Sealing materials containing diblock copolymers and methods of their production
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to the method of producing sealer-lubricant that comprises selecting diblock copolymer from the group of styrene-ethylene/butylene or styrene-ethylene, propylene and combination thereof. It also includes and combining diblock copolymer with mineral oil at temperature lower than that of glass transition of styrene zones. Proposed method can comprise also filtration of styrene-rubber diblock copolymer to produce particles sized to less than 1 mm.
EFFECT: sealer with higher creep resistance at 70 to 80°C.
6 cl, 3 dwg, 6 tbl, 7 ex
The technical field to which the invention relates.
The present invention relates to lubricants for use at the point of connection of communication cables. In particular, the present invention relates to lubricants containing diplachne copolymers, which are technologically advanced and are suitable to protect communication cables from environmental conditions.
The level of technology
Communication cables, such as electrical and optical cables are used in various environmental conditions. For example, communication cables can be placed in wet environments or to be buried under the ground. In such applications the communication cable must resist seepage of water, because water can significantly affect the characteristics of the cable. For example, in an electric cable water can disrupt the capacitive balance of the electrical conductor, to cause a short circuit of the electrical cable and cause a high resistance due to corrosion. Similarly, in the optical cable water can negatively affect the integrity of the optical cable. This is especially clearly expressed in the points of connection of communication cables (for example, cable splices, and connectors), which are usually more susceptible to the effects of humidity.
One solution to minimize water infiltration at the connection point which engages the premises communication cables into the housing at the connection point and the surroundings of the connection point water-insoluble filler type grease. Lubrication usually seals the connection point and stops the advancement of the water. However, the conventional lubricant, mainly used with associated cables, expensive and time-consuming to manufacture and are persistent problems for extended periods of time. There is therefore a need in the lubricant, which is technologically advanced and sustainable for use at the point of connection of communication cables.
The present invention is a method of sealing material. The method includes a stage on which provide dibley copolymer, where dibley copolymer contains styrene many areas and many rubber zones, and where the styrene zones have a glass transition temperature. The method further includes the step on which unite dibley copolymer with mineral oil at processing temperatures less than about the glass transition temperature of styrene zones.
In one embodiment, the present invention is characterized as a way to create a sealing material, comprising the steps, which provide a styrene-rubber dibley copolymer, filtered styrene-rubber dibley copolymer, to obtain a filtered styrene-rubber dibley copolymer with an average particle size of about one millime is R or less, and immerse filtered styrene-rubber dibley copolymer in mineral oil at a temperature of manufacture about 80°C or less.
In another embodiment, this invention is characterized as a sealing material, which contains mineral oil and styrene-rubber dibley copolymer, where the lubricant exhibits a blue tint when, essentially, no coloring additives.
In another embodiment, the lubricant contains a gel-like material.
The above is the essence of the present invention is not intended to describe each disclosed variant implementation of the or each embodiment of the present invention. The drawings and detailed description that follow more clearly illustrate options for implementation.
If not stated explicitly here, the following definitions apply:
References to a single composition or a composition containing both the singular and plural forms. For example, the term "styrene-rubber dibley copolymer" refers to one or more styrene-rubber diblathaim the copolymers, and the term "styrene-rubber-styrene triblocal copolymer" refers to one or more styrene-rubber-styrene triblock the copolymers.
"Styrene area" means rich in styrene region Bloch is on the copolymer, which contains at least about 66% by weight of styrene based on the total mass of the region.
"Rubber area" means rich in rubber area of the block copolymer, which contains at least about 66% by weight of the rubber, based on the total mass of the region.
"Cable" means any type of electrical or optical cable for communication or other use with any number of wires fiber from one to any desired number.
Brief description of drawings
Figure 1 is a perspective view of the cable coupling when used with lubricant according to the present invention, and the bonded pair cables.
Figa is a perspective view of the electrical connector input when used with lubricant according to the present invention.
FIGU is a perspective view of the electrical connector input when used with lubricant according to the present invention and a pair of wires.
Although the above drawings explain to one variant of the invention, other embodiments of also assumed, as noted in the discussion. In all cases, this disclosure presents the invention by means of a statement, and not limitation. It should be clear that specialists can be designed in many other mo is eficacia and options for implementation, which fall within the scope and essence of the invention. Drawings can be drawn not to scale. The same reference position used in all the drawings to designate identical parts.
Figure 1 is a perspective view of the cable coupling 10 when used with the sealing material 12, which may contain lubricating material 12 of the present invention, the bonded cables 14 and 16 and discrete connectors 18. Cable coupler 10 is an example of a suitable closed container for use with grease material 12. As shown, cable coupler 10 includes a cover 20A and 20b, which can be placed against each other to close the inner part of the cable termination 10. Cover 20A comprises a pair of protective cavities 22A and 24A located at the distal ends of the cover 20A and the main cavity 26a disposed between the distal cavities 22A and 24A. Similarly, the cover 20b comprises a pair of protective cavities 22b and 24b located at the distal ends of the cover 20b, the main cavity 26b disposed between the protective cavities 22b and 24b, and the lateral grooves 28 and 30.
The bonded cables 14 and 16 pass through the distal ends of the cover 20b and connected with discrete connectors 18. Lubricating material 12 of the present invention is located in each of the protective cavities 22A, 22b, 24A is 24b. Essentially, when the cover 20A and 20b are closed together, the lubricant 12 is hermetically closes the bonded cables 14 and 16 within the cable termination 10. This protects the connection between the bonded cables 14 and 16 in discrete connectors 18 from the conditions of the external environment such as humidity.
The lubricant 12 in its composition contains mineral oil and styrene-rubber dibley copolymer, where dibley copolymer, in fact, saves a significant amount of rubber chains forming cross-links between individual styrene areas deblocage copolymer (referred to here as "structure with physical cross-links")that originally provided by the manufacturer. The structure of the physical cross-links deblocage copolymer allows lubricant 12 to show a good anti-creep, even at elevated temperatures. Creep is a distinguishing characteristic of the fact that the lubricant will, ultimately, to flow, to achieve the lowest potential energy state. Creep and flow are undesirable properties of the lubricant, particularly when used at the point of connection of communication cables (for example, a cable termination 10). The reason is that the lubricant can, ultimately, be displaced from its recognize the con position, and as a consequence reveal the underlying surface conditions of the external environment such as humidity. Lubricating material 12 of the present invention, however, exhibits good anti-creep and does not flow from its original position even when subjected to temperatures up to or exceeding about 80°C. essentially, the lubricant 12 can continuously provide protection against conditions of the external environment over long periods of time.
