The method of obtaining the hardeners of epoxy resins cold curing
The invention relates to the production of hardeners used in the epoxy compounds intended for corrosion protection and other Hardeners of epoxy resins of cold hardening receive a mixture of aromatic and aliphatic di - or polyamines and the introduction of salicylic acid. Previously obtained by interaction of aromatic di - or polyamine (And) salicylic acid (B), dissolved in the product of esterification of orthophthalic acid with a hydroxyl-containing compound (C) selected from the group comprising butyl, icononly, benzyl alcohol, by mixing the components in the reactor at a temperature of 5090oWith over 640 min in the ratio a:B:wt.h. from 98:1:1 to 10:20:70. In another reactor pre-gain product of the interaction of aliphatic di - or polyamine (G) with the same components by mixing them at a temperature of 3055oC for 325 min in the ratio of G:B:wt.h. from 96:2:2 to 4:16:80, after which the resulting interaction products based on aromatic and aliphatic di - or polyamines are mixed at a temperature of 15The invention relates to a method for production of hardeners epoxy cold cured with aromatic amines and can be used in the production of hardeners used in the epoxy compounds intended for corrosion protection, as self-leveling floors in the building, for impregnation of reinforcing fillers in contact molding and other purposes.A method of obtaining hardeners epoxy cold cured by mixing an aromatic amine with cresol and salicylic acid or a liquid mixture of 3 aromatic amines with salicylic acid (see C. A. lapitskiy, A. A. Kritsuk, "Physico-mechanical properties of epoxy polymers and plastics, Kiev: "Naukova Dumka", 1986, S. 26-27).This method allows to obtain hardeners, providing for cold curing higher strength properties and deformation resistant epoxy polymers compared with those obtained using as hardeners �chr/247.gif">2 h at 20o(C) that it is not possible to prepare them in advance and set as a commodity product, that is in the works with the use of such hardeners they need to cook small portions and immediately used. In addition, the known method involves the use of toxic components - cresol and meta-phenylenediamine, causing toxic effects on the workers and pollute the environment. Caulk same polymers although greater than those on structural performance and heat resistance, cured aliphatic amines, but have insufficient wear resistance and vibration resistance. The disadvantage of these hardeners is also a dark color hardened their epoxy polymers.Also described is a method of obtaining hardeners, as the stage of preparation of epoxy compositions of cold hardening, which consists in mixing an aromatic amine, aliphatic amine, cresol and salicylic acid (see USSR Author's certificate 807622 priority on February 27, 1978, at the request 2583142 - prototype).Obtained by a specified method hardeners provide improved wear resistance and vibration hardened in the cold of polymers, Nala epoxy cold cured, stable during prolonged storage, providing curing, starting with -10oWith, and obtain high-strength polymer with high heat resistance capable - with the introduction of dyes and pigments - staining them in almost any color.This objective is achieved in that the pre-gain product of the interaction of aromatic di - or polyamine (And) salicylic acid (B), dissolved in the product of esterification of orthophthalic acid with a hydroxyl-containing compound (C) selected from the group comprising methyl, ethyl, oktilovom, butyl, icononly, benzyl alcohol by mixing the components in the reactor at a temperature of 5090oWith over 640 min in the ratio a: B:wt.h 98:1:1 to 10:20:70, in another reactor pre-gain product of the interaction of aliphatic di - or polyamine (G) with the same components by mixing them at a temperature of 3055oC for 325 min in the ratio of G:B:wt.h. from 96:2:2 to 4:16:80, after which the resulting interaction products based on aromatic and aliphatic di - or polyamines mix 5:5 to 5:95.Specified is confirmed by the examples.Example 1.In a reactor equipped with a heating-cooling mixer, load 54 wt. including aromatic diamine -4,4 diaminodiphenylmethane (A), 10 wt.h salicylic acid (B), dissolved in 36 wt.h. the product of esterification of orthophthalic acid, a mixture of n-butyl and benzyl alcohols butylbenzylphthalate (B), when the ratio of components a:B:=54:10:36, the temperature in the reactor is raised at a constant operating the mixer, and after reaching a temperature of 70oThe mixture was kept under stirring for 12 min at this temperature, due to ekzotermicheskie reaction begins to rise and therefore include cooling and maintain the temperature of the 70oWith 11 minutes (i.e. the total time 23 min). The resulting product is cooled to 36oC. In another reactor similar conduct a mixture of Ethylenediamine - 50 wt.h. with 9 wt.h. salicylic acid, also dissolved in 42 wt.h. benzylbutylphthalate. The process of obtaining the product of the interaction of ectothermic, so after reaching the temperature of the 36oWith over 2 min include cooling and maintaining the temperature of the 42oC, stirred for further 12 minutes After that, the product is cooled to 20oC.Next, both products were who live in the ratio of 50: 50 for 12 min at a temperature of 38oC. the thus Obtained compound then is loaded into a metal container and stored in warehouse conditions.Examples 2-14 carried out analogously to example 1. The parameters of their implementation are given in table. 1. The properties of the hardeners according to examples 1-14 in comparison with analogue and prototype, and the most common hardeners of epoxy resins cold-curing - polyethylenepolyamine (PEPA), ethylenediaminetetra-formaldehyde condensate AF are given in table. 1 and 2.Hardeners obtained by the present method, have indisputable advantages in comparison with known and has received good reviews both from foreign and domestic consumers. They are stable during storage and transportation, nelituji, non-toxic, utverjdayut epoxy resin even at moderate frosts, providing higher strength properties and heat resistance.
