380 results about "Free phenol" patented technology

Provided herein are sulfurized metal alkyl phenate compositions having a low alkyl phenol content. The sulfurized metal alkyl phenate compositions can be prepared by reacting a phenol compound of Formula (I) disclosed herein with an aldehyde to form a phenolic resin of Formula (II) disclosed herein and then by reacting the phenolic resin simultaneously with a metal base and a first sulfurizing agent. The sulfurized metal alkyl phenate compositions and the overbased sulfurized metal alkyl phenate compositions disclosed herein may be used as detergents for formulating lubricating oil compositions. The lubricating oil compositions disclosed herein have a reduced amount of the free phenol compound and a salt thereof.

The invention discloses a preparation method of a phenolated lignin amine cationic emulsifier. The method comprises the following steps: heating an alkaline liquid of alkali lignin and a proper amount of phenol to 70-100 DEG C and reacting for 1-3h, then, acidizing a reaction liquid to realize pH=2.5 with 1 mol/L hydrochloric acid, performing suction filtration, washing with hot water at 80-100 DEG C until free phenol disappears completely, thus obtaining phenolated lignin; dissolving the phenolated lignin in a NaOH liquid with mass fraction of 10% and regulating pH to 10.5-12, then, further adding a mixed liquid of a certain amount of small molecule polyamine and 37% formaldehyde, reacting for 3-5h at 90 DEG C, then, introducing amine methyl hydrophilic groups into the phenolated lignin, thereby obtaining the cationic emulsifier which has positive electricity under the condition of diluted acid. In comparison with the cationic emulsifier modified by the lignin which is not phenolated, the emulsifier provided by the invention has higher surface activity, stronger Zeta potential and stronger emulsion stability, and can be widely used in the fields of road engineering, building waterproofing, material corrosion prevention, water conservancy construction, and so on.

The invention relates to a production method of cashew nut oil modified phenolic resin. Phenol and cashew nut oil are sufficiently mixed under the acidic or alkaline environment, wherein, the main ingredient of the cashew nut oil is the polyhydric phenol of C8-C27, the weight of the cashew nut oil accounts for twenty to thirty percent (weight percentage) of the total weight of the cashew nut oil and the phenol, and the acidic environment is obtained by using catalyst, the addition amount of which is one to three percent (one to two percent for the alkaline environment); the mixture is mixed with formaldehyde, temperature is raised, reaction lasts until the synthesis of the phenolic resin is finished, and wherein, the molar ratio of the formaldehyde is 1:0.72 to 0.78 (1:1.2 to 1.4 for the alkaline environment. the catalyst must be ammonia). The thermoplastic phenolic resin prepared by the invention is characterized in low free phenol and high molecular weight and can be applied to not only molding materials but also friction materials; meanwhile, the production process of the modified phenolic moulding materials is simple, the use amount of phenol and formaldehyde is reduced, the concentration of wastewater is lowered, and therefore environment is protected; moreover, the plant oil applied by the preparation method of the invention is a regenerative resource.

The invention provides a method for preparing sodium lignosulfonate. The method comprises the following steps: (A) providing a lignin suspension; (B) regulating the pH value of the suspension to 4.8-8.5; (C) sequentially adding sodium sulfite and formaldehyde to the suspension with pH value of 4.8-8.5, reacting and filtering to obtain filtrate; (D) mixing the filtrate with a sealant and reacting to obtain sodium lignosulfonate. The method provided by the invention has the advantages that the reaction between lignin and sodium sulfite and formaldehyde is controlled by controlling the adding order of sodium sulfite and formaldehyde; the filtrate obtained through filtering after reaction is reacted with the sealant to react with the free phenol hydroxyl, so that obtained sodium lignosulfonate has good dispersion property, excellent performance when used as the dye dispersant and little textile staining while having high heat stability.

