284 results about "Blowing agent" patented technology

An injection molding system is provided. A mixing unit is configured to mix a flowable polymeric material with a blowing agent to form a mixture. A fluid supply unit is configured to provide the blowing agent to the mixing unit. The fluid supply unit includes an injection outlet coupled to the mixing unit, a compressor configured to generate the blowing agent, an injection valve disposed between the injection outlet and the compressor and configured to receive the blowing agent from the compressor through a first passage, and a cleaning mechanism configured to clean the injection valve. The cleaning mechanism includes a control valve coupled to the compressor through a second passage and coupled to the injection valve through a third passage connected to the first passage, and an actuating device configured to actuate the control valve. The blowing agent is flowable to the injection valve through the control valve.

The present invention provides a two-component composition that suppresses dripping during spray application, has high thermal insulation properties, excellent smoothness, and high interlayer adhesion strength for spray-applied polyurethane foam roofing. [Solution] A two-component composition for spray-applied polyurethane foam for roofs, comprising: liquid A containing a polyol, a catalyst, and a blowing agent; and liquid B containing an isocyanate compound, wherein the catalyst includes a foaming catalyst and a resinification catalyst (excluding a metal catalyst), and the blowing agent includes a hydrochlorofluoroolefin and does not include the metal catalyst which is the resinification catalyst, or a trimerizing catalyst.

The invention discloses a modified polymer cement-based normal-temperature foaming fireproof coating and a preparation method thereof, and relates to the technical field of fireproof coatings. The modified polymer cement-based normal-temperature foaming fireproof coating comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 15 to 20 parts of cement, 10 to 12 parts of calcium carbonate, 0.3 to 0.9 part of nano titanium dioxide, 30 to 35 parts of polyurethane emulsion, 1 to 2 parts of cross-linking agent, 8 to 12 parts of flame retardant, 1 to 3 parts of foaming agent, 0.5 to 1.5 parts of dispersing agent and 10 to 20 parts of deionized water; the component B comprises the following raw materials in parts by weight: 20-25 parts of a curing agent, 0.1-0.5 part of an organic zinc catalyst and 0.5-1.2 parts of a foam stabilizer; the prepared modified polymer cement-based normal-temperature foaming fireproof coating has excellent fireproof performance, bonding strength and compressive strength.

The application relates to a high-damping and low-creep composite foaming material for gymnastics mats and a preparation process thereof, and relates to the field of polymer materials and preparation thereof. The preparation raw materials comprise the following components in mass fractions: ethylene-octene copolymer 60-70 parts, thermoplastic vulcanized rubber 15-25 parts, nano reinforcing filler 4-8 parts, maleic anhydride grafted ethylene-octene copolymer 5-9 parts, composite foaming agent 2-4 parts, crosslinking agent 1-2 parts, and antioxidant 1-1.5 parts. The preparation process comprises the following steps: melting and blending ethylene-octene copolymer, thermoplastic vulcanized rubber and maleic anhydride grafted ethylene-octene copolymer, adding nano reinforcing filler, mixing and kneading, then adding crosslinking agent, composite foaming agent and antioxidant, mixing and kneading, discharging and obtaining a sheet, crosslinking and foaming the sheet, releasing pressure after pressure maintaining, cooling and opening the mold, and obtaining the high-damping and low-creep composite foaming material for gymnastics mats. The application has the effects of improving the material collapse resistance, buffering performance and comfort performance.

A pellet includes a starch in an amount of approximately 50 to 98 weight percent, a plasticizer in an amount of approximately 2 to 25 weight percent, water in an amount of approximately 1 to 40 weight percent, and a blowing agent in an amount approximately 1 to 25 weight percent. The pellet may have a density of approximately 20 to 65 pounds per cubic foot. The blowing agent may include sodium bicarbonate and / or ammonium bicarbonate.

Disclosed herein is a method of reprocessing a thermoset polyurethane foam. The method includes mixing polyurethane foam particles loaded with a bond exchange catalyst with a blowing agent and compounding the mixture. The method includes machining a polyurethane foam into particles; loading the particles with a bond exchange catalyst, thereby preparing loaded particles; mixing the loaded particles with a blowing agent; compounding the mixture of the loaded particles and the blowing agent, thereby preparing a compound; and extruding the compound.

