31 results about "Polymetaphosphate" patented technology

A polymetaphosphate composition and method for temporarily sealing a perforation in a wellbore to facilitate a treatment therein and a well tool which can include a flow path, and a flow blocking device which selectively prevents flow through the flow path. The well tool can include a polymetaphosphate composition. A method of constructing a downhole well tool can include forming a structure of a solid mass comprising a polymetaphosphate composition, and incorporating the structure into the well tool.

The invention discloses a solution for achieving in-situ hole sealing on a micro-arc oxidation coating on a magnesium alloy surface and a preparation method of the micro-arc oxidation coating, and belongs to the field of magnesium alloy surface processing technology. The preparation method of the solution comprises the following steps: dissolving fluotitanate, polyphosphate, and polymetaphosphate in distilled water, adding hydroxides to generate a large amount of white colloidal suspension particles, adding an organic additive, adjusting the pH value to 5-10, and allowing the system to stand still for a whole day so as to obtain the solution. A magnesium alloy work tool is soaked in the solution to carry out micro-arc oxidation so as to obtain the micro-arc oxidation coating. The electrolyte will carry out hydrolysis reactions to generate TiO2 sol particles, the TiO2 sol particles will participate in the micro-arc oxidation film-forming process, and thus the formed micro-arc oxidation coating is mainly composed of titanium-containing oxides having a good chemical stability; because the freezing points of the substances in the coating are different, the micro pores in the coating are sealed automatically during the film-forming process, and thus the post treatment of pore sealing is saved.

The invention relates to a manufacturing method for coating capable of reducing heating oxidation burning loss of steel billets and a using method of the coating and belongs to the technical fields of chemical materials and production process thereof. The chemical formula of the aid comprises the following components in percentage by weight: 10 to 15 percent of silica sol binder, 20 to 30 percent of aluminum polymetaphosphate curing agent, 12 to 18 percent of zirconium oxide, 20 to 30 percent of silicon carbide, 15 to 22 percent of aluminum oxide and 1 to 5 percent of polycarboxylic acid water reducing agent. The preparation method comprises the following steps: mixing the chemical agents with proper content and proper granularity uniformly; grinding and sieving by using 600-mesh sieve; and storing 10 to 15 percent of silica sol binder and 1 to 5 percent of polycarboxylic acid water reducing agent respectively and singly to obtain the coating. The invention provides preparation method of the chemical acid and a using method of the chemical acid. The chemical aid has a simple formula, an obvious effect, and low cost, and the using method is simple, and is suitable for reducing the heating oxidation burning loss of the steel billets. The aid can effectively reduce the heating oxidation burning loss of the steel billets by over 80 percent.

The invention discloses a polycarbonate composition. The polycarbonate composition comprises the following components including, by weight, a, 29.9-79.9 parts of polycarbonate, b, 8.1-50.1 parts of a graft polymer, c, 4.8-24.8 parts of a fire retardant and d, 0-9.9 parts of other auxiliaries; the sum of the parts by weight of the four components including the a, the b, the c and the d is 100 parts, and the composition is based on the fact that the content of phosphorus oxychloride in the total weight of the polycarbonate composition is less than or equal to 80 ppm and lager than or equal to 0.1 ppm. According to the polycarbonate composition, in the polycarbonate composition formula, on the basis that when the content of the tested phosphorus oxychloride in the total weight of the polycarbonate composition does not exceed 80 ppm, the generation of stable compounds such as phosphoric acid and polymetaphosphate is facilitated by the trace level reserved phosphorus oxychloride, the generation of carbon layers is further promoted, meanwhile, the dispersing of phosphorus containing the fire retardant in the composition is improved, finally, the fire resistance and the melt stability of the polycarbonate composition can be evidently improved, and in addition, the polycarbonate composition is particularly suitable for occasions with high using environment requirements.