The present invention is melamine and urea modified resin and its production process. The material includes urea in 5-50 weight portions, melamine in 5-50 weight portions, phenol in 25-50 weight portions, formaldehyde in 12-300 weight portions and water in 0-250 weight portions. The production process includes the following steps: smelting phenol in the reaction kettle, adding formaldehyde, urea and melamine, regulating pH to 6-8, heating to 75-100 deg.c, maintaining for 30-100min, regulating pH to 3.0-5.5 for condensation reaction at viscosity not lower than 20S, regulating pH to 7.5-12, adding water and formaldehyde optionally, controlling temperature in 80-95 deg.c to react to terminal. The melamine and urea modified resin is yellow or brown transparent colloid liquid with pH 7.5-12, free phenol in 0.5-10 %, free aldehyde less than 2.0 %, and solid content 30-75 % and storage life over 1 month. It is used as adhesive for timber, friction plate, etc.

A phenol-free coated sand is characterized in that the coated sand is prepared from silicon sand, phenol-formaldehyde resin, urotropine, calcium stearate and macromolecular substances containing amino groups. The preparation method comprises the following steps of: (1) heating the silicon sand to 140 to 160 DEG C; (2) adding the phenol-formaldehyde resin and additives; (3) adding aqueous solution of the urotropine; (4) adding the calcium stearate; and (5) sieving to obtain the phenol-free coated sand. The phenol-free coated sand has the advantages that a material for reducing the content of free phenols and improving sand core performance is the reaction resultant of the macromolecular substances containing amino groups and the free phenols, which is an intermediate substance with a certain chemical reaction activity and can crosslink with each other to form macromolecules in hot curing reaction for core manufacture or formation. The macromolecules have infusibility and melting resistance, good thermal stability, no phenol volatilization and less production of smoke, and can increase the strength and the toughness of sand core or sand mold and improve the melting point of the coated sand by a certain degree, thus greatly improving the performance of the sand core.

The invention provides an aldehydeless heavy component material. The material comprises a plurality of bamboo (wood) bundles formed by a cis-grain parallel structure; an adhesive layer is arranged between the adjacent bamboo (wood) bundles and in the gap of each bamboo (wood) bundle; and an adhesive of the adhesive layer is aromatic diisocyanate. The adhesive application amount is 5 to 20 percentof absolute dry weight of the bamboo (wood) bundle. The invention also provides a method for manufacturing the heavy component material; the method comprises working procedures of the manufacture of the bamboo (wood) bundle, drying, adhesive application, assembly, curing molding, and post treatment, and the like. In the adhesive application procedure, the used adhesive is the aromatic diisocyanate; and the adopted adhesive application method is an adhesive application method through spraying. The method adopts the aromatic diisocyanate adhesive, so that formaldehyde release amount and free phenol detection value of the heavy component material are the same as the detection value of a bamboo (wood) base material, and the heavy component material has good bonding performance and strengthensthe mechanical performance of the heavy component material; the adhesive application method is adopted adhesive spraying in the process, so the manufacturing method greatly reduces the adhesive application amount, and application of the aromatic diisocyanate adhesive with high cost to the heavy component material has feasibility of implementation.

The invention discloses a modified phenol formaldehyde resin which is synthesized from the following raw materials: 4-25% of phenol, 30-60% of formaldehyde water solution, 2-15% of urea, 2-15% of melamine, 3-8% of alkaline water solution and 10-30% of water. The preparation method comprises the following steps: after adding the formaldehyde water solution, adding the urea, phenol and melamine by stages in an alkaline environment, and controlling the viscosity or water solubility of the intermediate product and the final product in the preparation process, thereby obtaining the modified phenol formaldehyde resin. The raw materials of the modified phenol formaldehyde resin are added by stages to perform sufficient reaction, thereby improving the comprehensive properties of the phenol formaldehyde resin, including lower contents of free aldehyde and free phenol, lighter resin color, higher water boiling property and better wettability. The invention is more suitable for manufacturing of recombined bamboo, and is also applicable to the fields of dipping treatment of paper wood, bamboo, wood and fabric bases as well as manufacturing of grinding tools.

