8 results about "Grease" patented technology

The invention discloses a simple and convenient synthesis method and application of waste grease based polyhydric alcohol. The synthesis method comprises the following steps: performing simple pretreatment such as filtration, dehydration and decoloration on waste grease, performing heating and stirring reaction with alkamine compounds, and performing amidation with free fatty acid in the waste grease and performing transesterification reaction with glyceride under heating conditions by using relatively high reaction activity of amino groups to form corresponding biological oil based polyhydric alcohol. The method disclosed by the invention is capable of achieving the purpose of turning waste into treasure by adopting the waste grease as a raw material, and an obtained polyhydric alcohol product has the characteristics of good biodegradability, simple and convenient preparation process, small emission of three industrial wastes, adjustable product structure and hydroxyl value, wide application range and low environmental influence level.

The invention relates to a grease-based epoxy polymer and an epoxy copolymer, and preparation methods thereof. The grease-based epoxy polymer and the epoxy copolymer are prepared from a grease-based monomer based on vegetable oil or fatty acid. The grease-based monomer based on vegetable oil or fatty acid is polymerized or is copolymerized with other monomers to obtain the grease-based polymer orcopolymer, and unsaturated double bonds of the grease-based polymer or copolymer are epoxidized by peroxide to obtain the grease-based epoxy polymer. The grease-based epoxy polymer with different properties can be prepared by controlling the number of the unsaturated double bonds, the polymerization degree of the polymer, the epoxidation degree of the polymer and the proportions of two monomers inthe copolymer in the preparation method. The grease-based epoxy polymer can replace or partially replace a fossil raw material to prepare thermosetting materials and high-performance composite materials.

The invention relates to the technical field of high polymer materials, in particular to an oil-resistant ABS modified material which comprises an ABS base material, an additive and an oil-resistant mixed base material, wherein the ABS base material comprises an ABS regenerated material and a PBT regenerated material; the additives comprise a compatilizer, a toughening agent and a grease; the oil-resistant mixed base material comprises MBS resin and a nano filler; wherein the dosages of the materials are shown in the specification: 5-8 parts by weight of the ABS regenerated material; 1-4 partsby weight of the PBT regenerated material; 2-4 parts by weight of the compatilizer, 2-3 parts by weight of the toughening agent; 1-2 parts by weight of MBS resin; 1-2 parts by weight of the nano filler; PBT and ABS are blended, so that the oil resistance of ABS can be improved; meanwhile, the selected PBT is more beneficial to the preparation of ABS/PBT alloy; the compatilizer is added into the ABS/PBT alloy, various properties of the alloy can be effectively improved, meanwhile, the alloy has excellent oil resistance, the flexibilizer is added into the ABS/PBT alloy, the low-temperature impact of the alloy can be more effectively improved, and the notch impact strength of the alloy reaches the highest due to addition of MBS.

The invention provides a water-in-oil type high internal phase emulsion for carrying bitter substances and a preparation method thereof, and relates to the field of embedding and carrying of nutrient substances. The raw materials of the water-in-oil type high internal phase emulsion carrying the bitter substances comprise a water phase and an oil phase, and the water phase comprises the bitter substances and a solvent; the oil phase comprises liquid grease, solid grease and polyglycerol ricinoleate. A bitter substance solution formed by a bitter substance and a solvent is used as an internal water phase, and a lipid network structure constructed in a mode of combining liquid grease and solid grease is used as an external oil phase, so that a high-internal-phase emulsion with good stability is favorably formed, the encapsulation efficiency of the bitter substance and the content of the bitter substance in the emulsion are improved, and the bad flavor of the bitter substance is covered; the gastrointestinal tract digestion stability of bitter substances is improved.

The invention relates to a blowout prevention technology of a cable oil pipe outside a sealing pipe for construction of an oil-water well and an oil-gas well, in particular to a blowout prevention device for sealing the cable oil pipe outside, a static sealing blowout prevention system for operation under pressure and an operation method for construction under pressure. The technical problems that in the prior art, a cable and an oil pipe outside a pipe cannot be effectively sealed at the same time, and the blowout prevention sealing requirement of under-pressure airtight lifting and lowering of the cable pipe column outside the pipe cannot be met are solved. The device comprises a first-stage sealing assembly, a grease injection connecting disc and a second-stage sealing assembly. Each of the first-stage sealing assembly and the second-stage sealing assembly comprises a shell, an annular piston, a reducing pressure plate, a rubber sleeve, a hook claw, a pin shaft, a return spring and an annular U-opening pressure plate; the shell is fixedly connected with the grease injection connecting disc, the annular piston axially pushes the variable-diameter pressing disc to extrude the rubber sleeve, and the rubber sleeve deforms to tightly hold the oil pipe and the cable and seals the oil pipe and the cable at the same time. The invention further provides a blowout prevention system formed by combining the blowout prevention devices and an under-pressure operation construction blowout prevention method based on the blowout prevention system.

The invention provides a molded self-lubricating joint bearing and a using method thereof, and belongs to the technical field of bearings. The molded self-lubricating joint bearing comprises a bearing main body, an outer spherical surface, two oil inlet holes, a connecting block and a reaction assembly. The interior of the bearing main body is a spherical surface, and an inner spherical surface is fixedly connected in the bearing main body. The outer spherical surface is connected to the inner wall of the inner spherical surface in a sliding manner. The two oil inlet holes are formed in the bearing main body. The connecting block is fixedly connected to the upper end of the bearing main body, and the upper end of the connecting block is fixedly connected with a top plate. The upper end of the top plate is fixedly connected with an oil tank, and the upper end of the oil tank is fixedly connected with multiple fixing blocks. The reaction assembly comprises a reaction kettle, a guide pipe, an automatic valve, a sulfuric acid bin and a plurality of air holes. Internal lubricating grease cannot be reduced due to long-time friction between the inner spherical surface and the outer spherical surface of the joint bearing, abrasion between the inner spherical surface and the outer spherical surface of the joint bearing is effectively reduced, and the joint bearing is suitable for being used in various devices for a long time.