The structure of the physical cross-links deblocage copolymer is maintained by forming a lubricating material 12 at a low temperature processing and (or) with shear mixing. The structure of the cross deblocage copolymer is temperature - and svyazavhsij. Without wanting to be limited by theory, it is assumed that, when the styrene-containing dibley copolymer is heated above the glass transition temperature of styrene zones rich in styrene region deblocage copolymer are rearranged and reduced in size. This impairs plexus rubber chains and the structure of the cross. As the structure of the cross is weakened, physical cross-linking, respectively, decreases. This reduces the mechanical strength and anti-creep perfectly what my lubrication. In addition, if the process combines shear mixing with heating above the glass transition temperature of styrene zones, then, basically, all the original structure with transverse relationship is lost. Essentially, the resulting lubricant behaves as a viscous liquid, which flows with time even at room temperature.
The lubricant 12, however, formed at a temperature of processing, supported at a level lower than about the glass transition temperature of styrene zones deblocage copolymer, which is usually about 100°C. As such, dibley copolymer lubricant 12 stores with physical cross-links. Suitable processing temperatures for the formation of the lubricant 12 contain a temperature of about 80°C. or less, particularly suitable processing temperatures for the formation of the lubricant 12 contain a temperature of about 50°C. or less, and even more particular case suitable processing temperatures for the formation of the lubricant 12 contain a temperature of about 30°C or less. The processing temperatures can be maintained at the above temperatures in many ways. For example, mineral oil may be heated to the desired above-mentioned temperature and maintained up until dibley copolymer and mineral oil connection is Auda. Alternatively, if the temperature is room temperature (i.e. approximately 25°C), no heating is required and dibley copolymer and mineral oil can be combined with environmental conditions.
As discussed above, the formation of physical cross-linking deblocage copolymer is temperature - and svyazavhsij. Essentially, the value of shear mixing, which can be used to form the lubricant 12, inversely proportional to the temperature treatment. When the temperature range is from 50°C to 80°C, suitable levels of shear mixing during the formation of the lubricant 12 contain Nikodimov levels or less (for example, without stirring). When the treatment temperature is less than about 50°C, suitable levels of shear mixing for the formation of the lubricant 12 contain moderate shear levels or less. Examples of moderate shear levels include those produced by a propeller stirrer or by hand mixing with a spatula and sufficient to moisten the particles deblocage copolymer and distribute them inside mineral oil. This allows you to handle lubricating material 12 on inexpensive equipment, which reduces processing costs.
Smason the first material 12 is formed by absorption of mineral oil in the rubber areas deblocage copolymer practically without breaking the styrene zones deblocage copolymer. This can be achieved by combining particles deblocage copolymer with mineral oil at a suitable temperature processing and (or) with shear mixing, as discussed above. Diploknema the copolymer, it is desirable to have a small average particle size, to increase the effective surface area in contact with mineral oil, consequently increasing the rate of absorb. Suitable maximum average particle size for deblocage copolymer to connect with mineral oil is approximately one millimeter. Especially suitable maximum average particle size for deblocage copolymer to connect with mineral oil is about 0.5 millimeter.
Dibley copolymer is usually acquired as kucukodabasi agglomerated chips that can be easily crushed to reduce the average particle size deblocage copolymer. This can be accomplished many ways. For example, dibley copolymer can be filtered, as defined here, dry dibley copolymer screened and pressed through a sieve with channels corresponding to the desired particle size. For example, a suitable sieve consists of a metal sieve with a mesh of 5.5 wires/inch (14 wires per inch with a wire diameter is 0.023 inches (0.009 inch), which is th available from Sefar America, Lumberton, NJ. The sieve may be placed over mineral oil, which allows the filtered particles deblocage copolymer to fall and dive directly into the mineral oil.
Dibley copolymer also preferably filled with mineral oil quickly, so mineral oil absorbed on the particles deblocage copolymer is almost uniform. This reduces the tendency of the particles deblocage copolymer to the formation of agglomerates. A good time to fill deblocage copolymer in mineral oil is about twenty minutes or less, specifically a good time to fill deblocage copolymer in mineral oil is approximately ten minutes or less, and even more specifically the appropriate time for filling deblocage copolymer in mineral oil is approximately five minutes or less. Portions deblocage copolymer can be filled continuously or in separate intervals during this time. If the agglomerates of particles deblocage copolymer formed on the surface of mineral oils, these agglomerates can be reduced by mixing.
As dibley copolymer and mineral oil are combined, the rubber zone deblocage copolymer absorb mineral oil up until practically be achieved Pres who ate saturation. The time required for the rubber areas to become almost saturated mineral oil depends on the processing temperature and the magnitude of applied shear mixing. Since rubber zones absorb mineral oil, the viscosity of the resulting mixture increases. Essentially, the increase in temperature reduces the time required for the formation of the lubricant 12.
After the rubber zone deblocage copolymer practically saturated with mineral oil, the resulting lubricant 12 is a gel-like material with visually distinct heterogeneous nature (i.e. numerous sticky balls, which are glued together). Additionally, air bubbles can be visually distinguishable within the lubricant 12. Air bubbles presumably derived from air, which occurs in particles deblocage copolymer and which is pushed when the rubber zone deblocage copolymer absorb mineral oil. Air bubbles can be subsequently removed from the lubricant 12 through the premises of the lubricant 12 in the vacuum. If the removal of air bubbles preferably, the lubricating material 12 may be placed in a vacuum immediately after particles deblocage copolymer dispersed in mineral oil. This allows the t to remove air before than lubricating material 12 forms a sticky mass. The resulting lubricant 12 is suitable for use as lubricating sealant and has anti-creep, even at elevated temperatures. In one embodiment of the present invention, the lubricating material 12 does not show virtually no creep when exposed to a temperature of about 80°C. or less, when tested in accordance with test creep, discussed below.
Another characteristic of the lubricant 12 is that after the formation of the lubricant 12 shows a blue tint to the naked human eye when illuminated environment, without the use of colouring. Coloring additives are defined here as any composition other than mineral oil or dibley copolymer, which affects the color of the lubricant 12 in the introduction. The blue tint is believed to exist because of the light, receiveas from rich styrene areas deblocage copolymer. On the contrary, ordinary oiling, which is formed at processing temperatures of about or above the glass transition temperature of styrene zones deblocage copolymer, are transparent and do not show a blue tint. As discussed above, exposure deblocage copolymer at high temperatures, as is lahaut, makes rich styrene region deblocage copolymer be reordered and shrink in size. Reduced dimensions-rich styrene areas, respectively, eliminate the visible light scattering. In one embodiment of the present invention the lubricant 12 shows a blue tint when tested in accordance with test structural degradation of the copolymer, are discussed below.