ClaimsThe method of obtaining hardeners epoxy cold cured, which includes operations of the mixture of aromatic and aliphatic di - or polyamines, and the introduction of salicylic acid, wherein the pre-gain product of the interaction of aromatic di-roxanadenadan connection (In), the selected groups include butyl, icononly, benzyl alcohol, by mixing the components in the reactor at a temperature of 5090oWith over 640 min in the ratio a:B:wt. hours from 98: 1: 1 to 10:20:70, in another reactor pre-gain product of the interaction of aliphatic di - or polyamine (G) with the same components by mixing them at a temperature of 3055oC for 325 min in the ratio of G: B: wt.h. from 96:2:2 to 4:16:80, after which the resulting interaction products based on aromatic and aliphatic di - or polyamines are mixed at a temperature of 1560oC for 320 min in a ratio of from 95:5 to 5:95.
SUBSTANCE: invention relates to a film-forming composition capable of electrodeposition. The film-forming composition is a product of reacting a) a polyamine which contains a primary amine group and a secondary amine group and b) an acyclic carbonate. The polyamine does not contain a polyfunctional amine which contains at least one primary or secondary amine group another functional group containing active hydrogen. The polyamine contains diethylene triamine, dipropylene triamine and/or bis-hexamethylene triamine. The acyclic carbonate contains dimethylcarbonate, diethylcarbonate, methylethylcarbonate, dipropylcarbonate, methylpropylcarbonate and/or dibutylcarbonate. The film-forming composition also contains an acrylic polymer. The acrylic polymer is obtained from ethylene-unsaturated monomers containing an epoxy group, and/or grafted copolymers of acrylic polymers and polyepoxides. Described also is a method of preparing a film-forming composition and a metal substrate partially coated with the film-forming composition. The method of preparing the film-forming composition involves mixing polyamine which contains a primary amine group and a secondary amine group and an acyclic carbonate. Mixing is done at temperature between 22°C and 100°C.
EFFECT: film-forming composition capable of electrodeposition enables to obtain a coating with good physical and mechanical properties.
19 cl, 4 tbl, 20 ex
SUBSTANCE: invention relates to a method of producing curing agents of epoxy resins and can be used to produce epoxide compositions with improved processing properties. The curing agents are obtained by reacting di- or polyepoxide compounds with nitrogen-containing compounds. The nitrogen-containing component used is a mixture which consists of one or two compounds having in their structure one or more tertiary nitrogen atoms and simultaneously one or more functional groups -NCO, -OH, -CH2OH (A) and compounds which contain, alongside the tertiary nitrogen atom, a primary or secondary amino group (B) in ratio A:B ranging from 99:1 to 70:30. Components react in the ratio of the epoxide compound to the nitrogen-containing component ranging from 90:10 to 50:50 while stirring at temperature of 40-220°C for 10-150 minutes.
EFFECT: invention increases storage stability of curing agents, improves processing properties of epoxide compositions and improves strength properties after climatic action.
2 tbl, 8 ex
SUBSTANCE: epoxide composition can be used as a saturating composition and an adhesive composition and for protective coatings of metal and concrete surfaces. The cold curing epoxide composition contains an epoxide base which includes an epoxy-diane resin having molecular weight of 340-540, an epoxy-urethane resin and a curing system which contains an aromatic amine and an imidazole-type heterocyclic compound.
EFFECT: invention enables to form a high-technology, non-toxic double-component epoxide composition, having improved strength properties and life of at least two hours, curing of the composition is characterised by a negligible exothermic effect.