The invention relates to a Waterproof flame-retardant wheat straw board preparation method, and belongs to the technical field of building board preparation. According to the preparation method, silica gel microencapsulated modified ammonium polyphosphate is obtained through melamine modified ammonium polyphosphate at first, then, bean pulp, peanut meal and dried blood are added, an adhesive is obtained, wheat straw power is mixed with the adhesive and stirred to obtain a mixture, the mixture is placed in a lock mold for cold pressing and is dried, cut and ground, and a finished board productis obtained. Ammonium polyphosphate is modified through melamine and a silane coupling agent, a silicon-oxygen compound stable in chemical performance is generated, meanwhile, the microencapsulated structure achieves an isolation effect, and accordingly, the heat stability of the ammonium polyphosphate is improved; the ammonium polyphosphate is modified through the melamine, the specific surface area and surface energy can be increased, the flame-retardant effect is achieved, meanwhile, polyphosphoric acid or polymetaphosphate is generated, and the flame-retardant performance is further improved; and surface activity modification is conducted on protein through lauryl sodium sulfate, thus, the crosslinking density of the generated adhesive is improved, and the wide application prospects can be achieved.

Novel completion fluid compositions for fluid loss control during completion and workover operations conducted on a wellbore penetrating a subterranean formation are disclosed. In particular, the composition is a weighted brine fluid having a polymetaphosphate composition, a biopolymer suspension agent, and a fluid loss control additive. These novel compositions provide a means to temporarily seal a wellbore communicating with a subterranean formation to enable completion or workover operations to be performed, after which the composition can be removed by contact with an acidic composition.

The invention relates to a preparation method of a furnace bottom roller graphite carbon sleeve impregnating solution, belonging to the technical field of graphite carbon product processing. Raw materials include water, polyphosphate, polymetaphosphate, inorganic additives, active additives, dispersing agents and trace additives. When in use, a graphite product (2) is heated to reach 300-500 DEG C, and the heated graphite product (2) is impregnated into an impregnating solution inside a pressurized impregnating device (3) for 18-30 hours at the temperature of 70-120 DEG C and the pressure of 0.4-0.6 MPa while the graphite product (2) is hot. The invention has the advantages of simple process and convenience for operation and is beneficial to the industrial implementation.

The invention discloses a high-thermal-conductivity flame-retardant polyethylene sheath material for a refrigerator power line. According to the polyethylene sheath material, nano-magnesium hydroxide is subjected to silane surface modification and then serves as a flame retardant, so that the hydrophobicity of magnesium hydroxide is relieved to some extent, the compatibility of magnesium hydroxide in a polymer is improved, and the effects of improving the mechanical performance and flame retardance of the material are achieved; red phosphorus is subjected to encapsulation modification, so that the problem that red phosphorus is likely to absorb moisture and poor in safety is relieved; encapsulation-modified red phosphorus forms phosphoric acid or metaphosphoric acid when heated and then forms strong dehydrant polymetaphosphate, so that decomposition of magnesium hydroxide is accelerated, and synergistic flame retardation is achieved. Besides, inorganic filler hemp stalk ash is subjected to chemical surface modification, so that the compatibility of inorganic filler hemp stalk ash in a polymer is improved, and the mechanical strength and abrasion resistance of the product are improved; through compatibility of the material and other effective auxiliaries, the obtained polyethylene sheath material has high thermal conductivity and broad application prospects.

