411 results about "Mannich base" patented technology

The invention provides a preparation method of reaction type Mannich polyether polyol with permanent flame retardant effect. The preparation method of reaction type Mannich polyether polyol with permanent flame retardant effect comprises the following steps: reacting paraformaldehyde or formaldehyde solution with diethanol amine to obtain 3-ethoxyl-1,3-oxazolidine reaction liquid, and then carrying out reduced pressure distillation to obtain the product 3-ethoxyl-1,3-oxazolidine; reacting aromatic phenol compounds or / and melamine compounds with 3-ethoxyl-1,3-oxazolidine to obtain Mannich base as intermediate; and carrying out polymerization reaction between the intermediate Mannich base and epoxy compound to obtain crude product of reaction type Mannich polyether polyol with permanent flame retardant effect, then carrying out reduced pressure distillation to remove impurities with low boiling points, and thus obtaining finished product. The reaction type Mannich polyether polyol simultaneously has the high stability and thermal stability of rigid polyurethane foam and the flame resistance of phenolic foam, is applied to foaming rigid polyurethane foam, and has wide application prospect.

The invention discloses a non-ionic self-emulsifying epoxy resin curing agent and a preparation method thereof. The method comprises that polyethylene glycol and epoxy resin of low molecular weight are adopted to pre-prepare a water-based chain segment under the function of a catalytic agent, the water-based segment is reacted with a mannich base which is prepared from cardanol, formaldehyde and polymine, and at the same time, organosilicone is added to conduct partial end blocking, compatibility of a system on an inorganic component is increased, and the non-ionic cashew phenol amine epoxy curing agent with the self-emulsifying capacity is obtained. The natural cardanol and the polyethylene glycol in the main raw materials of the curing agent have no adverse effect on environment. The prepared curing agent integrates the advantages of non-ionic emulsion and cashew phenol amine.

Arylamines with electron donating groups such as alkyl and alkoxy groups in the meta position on the aromatic ring change the polymerization temperature of the benzoxazine prepared therefrom and offer an opportunity for an additional crosslinking site (the para position on the aromatic amine can couple to a Mannich base generated by the opening of the oxazine ring of the benzoxazine or a methylene bridge generated by a degradation reaction). Naphthenic amines with an alkyl or alkoxy substituent on the 5th through the 8th carbon atom on the naphthalene ring can function similarly. The polymers for benzoxazines prepared from at least 10% substituted aromatic or naphthenic amines are useful due to low polymerization temperatures and higher Tg (glass transition temperature).

The invention relates to a preparation method of acidizing corrosion inhibitor in a high-temperature and concentrated acid environment. The preparation method is used for an acidification technology in carbonate oil reservoir exploration and overcomes the problem that existing high-temperature acidification corrosion inhibitor is poor in solubility and dispersion in use and prone to coking. According to the technical scheme, firstly, formaldehyde, benzene methanamine, absolute ethyl alcohol and concentrated hydrochloric acid are added into a three-necked flask, and then the three-necked flask is placed into an oil bath pan with the temperature being 110 DEG C for conducting a reaction for 2 hours; then, acetophenone is added, the pH is adjusted to 4 through concentrated hydrochloric acid, a reaction is conducted for 4 hours, and a coarse mannich base is obtained; thirdly, a vacuum rotary evaporation instrument is utilized for purification, separation is conducted, and a mannich base intermediate is obtained; fourthly, after the intermediate obtained in step 3 is washed, benzyl chloride is added, a reaction is conducted for 6 hours at the temperature of 110 DEG C, evaporation and separation are conducted through the vacuum rotary evaporation instrument, and mannich base quaternary ammonium salt is obtained; finally, potassium iodide is added in the mannich base quaternary ammonium salt stirring process for conducting mixed distribution, and the high-temperature acidizing corrosion inhibitor is obtained. The acidizing corrosion inhibitor has good solubility and dispersion, can further improve corrosion inhibition efficiency and is good in stability.