6 cl, 3 tbl, 16 ex
SUBSTANCE: invention relates to a method of producing curing agents for epoxy resins for making large articles, anticorrosion coatings and other purposes. The curing agents are obtained by mixing a eutectic mixture of aromatic amines with a product of reacting an acid of general formula R2R COOH, where R is an aliphatic, cycloaliphatic or aromatic hydrocarbon moiety, R2 is a substitute -Cl, -F, -NH2, -NH-, -OH, -CH=CH-, -CH=CH2 (A) with a di- or polyamine of an aliphatic, cycloaliphatic or aromatic type, (B) and a polyatomic alcohol with containing 2-6 hyroxyls per molecule, (C) with ratio A:B:C from 70:29:1 to 20:70:10 by mixing in a medium of an ether of a di- or tricarboxylic acid and a monoatomic alcohol at temperature of 20-80°C for 10-120 minutes, with the ratio of the reaction product to the eutectic mixture of aromatic amines from 5:95 to 95:5.
EFFECT: invention enables to obtain curing agents which enable to reduce the exothermic effect when curing large-sized articles and increase strength of the obtained polymers during cavitational action of water.
2 tbl, 8 ex
SUBSTANCE: according to the first invention, an epoxide composition contains diane epoxy and an amine hardener. The above amine hardener in the composition is presented by a reaction product of polyaminoalkylphenol of formula (1) wherein n is equal to 1-7, and cyclocarbonate containing cyclocarbonate groups 18.67-25.00 wt %, epoxy oxygen 0.13-1.38 wt %, hydroxyl number 11.4-12.5 mgCoH/g on the basis of oxidised rape oil containing epoxy oxygen 5.75-6.22 wt %, hydroxyl number 13.6-14.6 mgCoH/g, iodine number 3.7-12.3 g I2/100 g. According to the second version, the epoxide composition contains diane epoxy, cyclocarbonate and an amide hardener. Cyclocarbonate in the composition is presented by above cyclocarbonate on the basis of oxidised rape oil. The above amine hardener is presented by above polyaminoalkylphenol of formula (1).
EFFECT: reducing viscosity of the epoxidic composition, prolonging its gelatination for using the composition on greater surfaces, increasing specific impact strength, breaking strength and adhesion strength.
2 cl, 4 tbl, 16 ex
SUBSTANCE: invention relates to a curable composition which can be used as an adhesive, sealant and coating material. Curable composition consists of a liquid polysulphide polymer, epoxy oligomer and an amine. Polysulphide polymer contains 8 % by weight or more thiol groups per molecule and has formula HS-(R-Sx)n-R-SH, where R is a divalent or trivalent organic group having a -O-CH2-O- bond and a branched alkylene group, average value of n is less than 10, x is an integer from 1 to 5 and average value of x is ranges 1 to 2.5. Amine used is an alicyclic tertiary amine or aromatic tertiary amine.
EFFECT: invention enables to obtain a composition having viscosity before hardening, as well as improved adhesion, hardness and hardening rate.
4 cl, 1 tbl, 12 ex
SUBSTANCE: invention relates to cold curing polymer compositions based on epoxy diane resin and can be used in composite-coupling repair of oil and oil product pipelines in various climatic conditions. Composition includes epoxy diane resin, curing agent and filler. Curing agent used is a mixture an amine curing agent with toluene sulphonic acid. Filler is 90% made up of VS quartz sand treated with aminoethylaminopropyltrimethoxy silane in amount of 1 % to 3 % of weight of curing agent.
EFFECT: invention improves quality and speed characteristics of process of adhesion of resin and filler and reduces pipeline down time by 4-6 hours after composite-coupling repair of strength of polymer composition for compression 70 kg/cm2 during 18-20 hours.
SUBSTANCE: invention relates to amine curing agents for epoxy resins. Disclosed is a curing agent for epoxy resins, containing an amine with at least one amino group of formula (I) and an amine with at least one amino group of formula (II), where X is 2-hydroxyphenyl and ratio between number of amino groups of formulae (I) and (II) ranges from 0.05 to 1.0. Technical result is disclosed curing agents have weak smell and low viscosity, harden fast with epoxy resins, without yielding turbidity during production of films with high strength and resistance.
EFFECT: disclosed formulations of epoxy resins are particularly suitable for coatings with low level of emission.
16 cl, 5 tbl, 6 ex
SUBSTANCE: invention relates to a curing agent, suitable for curing of epoxy resins, epoxy resin composition and use thereof, to a cured composition, as well as to an article. Curing agent contains an amine of a formula described below and at least one polyamine, containing at least three amine hydrogens, capable of reacting with epoxy groups. Epoxy resin composition contains at least one epoxy resin and said curing agent. Cured composition is obtained by curing epoxy composition to produce a coating. Article is obtained by applying epoxy composition on a substrate surface.
EFFECT: invention enables to obtain a curing agent with weak smell, low viscosity, which shows no tendency to drying or precipitation in air and can harden without turbidity under conditions of moisture content and low temperatures, as well as obtain even non-adhesive film with high hardness.
17 cl, 4 tbl, 22 ex