The invention discloses an anti-aging and anti-tension flame-retardant polyethylene sheath material for a refrigerator power line. Nano-magnesium hydroxide is subjected to surface silane modification and then serves as a flame retardant, so that the hydrophobicity of magnesium hydroxide is improved to some extent, the compatibility of magnesium hydroxide in a polymer is improved, and the effects of improving the material strength and flame retardance are achieved; red phosphorus is subjected to encapsulation modification, so that the problems that red phosphorus is likely to absorb moisture and poor in safety are relieved; when heated, red phosphorus subjected to encapsulation modification forms phosphoric acid or metaphosphoric acid and then forms the strong dehydrant polymetaphosphate, so that decomposition of magnesium hydroxide is accelerated, and a synergistic flame-retardant effect is achieved. Besides, the inorganic filler attapulgite is subjected to surface chemical modification, so that the compatibility of the inorganic filler attapulgite in the polymer is improved, and the mechanical strength and wear resistance of the product are improved; in compatibility with other effective auxiliaries such as boron fibers and asphalt emulsion, the obtained polyethylene sheath material has excellent aging resistance and tensile strength.

The invention discloses a damping sealing element for a motor. The damping sealing element is prepared from the following raw materials in parts by weight: 25-45 parts of nitrile rubber, 20-30 parts of fluororubber, 1.5-2.5 parts of 2,5-dimethyl-2,5-bis(tert butyl peroxy)hexane, 1-3 parts of benzothiazole disulfide, 1.8-2.5 parts of 1,3-bis(tert butyl isopropyl peroxide) benzene, 0.5-1 part of zinc oxide, 1.5-2.5 parts of fluorinated polyamide, 5-10 parts of modified cotton ramie fiber, 3-5 parts of hydrate calcium silicate, 2-4 parts of a chelate titanate coupling agent, 15-25 parts of magnesium oxide, 10-20 parts of molybdenum disulfide, 15-25 parts of pumice powder, 5-15 parts of sea-foam stone powder, 2-6 parts of carboxymethylcellulose, 1-2 parts of hexafluoroisopropylidene diphenol, 0.5-1.5 parts of polymetaphosphate, 2-4 parts of chlorinated paraffin, 1-3 parts of triethyl citrate and 2-4 parts of fatty alcohol. The damping sealing element has a special micro-pore structure, has good compression resilience, good abrasive resistance, an excellent damping effect and an excellent sealing effect.

Soluble pharmaceutical composition for the treatment of articular pathologies comprising an effective amount of a least one linear or cyclic polymetaphosphate or a soluble and pharmaceutically acceptable salt thereof, and appropriate diluents.

The invention discloses a high abrasion-resistant rubber sealing piece. The high abrasion-resistant rubber sealing piece comprises the following raw materials in parts by weight: 40 to 60 parts of nitrile rubber, 30 to 50 parts of ethylene-propylene- diene-terpolymer rubber, 2 to 4 parts of 4,4'-(hexafluoroisopropylidene)diphenol, 4 to 10 parts of cyclodextrin, 1 to 3 parts of polymetaphosphate, 4 to 8 parts of chelating type titanate coupling agent, 6 to 10 parts of magnesium hydroxide, 15 to 25 parts of barium titanate, 20 to 30 parts of bismuth oxide, 10 to 20 parts of lardite powder, 20 to 30 parts of oil shale, 10 to 15 parts of modified cotton ramie fibres, 2 to 5 parts of disproportionated rosin, 4 to 8 parts of sodium stearate, 4 to 8 parts of epoxidized soybean oil, 1 to 2 parts of zinc oxide, 3 to 5 parts of fluorinated polyamide, 2 to 6 parts of 1,3-bis(tert-butyl-peroxy-isopropyl)benzene, 3 to 4 parts of microcrystalline wax, and 2 to 3 parts of dicumyl peroxide. The high abrasion-resistant rubber sealing piece is of a special micro-pore structure, and has good compressive and resilient properties, good abrasion resistance, an excellent damping effect and an excellent sealing effect.