Suitable mineral oils for use in the lubricant 12 contain petroleum distillate hydrocarbon oils, such as paraffinic mineral oils, naphthenic mineral oils, and combinations thereof. Naphthenic mineral oils contain naphthenic groups (i.e. cycloparaffin) and have more than 35% by weight of naphthene and less than 65% by weight of paraffin, according to ASTM D2501-00. Paraffin mineral oils contain less than 35% by weight of naphthene and more than 65% by weight of paraffin. Examples of suitable commercially available mineral oils include trade designation "KAYDOL White Mineral Oil and trade designation "SEMTOL 40" White Mineral Oil, both commercially available from Crompton Corporation, Middlebury, CT. A suitable minimum concentration of mineral oil in the lubricating oil 12 is approximately 50% by weight, based on the total weight of the lubricant 12. A suitable maximum concentration of mineral mass is in the lubricating oil 12 is approximately 96% by weight, based on the total weight of the lubricant 12.
Suitable styrene-rubber diplachne copolymers for use in the lubricant 12 contain a styrene-isoprene, styrene-polybutadiene, styrene-ethylene/butylene, styrene-ethylene/propylene, and combinations thereof. Examples of suitable commercially available diblock copolymers contain trade designation "KRATON G1701" and "KRATON G 1702" Block Copolymers, both of which are commercially available from Kraton Polymers, Houston, TX, and "SEPTON 1020 S Block Copolymer, commercially available from Septon Company of America, Pasadena, TX. A suitable minimum concentration deblocage copolymer in the lubricant 12 is approximately 4% by weight, based on the total weight of the lubricant 12. A suitable maximum concentration deblocage copolymer in the lubricant 12 is approximately 15% by weight, based on the total weight of the lubricant 12.
Diplachne copolymers and mineral oil used in the present invention, have the same coefficients of thermal expansion. As such, the lubricant 12 shows bleed oils, when used at elevated temperatures. Many conventional lubricants used rheological modifiers and oil, which have significantly different coefficients of thermal expansion. Essentially, when conventional lubricants are heated in warm surround the it environment, the oil is separated from rheological modifiers (i.e. vyparivat). This leads to an oily residue on the surface of normal lubrication, which is undesirable.
Lubricating material 12 of the present invention may also contain additional components such as stabilizers, antioxidants, processing AIDS, styrene-rubber-styrene triblock copolymers, microspheres, silica, and combinations thereof.
Suitable stabilizers and antioxidants include phenols, phosphites, phosphates, ticinella, amines, benzoate and combinations thereof. Suitable commercially available phenol-key antioxidants include trade designation "IRGANOX 1035", "IRGANOX 1010" and "IRGANOX 1076" Antioxidants and Heat Stabilizers for use in the wires and cables from Ciba Specialty Chemicals Corp., Tarrytown, NY. A suitable maximum concentration of stabilizers or antioxidants in lubricating material 12 is about 1% by weight, based on the total weight of the lubricant 12. During the formation of the lubricant 12 stabilizers and antioxidants may be dissolved or dispersed in mineral oil before connecting deblocage copolymer with mineral oil.
Suitable styrene-rubber-styrene triblock copolymers for use in the sealing material 12 containing a styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), which is ol-ethylene/butylene-styrene (SEBS), styrene-ethylene/propylene-styrene (SEPS) and their combinations. Examples of suitable SEBS block copolymers for use in the sealing material 12 contain trade designation "KRATON G-1650 and KRATON G-1652" Block Copolymers, both of which are commercially available from Kraton Polymers, Houston, TX. In addition, suitable styrene-rubber-styrene triblock copolymers for use in the sealing material 12 also includes a styrene-rubber-styrene triblock copolymers, which are included as additives in some commercially available styrene-rubber diplachne copolymers. A suitable maximum concentration of the styrene-rubber-styrene triblocal copolymer in the sealing material 12 is the ratio of concentrations of about 1:2 by weight, relative to the styrene-rubber deblocage copolymer. Styrene-rubber-styrene triblocal copolymer is miscible with mineral oil together with diblathaim copolymer.
Suitable microspheres for use in the lubricant 12 contain functionalityand and not functionalityand hollow glass and plastic microspheres. Suitable hollow glass microspheres have an average particle size, by volume and effective top size (95%) from about 10 micrometers to about 140 micrometers and absolute density from 0.1 grams/cubic centimeter (g/cm3) to about 0.4 g/cm . The term "absolute concentration" is the concentration of a material, defined as mass per unit volume. Such hollow glass microspheres contain a large volume fraction of air (for example, about 90% to 95% air) and exhibit a dielectric constant of about 1.0. Essentially, hollow glass microspheres reduces the overall dielectric constant of the lubricant 12.
Examples of suitable commercially available hollow glass microspheres for use in the lubricant 12 contain the S Series, a Series and a Series of trade designations "3M SCOTCHLITE" Glass Bubbles from 3M Company, St. Paul, MN. Examples of particularly suitable ZM SCOTCHLITE Glass Bubbles contain 3M SCOTCHLITE K1 Glass Bubbles (absolute density of 0.125 g/cm3), 3M SCOTCHLITE K15 Glass Bubbles (absolute density of 0.15 g/cm3), 3M SCOTCHLITE A 16 Glass Bubbles (absolute density of 0.16 g/cm3), 3M SCOTCHLITE K20 Glass Bubbles (absolute density of 0.20 g/cm3), 3M SCOTCHLITE S22 Glass Bubbles (absolute density is 0.22 g/cm3), and combinations thereof. A suitable maximum concentration of microspheres in the lubricant 12 is about 20% by weight, based on the total weight of the lubricant 12. During the formation of the lubricant 12 microspheres can with mineral oil before, after or during the connection deblocage copolymer with mineral oil.
In one embodiment, this izaberete the Oia lubricant 12 is almost free from petroleum waxes, such as paraffin wax, which are solid at 25°Snetnaya waxes which exhibit a sufficiently high melting point, allowing them to contribute to the creep resistance, usually require high temperature processing (for example, 110°C or more). Such temperatures are usually higher than the glass transition temperature of styrene zones deblocage copolymer. As discussed above, this will lead to a reduction patterns cross deblocage copolymer. However, the lubricant 12 shows a good anti-creep without requiring the use of petroleum waxes.