The present invention relates to tannin-based heat-expandable microspheres, and also to a process for their preparation. The heat-expandable microspheres comprise a thermoplastic shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the thermoplastic shell comprises tannin.

The invention relates to the field of foaming materials, in particular to a fireproof polyurethane foaming material and a preparation method thereof.The preparation method comprises the following steps that S1, polyisocyanate and an inorganic flame retardant are taken and added into one mixing box of a preparation device to be premixed, and a mixture A is obtained; s2, polyhydric alcohol and a foaming agent are taken and added into another mixing box of the preparation device to be premixed, and a mixture B is obtained; s3, the mixture A and the mixture B are fed into an extrusion box to be mixed and extruded into a forming cavity of a mold to be subjected to foaming forming; and S4, the multiple molds are driven to sequentially and circularly move, materials are sequentially extruded into the forming cavities of the multiple molds for foaming forming, meanwhile, the foaming forming materials in the forming cavities of the molds are sequentially and automatically discharged, and continuous preparation of the foaming materials is formed. The foam material is continuously prepared through the mold, and the preparation efficiency is improved.

Intumescent composition comprising an acid donor (A), a carbon donor (B), a binder polymer (C) and a blowing agent (D). The acid donor (A) is selected from the group consisting of ammonium polyphosphate, ammonium dihydrogen phosphate, ethylenediamine phosphate, ammonium pentaborate, guanylurea phosphate, diguanidine phosphate and mixtures thereof. The carbon donor (B) is selected from the group consisting of glucose, arabinose and other monosaccharides, lactose, maltose and other disaccharides, starch, cellulose, dextrin and other polysaccharides, sorbitol, erythritol, pentaerythritol, dipentaerythritol, mannitol and other polyhydric alcohols and mixtures thereof. The blowing agent is provided in the form of microsphere particles comprising a thermoplastic polymer shell encapsulating a propellant, which microsphere particles are expandable microspheres.

A method for producing polyolefin-based resin expanded beads includes dispersing polyolefin-based resin particles in an aqueous medium, adding a physical blowing agent into a sealed container, and expanding the resin particles by impregnating the resin particles with the physical blowing agent in the sealed container, then releasing the resin particles from the sealed container together with the aqueous medium to produce expanded beads having an apparent density of 10 to 80 kg / m3. The physical blowing agent includes a hydrofluoroolefin. An addition amount of the hydrofluoroolefin is 10 to 30 parts by mass with respect to 100 parts by mass of the resin particles.

The application relates to the technical field of cable material manufacturing, and discloses a light-weight flexible wear-resistant electrical equipment connecting cable, a sheath of the connecting cable being made of raw materials including the following: polyester type thermoplastic polyurethane elastomer, styrene-acrylonitrile copolymer, maleic anhydride grafted polyolefin elastomer, blocked isophorone diisocyanate, wear-resistant premixed solution containing a catalyst, slow-release foaming master batch and functional additives; wherein the wear-resistant premixed solution containing the catalyst contains hydroxyl-terminated polydimethylsiloxane and a bismuth octoate catalyst, the slow-release foaming master batch contains modified azodicarbonamide foaming agent and carrier resin, and the functional additives contain antioxidants and carbodiimide hydrolysis stabilizers. According to the application, the hydroxyl-terminated polydimethylsiloxane containing the catalyst and the blocked isocyanate are introduced into the polyurethane matrix in cooperation through a reaction extrusion process, the isocyanate groups are unblocked at high temperature, and the organic silicon chain segment is chemically bonded with the matrix resin.

The invention discloses a multifunctional polyurethane foam adhesive and preparation and application methods thereof, the multifunctional polyurethane foam adhesive comprises a main agent component A and a curing agent component B. The component A comprises, by mass, 35-90 parts of polyether polyol, 1-3 parts of a flexibilizer, 5-15 parts of triptolide powder, 1-5 parts of a foaming agent and 1-3 parts of a surfactant; the component B is prepared from 75 to 100 parts of polyisocyanate, 0.05 to 2 parts of a composite catalyst, 2 to 10 parts of a cross-linking agent, 9 to 20 parts of an organic flame retardant, 8 to 15 parts of an inorganic flame retardant and 1 to 10 parts of graphite powder; wherein the composite catalyst is obtained by compounding A-33 and DBTDL, and integration of multiple functions of flame retardance, insect prevention, rapid curing and the like is realized.

