965 results about "Cardanol" patented technology

The invention provides a novel epoxy coating and a preparation method thereof. The coating not only has excellent corrosion resistance, but also has excellent compatibility with a base material or a lower coating film, particularly an epoxy coating, a polyurethane coating, a fluorocarbon coating or an alkyd resin coating. The epoxy coating comprises a main paint and a curing agent, wherein the main paint contains bisphenol A epoxy resin and modifying resin for modifying the bisphenol A epoxy resin; and the curing agent contains polyamino amide and cardanol modified phenolic amine.

A polyester polymer is provided that includes at least one pendant phenolic-containing group. In one embodiment, the polyester polymer is combined with an optional crosslinker and an optional carrier to form a coating composition suitable for use in coating articles such as packaging articles. The coating composition typically includes a resole phenolic crosslinker. In one embodiment, the polyester polymer has at least one phenolic-containing group that comprises an adduct of cardanol.

The invention provides cardanol polyoxyethylene ether and a preparation method thereof. The cardanol polyoxyethylene ether is prepared by reacting cardanol and epoxy ethane. The method comprises the following steps of: adding a catalyst and the cardanol into a reaction kettle during a reaction; fully stirring at the temperature of between 150 and 180 DEG C; introducing the epoxy ethane into the reaction kettle; performing polyreaction with stirring; adding acetic acid after the reaction for neutralization; and discharging after cooling so as to obtain the cardanol polyoxyethylene ether. The cardanol polyoxyethylene ether and the preparation method thereof have the advantages of a small number of side reactions, good color and luster of a product, mild reaction condition and low cost of raw materials. Natural cardanol is taken as a raw material for producing, so that the adverse effect of alkylpheol ethoxylates synthesized from petroleum on the environment is avoided. The cardanol polyoxyethylene ether belongs to linear chain alkylpheol ethoxylates and the hydrophile-lipophile balance (HLB) of a nonionic surfactant can be controlled by adjusting the adduct number of the epoxy ethane according to a process, so that the cardanol polyoxyethylene ether can be taken as an emulsifier, a lubricant, a washing agent, a solubilizing agent and the like.

The invention discloses a cardanol-based antioxidant as well as a preparation method and application thereof. The cardanol-based antioxidant contains a compound with a structure shown as a formula (1): (shown in the description), wherein n ranges from 0 to 3; R1 and R2 are respectively and independently selected from H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; at least one of R3 and R4 has a structure shown as a formula (2) or (3): (shown in the description); R and R' are respectively and independently selected from H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; R5 is selected from -S-, -O-, -NH- or -(CH2)n'-; n' ranges from 0 to 3; Ra and Rb are respectively and independently selected from H, -OH, -SH, -NH2, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; m and m' are any integer of 0 to 3 respectively. The cardanol-based antioxidant disclosed by the invention has the characteristics of greenness, environmental protection, antioxidation property, excellent thermal stability and extreme pressure resistance and the like; a preparation process has the advantages of simplicity, feasibility, mild conditions and wide application prospect in the fields of multiple oil products, fuel, plastic, rubber, fibers, coatings and the like.

The invention relates to a curing agent used for epoxy resin coating and a preparation method thereof. The curing agent has the main component of cardanol-aldehyde amine, and is characterized in that the synthetic formulation of the cardanol-aldehyde amine comprises the following components based on the weight percentage: 60-70% of cardanol, 20-30% of polyamine, 10-20% of formaldehyde or paraformal-dehyde and 1-5% of 2, 4, 6ternary (dimethylamino methyl) phenol. Compared with common phenolic aldehyde amine curing agent, the curing agent has better water resisting property and flexility when being used for the epoxy resin coating, and generally does not affect the color mixing of finishing coat.

