SU1620451A1 - Method of producing modified alkyd resin - Google Patents

Abstract

This invention relates to the technology of producing modified alkyd resins for protective and decorative paintwork materials. The method allows to reduce the viscosity of the resin in the synthesis process, to reduce the drying time and to improve the protective properties of coatings based on the modified alkyd resin due to the fact that when preparing a modified alkyd resin by reacting the alkyd resin and the modifier when heated, - kidney resin with an acid number of 15–35 mg KOH / i1 and a hydroxyl number of 60–160 mg KOH / g; as a modifier, an alknphenolamine resin containing 5 wt.% of nitrogen, with their mass content wearing (4-20): I respectively. Table I, 1 Il. (L

Description

The invention relates to the technology of producing modified alkyd resins for protective and decorative paintwork materials.

The chain of the invention is a reduction in the rate of increase in the viscosity of the resin during the synthesis process, a reduction in the drying time and an increase in the protective properties of coatings based on the modified alkyd resin.

To modify an alkyd resin, an “alkylphenolamine resin containing 2-3.5 wt.% Of nitrogen is used. Alkyd resins with an acid number of 15–35 mg COI / g and a hydroxyl number are used as an alkyd resin. 60-160 mg KOI / g, obtained by

the interaction of polyhydric alcohol, dibasic acid and its anhydride and various modifiers: vegetable oils or their fatty acids, synthetic fatty acids, rosin, tall oil, oil of POD or other known modifiers.

The drawing shows a graph of the conditional viscosity of the solution versus time.

In the drawing indicated:

1. - PF-231 alkyd resin (example 1);

la - alkyd resin PF-23 (prototype);

2 - PF-020 alkyd resin (example 2);

ABOUT

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Z

ate

2a - PF-20 alkyd resin (according to the type);

3 alkyd resin (Example 3); - -five

Za - alkyd resin GF (N (prototype);

4- AC-0133 alkyd resin (Example 4);

4a - alkyd resin AC-0133 (on the 10th prototype);

5- PF-020 alkyd resin (example 5) j

5a PF-020 alkyd resin (prototype) jfS

6- alkyd resin GF-01 (example b) &

6a - alkyd resin GF-01 (prototype) "

Example. Alkidy pentaite - 20 left resin for varnish PF-231, modified with tall oil, with an acid number of 15 mp KOH / g, hydroxyl of 105 mg KOH / g and a viscosity of О & a solution in xylene 135c25 (using a VZ-4 viscometer at 2010.5 ° C) is heated to 160 ° C and an alkyl feiolamine resin with a nitrogen content of 2% in an amount of 5% by weight of the alkyd resin is added, which corresponds to the alkyd ratio and alkanol-amine resins 20: 1. The reaction mass is kept for 2 h at 160 ° C. The finished resin with a viscosity of 60% solution in xylene 101c and an acid number of 35 mg KOH / g is dissolved in white spirit, a 50% solution of the resin with the addition of a desiccant is used for painting and varnishing wooden surfaces .40

PRI mme R 2. Ikidnaya pentaphthalic resin for VF-020 varnish modified with rosin and POD oil, with an acid number of 35 mg KOH / g, a hydrostatic number of 121 mg KOH / g, and in 45% of 60% - The noto solution in xylene 88c (by B8-4 viscometer at 20Ј Ј 0.5 ° C) is heated to 140 ° C and an alkylphenolamine resin with a nitrogen content of 3.5% in an amount of JQ of 20% by weight of the alkyd resin is added, which corresponds to the alkyd ratio and alkylphenolamine resins 5s 1. The reaction mass is heated to 200 ° C and stirred for 2.5 hours. The prepared mixture is in H-55

in xylene 69c bone solution and acid number 14 mg KOH / g dissolved in a solvent mixture xylene: white spirit (2: 3), 50%

resin solution with the addition of a siccative is used to paint wooden surfaces and in the manufacture of enamel PF-266.

Froze UPD glyphthalene modified glyphthalic resin for GF-01 lacquer with an acid number of 23 mg KOH / g and a hydroxyl number of 160 mg KOH / g and a viscosity of 50% resin solution in xylene 156s (using a viscometer 4 at 2QJ.O, 5 ° C) is heated to 160 ° C and an alkyl phenolamine resin is added with a nitrogen content of 3.2% in an amount of 25% by weight of the alkyd resin, which corresponds to a 4: 1 ratio of alkyd and alkylphenolamine resins. After melting the alkylphenoloamine resin, the reaction mass is stirred for 3 hours at 180 ° C. The prepared mixture with a viscosity of 50% solution in xylene 140c and acid number 10 mg KOH / g is dissolved in xylene, 42% solution of resin in xylene used in the manufacture of primer GF-0119,

EXAMPLE 4 Methyl methacrylate-modified glycaphilus alkyd resin for varnish AC-0133 with an acid number of 28 mg KOH / g, a hydroxyl number of 60 mg KOH / g, and a viscosity of 50% solution in xylene 140e (by VZ-4 viscometer at 20 ± iO, 5 ° C) is heated to 160 ° C. Alkylphenoloamine resin with nitrogen content is added. 3% in the amount of 10% by weight of the alkyd resin, which corresponds to a 10: 1 ratio of alkyd to alkylphenolamine resins. The reaction mass is kept for 1.5 hours at 165 ° C. The prepared resin with a viscosity of 50% solution in xylene 98c and an acid number of 16 mg KOH / g is dissolved in the solvent. 50% resin solution Used in the manufacture of enamel AC-182.

EXAMPLE 5 (control). An alkyd pentaphthalic resin modified with rosin for PF-020 varnish with an acid number of 11 mg KOH / g, a hydroxyl number of 180 mg COY / g, and a viscosity of a 60% solution in xylene 92c. (by VZ-4 viscometer at 2010,) is heated to 140 ° C and an alkylphenolamine resin with a nitrogen content of 2.9% in an amount of 4.5% by weight of the alkyd resin is added, which corresponds to the ratio of alkyd and alkyd-phenolamine resin- 22: 1t The reaction mass is heated to 170 ° C and stirred for 3 hours. The finished resin with a viscosity of 60% aqueous solution in xylene 88c and acidic The number 6 mg KOH / g is dissolved in a solvent mixture of xylene: white spirit (2: 3).

Example 6 (control). Alkyl glyphal resin for varnish GF-01 with an acid number of 40 mg KOH / g, a hydroxyl number of 53 mg KOH / g, and a viscosity of a 50% solution in xylene 198c the VZ-4 viscometer at 20 ± 0.5 ° C) is heated to 140 ° C and an alkylphenolamine resin with a nitrogen content of 3.3% in an amount of 28% by weight of the alkyd resin is added, which corresponds to a ratio of 3.5 to alkyd phenolamine resin : i. The reaction mass is heated to 180 ° C and stirred for 2.5 hours. The finished resin with a viscosity of a 50% strength solution in xylene 115c and an acid number of 8.5 mg KOH / g is dissolved xylene.

Claims (1)

The properties of the modified alkyd resins obtained in examples 1-6 and known methods and coatings based on them are given in the table. The invention The method of obtaining a modified, alkyd resin by reacting an alkyd resin and a modifier during characterized in that, in order to reduce the viscosity of the resin in the synthesis process, reduce the drying time and increase the protective properties of coatings based on the modified resin, an alkyd resin with an acid number of 15-35 mg KOH / g and hydroxyl number of 60-160 mg KOH / g, as the modifier is an alkylphenolamine resin containing 2-3.5% by weight of nitrogen, and their mass ratio is (4-20): I, respectively. Mustache iradpiigigischyet naat L her zhunvp 1234 Duration t v