A dual catalyst system thermoplastic phenolic resin preparation method comprises the steps of proportioning, refluxing and reacting, and drying; the raw materials comprises phenol or m-cresol and aldehydes compound, water, organic acid or inorganic acid and bivalent acetate in a molar ratio of 1:0.5-0.9:0-3.0:0.001-0.040:0.001-0.020; wherein, acetate is used as first catalyst and organic acid or inorganic acid is used as second catalyst in reaction process. The invention adopts phenolic aldehyde addition-condensation reaction in dual catalyst system to prepare the thermoplastic phenolic resin; the method has the advantage of rapid polymerization rate, high yield and low content of free phenols; the thermoplastic phenolic resin can be applied for preparing the coated sand and the prepared coated sand has higher hot tensile strength and tensile strength at room temperature.

The invention discloses a preparation method of a thermosetting acrylic resin binder which does not contain formaldehyde. The preparation method comprises the following steps: carrying out graft copolymerization reaction on a acrylic acid type compound and an acrylic acid polyester compound under the action of an initiator, a chain transfer agent and a retarder so as to obtain a thermosetting acrylic resin; subsequently adding a softening agent, a curing agent, an emulsifying agent and a mildew preventive; stirring uniformly and filtering so as to prepare the thermosetting acrylic resin binder used for glass wool. The binder prepared by using the method does not contain free formaldehyde and free phenol, so the product does not release free aldehyde during the application process and is an environment-friendly green binder.

The invention discloses a high-glue content adhesive for a flexible glass fiber felt. The adhesive is composed of a water-solubility phenolic resin with high free formaldehyde content, urea, melamine, emulsified silicon oil, softened water, a silane coupling agent, a curing agent, a PH conditioning agent and the like. The water-solubility phenolic resin which has low smoke density, good flowing performance, adhesive property and flame retardant property and high free formaldehyde content is adopted in the adhesive to serve as the main raw material; the weather resistance performance and the heat resistance performance of the modified resin are increased; and the felt which has 13-22% of glue content and can be crimped and formed can be obtained. Simultaneously, the invention relates to a synthetic method of the formaldehyde-free glass fiber felt. The adhesive product provided by the invention has the excellent bonding strength, flexibility, water resistant performance, ageing resistant performance, high temperature resistant performance, corrosion resistant performance and flame retardant property, is free of the release of formaldehyde and free phenol and reduces the damage on human bodies, thereby meeting the requirement of environmental protection.

A synthesis method of thermosetting phenol-formaldehyde resin in solid at normal temperature comprises mixing, reflux reaction, and vacuum dehydration. The invention adopts phenol or cresol and aldehyde compound as reactant and alkali as catalyst, preparation parameters is regulated and hydroxymethyl generation speed is controlled to avoid excessive hydroxymethyl existing in the reaction system and gel production, and the thermosetting phenol-formaldehyde resin in solid at normal temperature with 0.4-0.6 hydroxymethyl content is prepared. Compared with the prior preparation method of phenol-formaldehyde resin, the invention has the advantages that gel production is difficult in synthesis process, the synthetic thermosetting phenol-formaldehyde resin is high in hydroxymethyl content, low in free phenol content and is solid at normal temperature, and environmental pollution is less, storage period is long, transportation and use are convenient, etc. The method of the invention can be used for synthesizing solid thermosetting phenol-formaldehyde.

This invention relates to a method for preparing ammonia-free phenol formaldehyde molding material. The ammonia-free phenol formaldehyde molding material comprises: acid-catalyzed thermoplastic phenol formaldehyde resin 20-50%, curing agent 10-45%, curing accelerator 0.5-4%, organic filler 10-40%, and inorganic filler 10-40%, and lubricant 1-3%. The curing agent is at least one of melamine formaldehyde resin and urea formaldehyde resin. The curing agent is at least one of melamine formaldehyde resin and urea formaldehyde resin. The curing accelerator is at least one of MgO, Mg (OH) 2, CaO and Ca (OH) 2. The organic filler is fiber powder of at least one of wood, bamboo, cotton and hemp. The inorganic filler is at least one of CaCO3, talcum, mica, quartz and asbestos powder. The lubricant is at least one of stearic acid, zinc stearate and ethylene stearamide. The method has such advantages as simple process and low cost. The product has such advantages as no free ammonia, stable quality and long storage period, and can be used to manufacture instrument components.