Along with the fact that shows up with the cable clutch 10 with a protective cavities 22A, 22b, 24A, and 24b in figure 1, the lubricating material 12 may also be used in a wide variety of applications, such as electrical, opto-electrical (i.e. the combination of optical and electronic components and optical applications. For example, the lubricating material 12 may also be located within the discrete connectors 18, the main cavities 26a and 26b and the side positions 28 and 30. This provides additional protection of the bonded cables 14 and 16. Additional applications include cables, connectors (for example, discrete connectors, modular connectors, connection boxes and lubricant tanks) and plugs (for example the, stub subscriber inputs, filled with plugs, recessed plugs and terminal pads). An example of a particularly suitable application includes an electrical connector disclosed in U.S. patent No. 3.897.129 in the name of Farrar, Jr.
Figa and 2B are views in perspective of the electrical input connector 32 when used with lubricating material 12 of the present invention (not shown in figa or 2B). Electric induction connector 32 is an example of a particularly suitable closed container for use with grease material 12. As shown in figa, electric introductory connector 32 includes a housing 34 of the connector holes for wires 36, the cavity 38 of the housing, the U-shaped contact 40 and the cover 42. Holes for wires 36 and the cavity 38 of the housing are held in the housing 34 of the connector and, in fact, filled with a lubricant 12. U-shaped contact is located in the cavity 38 of the housing and contains the slots 44a and 44b and the slits 46a and 46b (slot 46b not shown figa). Cover 42 is connected with the cavity 38 of the housing through the movable hinge 48.
Figv shows electric introductory connector 32 when used with wires 50 and 52. During use of the wires 50 and 52 can be inserted into the holes 36 for the wires so that the ends of the wires 50 and 52 are held in the cavity 38 of the housing. This allows the lubricating material is from 12 to pass around the ends of the wires 50 and 52 and into the holes 36 for the wires. U-shaped contact 40 can then be pressed (i.e. pressed into the cavity 38 of the body)that makes the wires 50 and 52 to enter through the slits 44a and 44b and sections 46a and 46b, respectively. The pressing also collects part of the insulating layer on the wires 50 and 52 and creates electrical contact between the wires 50 and 52. Cover 42 may then be closed and attached to the body 34 of the connector, thereby closing the cavity 38 of the housing. The lubricant 12 effectively clog the holes for wires 36 and the cavity 38 of the housing from the conditions of the external environment that protects the connection between the wires 50 and 52 from moisture.
Analysis of the properties and characterization procedures
There are various analytical methods to characterize the lubricants of the present invention. Several of the analytical methods used here. Below is the explanation of these analytical methods.
The creep test
Lubricants of the present invention was measured qualitatively in accordance with the following procedure to determine at which temperature lubricants can continue to be anti-creep. The following procedure provides an excerpt of lubricants at different temperatures after the formation of the lubricant. It does not change the temperature the round processing for the formation of lubricants.
4 gram sample of the lubricant was smeared 2.54-centimeter (1,00-inch) wide by greasing tin-plated tin 0.64 centimeter (0.25 inch) in height. The tin was then placed in a thermostat at the desired temperature for one hour. After one hour the tin was removed from thermostat and remained at 25°C for one hour to cool off. Then the tin was installed in a vertical position and remained in a vertical position within 48 hours. After 48 hours was determined visually the amount of the lubricant, which moved from its original position, and were scored on a scale of 1-4. Table 1 provides a scale ranking and their corresponding criteria.
|1||Strong creep. The lubricant forms a horizontal surface and flows with cans at 25°C|
|2||Moderate creep. Visible leaking of the lubricant, but the lubricant does not form a horizontal surface.|
|3||Weak creep. Behavior is knosti lubricant smoother than the original, but large elements remain.|
|4||There is no creep. Small elements of the lubricant remains.|
The temperature at which the lubricant was subjected to, was changed from 25°C to 200°C.
Test the degradation patterns of the copolymer
Lubricants according to this invention was measured qualitatively in accordance with the following procedure for determining the degree of degradation patterns cross deblocage copolymer. As discussed above, the lubricants that keep the structure of the physical cross-links deblocage copolymer, have a blue tint due to the scattering of light from rich styrene areas deblocage copolymer. However, if the structure of the cross deblocage copolymer degrades, for example, when the lubricant is heated near or above the glass transition temperature of styrene zones deblocage copolymer, blue tint disappears. Essentially, one way or another, the manifestation of the blue tint of the lubricant is an indication, suffered or no lubricant is exposed to high temperatures during the formation or later.
A 250-gram sample of the lubricant was visually investigated in prozrachnoi-Unaway jar to see with the naked eye when the General lighting, did lubricant with a blue tint. The presence of blue color (when lubricating material essentially free from colouring) is evidence that the lubricant was not formed at processing temperatures near or above the glass transition temperature of styrene zones deblocage copolymer. The sample size used in this test, provides an adequate amount of lubricant to ensure a blue tint, if it is present. A smaller sample size may not be a blue tint due to less light scattering. This effect is similar to the scattering of light by water (i.e. a small Cup of water seems clear, while a large lake appears blue).
The present invention is more specifically described in the following examples, which are intended only as illustrations, since numerous modifications and variations within the scope of the present invention will be obvious to specialists. If not noted otherwise, all parts, percents and the relationships reported in the following examples, are in the mass ratio and all reagents used in the examples were obtained, or are available from chemical suppliers listed below, or can be synthesized by a conventional method is mi.
The following examples uses the following compound abbreviations:
"Kaydol oil - Mineral oil, commercially available under the trade designation "KAYDOL White Mineral Oil from Crompton Corporation, Middlebury, CT.
"G1701" - styrene-rubber dibley copolymer, commercially available under the trade designation "KRATON G1 701" Block Copolymer from Kraton Polymers, Houston, TX.
"G1702" - styrene-rubber dibley copolymer, commercially available under the trade designation "KRATON G1702" Block Copolymer from Kraton Polymers, Houston, TX.
"S1020" - styrene-rubber dibley copolymer, commercially available under the trade designation "SEPTON S 1020 Block Copolymer from Septon Company of America, Pasadena, TX.
"Irganox" - Antioxidant, commercially available under the trade designation "IR-GANOX 1010" Antioxidant from Ciba Specialty Chemicals Corp., Tarrytown, NY.
