properties and high level of electrical insulation along with excellent adhesion and thermal stability.
6 cl, 1 tbl, 2 ex
SUBSTANCE: invention relates to cable engineering, in particular - to polymer compositions based on plastified polyvinylchloride (PVC) with reduced flammability, reduced hydrogen chloride release during burning, improved physicochemical properties which compositions are intended for insulation of inner and outer sheaths of wire and cable operated under increased fire hazard conditions. The electrically insulating composition contains PVC plasticate (85-90 wt %) and organoclay (5-15 wt %). The organoclay is represented by montmorillonite modified with carbamide or melamine at the following components ratio: montmorillonite - 80-95, carbamide or melamine - 5-20.
EFFECT: invention allows to improve environmental friendliness of the process and PVC plasticate physical and mechanical properties.
2 cl, 5 dwg
FIELD: electric insulating varnishes for impregnating windings of electrical machines and apparatuses.
SUBSTANCE: used in proposed Class F (155 °C) insulating varnish are epoxy-dian resin with epoxy group mass fraction of 16-18% and low-butane melamine-formaldehyde resin, as cross-linking agents, as well as tetrabutoxytitanium and 2-methylimidazole based complex at temperature of 140 °C, as curing catalysts. Varnish solvents are xylene and cyclohexanon. Proposed compounding of varnish implies use of raw materials taken in following proportion, part by mass: hydroxyl-containing oligoester, 37-44; epoxy-dian resin, 17.9-19.0; low-butane melamine-formaldehyde resin, 17.9-19.0; 2-methylimidazole, 0.09-0.1; tetrabutoxytitanium, 0.41-0.43; cyclohexanon, 0.42-0.56; xylene, 14-16.
EFFECT: reduced cost, enhanced availability and relative safety of cross-linking agents, enhanced fraction of nonvolatile materials, viability, and cementing capacity of varnish.
1 cl, 2 tbl, 9 ex
FIELD: electric insulating materials; synthetic resins or glass fiber laminates for producing binders of laminated plastics used, for instance, as insulation for low-voltage equipment.
SUBSTANCE: main drawback of prior-art binders is difficulty to predict, and in some cases to reproduce, curing and molding conditions. As a result, binder leak-out and its heavy loss, as well as flaws on glass fiber laminate surface may occur in the course of molding. Proposed binder for glass fiber laminate has ingredients and their proportion, as follows, mass percent: resol resin, 12-16; novolac resin CF-010, 2-16; epoxy resin, 12-16; n-tertiary butyl-phenol-formaldehyde resin 101L or 101K, 0.5-15; alcohol-toluene mixture (1 : 1), 40-50.
EFFECT: reduced leakage of binder in the course of molding, eliminated flaws on glass fiber laminate surface.
1 cl, 1 dwg, 1 tbl, 4 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to conducting polymer blend, which is prepared by selecting at least two mutually immiscible polymers and mixing them until into blend so that at least one of polymers forms continuous three-dimensional phase throughout the volume of blend. Thereafter, conducting metal-containing filler is added to blend. Difference in surface tensions between polymer(s) forming continuous three-dimensional phase and other polymers constituting polymer blend is equal at least 2 mN/m. Above-mentioned at least two polymers are selected from following polymer pairs: pair polyamide PA6 and polymer selected from group consisting of PA12 and polyolefin; pair PA66 and polymer selected from group consisting of PA6, polymethylmethacrylate, polycarbonate, polyethylene terephthalate, styrene/acrylonitrile copolymer, polystyrene, PA12, polyolefin, liquid-crystalline polymer, and polyoxymethylene; pair polybutylene terephthalate and polymer selected from group consisting of PA6, polymethylmethacrylate, polycarbonate, styrene/acrylonitrile copolymer, polyethylene terephthalate, polystyrene, PA12, polyolefin, liquid-crystalline polymer, and polyoxymethylene; pair polycarbonate and polymethylmethacrylate; pair polyethylene terephthalate and polymer selected from group consisting of polycarbonate, polymethylmethacrylate, polystyrene, PA6, PA12, and polyolefin; pair polymethylmethacrylate and polymer selected from group consisting of PA6, PA12, and polyolefin; pair polyoxymethylene and polymer selected from group consisting of polycarbonate, polymethylmethacrylate, polystyrene, PA6, PA12, and polyolefin; pair styrene/acrylonitrile copolymer and polymer selected from group consisting of polystyrene, PA6, PA12, and polyolefin.
EFFECT: enabled preparation of polymer blend with low content of conducting filler showing sufficient conductivity and good mechanical properties.
8 cl, 2 dwg, 4 tbl, 2 ex
FIELD: preparation of compositions for cables filling.
