217 results about "Phenolformaldehyde foam" patented technology

The invention relates to a phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and a preparation method thereof. The preparation method comprises the following steps: synthesizing cardanol glycidol ether from cardanol and epoxy chloropropane under alkaline conditions, and hydrolyzing under acidic conditions to generate cardanol-base dibasic alcohol; by using the cardanol-base dibasic alcohol as the raw material, dropwisely adding oxydol to react under acidic conditions to obtain the epoxy cardanol-base dibasic alcohol, carrying out reaction on the epoxy cardanol-base dibasic alcohol and a phosphorus-containing flame retardant to obtain phosphorus-containing cardanol-base polylol; carrying out reaction on the phosphorus-containing cardanol-base polylol and isocyanate to obtain a phosphorus-containing cardanol-base polyurethane prepolymer; and mixing the phosphorus-containing cardanol-base polyurethane prepolymer with a phenolic resin, and sequentially adding a surfactant, a foaming agent and a curing agent, thereby obtaining the phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam thermal-insulation material. The mechanical properties of the phenolic foam thermal-insulation material are obviously enhanced. The flame-retardant element phosphorus is introduced into the polyurethane prepolymer, thereby solving the problem of degradation of foam flame retardancy due to the carbamate introduced into the phenolic foam.

The invention relates to the technical field of building material mortar technologies, in particular to waterproof adhesive mortar for external thermal insulation of an external wall. The waterproof adhesive mortar is prepared from the following raw materials in part by weight: 20 to 25 parts of high-alumina cement, 10 to 20 parts of Portland cement, 50 to 65 parts of sand, 2 to 8 parts of coarse whiting, 1 to 2.5 parts of re-dispersible emulsion powder, 0.1 to 0.3 part of cellulose ethers thickening agent, and 0.1 to 0.3 part of moisture repellent, wherein the Portland cement is 42.5-grade Portland cement, and the waterproof intensity of the adhesive mortar is not lower than that of the conventional adhesive mortar or is reduced slightly; the adhesive mortar is high in adhesive property and suitable for various external thermal insulation systems, and excellent in capacity of adhering cement concrete base-level wall surfaces, and thermal insulation materials such as phenolic foam, polyphenyl, extruded sheets and the like.

The invention discloses cardanol modified phenolic aldehyde foam and a preparation method of the cardanol modified phenolic aldehyde foam. The cardanol modified phenolic aldehyde foam is prepared by the following materials in parts by weight: 100 parts of a cardanol modified phenolic aldehyde resin, 4-7 parts of a surfactant, 6-10 parts of a foaming agent and 15-20 parts of a curing agent, wherein the cardanol modified phenolic aldehyde resin is a phenolic aldehyde resin obtained by performing a first step of reaction on cardanol and liquid formaldehyde under a basic catalyst condition, then, adding phenol and paraformaldehyde, and performing a second step of reaction under the basic catalyst condition, and at last, adding a hydroxymethylurea resin to react. According to the preparation method, on the basis of not affecting the heat conductivity coefficient and high fire resistance of the phenolic aldehyde foam, the density, water absorption and free formaldehyde of phenolic aldehyde foam plastic are reduced by the cardanol, the tenacity of phenolic foam is improved, and meanwhile, renewable plant resources are adequately used. The cardanol modified phenolic aldehyde foam can be used as a building heat-insulation, heat-preservation and fire-proof material, and is a product with good market prospect.

The invention relates to the technical field of foam thermal-insulation materials, particularly a low-density low-acidicity phenol formaldehyde foam board which is composed of the following components in parts by weight: 100 parts of phenol aldehyde resin, 1-10 parts of emulsifier, 1-10 parts of toughener, 7-12 parts of foaming agent, 3-10 parts of inorganic filler, 3-10 parts of flame retardant and 15-25 parts of organic acid curing agent. The organic acid curing agent is composed of more than one of p-toluenesulfonic acid, dimethyl benzenesulfonic acid, sulfocarbolic acid and benzenesulfonic acid. The high-proportion resin is combined with organic mixed acid into which an inorganic filler is added, and two surfaces are respectively coated with a glass fiber felt layer. The density of the prepared phenol formaldehyde foam board is 25-40 kg / m<3>, the pull strength is higher than 0.1 MPa, the close-pore ratio is higher than 90%, the heat conductivity coefficient is 0.023W / (m.k), and the pH value is higher than 4.5.

The invention discloses a fiber reinforced phenolic foam composite material. The fiber reinforced phenolic foam composite material is prepared from the following components in parts by weight: 10-100 parts of fiber felts, 100 parts of phenolic resin, 5-20 parts of a foaming agent, 1-6 parts of a modifier, 5-18 parts of a curing agent and 0-200 parts of a solvent. Interaction of a microsphere foaming agent, fiber felts and the modifier is adopted, so that the phenolic resin foam composite material obtained by the preparation method disclosed by the invention is not only relatively excellent in fireproof performance, but also controllable in hole diameter of foam holes; the obtained composite material is high in strength, not prone to drop powder and capable of being bent into various shapes. Domestic requirements such as fire resistance, water resistance and heat resistance can be completely satisfied, the material strength is greatly improved, and the application field of the fiber reinforced phenolic foam composite material is expanded.