The invention discloses a manufacturing method of energy-saving modified phenol resin glue, which comprises the following parts: 25-50 percent phenol, 5-50 percent melamine, 12-252 percent formaldehyde, 0-85 percent water. The making method comprises the following steps: fusing the phenol into liquid in the autoclave; adding formaldehyde; putting alkali to adjust pH value at 7.5-9.5; heating to 40-60 deg.c; adding melamine; stirring evenly; adjusting pH value at 7.5-9.5 again; heating to 80-95 deg.c; keeping temperature to react for 40-90 min; detecting through water times; cooling to 45 deg.c; discharging. The appearance of glue displays yellow transparent glue liquid, whose storing time is more than two months with 7.5-9.5 pH value, 3-10 percent free phenol and 40-75 percent solid content.

The invention discloses a scrimber and a manufacturing method thereof. The scrimber is prepared by the following steps: taking braches as raw materials, and cutting, peeling and grinding the branchesinto bunchy macrofiber; removing hemicelluloses and pectin; dipping a water soluble phenol formaldehyde adhesive; extracting free phenol and water content of the free phenol in vacuum; warmly pressinginto sections; performing curing; and performing after curing. The physical and mechanical properties of the scrimber are as follows: the density is between 0.9 and 1.3g/cm<3>; the hardness is between 60 and 120MPa; the static bending strength is between 90 and 150MPa; the water-absorbing expansion rate is between 0.3 and 2 percent; and the formaldehyde emission is between 0.1 and 0.4mg/L. The invention has the advantages that: the invention provides a scrimber product with no mold, no crack and no horizontal warpage; the manufacturing method for the scrimber has reasonable process, high efficiency, low energy consumption and no environmental pollution, the production flow has strong continuity and high connection degree, and the scrimber can be produced on a large scale; and the prospectof fully utilizing branch resources is better.

The invention discloses cashew nut oil-modified phenolic resin and a preparation method thereof. The method comprises the following steps of: making phenol and formaldehyde react under the condition of an acid catalyst to prepare a phenol-formaldehyde polycondensate; and adding cashew nut oil into the phenol-formaldehyde polycondensate, controlling the reaction temperature at 150-220 DEG C, keeping reacting for 1-5 hours, distilling under reduced pressure at the vacuum degree of between -0.03 MPa and -0.1MPa till the softening point of resin is 70-120 DEG C, and neutralizing the acid catalyst with a neutralizer to obtain the cashew nut oil-modified phenolic resin, wherein the molar ratio of the formaldehyde to the phenol is (0.5-0.76):1; the acid catalyst is alkylbenzenesulfonic acid, p-toluenesulfonic acid, oxalic acid, hydrochloric acid or sulfuric acid; and the cashew nut oil-modified phenolic resin is C15 polyatomic phenol of which the side chain is provided with unsaturated double bonds. According to the preparation method of the cashew nut oil-modified phenolic resin provided by the invention, the problem of easiness in gelling a product in the prior art is solved, and the resin has the characteristic of low free phenol content. When taken as a reinforcing agent of rubber and a tire, the cashew nut oil-modified phenolic resin better contributes to improving the reinforcing performance of a sizing material than unmodified phenol-formaldehyde resin.