Each lubricant in examples 1-7 was formed in accordance with the following procedure. Table 2 provides the number of mineral oil and deblocage copolymer used for each sample, and the mass percentage of deblocage copolymer in the lubricant.
|Example||Dibley copolymer||Mass percentage deblocage copolymer||Dibley SOPs shall liner (grams)||Mineral oil (grams)|
The specified number of Kaydol oil was poured into a 16-oz can water flask and continuously stirred. Stirring was carried out at 500 rpm is inutu three-bladed steel stirrer and a pneumatic motor model 2AM-NCC-16 from Gast Manufacturing Corp., Benton Harbon, MI. Oil Kaydol was gently heated and 0.2% by weight (based on the total weight of the lubricant) antioxidant Irganox dissolved in oil Kaydol. Treatment temperature was then decreased and maintained at 25°C (i.e. without heating) and at atmospheric pressure. Dibley copolymer was then filtered and filled in the jar for five minutes. Dibley copolymer was filtered on a sieve of 5.5 wires/inch, with the diameter of the channel of) 0.157 cm (0,062"). The sieve was placed on the flask so that dibley copolymer was directly in peremestivsheesya mineral oil.
Mineral oil and dibley copolymer is then mixed in a flask at 25°C. and atmospheric pressure for an additional five minutes at the same speed mixing. After five minutes the stirring was stopped and the flask containing the resulting lubricant was placed in a vacuum supported 30 mm Hg up until the lubricant did not froth. Then the flask was removed from the vacuum, and the lubricant was maintained at 25°C. and atmospheric pressure for 12 hours. Then the lubricant was visually examined in accordance with the test degradation patterns copolymer discussed above. After the formation of each of the lubricants of examples 1 to 7 showed a blue tint. There is actually, lubricants have kept the structure of the physical cross-links them diblock copolymers after education.
The creep test for examples 1-7
After the formation of lubricants in examples 1-7 were tested in accordance with test creep discussed above. Tables 3 and 4 provide a scale ranking values of creep, which showed lubricants.
|Example 1||4 (none)||3 (weak)||3 (weak)||3 (weak)|
|Example 2||4 (none)||3 (weak)||3 (weak)||3 (weak)|
|Example 3||4 (none)||-||4 (none)||3 (weak)|
|Example 4||4 (none)||-||4 (none)||4 (none)|
|Example 5||4 (none)||-||4 (none)||4 (none)|
|Example 6||4 (none)||-||4 (none)||4 (none)|
|Example 7||4 (none)||-||4 (none)||4 (none)|
|Example 1||3 (weak)||1 (strong)||1 (strong)||1 (strong)|
|Example 2||3 (weak)||2 (moderate)||1 (strong)||1 (strong)|
|Example 3||3 (weak)||3 (weak)||1 (strong)||1 (strong)|
|Example 4||3 (weak)||3 (weak)||3 (weak)||2 (moderate)|
|Example 5||4 (none)||2 (moderate)||2 (moderate)||--|
|Example 6||4 (none)||4 (none)||3 (weak)||2 (moderate)|
|Example 7||4 (none)||4 (none)||2-3 (mild-moderate)||1 (strong)|
The data in tables 3 and 4 show that lubricants in examples 1-7 show a good anti-creep, even at elevated temperatures. In particular between 25°C and 100°C lubricants showed weak or no creep. As such, the lubricants of the present invention, generally retain their original position to protect the underlying surface from the conditions of the external environment such as moisture.
These data also show that resistance to creep at elevated temperatures depends on the concentration deblocage copolym the RA in the lubricant. In fact, lubricants in examples 5-7, which had a concentration deblocage copolymer 10% and 12.5% by weight, showed good anti-creep when aged at temperatures from 140°C to 160°C. however, The lubricants in examples 1 and 2, which had a concentration deblocage polymer 6% and 8% by weight, has shown adequate resistance to creep up to 140°C.
Test the degradation patterns of the copolymer of examples 1 -7
After testing creep lubricants in examples 1-7 were again visually examined in accordance with the test degradation patterns copolymer discussed above. Lubricants in examples 1-7, which remained at 25°C, and lubricants in examples 1 and 2, which were kept in an environment at 80°C, showed every blue tint. Essentially, lubricants according to this invention are particularly suitable for use at these temperatures. Lubricants in examples 3-7 were not tested at 80°C. However, due to the higher concentrations deblocage copolymer lubricants in examples 3-7, it is believed that such lubricants also would be blue.
Lubricants in examples 1-7, which was maintained in the environment of 100°C to 200°C, were transparent and did not show the blue tint. This correlates with lower opposition creep for these lubricants, as discussed above. Although these results relate to lubricants that have already been established at 25°C, they show how the heating of lubricants to temperatures above the glass transition temperature of styrene zones diblock copolymers affects the anti-creep and over. Conventional lubricants, which are heated to such temperatures, have a low anti-creep even at 25°C. in Contrast, lubricants according to this invention show good opposition at 25°C and even at elevated temperatures.
The modified creep test for examples 1-7
Lubricants in examples 1-7 were also subjected to the modified creep test. In this test, after each tin was removed from thermostat and was maintained at 25°C for one hour to cool off, the tin was then deflected in a vertical position and remained in a vertical position for four days instead of 48 hours). Any lubricants, which showed creep at this point, have been removed from the others in this test. Cans with residual lubricants were then placed in an oven at 70°C in an oven at 80°C for one hour to an upright position.
After one hour the samples were removed from the furnace, cooled and observed. The amount of lubricant, which has moved from its original position, was visually examined and evaluated on a scale of 1-4, discussed above in the creep test. Table 5 provides a scale ranking values of creep, which showed lubricants when exposed to the environment at 70°C. table 6 provides a scale ranking values of creep, which showed lubricants when exposed to the environment at 80°C.
|Example 1||4 (none)||N/T||N/T||N/T||N/T|
|Example 2||4 (none)||N/T||N/T||N/T||N/T|
|Example 3||4 (none)||N/T||N/T||N/T|
|Example 4||4 (none)||4 (none)||4 (none)||3 (weak)||N/T|
|Example 5||4 (none)||4 (none)||4 (none)||4 (none)||N/T|
|Example 6||4 (none)||4 (none)||4 (none)||4 (none)||4 (none)|
|Example 7||4 (none)||4 (none)||4 (none)||4 (none)||4 (none)|
|(IO) - not tested|
|Example 1||3 (weak)||N/T||N/T||N/T||N/T|
|Example 2||3 (weak)||N/T||N/T||N/T||N/T|
|Example 3||4 (none)||4 (none)||N/T||N/T||N/T|
|Example 4||4(none)||4 (none)||4 (none)||3 (weak)||N/T|
|Example 5||4 (none)||4 (none)||4 (none)||4 (none)||N/T|
|Example 6||4 (none)||4 (none)||4 (none)||4 (none)||4 (none)|
|Example 7||4(none)||4 (none)||4 (none)||4 (none)||4 (none)|
(H/T) is not a TEC who was rovals
The data in tables 5 and 6 show that the lubricants in the examples 1 to 7 showed good anti-creep, even when exposed to a temperature of 70°C and 80°C. essentially, the lubricants of the present invention is practically retain their original state, even when used in environments with elevated temperatures.