Composition for producing polyurethane, preferably PU foam, especially rigid PU foam, comprising a polyisocyanate component, a polyol component, optionally blowing agents, at least one solid filler, optionally at least one catalyst that catalyses the formation of a urethane or isocyanurate linkage, wherein the composition comprises at least one surfactant based on a quaternary ammonium compound.

Processes, foams, foamable compositions, and blowing agents related to thermoset polymer foam compositions comprising an active hydrogen-containing compound; and a blowing agent comprising HFO-1252zc and optionally HFC-152a.

This invention relates to the field of all-water foaming polymer materials, specifically to an all-water-blown rigid polyurethane foam reinforced with nano-titanium oxide, its preparation method, and its applications. It consists of component A and component B. Component A includes polyether polyol 1, polyether polyol 2, polyether polyol 3, a blowing agent, a silicone oil stabilizer, and an amine catalyst; component B is isocyanate. This invention uses an in-situ modified terephthalic acid nano-titanium oxide aqueous dispersion instead of pure water as the blowing agent, chemically anchoring the nano-titanium oxide to the polyurethane cross-linked network via terephthalic acid, forming rigid nano-nodes. This solves the problem of negative pressure shrinkage of the cells caused by CO2 escape in all-water foaming systems. This invention constructs a rigid skeleton synergistic system: a rigid reinforcement structure from the molecular to the network level formed by fluoroaniline polyether containing benzene rings, high-functionality sucrose polyether, and glycerol polyether, combined with chemically anchored nano-titanium oxide rigid nodes, improves the foam's compressive strength.

Disclosed herein are fluoroolefin compositions, methods of producing the same, methods and systems using the same, and systems containing the HFO-1234ze compositions. The inventive compositions are useful as refrigerants in air conditioning and refrigeration systems, and also as blowing agents.

The invention relates to the technical field of polymer foam materials, in particular to a rubber-based composite foam material for a middle layer of a shoe sole and a preparation method of the rubber-based composite foam material for the middle layer of the shoe sole. Adding a foaming agent, sulfur, an accelerant N-cyclohexyl-2-benzothiazole sulfenamide and tetrabenzylthiuram disulfide, and carrying out secondary internal mixing to obtain a uniformly mixed styrene butadiene rubber / natural rubber-based rubber compound; putting the rubber compound into an open mill, and discharging bubbles; and finally, carrying out high-temperature curing foaming on the rolled rubber compound by using a plate vulcanizer. The rubber-based composite foam material obtained by the invention has the characteristics of simple process, light weight, uniform foam holes, high elasticity and high tensile strength, and is suitable for middle-layer materials of soles.

This invention provides a method for manufacturing recyclable building corner pieces and panels from recycled thermoplastic polymer composite materials. The method uses at least 70% recycled polystyrene (rPS) as the base material, and adds appropriate amounts of compatible modified elastic plastics, foaming agents, and functional additives to form a mixed material. The mixed material is then heated and stirred using a screw extruder to become a thermoplastic polymer composite copolymer mixture. Finally, the thermoplastic polymer composite copolymer mixture is gradually cooled and shaped to room temperature using a cooling mold to produce integrally molded and recyclable building corner pieces and panels.

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

The invention belongs to the technical field of foamed cotton materials, and relates to a high-thermal-insulation flame-retardant composite foamed cotton material and a preparation method thereof. The high-thermal-insulation flame-retardant composite foamed cotton material comprises the following substances in parts by weight: 100 parts of a polyurethane foaming base material; 20-30 parts of a modified composite filler; 6-9 parts of a foaming agent; 0.5 to 0.8 part of a catalyst; 1.5 to 2.5 parts of a cross-linking agent; 0.2 to 0.4 part of a foaming regulator; the modified composite filler is a porous diatomite impregnated-in-situ precipitated nano magnesium hydroxide flame retardant. A composite system with a polyurethane foaming base material as a main body and matched with the modified composite filler, the foaming agent, the catalyst, the cross-linking agent and the foaming regulator is defined, and the modified composite filler is limited to be a porous diatomite impregnated-in-situ precipitated nano magnesium hydroxide flame retardant. Through specific component combination, the synergistic basis of heat preservation and flame retardant functions is achieved, the overall component matching is scientific and reasonable, a core foundation is laid for preparation of a high-performance composite foamed cotton material, and the technical problem that component function synergy of an existing material is insufficient is effectively solved.

