42results about How to "Adjustable curing speed" patented technology

The invention belongs to the field of chemical synthesis, and particularly relates to a polyurethane high polymer material for coal rock mass reinforcement and a preparation method of the polyurethane polymer material. The polyurethane polymer material consists of component A and component B, wherein the component A is composed of a polyalcohol, a solvent, a catalyst and a fire retardant and the component B is composed of polyaryl polymethylene polyisocyanate. The polyurethane polymer material and the preparation method, disclosed by the invention, have the advantages that: through formulation design, foaming is carried out at a normal temperature, the curing rate is adjustable, the strength of consolidation body is high, compressive strength is more than 55MPa, the coal rock support force can be obviously increased; the consolidation body has very good toughness and can bear subsequent mining influence; the raw liquid is low in viscosity and has good permeability in the coal rock mass; and the caking property of the consolidation body and the coal rock mass is good; the related raw materials in the invention are green, pollution-free and harmless to human body, contain no volatile solvent and generate no any toxic gas, therefore, the use and environmental requirements for the coal rock mass reinforcement are completely satisfied; and the material is pressed and filled by using a double liquid grouting pump, therefore, the pumpability is good and the use is convenient.

The invention discloses an MDI-base polyurethane electronic pouring sealant as well as a preparation method and an application method thereof. The electronic pouring sealant comprises two components of A and B, wherein the component A is prepared from 50-60 parts of isocyanate, 15-20 parts of low-polymer polyalcohol and 9-30 parts of reaction type liquid flame retardant according to parts by weight; the component B is prepared from low-polymer polyalcohol, a crosslinking chain extender, a catalyst, a filler, a defoamer and an anti-oxygen according to certain proportion. The component A and the component B are mixed and cured according to certain proportion to prepare the pouring sealant. The MDI-base polyurethane electronic pouring sealant is prepared with a half-pre-polymerization method, the toxicity caused by volatilization of NCO is avoided, and synergistic flame retarding of the halogen-free reaction type liquid flame retardant and the filler avoids the influences of an addition type liquid flame retardant on the stability and performance of the polyurethane pouring sealant. A prepared polyurethane elastomer is suitable for pouring and sealing of small and medium electronic elements.

The invention discloses a preparation method for a polyurethane adhesive for binding high-grade books and belongs to the field of polyurethane adhesive compounding. The steps are as follows: (1) prepolymerization reaction: using hydroxy monomers and isocyanate monomers as main raw materials, and compounding to get prepolymers blocked with OH and NCO respectively; and (2) cross-linking reaction: mixing the two kinds of prepolymers by a certain proportion, and curing to obtain a transparent or semitransparent, flexible and properly hard coating. The invention adopts the two-step compounding method of prepolymerization and cross-linking to compound out a solvent-free double-component polyurethane adhesive; the production process is simple and clean and conforms to the requirement of environmental protection; and the viscosity and the molecular weight of Components A and B can be adjusted through prepolymerization so as to increase bonding strength; the adhesive can be cured in the cross-linking process so as to further improve the bonding strength. (3) The components A and B are liquid at normal temperature, and the viscosity and the curing speed are adjustable; the curing reaction is conducted at room temperature, the operation is convenient, the energy consumption is low, and product storage is stable.

The invention belongs to the field of chemical synthesis and in particular relates to a high-flame-retardance low-temperature bicomponent filling material for coal mines and a preparation method thereof. The filling material comprises a component A and a component B, wherein when the filling material is used, the component A and the component B are mixed according to the volume ratio of 1:(1.0-1.5) and are foamed; the component A is a composition with a silicate aqueous solution as the main body; and the component B is a composition with polyisocyanate as the main body. The filling material and the preparation method have the beneficial effects that the filling material is convenient to transport and has low viscosity, fluidity and storage stability; the raw materials are free from pollution and corrosion and the filling material does not contain irritating volatile solvents; the filling material has high foaming ratio and has low internal temperature during foaming; a foaming body has good flame retardance and certain toughness; the preparation method is simple and practicable, has low requirements on production and construction personnel, is short in production cycle, is free from equipment corrosion, is free from three wastes in the whole process and does not affect the environment.

The invention relates to a foamable phenolic resin strengthening and filling material for coal mine. In the foamable phenolic resin strengthening and filling material for coal mines, a component A is one of inorganic acid and organic acid or a mixture of inorganic acid and organic acid; and a component B is prepared by mixing 90 to 100 weight parts of urea modified phenolic resin with solid content of 65 to 90 weight percent, 6 to 10 weight parts of composite fire retardant, 0 to 15 weight parts of foaming agent, 1 to 5 weight parts of stabilizing agent, 1 to 15 weight parts of cosolvent, 2 to 16 weight parts of antistatic agent and 10 to 30 weight parts of plasticizer, stirring at the temperature of between 30 and 50 DEG C and reacting for 0.5 to 2 hours. When the foamable phenolic resin strengthening and filling material is used, the component A and the component B are mixed and injected into a coal (rock) layer according to the weight ratio of (1-2) : 1 and permeated into small cracks to expand and generate curing reaction for strengthening and sealing the region. According to the foamable phenolic resin strengthening and filling material for coal mines, the compressive strength is more than 40 MPa; the bonding strength is more than or equal to 3.0 MPa; and the foaming coefficient is less than or equal to two times. The foamable phenolic resin strengthening and filling material for coal mines can meet the requirement of coal mine on safety production and can be applied to the industries such as hydroelectric powder, buildings, mining, traffic and the like.

