METHOD OF OBTAINING WATER EPOXIDE DISPERSION Russian patent published in 2009 - IPC C09D163/00 C09D5/02 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining water epoxide dispersion, used for impregnating concrete and wooden constructions in order to ensure their water-proofness, obtain anti-corrosion, decorative, electro-insulating coatings, as well as for impregnation of fabrics and for other purposes. Method consists in the following: epoxide component (A) and aliphatic difunctional compound (B) are brought into interaction with ratio A:B from 95:5 to 30:70 at temperature 50÷90°C during 1÷5 hours. Reaction is carried out in presence of tertiary amine or dimethylamine catalyst in amount from 0.01 to 5% of reagents weight until content of epoxide groups in component A decreases to from 5 to 70% of initial quantity. Epoxide ingredient represents mixture of cycloaliphatic or aliphatic resin with aromatic epoxide resin, containing ≥ 2 epoxide groups in molecule, with their ratio 3:97 to 97:3. Aliphatic difunctional compound represents compound selected from group including acid, alcohol, oxyacid. To obtained product of interaction initial component (A) is added with their ratio from 5:95 to 95:5. Further, mixture is mixed during 5÷25 minutes, four equal portions of distilled water are added with intervals from 5 to 75 minutes, and concentration of main substance is brought to 10÷70%.

EFFECT: obtaining stable water epoxide dispersion, containing product of interaction with residual epoxide groups, in absence of solvents and surface-active substances.

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