SU627145A1 - Foam plastic obtaining method - Google Patents

Description

This invention relates to a composition for making foams based on. Phenol-formaldehyde resin mixtures of resolver type and urea-formaldehyde resin used for heat insulation of underground heat pipelines and for warming hot surfaces. A known composition for the preparation of a peioplast, comprising a resole-type phenol-formaldehyde resin, aluminum powder, an acidic curing catalyst, a 15% hydroxylamine hydrochloride solution in dihydric or trihydric alcohols, and a volcanic ash fl. The preparation of a foam based on this composition is carried out by mixing the components and pouring the mixture into the mold. Before being poured, a 15% solution of hydroxylamine in two- or three-atom alcohols and up to 5% volcanic ash is introduced into the mixture into the mixture, and the rest of the volcanic ash is injected into the form in layers or under pressure of 0.5-1.0 kgf / cm On the basis of taco K. COMPOSITIONS get foam with a compressive strength of not more than 5 kgf / cm and heat resistance not higher than 180 b. Closest to the technical nature of the invention is a known composition for the preparation of foam, including phenol-formaldehyde resin of the resole type, urea-formaldehyde resin, iirbaepxHocTHO active substance, aluminum powder, aluminum powder, solution of the benzene sulfonic acid in the ethylene glycol, 2, iirbaepxHO, and the same time, the settings apply to the settings, there is no time for the settings, there is no reason for the settings, there is no reason for the settings, there is no time for the settings, there is no time for the settings, there is no time for the settings, there is no reason for the settings, I’m too slow, I’m not allowed to set, I’m not allowed to use it. . The purpose of the invention is to increase the heat resistance and increase the mechanical strength of the foam. This goal is achieved by the fact that a composition comprising a resole-type phenol-formaldehyde resin, a urea-formaldehyde resin, a surfactant, aluminum powder, orthophosphoric acid, and a 70% solution of benzenesulfonic acid in ethylene glycol, additionally contains ethyl silicate in the following ratio of compounds and ethylene glycol, in the following ratio of benzenesulfonic acid in ethylene glycol, additionally contains ethyl silicate in the following ratio of compo- nents, in the following ratio of benzenesulfonic acid in ethylene glycol, it additionally contains ethyl silicate in the following ratio of compo nents, in addition to ethylene glycol, in the following ratio of benzenesulfonic acid in ethylene glycol, it also contains ethyl silicate in the following ratio of compo nents, in addition to ethylene glycol, in the following ratio of benzenesulfonic acid in glycol; Phenol formaldehyde resin rezol type 70.0-80.0 Urea formaldehyde resin 20.0-30.0 8 Surfactant 3.0 / 5/0 Aluminum powder 0.5-0.7 Orthophosphoric acid 2.0-6.0 70 % solution of benzols fokislo .ty in etilenglikole18, 0-22,0 Etilsilikat3 5, 0 Ethyl silicate introduced into the binder immediately before the foaming process. Three compositions are prepared for the preparation of foam plastic, the formulations of which are listed in Table 1. Tyblitz 1.

Phenol formaldehyde resin

Urea formaldehyde resin

Surfactant OP-7

Aluminum powder

Phosphoric acid 100% on

Curing catalyst (solution of benzenesulfonic acid in ethylene glycol at a ratio by volume)

Ethyl silicate OP-7 - a mixture of polyethylene glycol dialkylpheno foam is prepared as follows. Resol-type phenol-formaldehyde resin, urea-formaldehyde resin, Ethyl silicate - 40, OP-7, aluminum powder are mixed to obtain a homogeneous mass at a temperature of 15-25 seconds. A solution of benzenesulfonic acid in ethylene glycol is introduced into the resulting mixture, technical orthophosphoric acid is mixed thoroughly for 0.5-1.0 min at the same temperature.

Bulk weight, kg / m

Strength at tic bending, kGS / cm

Heat resistance, C

Compressive strength, kgf / cm

4.0

20

18 3

22

five

100

110

130

10.9 15.7

13.1 220 200 210

11.4 16.1

Claims (3)

1 ", 0 oleo ethers of mono and Zy catches (all components are taken at one of the limits specified in Table 1). The resulting mixture is poured into a mold, in ko. In 5-10 minutes, the process of free foaming of the composition takes place. The test results of the well-known foam (FL-3) and about the foam foam: that of the proposed composition is given in the table 2S4S. Table 2 5627145 Thus, on the basis of the composition of the invention, foam is obtained with high mechanical strength and high heat resistance. Claims of the Composition for the preparation of foam, including rezol phenol-formaldehyde resin, urea-aldehyde resin, surfactant, aluminum powder, orthophosphoric acid and a 70% solution of benzenesulfonic acid in ethylene glycol / in the form of a glycerol / 70% ethylene glycol solution of the glycol / /, is applied to the foam and / or phosphoric acid, and a 70% strength solution of the benzenesulfonic acid / glycerol / alumina gum / alumina is applied to the foam. , it additionally; Stock ethyl ethyl silicate in the following ratio of components, parts by weight; in 1kl pp sv FL of FENOL-formaldehyde 70.0-80.0 resole of the resole type Monevinformaldehyde20, 0-30.0 per resin Surface-active 3.0-5.0 substance 0.5-0.7 Aluminum powder 2.0-6 , 0 Orthophosphoric acid 70% solution of benzenesulfonic acid in ethylene18, 0-22.0 glycol 3.0-7.0 Ethyl silicate Data sources taken in. mania during examination: 1, Application No. 2356423 / 23-05, C 08/19/08, 1976, according to which the decision to issue the author's deed is issued. 2. Galaktionov V.A., Belov Yu.N. FL soldering foam plastic FL-1 2 and FL- 3. L ,, Izd.LDNTP, s, 3-7.