SU910710A1 - Composition for removing varnish and paint coatings - Google Patents

Description

The invention relates to the paint industry of the succulent industry, in particular to compositions for removing old paint coatings without the use of mechanical cleaning means. A known composition for removing coatings, including methylene chloride, the co-solvent is formalglycol, xylene, the evaporation inhibitor is paraffin, the thickener is perchlorovinyl resin, the disintegrant is acetic acid tl. Known composition, including methylene chloride, co-solvent - ethyl alcohol, paraffin, thickener - thixotropic paste of hydrogenated castor oil, modified with polyamide resin, and chloroparayin, emulsifier OP-7, OP-10, baking powder, liquid soap, 2, Known composition, including methane, a mixture of toluene and an aromatic amine), emulsifier, thickener and retarding agent - casein and paraffin, baking powder, water 13. These compositions have insufficient removal efficiency of coatings and increased toxicity. The closest to the invention to the technical essence and the achieved result is a composition for the removal of paint coatings, including methylene chloride (main solvent), methanol, diethylene glycol (cosolvents), thickener, monomethyl phosphate acid and water 14. The composition removes 100% of the coating based on various film-forming agents, however, the removal time of the coatings is 40-80 minutes and the composition is rather toxic due to the presence of methanol, diethylene glycol. The aim of the invention is to improve; however, the effectiveness of the composition and the reduction of its toxicity. . The goal is achieved by the fact that the composition (to remove paint and varnish coatings, 39 which include methyl and co-solvents, contains formaldehyde dimethyl acetal as a co-solvent and additionally a surfactant in the following ratio of components, May. methylal) is a flammable liquid with, 3 ° C obtained by any method or by isolation of a light boiling fraction of water-insoluble by-products in the production of f, (-dimethyl-1,3 dioxane. The composition may additionally contain a disintegrant - organic acid (formic, acetic, propionic), a corrosion inhibitor (hydroquinone thickener (paste of hydrogenated castor oil, modified with polyamide resin, and chloroparaffin or organophilic bentonite and chloroparaffin), an evaporation inhibitor (paraffin). 4 As an emulsifier, the composition contains various non-ionic surfactants: extilated alkylphenols (OP-7, OP-S), e alcohols (SYNTANOL) ethoxylated higher acids (stiaroks-6), polyethylene esters of fatty acid esters of polyhydric alcohols (ether pentaeritritstearata polyethylene, PP-10 formulation). The formulation is prepared by mixing all the incoming components at 20 ± 2 ° C. Apply the composition (thickened) on large products with a brush or spatula. In the case where the composition is liquid, the removal of coatings is carried out in baths. The content of the components of the composition is given in table. 1. In table. Figure 2 shows the comparative efficacy, toxicity, and flammability of the coating removal compositions. As follows from the cited data, the proposed composition has an increased efficacy of action and reduced toxicity while maintaining incombustibility. Table 1

Content Component

100

100

itO

five

1 o

510

100

100

100

100

100 kQ 20 30

10 30

0.5 components, May. h. Component i b) acetic c) propioned Water Hydroquinone corrosion inhibitor Thickener Evaporation inhibitor Type of coating to be removed, properties

Soil AK-070, 2 layers Enamel EP-140, 2 layers Enamel ML-165, 2 layers Primer VL-02, 1 with Enamel EP-755, layers Enamel EP-53, 2 layers

Primer EP-00-10, 2 layers

Electrical insulation coating

MPC r.z. (calc.) Flammability

kQkQ

101015

TsyitO

101515

“W

iiO

20

20

 , 50

90

t Q50 08080

281.8 753.8 1172.7 tB.O and, 5 does not ignite g Extension of table 1 Content of components, m.ch. i: zri: i: i: ri: 7 0 -, 10 - - - - ep JU - - -5-- Table 2 Time of destruction of coating, min, according to the composition of the proposed well-known j TTT 7. The invention has a paint remover composition that includes methylene chloride and a co-solvent, which is also distinguished by the fact that, in order to increase the composition efficiency and reduce its toxicity, it contains formaldehyde dimethyl acetal as a co-solvent and additionally emu gator in the following ratio of components, May. h .: Methylene chloride 100 O8 Formaldbgiddimetyl acetalB-O Emulsifier 0.5-5.0 Sources of information taken into account during the examination 1. Smyka SP-6 TU b-Yu-bSh-. . USSR certificate of authority If 517618, kp. C 09 D 9/0, 197. 3. Patent Poland W 59061, cl. From 09 Oh ,, publish. 1970. A. US Patent No. 314722D, cl. 252-143, publ 1. 1964 (prototype).

Claims (1)

Claim A composition for removing paint coatings, including methylene chloride and a co-solvent, characterized in that, in order to increase the effectiveness of the composition and reduce its toxicity, it contains formaldehyde dimethyl acetal and additionally an emulsifier as a co-solvent in the following component ratios, May. hours: * Methylene chloride 100 Formaldehyde Dimethyl Acetal 5 “40 Emulsifier 0.5-5.0