Although the present invention is described with references to preferred embodiments of the specialists will understand that there may be changes in form and detail without departing from the essence and scope of the invention.
1. The way to create a sealing material containing phases in which
provide dibley copolymer, where dibley copolymer contains styrene many areas and many rubber zones, and styrene zones have a glass transition temperature; and
combine dibley copolymer with mineral oil at processing temperatures less than about the glass transition temperature of styrene zones
this dibley copolymer selected from the group consisting of styrene-ethylene/butylene, styrene-ethylene/propylene and combinations thereof.
2. The method according to claim 1, characterized in that it further filtered dibley copolymer to provide a filtered dibley copolymer with an average particle size of about one millimeter eliminee before merging with mineral oil.
3. The method according to claim 1 or 2, characterized in that it further unite microspheres with mineral oil and deblocked copolymer.
4. The way to create a sealing material containing phases in which
provide a styrene-rubber dibley copolymer;
filter styrene-rubber dibley copolymer, to obtain a filtered styrene-rubber dibley copolymer with an average particle size of about one millimeter or less; and
immerse filtered styrene-rubber dibley copolymer in mineral oil at a temperature of processing about 80°C or less.
5. The method according to claim 1 or 4, characterized in that the treatment temperature is 50°C or less.
6. The method according to claim 1 or 4, characterized in that dibley copolymer is of 15.0% by mass or less in the sealing material, based on the total mass of the sealing material.
FIELD: chemistry; insulation.
SUBSTANCE: invention pertains to a cable with a coating layer, made from waste materials. The cable consists of at least, one conductor with at least one transfer element and at least one layer of coating. The coating material contains between 30 mass % and 90 mass % of the overal mass of the coating material, at least, first polyethylene with density not more than 0.940 g/cm3 and melt flow index from 0.05 g/10 min. to 2 g/10 min., measured at 190°C and a load of 2.16 kg in accordance with standard ASTM D1238-00, and quantity from 10 mass % to 70 mass % of the overall mass of the coating material, at least, second polyethylene with density of more than 0.940 g/cm3. The first polyethylene is obtained from waste material. Use of at least, one polyethylene with density of more than 0.940 g/cm3 in the recycled polyethylene allows for obtaining a layer of coating, capable of providing for mechanical characteristics, in particular, breaking stress and tensile strength, comparable to characteristics of primordial polyethylene. The stated coating layer is preferably used as an external protective coating.
EFFECT: obtaining of a new type of cable insulation.
43 cl, 9 dwg, 4 tbl, 10 ex
FIELD: cable engineering.
SUBSTANCE: proposed smoke-emitting plasticized PVC based polymeric composition used for manufacturing insulation and cable sheaths has following ingredients, mass by part: suspension polyvinyl chloride, 100; ester plasticizer, 40-90; lead stabilizer, 2-8; antimony trioxide, 2-10; zinc oxide, 2-4; boron acid, 2-5; ocher, 10-70; calcium stearate, 1-3; diphenylolpropane, 0.1-0.4.
EFFECT: enhanced heat resistance of composition, its compliance with requirements to smoking under conditions of burning, smoldering, and hydrogen chloride emission in burning.
1 cl, 2 tbl
FIELD: electrical engineering; polymeric compositions based on reduced-inflammability plasticized polyvinyl chloride.
SUBSTANCE: proposed suspended polyvinyl chloride based polymeric composition designed for insulating internal and external sheaths of wires and cables has following ingredients, mass percent: suspended polyvinyl chloride, 100; ester plasticizer, 45-70; chlorinated wax and/or chlorinated alpha-olefins, 15-20; tribasic lead sulfate, 5-7; calcium stearate, 1-2; aluminum hydroxide or magnesium hydroxide, 45-60; antimony trioxide, 5-10; diphenyl propane, 0.1-0.5; 4.4'-isopropylidenediphenol epoxy resin, 23-4; carbon black, 0.5-2.0.
EFFECT: reduced inflammability, enhanced volume resistivity, thermal stability, and melt fluidity of composition.
2 cl, 1 tbl, 11 ex
FIELD: insulation materials.
SUBSTANCE: invention relates to polyethylene composition for insulation of conductors and cables, which exhibits improved scorching resistance and consists of (i) polyethylene and scorching inhibitor having melting point under atmospheric pressure below 50°C and being compound depicted by general formula I, wherein R1 represents optionally phenyl-substituted С1-С20-alkyl, С2-С20-alkenyl, С3-С20-alkynyl, С3-С9-cycloalkyl, phenyl, or tolyl; R2 and R3, independently from each other, represent С1-С20-alkyl optionally substituted by following substituents: phenyl, one or two hydroxyls, cyano group, formyl, acetyl, and -O-COR5; R5 represents С1-С20-alkyl, С2-С20-alkenyl, С3-С20-alkynyl, or optionally hydroxyl-substituted С3-С9-cycloalkyl; phenyl, 4-chlorophenyl, 2-methoxycarbonylphenyl, p-tolyl, 1,3-benzothiazol-2-yl, -(CHR6)nCOOR7, or -(CHR6)nCONR8R9, wherein n=1 or 2, R6 represents hydrogen atom or С1-С6-alkyl; R7 С1-С20-alkyl optionally interrupted with 1-5 O or S atoms, С5-С7-cycloalkyl, phenyl, benzyl, or tolyl; R8 and R9 each represents hydrogen atom or С1-С6-alkyl; R4 represents hydrogen atom or methyl; and (ii) organic peroxide. Composition may be extruded with minimum preliminary cross-linking, even at sufficient cross-linking rate. Polyethylene composition for insulation of conductors and cables with improved scorching resistance is described, which composition additionally contains an amine selected from group consisting of diphenylamine, 4-tert-butyldiphenylamine, 4-tert-octyldiphenylamine, 4,4'-di-tert-butyldiphenylamine, 2,4,4'-tris-tert-butyldiphenylamine, 4-tert-butyl-4'-tert-octyldiphenylamine, o,o', m,m'- or p,p'-di-tert-octyldiphenylamine, 2,4-di-tert-butyl-4'-tert-octyldiphenylamine, 4.4'-di-tert-octyldiphenylamine, 2,4-di-tert-octyl-4'-tert-butyldiphenylamine. This composition may be extruded with minimum preliminary cross-linking, even at sufficient cross-linking rate. Method for preparing cross-linked polyethylene composition is also disclosed. (I).