The invention discloses a cardanol epoxy floor curing agent and a preparation method thereof. Cardanol extracted from cashew shell oil which is a natural product serves as a raw material, and the cardanol with 15 long-chain hydrocarbyl substituents of carbon is reacted with alicyclic amine and a formaldehyde solution to prepare the cardanol epoxy floor curing agent, wherein the molar ratio of the cardanol to the alicyclic amine to the formaldehyde solution is 1:(1-1.5):(1-1.5); in the reaction, the cardanol is firstly added into a reactor, the formaldehyde solution is then added into the reactor for reaction, the alicyclic amine is dropwise added in the reactor, and the cardanol epoxy floor curing agent can be obtained after the material is discharged. In the invention, the synthesis is performed at low temperature; synthetic products have a longer application period; and alicyclics with higher rigidity and better stability are introduced in molecular structures of the products, therefore, an epoxy resin curing product has excellent mechanical properties.

The invention relates to a method for preparing a modified phenolic resin for a paper-base copper clad laminate substrate resin. In the method, cardanol is adopted together with an epoxide vegetable oil to modify a phenolic resin, the usage amount of tung oil is reduced considerably, the copper clad laminate manufactured by using the modified phenolic resin as a main resin has the advantages of excellent flexibility, low water absorptivity, high electrical insulation in wet state, low manufacturing cost and the like, and at the same time, a melamine resin is added to further modify the phenolic resin, so the drawback that the phenolic resin changes color due to the light is inhibited obviously and the modified phenolic resin prepared by the method can meet requirements on appearance color.

The invention relates to saturated cardanol polyoxyethylene ether and a preparation method thereof, which belongs to the technical field of organic synthesis, and the structural formula of the saturated cardanol polyoxyethylene ether is as follows, wherein n=2-30. The preparation method comprises the following steps: performing a hydrogenation reaction of cardanol; performing filtration and distillation, and performing an addition reaction with ethylene oxide; adjusting the pH value, filtering, and performing reduced-pressure distillation; or performing an addition reaction of cardanol and ethylene oxide; adjusting the pH value, filtering, performing a hydrogenation reaction, filtering, and performing reduced-pressure distillation. The preparation method of the invention uses cardanol as a raw material, and prepares cardanol polyoxyethylene ether with different ethylene oxide adduct numbers and saturated side chains; the product does not contain mixed unsaturated double bond structures, has surface activity, and has stable using performance.

The invention provides an environment-friendly braking friction material containing natural plant fiber, natural mineral fiber, natural mineral powder and cardanol-based benzoxazine modified phenolic resin and a preparation method thereof. The natural plant fiber is one or a plurality of flax, ramie, jute, hemp and sisal processed by a chemical method (alkali and acid) and a physical method (high-pressure steam), the natural mineral fiber comprises needle-like limestone and basalt fiber, and the natural mineral powder comprises zircon, barite, vermiculite and graphite. The invention also provides a preparation method of the natural mineral powder and cardanol-based benzoxazine pellet and a preparation method of cardanol-based benzoxazine in-situ toughening phenolic resin.

The invention provides a method for preparing modified phenolic resin by adopting cardanol. The method adopts phenol, methanal, the cardanol, auxiliary agent and hydrochloric acid to have reaction; the pH value of a reaction system is controlled to be within the range of 1.5-2.0, the temperature is slowly raised to 80-90DEG C, and then heating is stopped; the heat of the reaction is released untilthe temperature of the reaction system is 100 DEG C, and the reactant begins to boil; and after heat preservation reaction is stabilized for 2-3h, decompression dehydration can be carried out, so that the phenolic resin can be obtained. The performance of the modified phenolic resin can be measured under the experiment condition, the softening point is 82-90 DEG C, the flowing degree is 2.9-5.0cm, the polymerization speed is 60-90S, the viscosity is 12-15mpa*s, and the temperature is 25DEG C. The method can greatly reduce the manufacturing cost of the phenolic resin, so that the phenolic resin has good market prospect. The phenolic resin is environment-friendly and has no volatile component, thus being successfully applied to the coating industry by consumers. Furthermore, the method improves the inoxidizability and the heat resistance of the phenolic resin.