The invention belongs to the technical field of epoxy resin curing agent preparation technology, and discloses an epoxy resin solvent-free low temperature curing agent, a preparation method and an application. The curing agent can be better used in cement mortar and used for preparing epoxy grouting material under low temperature in water environment. The curing agent comprises the following components by mass percentage: 79.9-97.2% of modified phenolic amine, 0.8-5.6% of coupling agent, 1.7-9.1% of flexibilizer, 0.1-0.9% of antifoaming agent and 0.2-4.5% of catalyst. According to the invention, thiourea group is introduced, thiourea modified amine, polyamine, long chain alkylphenol and paraformaldehyde are performed a Mannich reaction to synthesize novel thioureido-containing Mannich base, so that solidification rate under low temperature environment is increased, disadvantage of poor solidification efficiency under wet surface and water can be overcome, and a silane coupling agent is added for improving surface tension of system contact surface and increasing the solidification efficiency under water environment.

The invention relates to a high-solid surface-tolerant epoxy zinc-rich primer. The primer is prepared from a component A and a component B according to a weight ratio of (16-20):1; the component A comprises the following components in parts by weight: 5-9 parts of liquid phenolic epoxy resin, 6-15 parts of E20 solid epoxy resin, 0.5-1.5 parts of an active diluent, 0.1-0.3 part of a dispersing agent, 70-80 parts of main rust-proof pigment, 2-6 parts of chemical anti-rust pigment, 1.5-2.5 parts of an anti-settling agent and 3-4 parts of an organic mixed solvent; and the component B comprises thefollowing components in parts by weight: 1.5-2.5 parts of a polyamide curing agent, 2-3 parts of a Mannich base curing agent, 0.3-0.6 part of a silane coupling agent and 0.2-0.6 part of an organic mixed solvent. The invention also relates to a preparation method of the primer and a coating film. The primer is high in solid content and low in VOC content, is resistant to corrosion, has a long effect, has good adhesive force and salt fog resistance, and is particularly suitable for repairing and maintaining equipment in industries such as chemical industry, thermoelectricity, machinery and thelike.

The present invention relates to a mannich base which is synthesized by the mannich reaction of dimeric cyclohexanone and formaldehyde with at least one kind of polyamine, wherein, the dimeric cyclohexanone is the dimer of the cyclohexanone, comprising the single or mixed form of 2-(1-cyclohexenyl) cyclohexanone, 2-(1-cyclohexyl) cyclohexanone and 2-(1-cyclohexylidene) cyclohexanone. The concrete preparation method of the product of the present invention is characterized in that by-product containing dimeric cyclohexanone autoclave liquid during the process of the cyclohexanone production is processed for the saponification treatment to collect the dimeric cyclohexanone by distilling (or obtain the dimeric cyclohexanone product directly), the dimeric cyclohexanone and the formaldehyde react with at least one kind of the polyamine for one to ten hours under 10 DEG C to 100 DEG C to be dehydrated to obtain the product. The product of the present invention is mainly used as curing agent to be applied in an epoxy system or a polyurethane system.

The invention discloses a high-temperature O2 / CO2 corrosion inhibitor for coiled tubing. The high-temperature O2 / CO2 corrosion inhibitor for the coiled tubing is used by matching an agent A mainly used for deoxidizing and an agent B mainly used for resisting corrosion of carbon dioxide, wherein the agent A is acetone oxime, D-ascorbic acid, sodium sulfite or ferrous sulphate; and the agent B is formed by mixing the components in percentage by weight: 20-30 percent of quaternary pyridine salt, 10-15 percent of mannich base chelate, 3-7 percent of surfactant and 48-67 percent of solvent. The quaternary pyridine salt is obtained by reacting pyridine with benzyl chloride; and the mannich base chelate is obtained by aldehyde ketone amine condensate generated by morpholine, trioxymethylene and dimethylamine through a mannich reaction with metal chloride. The corrosion inhibitor provided by the invention has use temperature up to 170DEG C, is suitable for a water-corrosive medium in which oxygen and carbon dioxde coexist and can be used for effectively inhibiting the corrosion of media such as the oxygen and the carbon dioxide and ensuring safe operation of the coiled tubing in the production process.