EFFECT: enhanced resistance against preliminary vulcanization at simultaneously preserved satisfactory vulcanization rate and density of cross linkages formed.
3 cl, 5 tbl
FIELD: electrical communication components; cables whose conductors are covered with polymeric insulation extruded about conductor.
SUBSTANCE: proposed cable has its conductors covered with insulation that has at least one component incorporating maximum 20, and best of all 15, mass percent of polymer characterized in high degree of extrudate swelling. This polymer is defined as that characterized in extrudate swelling degree over 55% and higher, best of all that having extrudate swelling degree over 65%. Best insulation has at least second component of high degree of cracking resistance under stress; therefore, minimal combination of these polymers will provide for insulation layer possessing unique combination of physical properties, including high degree of foaming, fine uniform cellular structure, reduced attenuation, and cracking resistance under stress which is capable of sustaining temperature of 100 °C over 100 h without cracking in spirally coiled state at stress level one-fold higher than outer diameter of insulation.
EFFECT: improved electrical characteristics and mechanical strength of insulation.
23 cl, 6 dwg, 3 tbl
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating sheaths of cables and wires operating under high fire hazard conditions has following proportion of ingredients, part by mass: suspension polyvinyl chloride, 100; ester plasticizer, 35 - 65; lead stabilizer, 2 - 7; calcium carbonate, 5 - 45; aluminum oxide trihydrate, 20 - 100; antimony trioxide, 5 - 9; zinc oxide, 0.5 - 8; and newly introduced zinc borate, 0.5 - 8; calcium stearate, 1 - 3; calcium chloride, 0.1 - 2 or calcium oxide, 0.1 - 2.
EFFECT: enhanced fire resistance at low degree of smoke emission under fire conditions.
1 cl, 1 tbl
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating general industrial cable and wire sheaths to reduce fire occurrences due to inflammation of cables and wires has following ingredients, mass percent: polyvinyl chloride suspension, 100; ester plasticizer, 25 - 75; lead stabilizer, 1 - 7; calcium stearate, 0.7 - 3; diphenylolpropane, 0.1 - 0.8; zinc oxide, 0.5 - 8; zinc borate, 0.5 - 5; calcium chloride, 0.1 - 2 or calcium oxide, 0.1 - 2; calcium carbonate, 5 - 90; antimony trioxide, 0.5 - 9; and carbon black, 1 - 8.
EFFECT: reduced inflammability and smoke-forming capacity due to introduction of zinc oxide, zinc borate, and calcium chloride or calcium oxide.
3 cl, 1 tbl
FIELD: electrical engineering.
SUBSTANCE: proposed polymeric insulating composition given in description of invention together with description of cables and wires covered with such composition to ensure their excellent performance in service has 60 to 90 mass percent of copolymer A of ethylene and α-olefin produced by copolymerization with aid of concentric catalyst and 40 to 10 mass percent of polyolefin resin B other than copolymer A and includes polyolefin incorporating grafted substituents with dipole moment 4 D or higher. One of alternative compositions uses semiconducting composition as semiconductor layer. In particular cases ethylene and α-olefin copolymer is produced by polymerization with aid of Ziegler-Natta catalyst.
EFFECT: facilitated production.
8 cl, 2 tbl
FIELD: cable industry.
SUBSTANCE: proposed composition designed for insulating and sheathing cables and wires meant for operation under high fire hazard conditions incorporates following ingredients, parts by weight: suspension polyvinyl chloride, 100; ester plasticizer, 30 - 70; tribasic lead sulfate, 2 - 6; calcium carbonate, 20 - 300; zinc oxide, 0.5 - 10; aluminum oxide trihydrate, 20 - 70; antimony trioxide, 3 - 8; zinc borate, 0.5 - 8; zinc stearate, 0.25 - 4. Zinc borate and stearate introduced in definite proportion into proposed composition have made it possible to improve fire-safety characteristics of the latter.
EFFECT: reduced emission of smoke and hydrogen chloride in burning, enhanced degree of inflammability.
1 cl, 1 tbl
FIELD: insulating materials for telecommunication cables.
SUBSTANCE: polyolefin insulation of conductors in hydrocarbon lubricant filled telecommunication cable which is then placed in junction box operating in the open is susceptible in particular to adverse impact of heat, oxygen, and moisture. In order to ensure reliable functioning of these conductors under mentioned conditions, use can be made of combination of one or more primary phenolic antioxidants chosen from N,N'-hexane-1.6-diilbis-(3(3.5-di-tertiary-butyl-4-hydroxyphenylpropionamide)), tris(3.5-di-tertiary-butyl-4-hydroxybenzyl)isocyanin-rhata, and tris(2-(3.5-di-tertiary-butyl-4-hydroxyhydrocinnamoyloxy)-ethyl)isocyanourate together wit one or more alkyl hydroxyphenyl alkanoylhydrazine metal deactivators.
EFFECT: enhanced oxidation resistance of polyolefin insulation of conductors.
8 cl, 1 tbl, 1 ex
SUBSTANCE: described is hardened composition containing: polymer polythioether; and polyepoxy-compound based on multi-base acid, in which polymer polythioether is obtained by method including the following stages: carrying out reaction of first polythiol with compound having one epoxy-group and second group, different from epoxy-group, which can react with thiol group with formation of first prepolymer, where polytiol preferably reacts with second group; carrying out reaction of first prepolymer and second polytiol with epoxy-group until second prepolymer is obtained; and carrying out reaction of second prepolymer and third polytiol with polyvinyl ether and polyfunctionalising agent. Also described is method of obtaining said above hardened composition, its application as sealant, leak-proof sealing up.
EFFECT: improved corrosion stability and adhesion of said hardened compositions under impact of fuels.