SUBSTANCE: the invention is pertaining to preparation of compositions for filling the cables used in the field of a distant data transmission. Prepare a composition containing (in mass %): a mineral or a synthetic oil - 70-90, the hydrogenated block of styrene and butadiene copolymer with radial structure - 2-15, polyethylene wax - up to 12. The block of the copolymer can be synthesized using silicon tetrachloride or stannic chloride. The technical result of the invention consists in improvement of the index of compositions drops-protection and a stability augmentation.
EFFECT: the invention ensures improvement of the index of compositions drops-protection and a stability augmentation.
7 cl, 2 tbl, 3 ex
SUBSTANCE: invention relates to a heterophase propylene composition for making articles by injection moulding, as well as a composition for improving strength of polypropylene at low temperatures. The composition contains a polypropylene matrix, an elastomer copolymer containing ethylene links, at least one C3-C20 α-olefin and optionally an unconjugated diene, high-density polyethylene which is bimodal or multimodal polyethylene and inorganic filler.
EFFECT: disclosed heterophase polypropylene has acceptable impact characteristics at -40°C without loss of hardness.
14 cl, 3 tbl, 14 ex
SUBSTANCE: invention relates to cross-linked polyethylene, a method of producing cross-linked polyethylene, as well as cross-linked polyethylene and articles, preferably pipes, made therefrom. The cross-linked polyethylene contains a multimodal ethylene polymer with density lower than 950 kg/m3, which is obtained via polymerisation in the presence of a catalyst with one active centre and having STR21 from 2 to 15 g/10 min and shear thinning index PSV2.7/210 from 5 to 10.
EFFECT: providing a polymer composition with improved cross-linking capacity, eg with cross-linking degree of at least 70%, flexibility and good processability.
14 cl, 3 tbl, 1 ex
SUBSTANCE: composition contains a high-molecular weight polyethylene component and a low-molecular weight polyethylene component, and has density of 0.940 g/cm3 or higher and melt strength of 18 cN or higher. The ratio of the weight-average molecular weight of the high-molecular weight component to the weight-average molecular weight of the low-molecular weight component in the composition is greater than 15:1 and less than 28:1, the high- and low-molecular weight polyethylene components being formed by polymerisation in one reactor. The composition is classified as PE 100 material and has the appropriate balance of properties. A tube made from the composition, subjected to an internal strength test, has extrapolated stress of 10 MPa or higher, when the internal strength curve of the tube is extrapolated to 50 or 100 years according to ISO 9080:2003(E).
EFFECT: improved operational characteristics.
22 cl, 3 dwg, 6 tbl
SUBSTANCE: invention relates to cross-linked multimodal polyethylene. Described is cross-linked polyethylene, which includes multimodal ethylene polymer with density less than 950 kg/m3, obtained by polymerisation in presence of catalyst with one active centre. Polymer has MFR21 from 10 to 20 g/10 min. Index of viscosity reduction in shifting of TVR2.7/210 is at least 4. Also described is application of multimodal ethylene polymer in production of cross-linked pipe and method of multimodal ethylene polymer obtaining.
EFFECT: obtaining good workability and essential cross-linking in one and the same polymer.
15 cl, 3 tbl, 2 ex
SUBSTANCE: invention relates to fibre made from a polyethylene composition, a method of making said fibre, fabric made from said fibres and a method of making said fabric. The fibre is made from a polyethylene composition which contains at least 80 wt % of a (co)polymer, which contains at most 100 wt % links obtained from ethylene and less than 20 wt % links of one or more α-olefin comonomers. The composition has density of 0.920-0.970 g/cm3, molecular weight distribution (Mw/Mn) of 1.70-3.5, flow melt index (I2) of 0.2-1000 g/10 min, molecular weight distribution (Mz/Mw) of less than 2.5 and vinyl unsaturation level of less than 0.1 vinyl groups per thousand carbon atoms present in the backbone chain of said composition. The disclosed fibre can have denier value per filament less than 50 g/9000 m, breaking strength of 0.1-15 g/denier and relative elongation less than 1500%.
EFFECT: fabric made from said fibre, both woven and nonwoven, have high tearing strength, improved softness and drapeability.
10 cl, 4 dwg, 10 tbl
SUBSTANCE: polymer composition contains a mixture of (i) a polymer selected from polyethylene, polypropylene, polystyrene, polyvinyl chloride or a mixture thereof (ii) cellulose, (iii) ammonium nitrate, (iv) nutrients selected from blue-green algae and/or yeast, and (v) water. This composition can be mixed with a pure base polymer to obtain a polymer master batch. The master batch of the composition can be mixed with a pure base polymer which is suitable for obtaining products which are biodegradable. Described also is a method of preparing a biodegradable polymer composition, a method of preparing a master batch of the biodegradable polymer composition.
EFFECT: biodegradation of the composition within 6 to 36 months, environmental safety, preparation of the biodegradable composition does not require special equipment.