The invention discloses a flame retardant polyethylene sheath material used for refrigerator power line and capable of preventing termites. Nano-magnesium hydroxide with the surface modified with silane is used as flame retardant, hydrophobicity of magnesium hydrate can be improved to a certain extent, compatibility of magnesium hydrate in a polymer is improved, material mechanics and flame retardance are improved, the problems that red phosphorus is prone to moisture absorption and poor in safety are solved by modifying red phosphorus in a capsulation mode, capisulazed modified red phosphorus is heated to form phosphoric acid and metaphosphoric acid, then a powerful dehydrating agent polymetaphosphate is formed, decomposition of magnesium hydrate is accelerated, and the synergistic flame retardant effect is achieved. The surface of inorganic filler zeolite powder is modified chemically, compatibility of zeolite powder in the polymer is improved, and mechanical strength and abrasion resistance of the product are improved; by means of compatibility of other effective auxiliaries like oleum menthae, the manufactured polyethylene sheath material has a pungent smell of mint and can prevent termite gnawing when used a power line sheath material, and the service life is greatly prolonged.

The invention discloses a flame-retardant polyethylene sheathing compound for acid-resistant anticorrosive refrigerator power lines. After nano-magnesium hydroxide surface is silicane-modified, the silicane-modified nano-magnesium hydroxide is used as a fire retardant. Then, hydrophobicity of magnesium hydroxide is improved to some extent, compatibility of magnesium hydroxide in a polymer is enhanced, and mechanics of materials and flame retardance are raised. By encapsulation modification of red phosphorus, easy moisture absorption and poor safety of red phosphorus are improved. Encapsulation modified red phosphorus is heated to form phosphoric acid and metaphosphoric acid, and a dehydrating agent polymetaphosphate is furthermore formed. Then, decomposition of magnesium hydroxide is accelerated, and a synergistic flame retardant effect is achieved. By surface chemical modification of inorganic filler bagasse, compatibility of the inorganic filler bagasse in a polymer is raised, and mechanical strength and wear resistance of the product are improved. With compatibility of other effective auxiliary agents, the prepared polyethylene sheathing compound has characteristics of acid resistance, corrosion resistance, aging resistance and anti-tarnishing property.

The invention discloses a fluororubber seal gasket used for engines. The fluororubber seal gasket comprises the following raw materials in parts by weight: 20-50 parts of binary fluororubber, 15-35 parts of modified fluororubber, 1-5 parts of amide grafted ethylene-vinyl acetate copolymer, 0.5-1.5 parts of dicumyl peroxide, 1-4 parts of benzothiazole disulfide, 1-1.8 parts of dibutyltin dilaurate, 0.5-1.5 parts of zinc oxide, 0.5-2.5 parts of fluorinated polyamide, 1-2 parts of nano sepiolite, 1.2-1.9 parts of (hexafluoroisopropylidene)diphenol, 1-2 parts of polymetaphosphate, 1-2 parts of chelating titanate coupling agent, 20-50 parts of bentonite, 8-15 parts of barium sulfate, 20-40 parts of lignin, 2-10 parts of calcium titanate, 2-6 parts of cyclodextrin, 1-3 parts of sodium stearate, 1-3 parts of palm wax and 1-3 parts of fatty alcohol. The product has good toughness and excellent high temperature and wear resistance.

The invention discloses a high-strength inorganic hydroxide flame-retardant polyethylene sheath martial for a refrigerator power line. Nano-magnesium hydroxide is subjected to silane surface modification and then serves as a flame retardant, so that the hydrophobicity of magnesium hydroxide is relieved to some extent, the compatibility of magnesium hydroxide in a polymer is improved, and the effects of improving the mechanical performance and fire retardance of the material are achieved; red phosphorus is subjected to encapsulation modification, so that the problem that red phosphorus is likely to absorb moisture and poor in safety is relieved; encapsulation-modified red phosphorus forms phosphoric acid or metaphosphoric acid when heated and then forms strong dehydrant polymetaphosphate, so that decomposition of magnesium hydroxide is accelerated, and synergistic flame retardation is achieved. Besides, inorganic filler bull bone powder is subjected to chemical surface modification, so that the compatibility of inorganic filler bull bone powder in a polymer is improved, and the mechanical strength and abrasion resistance of the product are improved; through compatibility of the material and other effective auxiliaries such as alkali-free glass fibers, the obtained polyethylene sheath material is high in strength; a brominated flame retardant is replaced with inorganic hydroxide (a zero-halogen flame retardant), so that the polyethylene sheath material meets the requirements for environmental friendliness and zero halogen.