15 cl, 6 tbl, 2 ex
SUBSTANCE: invention relates to flat sealing material for manufacturing cylinder head gaskets. Material represents composite film reinforces with fibre and/or binding substance and made from first fibre (polyetherketone), second reinforcing fibre (aramid, carbon and their mixtures) and binding substance. Sealing material is produced by pressing one or more fibre sheet.
EFFECT: obtaining sealing product which is thermally stable at operating temperature to 330°C and has general layer thickness from 0,01 to 3 mm.
SUBSTANCE: ready-for-use composition of drying-type binding mix includes binding substance, thickening system, filler, water and biocide, with thickening system containing non-linked sodium carboxymethylcellulose (CMC) with bottom limit of degree of substitution (DS) of 0.76 and bottom limit of polymerisation degree (DP) of 1000 at amount of 0.01 to 0.6 wt % of the total composition weight. CMC with degree of carboxymethyl substitution (DCMS) over or equal to 0.76, optionally together with non-ionogenic thickening agent, or CMC with DCMS under 0.75 is used as modifier of rheological properties and partial clay substitute in binding compositions.
EFFECT: elimination of most negative properties of clay in binding substance.
38 cl, 3 tbl
SUBSTANCE: invention concerns multicomponent local foam system for obtaining foam polyurethanes for local construction purposes, consisting of polyisocyanate (component A), and polyene containing water (component B), stored in separate containers, and epoxy resin based on bisphenol A and bisphenol F, and/or siloxane forpolymer with average mol weight from 200 g/mol to 10000 g/mol with reactive end alcoxy groups (component C), generic catalyst for polyurethane generation reaction and/or generic binding agent for siloxane forpolymer (component D) in spatially divided form, and optional filler, one or more colourants or pigments and generic additives. When mixed, the components of foam system form interpenetrating polymer mesh structure out of foamed polyurethane and at least one other polymer, with excellent adhesion to adjoining wall material, thus reducing water penetration or forming mechanically stable cork in case of fire to render resistance to fire. Claimed foam system is foaming and solidifying in severe conditions on construction site, e.g. at temperatures from 0°C to 40°C, and non-homogeneously filling of volume.
EFFECT: sealing of fractures and/or through orifices in building walls and/or floors.
23 cl, 2 tbl, 2 ex
SUBSTANCE: proposed paste contains non-equilibrium content alloy powder with excess metal, capable of diffusion hardening and thermal reaction when heated with gallium. Gallium, saturated with nitrogen at pressure of not less than 5 MPa and temperature equal to melting point of gallium, is used in the paste. Minimum weight content of gallium is between 30% and 60%. Diffusion hardening temperature of the paste lies between 29.7°C and 700°C and the time interval lies between 2 and 8 hours.
EFFECT: increased strength of the paste.
SUBSTANCE: invention relates to anaerobic sealing compositions used for sealing and locking threaded cylindrical or flanged joints. The composition contains ether of methacrylic acid, i.e. a mix of aromatic and aliphatic oligo ether acrylates containing at least 10 wt % of aromatic oligo ether acrylate, the initiating additive and accelerating additive, i.e. pre-alloyed mix of sulphonamide, amine and hydrazine compounds taken in the molar ratio of (2-2.5):1:1, a stabilising additive and filler.
EFFECT: improved quality of anaerobic composition due to reduction in time of assembling at ambient temperature after introducing proposed composition into threaded cylindrical or flanged joint.
2 tbl, 20 ex
SUBSTANCE: invention refers to adhesive polymer composite material, method of production thereof, product keeping its shape, and hermetic or adhesive composition containing mentioned composite material used in automotive engineering, constructional engineering, wood working, printing industry, footwear industry, as well as in sealing materials and insulation substance. The task in view is solved due to application of polymer composite including at least one hydrogenated or nonhydrogenated polymer nitrile rubber with Mooney viscosity (ML 1+4 at 100°C) less than 30 at least one cross-linking agent or vulcanizing system, and if required at least one bulking agent. Hydrogenated or nonhydrogenated polymer nitrile rubber is derived from metathesis reaction of polymer nitrile rubber with one or several compounds of general formulas I, II, III or IV. If required it is followed by hydrogenation.
EFFECT: development of composite material with long adhesive capacity, elasticity and thermal stability.
9 cl, 3 tbl, 3 ex
SUBSTANCE: hardened by moisture composition of hermetic contains (in wt %): amorphous poly-alpha-olefin polymer with silane functional group (5-80), thermoplastic elastomer (10-75) and gluing agent (5-60), as well as versions of insulating glass packets with application of claimed hermetic.
EFFECT: hermetic composition is suitable for combination of glass with various substrates.
12 cl, 1 tbl, 3 ex
SUBSTANCE: grouting compound contains, wt %: mineral binding agent - expanding alumina, gypsum alumina cement, portland cement, lime, salts of silicic or phosphoric acids or their mixture - 50-95, and expanding additive, which is a product of acid and/or base interaction with cement - 5-50. To produce compound expanding additive is prepared by acid and/or base interacting with cement in water-disperse medium, suspension curing, drying, milling and mechanical mixing all compound components.
EFFECT: prevention of all leaks and reinforcement of element fixing in construction structures.
8 cl, 2 tbl, 7 ex
SUBSTANCE: oxidised styrene-butadiene thermoplastic elastomer is used as the bonding agent, which has at its ends macromolecules of reactive carboxyl or hydroxyl groups, with a prevalence of the later; as the hardening agents of the polyisocyanates with a fraction of the total mass of the isocyanate groups not less than 30%, as the filler fine-dispersed mineral powders or pigments, as the modifying components - micro-reinforcing filler - wollastonite, as the plasticiser - dibutyl phthalate, additionally added is a curing agent - oil-thallous siccative and a stabiliser - styrenated diphenylamine BTC-150 or BC-30A; with the following ratio of components by mass %: oxidised styrene-butadiene thermoplastic elastomer 52.0-60.0; hardening agent polyisocyanate 7.0-9.0; hardening agent siccative 1.2-1.7; filler - fine-dispersed mineral powder or inorganic pigments 20.0-29.0; plasticiser - dibutyl phthalate 0.6-0.8; modified additive - wollastonite 6.0-8.0; phenol type stabiliser BTC-150 BC-30A 1.2-1.5, and the composition does not contain any organic solvents.
EFFECT: reduction in the shrinking deformation, increasing hardness, lowering the temperature of using the composition.
1 cl, 2 tbl, 13 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.
EFFECT: enhanced waterproofing properties.
15 cl, 2 tbl, 11 ex