The invention relates to a benzoxazine resin based on furfuryl amine, a composition and a preparation method thereof. The benzoxazine resin is prepared from phenol derived from renewable resources (for example, eugenol, guaiacol and cardanol), primary amine derived from renewable resources (for example, furfuryl amine) and an aqueous solution of paraformaldehyde or trioxymethylene or formaldehyde; and the relevant composition is a composition prepared from the benzoxazine resin and other thermosetting resins. The benzoxazine resin based on furfuryl amine and the composition thereof can be used in multiple fields of matrix resins of paint, thermosetting plastic, composite material and the like.

The invention relates to cardanol polyether polyol and a use thereof. The cardanol polyether polyol comprises cardanol aminal-based polyethylene oxide/propylene oxide polyether polyol and has a hydroxyl value of 220 to 550 and viscosity less than 4500CPS. The cardanol polyether polyol is environmentally friendly. Compared with other phenol-based Mannich polyols, the cardanol polyether polyol has specific physical and chemical properties, and can be used for preparation of polyurethane foam materials such as flame-retardant materials, energy-absorbing semi-rigid foam materials, high-resilience foam materials, polyurethane coatings and other polyurethane elastomeric materials.

The invention provides cardanol polyoxyethylene ether ammonium sulfate and a preparation method thereof. The preparation method comprises the following steps of: adding cardanol polyoxyethylene ether into a reactor provided with a stirrer, fully stirring at constant temperature and adding sulfamic acid and a catalyst; and stirring, reacting at constant temperature for 7 to 9 hours, neutralizing excessive sulfamic acid in the reaction system to a pH value of 8 to 10 by using sodium hydroxide, cooling, and filtering to prepare the cardanol polyoxyethylene ether ammonium sulfate. The cardanol polyoxyethylene ether which is prepared from natural cardanol is taken as a raw material for production, the negative influence of petroleum-synthesized cardanol polyoxyethylene ether ammonium sulfate on environment is avoided, the defects of more waste acid, high product saltness, complex technical control operation and the like in the technical route that the alkylpheol polyoxyethylene ether and a sulfating agent are directly reacted are overcome, and sulfated products is not needed to be neutralized by ammonia water or liquid ammonia.

The invention relates to a preparation method of a cardanol-based high temperature-resistant epoxy resin curing agent. The preparation method comprises the steps of firstly weighing cardanol, a phenolic compound, paraformaldehyde and diamine or polyamine according to weight, adding the cardanol, the phenolic compound and the paraformaldehyde into a reaction container, adding a catalyst, heating at the temperature of 75-100 DEG C for 2-6h to obtain an intermediate, then cooling the intermediate to 60-68 DEG C, adding the diamine or the polyamine, adding the remaining paraformaldehyde at the temperature in a stirring state, then heating till the temperature achieves 65-95 DEG C, reacting for 4-8h, and dehydrating in a vacuum state to obtain the cardanol-based high temperature-resistant epoxy resin curing agent provided by the invention. The synthesized curing agent has the advantages of great surface hardness and Shore hardness, excellent gloss, good high temperature resistance and low-temperature fast curing. According to the preparation method disclosed by the invention, the epoxy resin curing agent with a wide range of curing temperature, high temperature resistance and excellent surface performance is obtained and is suitable for requirements of primer paint and finish paint.

The invention relates to a novel accelerant and a novel curing agent, a preparation method and an application thereof. The preparation method of the novel accelerant comprises: providing at least natural cardanol or artificial cardanol compound which has a chemical structural formula as shown in a formula VIII, wherein R is C15H2X+1, X is an integer between 12 and 15, and Z is H or OH; providing an aldehydes compound; providing an alkyl amine compound which has secondary amine; mixing the cardanol compound, the aldehydes compound and the alkyl amine compound, heating, and performing a mannich condensation reaction to form the accelerant. The invention further relates to the novel accelerant and the novel curing agent.