The invention discloses an anti-flaming polyethylene material for an impact-resisting wear-resisting geogrid. After the surface of nano-magnesium hydroxide is modified by silane, nano-magnesium hydroxide is used as a flame retardant, the hydrophobicity of magnesium hydrate is improved to a certain degree, the compatibility of magnesium hydrate in a polymer is improved, the effect of improving material mechanics and flame retardance is achieved, the problems that red phosphorus is likely to absorb moisture and poor in safety are relieved by carrying out encapsulation modification on red phosphorus, the red phosphorus subjected to encapsulation modification is heated to form phosphoric acid and metaphosphoric acid, then, the strong dehydrating agent polymetaphosphate is formed, decomposition of magnesium hydrate is accelerated, and a synergistic flame retardant effect is achieved. The surface of inorganic filler sepiolite powder is chemically modified, the compatibility of inorganic filler sepiolite powder in the polymer is improved, the mechanical strength and wear resistance of the product are improved, other effective additives are also adopted in a compatible mode, and the obtained polyethylene material has the characteristics of being good in flame retardance, good in machinable property, low in cost and simple in processing process, and has the advantages of being good in anti-impact toughness, resistant to high temperature and the like when applied to geogrid materials.

The invention discloses a flame-retardant polyethylene sheath material for a high-toughness refrigerator power line. The flame-retardant polyethylene sheath material has the advantages that silane modification is performed on the surface of nano magnesium hydroxide, the modified nano magnesium hydroxide is used as the flame retardant, and accordingly the hydrophobicity of the magnesium hydroxide is improved to a certain degree, the compatibility of the magnesium hydroxide in polymer is increased, and the mechanical performance and flame retardance of the material are improved; the encapsulation modification of red phosphorus improves the problem that the red phosphorus absorbs moisture and is poor in safety, the encapsulation modified red phosphorus forms phosphoric acid and metaphosphoric acid when being heated, then a strong dehydrating agent polymetaphosphate is formed, the decomposition of the magnesium hydroxide is accelerated, and a synergistic flame retardant effect is achieved; chemical modification is performed on the surface of inorganic filler oyster shell powder, the compatibility of the oyster shell powder in polymer is increased, the mechanical strength and toughness of the material are improved, and the polyethylene sheath material prepared by the raw materials coordinated with other effective auxiliaries is high in tensile strength and bending strength and promising in application prospect.

The invention relates to flame retardant bio-based polyester and a preparation method thereof, and belongs to the technical field of flame retardant materials. The flame retardant bio-based polyesteris prepared from the following components in parts by mass: 100 parts of polybutylene succinate, 10 to 15 parts of ammonium polyphosphate and 0.5 to 2 parts of carbon nanotube flame retardant, whereinthe polybutylene succinate is used as a matrix material and can be completely biodegraded; the ammonium polyphosphate is an acid source and an air source and is heated and decomposed to generate polymetaphosphate; meanwhile, the ammonium polyphosphate can generate inert gas (ammonia) which provides the air source for expanding a carbon layer; the expanded carbon layer can block a combustion-supporting substance (oxygen) to a certain extent, and thereby a flame-retardant effect is achieved; the carbon nanotube flame retardant is regarded as the acid source, the carbon source and the air source, and has the effects of resisting molten droplets and inhibiting a candlewick effect. The flame retardant bio-based polyester has high flame retardant efficiency, is environment-friendly and is obtained by melt blending and granulating through a twin-screw extruder. The preparation process of the flame retardant bio-based polyester is simple and can adapt to large-scale industrialized production.