SU1052529A1 - Varnish - Google Patents

Abstract

VARNISH, including a copolymer of butyl methacrylate and methacrylic acid, melamine formaldehyde resin, butyl acetate, ethyl cellosolve and butyl, were used in order to increase the stability of the lacquer during storage, it also contains an aromatic compound selected from the group containing benzo benzene. , benzophenone, acetophenone, Michlera ketone, methyl and isobutyl ester of benzoin, methyl benzyl ketone, NRI following component ratio, in May.%: Butyl methacrylate and methacrylic acid copolymer 16-24 Melamine formaldehyde idnsSh smola6-12. Butyl acetate 30-40 ethylcellulose 18-25 i Butyl alcohol 7-13 (L Aromatic compound selected from the group including benzoin, benzophenone, acetophenone, Michler's ketone, methyl benzoi and isobutyl ester; on, methyl benzyl ketone 1-5 el N5 SL WITH

Description

The invention relates to quick-fix coating varnishes and can be used in varnishing colorful prints on metals in the manufacture of containers of fish and meat canned food, household chemicals, gauges, ddtskih. toys and others. It is known on the basis of acrylic copolymer modified with epoxy resin, Cl3. . The closest in technical terms (the essence and the achieved result to the proposed is: lacquer, including a copolymer of butyl methacrylate and me 7 acrylic acid, chalk aminoform, aldehyde resin, butyl acetate, ethyl cellosolve and butyl alcohol NW} The disadvantages of the known compounds are The purpose of the invention is to increase the stability of the varnish during storage. The goal is achieved by the fact that the varnish, including a copolymer, butyl methacrylate and methacrylic acid, melminobenzoyl resin, butylacetate, etiltseldozolv and butyl alcohol, comprises by the additional aromatic compound sps rannoe from the group vkyyuchavdey benzoyl benzophenone, acetophenone, Michle ra ketone, and methyl isobutyl ether, benzoin metiloenzilketon, when the following relation of components, May. The copolymer of butyl methacrylate and 16 IU acid takrilovoy 24 Melai formaldehyde resin 6-12 Butyl acetate 30-40 Ethyl cellosolve 18-25 Butyl alcohol 7 13 Aromatic compound selected from grupbal, including benzoin, benzophenone, acetophenone, Michler's ketbn, methyl And isobutyl Benzoin ester, methylbenzylketone1-5 As a copolymer of butyl methacrylate and Methacryloic acid, use is made of BMK-5 resin, and K-421-02 resin as melamine-formaldehyde resin. Varnish is prepared as follows. B: Reactor, op load solvents and, under vigorous stirring and a temperature of 65--70 ° C, a solution of 10mCm.J.J. After the complete dissolution of the resins, the aromatic compound is introduced,; after 20 min stirring. Peratura is drilled to 25-30c and the finished varnish is poured into the container. The coating ak was applied in an ad-hoc manner on a small-format varnish on a Rover machine at a speed of 2000 rpm. Coating thickness - 6-7 microns. Table 1 presents examples of specific implementation, illustrating the invention, and in table 2, the properties of varnish and coatings on its basis. . Table 1

2221231624

812712b

3734303834

1922242218

138111013

1 ----- 3 --- 4 ---- 223 17222317

9 118711

33 4037,33036

25 221923,723

7 913118

- 0,7 --- 5, 3 Components according to the invention

gtrip j 11} Tz.

Methyl YOY Ether Benzoin Isobutyl Ester Benzoin Methyl BeyZILketon Solven Mr. Aft

131 126 139 118 142 140 120

after year

storage of varnish. / 142 137 147 126 147 152 135

Gloss film varnish,

;;%: /; -.;; ;

80 83 78 83 79 76 83

source

75 79 74 78. 77 72 78

85 87 85 90 4 86 89

84 87 88 81 85 83 87

50 50 50 50 50 50 50

,

50 50 50 50 50 50 50

; initial varnish 0.8 0.9 0.8 0.8 0.8 0.8 0.9

Continuation of table 1

Examples

checklists

eight

. , 1table2

0.9 0.8 0.8 0.9 0.8 after years of storage of varnish O, 8 O, 8 0.8 0.9 0.8 Resistance of coating, t mark

   The test of the lanes in examples no. 8-10 was carried out after keeping them in a thermostat at 90 ° C for 4 hours, which corresponds to the conditions of storage of varnishes

under normal conditions throughout the year,

Conditional viscosity is determined according to. As can be seen from Table 2, varnish by means of ISO-GOST 8420-74, the gloss of the film —the confluence has a stable viscosity at

p6 TU 29-02-873-79, 4 „; strength storage in the year. Gloss, phyiprk impact according to GOST 4765-73, relative mechanical characteristics and

body hardness, according to GOST 5233-67, water resistance of coatings on the basis Water-resistance of Olre.i. on TU 29-02--, ve of this varnish also did not change 333-79 p., 4.7. after stargazing, they are stored for a year at 120 ° C for 2 hours, neither.

Continuation of table 2

0.6 O, 8 O, 8 O, 8 O, 9- 0.8

Claims (1)

LAC, including a copolymer of butyl methacrylate and methacrylic acid, melamine formaldehyde resin, butyl acetate, ethyl cellosolve and butyl alcohol, characterized in that, in order to increase the stability of the lacquer during storage, it additionally contains an aromatic compound selected from the group consisting of benzoin, benzophenone ¹ , acetone , Michler's ketone, methyl and isobutyl. benzoin ester, methylbenzyl ketone, Nri the following ratio of components, May.%: The copolymer of butyl methacrylate and methacrylic acid 16-24 Melamine formaldehyde resin 6-12 Butyl acetate 30-40 Ethyl cellosolve 18-25 Butyl alcohol 7-13 An aromatic compound selected from the group consisting of benzoin, benzophenone, acetophenone, Michler ketone, benzoin methyl and isobutyl ether, methylbenzyl ketone 1-5 _na , SUl 05252 "О> f 1052529 2 fish and household appliances, acrylic