The invention belongs to the field of chemical synthesis, particularly relates to a mineral polyurethane spraying material and a preparation method thereof and more particularly relates to a double-component (A and B) polyurethane material and a preparation method thereof. The material is mainly used for rapidly spraying and sealing underneath mine; and through the selection of polyol, auxiliaries and isocyanate, the spraying material has good adhesion on a rock coal body; and after adhesion is carried out, the material has good anti-shearing property and toughness and resists impact. According to the invention, the viscosity of the material is reduced so that the material can well permeate into a coal bed or a fine crack of a rock stratum, and simultaneously, the related raw materials are low in smell, do not contain volatile solvent and do not generate any toxic gases, thereby completely meeting the use and environment-friendly requirements of a coal mine reinforcement material.

The invention relates to a solvent-free unfoamed polyurethane structured adhesive which contains a component A and a component B, wherein the mass ratio of the component A to the component B is 4:1; the component A contains the following raw materials in parts by mass: 30-45 parts of polyol, 50-47 parts of packing, 8-6 parts of a water removing agent, 4-2 parts of phthalic acid bi(2-ethylhexyl) ester, 3-0 parts of xylene formaldehyde resin, 4-0 parts of lyophobic gaseous silicon and 1-0 parts of an amino curing agent; and the component B contains the following raw material in part by mass: 100 parts of polymethylene polyphenyl isocyanate. The solvent-free unfoamed polyurethane structured adhesive provided by the invention is small in moisture influence, and is barely affected by ambient humidity, a foaming phenomenon in the gluing curing process can be avoided, and later reliability can be greatly improved.

The invention aims at providing a polyurethane reinforced material for inorganic modified ores and a preparation method thereof. The material is prepared by polymerizing components A and B. The component A is prepared from the following substances in percentage by mass: 31-57% of polyether polyol, 10-32% of polyester polyol, 1.0-14% of an inorganic modifier A, 1.0-11% of an inorganic modifier B, 0-1.8% of a foam stabilizer, 1.2-2.0% of a solubilizer, 0-35% of a foaming agent, 0.4-2.6% of a catalyst and 10-30% of a flame retardant; the component B is prepared from the following substances in percentage by mass: 50-75% of polymethylene polyphenyl polyisocyanate, 10-20% of diphenyl-methane-diisocyanate and 10-30% of a compound modifier. By adding the inorganic modifiers and optimizing the formula, the flame retardance of a conventional polyurethane material is improved, the reaction temperature of the material used is greatly reduced, and the potential safety hazard of the material in the using process is eliminated.

The invention relates to the powdery coating field and discloses a preparation method of a polyester resin master batch for regulating and controlling solidification speed of a powdery coating, and application of the polyester resin master batch to powdery coating. The method provided by the invention employs alcohol and acid in a molar ratio of 1.02-1.2 / 1 to prepare the linear polyester resin master batch; and an added curing accelerator accounts for 0.2-8 wt%. The polyester resin master batch prepared according to the method has an acid value of 30-50 mg KOH / g and high glass-transition temperature; and the curing accelerator quaternary phosphonium salt and (or) quaternary ammonium salt in the weight proportion of 0.2-8% is added, so as to prepare the polyester resin master batch for regulating and controlling solidification speed of the powdery coating. The method provided by the invention can effectively shorten solidification time or reduce solidification temperature of the powdery coating, thereby reducing energy consumption and expanding scope of application of the powdery coating.

The invention relates to a sealant and particularly relates to an environment-friendly organosilicone-modified polyether sealant and a preparation method thereof. The sealant is prepared from the following raw materials: difunctional polyether polyol, allyl polyether, polyisocyanate, a catalyst and organosiloxane. The preparation method of the sealant comprises the following steps: (1) firstly adding the difunctional polyether polyol and the polyisocyanate into a reactor, increasing the temperature to 80-90 DEG C, reacting and enabling mass fraction of NCO to reach 0.8-1.05%; (2) adding the allyl polyether, keeping the temperature and reacting and enabling the mass fraction of NCO to be 0; and (3) adding part of the catalyst and part of the organosiloxane, keeping the temperature and reacting to obtain an organosilicone-modified polyether sealant prepolymer, and then adding the rest of the catalyst to prepare the environment-friendly organosilicone-modified polyether sealant. The preparation method is simple and is easy to operate; the prepared sealant is high in bonding strength, excellent in sealing effect, excellent in ageing resistance, adjustable in curing speed and free of VOC (volatile organic compound), and is environmentally friendly and odorless.