The invention relates to the technical field of phenolic foam plates and in particular relates to a phenolic foam plate containing nanometer aerogel. The phenolic foam plate containing nanometer aerogel comprises the following raw materials: phenolic resin, an emulsifying agent, a toughening agent, a foaming agent, nanometer aerogel, a fire retardant and a curing agent according to a weight ratio of 100: (1-10): (1-10): (7-12): (2-15): (2-15): (15-25). The toughening agent is prepared by mixing polyvinyl pyrrolidone with ethylene glycol according to a weight ratio being 1: (1-5). A production method of the phenolic foam plate containing nanometer aerogel comprises the following steps: evenly mixing and stirring the raw materials and pouring the raw materials into a preheated die to foam and cure. By taking the nanometer aerogel as filler and adding the special toughening agent, the strength of the plate can be improved; a compression strength is increased from about 0.14 to be greater than 0.18; a pulling strength is increased from about 0.07 to be greater than 0.12; a heat conductivity coefficient of the plate is reduced to be less than 0.022; an oxygen index is increased from about 45 to be 55.

The invention belongs to the technical field of organic composite materials, and especially relates to a lignin modified phenolic resin, a foam thereof, a preparation method of the resin, and a preparation method of the foam. The preparation method of the lignin modified phenolic resin comprises the following steps: 1, mixing an acid catalyst with phenol and lignin, and reacting at 230-300DEG C under 2-5MPa to obtain a lignin phenolation product solution; and 2, adding formaldehyde, and reacting to obtain the lignin modified phenolic resin, wherein phenol can be added or not added to the lignin phenolation product solution obtained in step 1 before the addition of formaldehyde. The lignin modified phenolic resin synthesized through the method has a high curing activity, and has a shorter gelling time and a lower content of free formaldehyde than low temperature phenolated lignin modified phenolic resin. The phenolic foam prepared by using the lignin modified phenolic resin has the advantages of good toughness, high percentage of close area, and good thermal insulation performance.

A treatment fluid dispenser pad includes a phenolic foam core encased in a fluid impervious skin or sheath. The fluid impervious skin or sheath is sealed about the phenolic foam core. The pad is cut in one or more sections and soaked in formic acid fluid. Each section of pad is vertically hung in a bee space so as to downwardly dispose an exposed surface of the phenolic foam core to thereby evaporate acid at a uniform rate.

The invention discloses a lignin-based phenolic heat insulating material and a preparation method thereof. The preparation method comprises the following steps of: uniformly stirring expandable lignin basic phenolic resin with the conventional pH adjusting agent and a surfactant; adding a foaming agent and rapidly and uniformly stirring; adding a curing agent lastly; and uniformly stirring, and rapidly pouring into a specified enclosed container for foaming to the obtain lignin-based phenolic heat insulating material, wherein the used curing agent is a compound curing agent obtained by mixing toluenesulfonic acid and phosphoric acid in the mass ratio of 1.5:1. The foaming multiplying power of the lignin-based phenolic foam material is adjustable, the form hole fineness uniform density is 40-60 kg / m<3>, the compression strength is 0.07-0.45MPa, and the water absorbing rate is 7-15.5 percent.

The invention relates to a low water absorption and high flame retardant composite phenolic foam thermal insulation material and a production method thereof. The thermal insulation material is composed of phenolic resin foam and flame retardant expandable polystyrene foamed particles of different sizes. The flame retardant expandable polystyrene foamed particles of different sizes are uniformly dispersed in a phenolic resin foam matrix, the particles are mutually isolated, and the phenolic resin foam and the particles are closely combined together. The production method of the thermal insulation material includes: mixing A-stage resin, a surface active agent, a foaming agent, and a toughening agent evenly, adding a curing catalyst and conducting mixing again, and finally adding the flame retardant expandable polystyrene foamed particles of different sizes to undergo mixed foaming curing molding. The thermal insulation material provided in the invention has very low water absorption and good fireproof performance, as well as good mechanical strength.

The invention discloses easily degradable phenolic foam which is obtained through a mixed reaction and foaming by raw materials which comprise, by weight, 100 parts of biomass phenolic resin, 4-8 parts of surface active agents, 24-44 parts of curing agents and 10-15 parts of foaming agents. The biomass phenolic resin is obtained through the mixed reaction and foaming by raw materials which comprise, by weight, 100 parts of biomass phenol, 15-20 parts of alkali, 90-130 parts of aldehyde and 40-75 parts of water. The biomass phenol is obtained through the mixed reaction by raw materials which comprise, by weight, 100 parts of phenol, 3-4 parts of catalyst acid and 25-33 parts of agriculture and forestry wastes. Further disclosed is a preparation method of the easily degradable phenolic foam. According to the easily degradable phenolic foam and the preparation method thereof, the agriculture and forestry wastes are translated into a flow state in a complete component mode under a specified condition, and used for replacing of partial petroleum base chemical products to prepare high polymer materials with high additional value. On one hand, the wastes are used, the product has biodegradability, and environment pollution is eliminated. On the other hand, production cost of the product is reduced.

The invention discloses a paint preparation technology, which is characterized by comprising the technological steps of: (1) raw material selection, wherein by weight percent, polystyrene foam, phenolic foamed plastics, waste rubber and nitrocellulose account for 65%, industrial alcohol, coal tar, acetone and water solvent account for 15%, pigment and filler account for 15%, and a wet dispersing agent, a defoaming agent, a delustering agent and a plasticizer account for 5%; (2) fusion refining; (3) primary fining; (4) dispersing; (5) blending and color modulation; (6) filtering; (7) packaging. The technology disclosed by the invention is reasonable and compact, technological process is reduced greatly, paint source is wide, the technology belongs to waste reuse, and production cost is reduced; meanwhile, according to the raw material ratio, the technology is convenient for preparing various functional paints and can meet the requirement of production technology of the paints, dosage and ratio are accurate, deviation is small, product quality is guaranteed, and yield of enterprises is improved effectively.