The invention provides a solvent-free cardanol epoxy heavy anticorrosive paint, comprising 40-60 wt% of butyronitrile modified epoxy; 20-40 wt % of cardanol epoxy firming agent; 5-20 wt % of reactive diluent; 10-30 wt % of color filler and 5-8 wt% of additive. The invention further provides a preparation method of the solvent-free cardanol epoxy heavy anticorrosive paint, comprising the following steps: evenly mixing, stirring and milling the butyronitrile modified epoxy, the reactive diluent, the color filler and the additive so as to obtain component A according to mixture ratio of the solvent-free cardanol epoxy heavy anticorrosive paint; taking the cardanol epoxy firming agent as component B; and evenly mixing and stirring the component A and comment B when in use. The invention has the advantages of good high-temperature resistance property, good oil resistant property, strong chemicals corrosion resistance property, good construction matching property, good matching use property with the cathode protector of a storage tank, stable curing reaction in low-temperature moist environment, long service life, outstanding paint film insulating property, no environmental pollution, no irritating gas as well as simple, safe, environmental protection and healthy use.

The invention provides a preparation method of a mixed cresol modified meta-xylylene diamine epoxy resin curing agent. The method comprises the following steps of: adding meta-xylylene diamine into an N2-charged reaction kettle; raising the temperature to 80-95 DEG C; adding hydroquinone; fully mixing; adding cardanol; keeping the temperature at 85-95 DEG C till a solution is clear and transparent; adding a catalyst; gradually adding polyformaldehyde in batches simultaneously; lowering the temperature to 70-80 DEG C; vacuumizing and dehydrating; after dehydrating, raising the temperature to 130-150 DEG C; undergoing a polymerization reaction; cooling to 70-85 DEG C; filtering the catalyst; diluting to 15-25 percent by using an organic solvent; and discharging to obtain the mixed cresol modified meta-xylylene diamine epoxy resin curing agent. A product prepared with the method has the advantages of stable performance, high curing speed, low toxicity, high transparency, unremarkable whitening phenomenon, nontoxicity and freeness of irritation, can be applied to underwater construction, and is a superior sea heavy-duty coating.

The invention discloses a high-performance rust inhibiting primer for low surface treatment of mechanical equipment. The high-performance rust inhibiting primer is composed of a component A and a component B, wherein the component A comprises the following components in parts by mass: 50.0-57.0 parts of bisphenol A epoxy resin, 2.0-6.0 parts of modified resin, 1.0-3.0 parts of reactive toughening agent, 1.2-2.0 parts of penetrating agent, 9.0-11.0 parts of organic solvent, 2.0-5.0 parts of gradient alcohol solvent, 0.2-0.5 part of defoaming agent, 0.3-1.5 parts of wetting dispersant, 24.0-55.0 parts of rust inhibiting filler, 1.0-3.0 parts of rust converting agent and 0.1-0.3 part of substrate wetting agent; the component B comprises the following components in parts by mass: 13.0-14.0 parts of cardanol modified Mannich amide curing agent, 0.3-1.0 part of adhesive force promoter and 5.0-9.0 parts of organic solvent; and the mass ratio of the component A to the component B is 5:1 to 6:1. The primer has excellent adhesive force and favorable curing and film forming properties when coated on a wet substrate with the rust layer thickness of less than 80mum, so that the requirement for low surface treatment of the mechanical equipment is met.

The invention relates to a method for preparing a cardanol modified phenolic paper-based copper clad plate. The method comprises the following steps: step 1), preparing a mixed solution of modified phenolic resin, namely, firstly, preparing cardanol modified phenolic resin, then preparing tung oil modified phenolic resin, then mixing the cardanol modified phenolic resin with the prepared tung oil modified phenolic resin according to a mass ratio of 1:1, then adding epoxidized soybean oil, and fully stirring to obtain the mixed solution of modified phenolic resin; and step 2), preparing the copper clad plate, namely, socking a wood fiber insulation paper in the mixed solution of modified phenolic resin prepared in the step 1), then drying and cutting to prepare a phenolic paper base, and then coating a copper foil on the surface of the phenolic paper base for compressing and molding so as to obtain the finished product. The method for preparing the cardanol modified phenolic paper-based copper clad plate is low in production cost, and the prepared copper clad plate has good flexibility.