The invention provides concrete thin-layer repairing polymer mortar and a preparation method thereof and relates to the field of mortar. The concrete thin-layer repairing polymer mortar is prepared from the following raw materials in weight ratio: two-component slow reaction type polyurea waterproof coating and a sand material, wherein the weight ratio of the two-component slow reaction type polyurea waterproof coating to the sand material is 1:(1-3). By utilizing the concrete thin-layer repairing polymer mortar, the problem that polymer mortar in the prior art cannot well repair a concrete building component can be solved, and the concrete thin-layer repairing polymer mortar has the advantages of good bonding performance, corrosion resistance and scour and wear resistance.

The invention relates to a foaming reinforcing filling material for a coal mine. The foaming reinforcing filling material is prepared by mixing the following raw materials in percentage by weight: 50-60% of a quick cementing material, 35-45% of an admixture, 0.1-0.25% of a concrete admixture, 0.3-1% of a stearate foam stabilizer, 1-5% of an inorganic foaming agent and 0.5-1% of a foaming activator. After water is added into the filling material, the filling material is used for goaf backfilling and underground caving goaf filling, normal-temperature foaming and curing of the filling material can be achieved, a cured body is high in strength and has certain bonding strength, and the filling material is used for coal mine safety production and goaf treatment and can provide guarantee for mine safety and efficient production.

The invention discloses hydraulic structure disjoint filling silicone adhesive, which is prepared from a component A and a component B according to a weight proportion, wherein the component A comprises 100 portions of alpha, omega-dihydroxydimethylpolysiloxane and 15 to 45 portions of calcium carbonate filler; and the component B comprises 3 to 10 portions of calcium carbonate filler, 6 to 15 portions of methyl vinyl disilane, and 3 to 10 portions of linear amino polysiloxane cross linker. After stirring and mixing according to the weight proportion, the components are separately sealed and stored; and during use, the component A and the component B are mixed according to the weight proportion and vulcanized at room temperature to form the hydraulic structure disjoint filling silicone adhesive. The hydraulic structure disjoint filling silicone adhesive has the characteristics of room temperature vulcanization, double components, self leveling, adjustable curing speed, low modulus, high elasticity, high durability, free from pollution, free from erosion and the like, belongs to an environment-friendly material, and is mainly used for pouring, filling, sealing and repairing hydraulic structure disjoints of water turbine volutes, water delivery steel pipes and the like.

The invention belongs to the field of chemical synthesis, specifically relates to a modified urea-formaldehyde resin reinforced material used for coal mine and a preparation method thereof, and the material is applicable to fragmented coal body reinforcing during coal mine excavation. The modified urea-formaldehyde resin reinforced material is characterized by being composed of a composition A and a composition B, wherein the composition A is modified urea-formaldehyde resin and the composition B is a modified urea-formaldehyde resin curing agent composition. The characteristics comprise that: (1) by designing the formula of the material, the reaction is performed at normal temperature, the curing speed is adjustable, the consolidation body is high in strength and good in toughness, has the compression resistance of 30 mPa or more, and is capable of substantially improving the bracing force of loose coal; (2) the internal reaction temperature of the material is relatively low and is at 60 DEG C or less; (3) the raw material solution is low in viscosity, good in permeability in coal rocks, and the caking property between the consolidation body and the coal body is good; and (4) the material employs a special pneumatic double-liquid or three-liquid grouting pump for pressure grouting, the operation is simple and the usage is convenient.

The invention discloses a new acrylic ester adhesive agent, which comprises the following two components A and B in the weight proportion of A of 90-120 shears and of B of 2-40 shears, wherein, the said component A is made of the following raw materials in weight proportion of methyl methacrylate of 80-120 shears, acrylonitrile-butadiene-styrene of 20-35 shears and modified arylamine of 1-4 shears, the said component B is made of the following raw materials in weight proportion of benzoyl peroxide of 5-15 shears, methacrylic acid of 5-15 shears and talcum powder of 10-30 shears. The acrylic ester adhesive agent in the invention cures mildly and stably in room temperature and disappears the phenomenons vigorous heat release or imploding detonation when the curing time in room temperature is controlled in 10-90 min and the one-time dosage is lass than 10 g. The shelf life of the said acrylic ester adhesive agent in room temperature can reach more than half a year.

The invention discloses gypsum powder, a preparation method of the gypsum powder and application of the gypsum powder in sculptures and unfired pottery clay. The gypsum powder comprises the followingcomponents in parts by weight: 70-80 parts of gypsum powder, 15-20 parts of a filler, 0.2-0.5 part of a dispersing agent, 2-5 parts of dispersible latex powder, 5-10 parts of a retarder, 5-10 parts ofmodified starch, 8-12 parts of polyvinyl alcohol (PVA) powder, 1-10 parts of cellulose ether, and 1-2 parts of short glass fibers or 0.1-0.2 part of short chemical fibers. The gypsum powder providedby the invention is slow and adjustable in curing speed, and can be cured in 5-15 days; the cured gypsum powder still has high strength, can be used for shaping, and has good weather resistance and good compatibility with other materials; and the gypsum powder is used for sculptures and unfired clay, replaces sculpture clay and argil, is directly cured, does not need mold turnover, casting and high-temperature firing, protects the environment, reduces sculpture shaping procedures, greatly reduces process steps, shortens a sculpturing period and reduces sculpturing cost.