SU704668A1 - Method of making thermostable coating - Google Patents

Description

(54) METHOD FOR COATING TERM.bsTOYKOGO kanizun CIM agent, applying silicone-based polymer solution in an organic solvent otverzhdeni1Ch coating at room temperature, as vuLkanyeugatsego agent is 2,4-toluene diisocyanate 102T, and as the silicone polymer - arilatsiloksanovy block copolymer of general formula -Ag-O-C-Av - fc-01 Ar o-ei-K.;. where Ar and Ar are an aromatic diradical,. . R is an aliphatic or aromatic radical. X 10-50, at 20-400, p 2-3, use it in a mixture with epoxy resin in the amount of 20-50 Maj3., Per 100 mash. copolymer block. In the case of a surface, arylatesilox is applied a new block copolymer of the specified formula - - -; - -, ....,. . , ...-,, .. .. Example 1. On a sandblasted carbon steel plate nano with a brush, the product 102T. After 10 minutes, a 15% pacTisop arylatesilox new block copolymer containing 15 wt. Hours is applied. ED-5 epoxy resin and then a 20% solution of arylatesiloxane rubber in chloroform. Curing of the coatings is carried out at a temperature of 20 s for 5 hours. After 3-5 days, the strength of attachment of the coating of the DRD for tearing and peeling and for a thermos flask at a temperature is determined. The test results are shown in the table ... ... Example 2. On plate processing gannunz just as described in at

The effect of the surface treatment of metal on the nature of the destruction of the samples during separation and peeling, at least 1, is applied to a 15% arylate silox solution of a new block copolymer containing 50 wt.h. ED-5 epoxy resin and then a 20% solution of aryl siloxane rubber in a ternary solvent mixture consisting of 62 wt.h. toluene, 12 mA. ethyl acetate and 26 wt. acetone. Curing Coating and fixing strength is carried out as described in Example 1. The results are shown in the table. Example 3. (control). A 15% strength solution of an arylate-siloxane block-copolymer containing 20 parts by weight is deposited on the platelet without a sublayer of the eocyanate-containing i product. ED-5 epoxy resin in chloroform and a ternary solvent mixture followed by the application of a 20% solution of arylatesiloxane rubber in the same solvent. The curing of the coating and the determination of the fastening strength are carried out as in Example 1. The results are shown in the table. . . Example 4 (control by the selected prototype). On the plate, treated in the same way as in example 1, a coating of 50% solution in gasoline 100 wt.h. low molecular weight siloxane rubber SKTN-1 and 4 wt.h. methyltriacetate siloxane. The coatings are cured at 20 ° C and after 15 days they determine the strength of the coating fastening for peeling and peeling. The test results are shown: in the table.

102 T

Chloroform

one.

Triple mixture 102 T

Chloroform without a mixture

102

Petrol

four.

102 T

Chloroform

five.

A-adhesive nature of the destruction of samples MA (material from the metal)

K-cohesive nature of the image of images

+ heat resistance is good

Claims (2)

+ Target (control). On a plate treated in the same way as in Example 1, a 15% solution of an arylate-siloxane block copolymer containing 15 wt.h. ED-5 epoxy resin per 100 mph. rubber, and then a 20% solution of arylatesiloxane rubber in chloroform. The coatings are cured and the adhesion is determined as described in Example 1. The results are shown in the table. Example 6 (control). On a plate treated in the same way as in Example 1, a 15% solution of aryl-siloxane block copolymer containing 55 wt.h. ED-5 epoxy resin per 100 mph. rubber in chloroform. The curing of the coating is carried out as described in Example 1. Peeling is observed (there is no coalescence) between the layers containing and not containing epoxy resin. . . In examples 1, 2, the cohesive nature of the destruction of the specimens is observed, which indicates a high fixing strength, in which the quantitative indicator of the fixing strength is 20–30 kg / s with a discharge of 3–4 kg / s - during exfoliation. The true indicator cannot be determined, since adhesion is significantly higher than cohesion. In the 3, 4, 5 control examples given above, the adhesive nature of the destruction of the specimens is observed. The strength of the fastening is only 4-5 kg / cm with tearing and 0.4-0.6 kg / cm with peeling. Thus, only when applying a solution of an acrylate-iloxane block copolymer containing 20–50 May, h. epoxy resin on May 100. rubber before applying a solution of arylatesiloxane rubber on a substrate treated with an isocyanate-containing product, a heat-resistant coating with high strength of attachment is obtained. The invention method of obtaining a heat-resistant coating by layer-by-layer deposition of a curing agent on a metal substrate, then a silicone polymer and subsequent curing at room temperature, characterized in that, in order to increase adhesion, 2,4-toluene diisocyanate is used as a curing agent, and as a silicone polymer arylatesiloxane block copolymer of the general formula:,. . 0-AV - 0- & Ar-C-o A4o-si-Ti j where Ar n Ar is an aromatic birade. . R is an aliphatic or aromatic radical, 10-50, at 20-400, p 2-3 in mixture with epoxy resin, taken in amount of 20-50 wt.h. per 100 wt.h. and the resulting surface is coated with an arylatesiloxane loxopolymer of the specified formula. . Sources of information, rintye taken into account in the examination 1. Kardashchev D. A. Synthetic Lei. M., Himi / 1968, p. 191. 2.Labutin and. L., et al. Anticorrosive and sealing materials based on liquid rubbers. ML, Himi, 1966, p. 163 (prototype).