An article, such as an article of footwear includes, a textile component. The textile component includes a yarn. The yarn includes a thermoplastic material and a blowing agent with an activation condition. Upon triggering the activation condition of the blowing agent, the blowing agent introduces a plurality of cavities, i.e. cells, into the thermoplastic material, creating a multicellular foam area of the textile.

A liner (1) for a container for holding a granulate which has a blowing agent. The liner (1) has at least one polyamide layer (4) which is arranged between two ethylene copolymer layers (2).

A method of manufacturing an injection molded article, the method comprising: providing a flowable melt composition comprising cellulose diacetate, a viscosity-reducing additive, and a chemical blowing agent; introducing the flowable melt composition into a mold cavity of an injection molding machine; molding the flowable melt composition in the mold cavity at a pressure P, a temperature T, and a cycle time C to form the injection molded article having a length L and a density D in a range of 0.9 to 1.6 g / cc, wherein the method exhibits at least one of: a reduced pressure P, a reduced temperature T, a shortened cycle time C, when compared to an injection molded article using a melt composition identical to the flowable melt composition of the present application but not containing the chemical blowing agent.

The present invention relates to a composition comprising an aqueous dispersion of: a) binder-coated opaque polymer particles; b) extender particles; c) starch; d) a blowing agent; and e) a rheology modifier. The composition of the present invention is useful as a coating in liquid applied sound damping applications.

The application relates to the field of polyurethane foaming materials, and particularly discloses a high-performance polyurethane elastomer for a high-rebound motor vehicle seat and a preparation method thereof, and the high-performance polyurethane elastomer for the high-rebound motor vehicle seat comprises the following components in parts by weight: polyether polyol 60-80 parts, a curing agent 40-60 parts, a foaming agent 1-2 parts, a catalyst 0.5-1 part, a chain extender 3-6 parts, a plasticizer 1-2 parts, a stabilizer 0.5-1 part, nano filler 2-6 parts, nano connecting material 1-4 parts and a flame retardant 1-2 parts; the preparation method comprises the following steps: uniformly mixing the polyether polyol, the nano connecting material, the nano filler and the flame retardant, then uniformly mixing and stirring the plasticizer, the chain extender and the stabilizer, finally uniformly mixing the foaming agent and the catalyst, defoaming, and obtaining a mixture; uniformly mixing the mixture and the curing agent, pouring into a mold, then performing a curing treatment, and obtaining a finished product; the finished product has the advantages of good rebound elasticity, good compression deformation resistance, good moisture and heat resistance and good tear resistance.

The invention provides a biomass ultralow-density sheet packaging material and a preparation method thereof, and relates to the technical field of preparation of environment-friendly packaging materials. The material is prepared by taking plant fibers as a framework, matching with a foaming agent, an environment-friendly binder, a waterproof reinforcing agent and a functional aid through an improved dry process of raw material pretreatment, mixed paving, low-temperature foaming shaping and post-treatment. The core lies in that a foaming-bonding cooperative regulation technology is adopted, a gradient pore structure is constructed, and the balance of high specific strength, good buffering performance and foldability is achieved within the ultra-low density range of 0.15-0.35 g / cm < 3 >; bio-based degradable raw materials are selected and matched with halogen-free environment-friendly auxiliaries, the product can be composted and recycled, the carbon footprint is reduced by 40% or above compared with a traditional packaging material, corrugated paper, EPS foam and other traditional materials can be replaced, and the product is suitable for packaging boxes, buffer pads, food trays and other scenes and has environment friendliness, functionality and economical efficiency.

An adhesive formulation having an adduct of an epoxy resin and an elastomer, a phenoxy epoxy hybrid resin supplied as a solution formed by dissolving a phenoxy resin in a liquid epoxy resin to form a pre-formed dissolution product, a core / shell polymer, and one or more additional epoxy resins. The adhesive formulation may include a curing agent, blowing agent, filler, accelerator, or a combination.

The invention provides a foaming agent composition, premixed polyether polyol, a polyurethane composition, polyurethane foam and refrigeration equipment. The foaming agent composition comprises a foaming agent and a foam stabilizer, the foaming agent comprises bio-based cyclopentane and a CO2-based foaming agent, and the foam stabilizer comprises a bio-based siloxane-polyether copolymer. The environment-friendly property of the polyurethane foam can be improved.