15 cl, 27 ex
SUBSTANCE: multimodal ethylene copolymer has density of 924-960 kg/m3, melt flow index STR5 of 0.5-6.0 g/10 min, melt flow index STR2 of 0.1-2.0 g/10 min and shear thinning index IUVS2.7/210 of 2-50. The multimodal ethylene copolymer contains at most 100 ppm by weight of volatile compounds. The multimodal ethylene copolymer is obtained in two steps by polymerisation in the presence of a catalyst with a single polymerisation centre of ethylene, hydrogen and one or more alpha-olefin having 4-10 carbon atoms. A low-molecular weight component (A) of the ethylene polymer is obtained in a first polymerisation zone and a high-molecular weight component of the ethylene copolymer (B) is obtained in a second polymerisation zone. The first and second polymerisation steps can be carried out in any order and the next step is carried out in the presence of a polymer obtained at the previous step. Components (A) and (B) are present in the multimodal ethylene copolymer in amount of 30-70 wt % and 70-30 wt %, respectively, of the total amount of components (A) and (B). Component (A) has weight-average molecular weight of 5000-100000 g/mol and density of 945-975 kg/m3, and component (B) has weight-average molecular weight of 100000-1000000 g/mol and density of 890-935 kg/m3.
EFFECT: improved properties of the compound.
15 cl, 1 tbl, 3 ex
SUBSTANCE: film contains multilayered antioxygen barrier component, in which: i) active antioxygen barrier layer is located between two passive antioxygen barrier layers, or ii) passive antioxygen barrier layer is located between two active antioxygen barrier layers. Active layer contains oxygen-absorbing composition, which represents mixture of thermoplastic resin (A) with carbon-carbon double bonds mainly in main chain, salts of transition metal (B) and antioxygen barrier polymer (C). Passive layer contains material selected from group, including copolymer of ethylene and vinyl alcohol, polyvinyl alcohol and their copolymers and combinations. Multilayered antioxygen barrier component is located between sealing layer and stable to external impact layer. Invention also relates to package, containing food product and said film. Passive antioxygen barrier layers assist in preservation of antioxygen barrier properties of film after depletion of capacity to absorb oxygen of active barrier layer.
EFFECT: increased term of film service life.
9 cl, 6 dwg, 3 tbl, 3 ex
SUBSTANCE: pipe is made from spatially cross-linked polyolefin composition which is obtained by cross-linking a polyolefin composition. The polyolefin composition contains a base resin which contains a cross-linkable olefin homo- or copolymer (A) which contains hydrolysable silicon-containing groups, and filler (B). The filler is selected from mineral glass filler, feldspar, barites and carbon fibres.
EFFECT: disclosed pipe has significantly improved hardness and modulus of elasticity in tension.
13 cl, 2 tbl
SUBSTANCE: ethylene copolymers and a method of producing said copolymers are provided. More specifically, provided are ethylene copolymers which exhibit excellent processability and physical properties due to their polydispersity index of polymodal molecular weight distribution, achieved via a multi-step process using reactors which are connected in series or in parallel. The method involves: a) solution polymerisation of ethylene and C3-C18 α-olefin comonomer(s) in the presence of a catalyst composition containing a transition metal catalyst of chemical formula (1) and a cocatalyst; (b) passing a first copolymer synthesised at step (a) through at least another reactor containing ethylene or ethylene and at least one C3-C18 α-olefin, at temperature 90-220°C and pressure 20-500, at temperature higher than the reaction temperature at step (a) in the presence of the same catalyst composition as was used at step (a) to obtain a polymer at high temperature, which contains a copolymer combination of ethylene and C3-C18 α-olefin. In the second version of the method, copolymers from step (a) and (b) are obtained separately and (c) the first copolymer from step (a) is mixed with the second copolymer from step (b).
EFFECT: disclosed is an ethylene copolymer for making extrusion blown films, films made by casting, articles made by injection moulding, articles made by blow moulding or tubes made using said methods, wherein radicals and symbols assume values given in the claim.
14 cl, 3 dwg 4 tbl, 11 ex
SUBSTANCE: invention relates to processing plastic, particularly polyvinyl chloride-based polymer compositions, which are used in various industries, including for making insulation and sheaths of wires and cables. The composition contains 100 pts.wt polyvinyl chloride, 40-80 pts.wt plasticiser, 3-15 pts.wt heat stabiliser and 0.1-8.0 pts.wt filler, which is chemically deposited calcium carbonate with surface treatment with fatty acids with particle size of 15-70 nm.
EFFECT: introduction of said filler into the polyvinyl chloride-based composition reduces viscosity of the molten composition and increases frost-resistance thereof while preserving physical and mechanical properties.
1 tbl, 25 ex