The invention discloses a comprehensive utilization method of phenolic resin wastewater, belonging to the technical field of processing wastewater produced in the fine chemical engineering industry. The comprehensive utilization method comprises the steps of: adding the phenolic resin wastewater, an acid catalyst and formaldehyde in a condensation polymerization kettle according to the proportion, raising the temperature until the phenolic resin wastewater, the acid catalyst and the formaldehyde are boiled, preserving temperature for reaction; then reducing the temperature in the kettle, pumping materials in the condensation polymerization kettle into a settlement separation kettle by using a pump to reduce the temperature and settle and demix; flowing a lower layer resin material of a settlement formed by demixing into a resin synthesis kettle through a pipeline, adding the acid catalyst and the formaldehyde, raising temperature and boiling for reaction, vacuum dewatering to obtain thermoplastic phenolic resin; and injecting one part of wastewater with content of the free phenol formed after the settlement formed in the condensation polymerization kettle, which is reduced to be below 1 percent, into a water borne resin synthesis kettle to be used for reducing water soluble resin, absorbing the formaldehyde in a primary and a secondary absorption towers one part of which is injected with industrial formaldehyde, and forming the industrial formaldehyde. The invention realizes the purpose that the phenolic resin industrial wastewater achieves zero emission.

The invention discloses a preparation method of a styrenated hindered phenol or styrenated phenol antioxidant product, belonging to the field of preparation process methods of polymer antioxidant products. The preparation method is characterized in that: o-tert-butyl phenol or phenol, p-cresol, o-cresol and m-cresol are used as raw materials, styrene is used as an alkylation reagent, an organic acid compound is used as a catalyst, a small amount of polymerization inhibitor is added, and the styrenated hindered phenol product or styrenated phenol product is prepared through catalytic alkylation reaction; a neutralizing and decolorizing agent is added to the styrenated product to deactivate the acidic catalyst and remove the coloring source material, thus obtaining a white-like or light yellow viscous liquid namely the styrenated phenol antioxidant product which has clear and transparent appearance, pH value of 6.5-7.5, storage stability and high use efficiency; and the styrenated phenol antioxidant product is free of water-soluble pollutants such as free phenol or methyl phenol, thereby solving the problem of environmental pollution caused by the use of the product in styrene butadiene rubber latex.

The invention discloses a modified alkyd resin of laminated board, preparing method and usage in phenol resin domain, which is characterized by the following: adopting organic phenol monomer with linear hydrocarbon group and aldehydes monomer under the function of activator; getting the product; making the resin as transparent liquid with low viscosity and high dipping property; setting the number average molecular weight between 450 and 600 (GPC detection); decreasing evolution and discharge of free phenol effectively; adopting compatible diluent system. This resin possesses good storing stability, which is fit for dipping paper, cotton fabric and fiberglass cloth and so on reinforced materials.

The invention discloses an alkyl phenol aldehyde resin and a synthesis method thereof. The synthesis method comprises the following steps: adding raw materials mono-substituted alkyl phenol and di-substituted alkyl phenol into a reactor, reacting with aldehyde under the action of an acidic catalyst, heating for dehydration, adding aldehyde, and reacting to obtain the alkyl phenol aldehyde resin. Compared with like alkyl phenol aldehyde resins, the alkyl phenol aldehyde resin disclosed by the invention has obviously higher tackifying effect and lower free phenol content. The invention also discloses application of the alkyl phenol aldehyde resin in production manufacturing of tires and rubber products.

The invention discloses a thermosetting phenolic resin cured and foamed rapidly at normal temperature, a preparation method and application thereof, belonging to the technical filed of high polymer materials. The method of the invention comprises the following steps: carrying out condensation reaction on phenol and formaldehyde, and then adding urea and glycol to improve the performance of resin, such as stability, hydrophilcity and foaming effect. The phenolic resin provided by the invention has the characteristics of low content of phenol and aldehyde, greatly improved environment protection performance, no residual free phenol and aldehyde after curing, high activity and stable storage and the like; the phenolic resin can be used as a plugging material, and can be rapidly cured not only under normal temperature of 20-25 DEG C but also under low temperature of 10-15 DEG C, thereby being applied to various fields such as engineering plugging and the like.