SU883084A1 - Method of preparing composition for making phenolformaldehyde porous plastic material - Google Patents

Description

36 The above chain is achieved by preparing the composition for phenopformaldehyde foam by introducing it into the phenopformaldehyde resin With the stirring of the surface-active substance, the co-agent, 0.1-2 O weight per 10 weight parts. sms "s nitrogen-containing tetrafnichional bloc of nomiMepa signsy ethylene and propylene and an acid hardener followed by the introduction of expanded clay, phenol formaldehyde resin, preheated to 30-4 ° C, nitrogen-containing tetra Functionalized (H1 block oximer oxycar resin), nitric containing tetra is added, nitrogen-containing tetra is introduced Functional (H1 block oximer oxyhydrate), nitrogenous tetra is applied. for 1.5-2 hours, cooled to 20 ° C and then the remaining components are injected. The additive introduced is a liquid product of the copolymerization of ethylene oxide and propylene, produced in the presence of initiators, for example ethidend iamine, benzo-supafamide, diethylenetetramine, methyldiethanolamine, etc. Any known components used in such compositions can be used as a surfactant, gassing and acidic hardener.The introduction of an additive in this way allows you to purposefully regulate the process of structuring the foaming composition, which gives the ability to obtain material with a uniform structure and enhanced physico-mechanical and thermal performance indices while reducing resin consumption s. The introduction of N-containing tetrafunctional ionic oxopolymers of ethylene oxide K propylene in the proposed amount has a positive effect on the foaming process 1 by increasing the heat release during curing of the phenol formaldehyde binder in the presence of acids, which also eliminates the need for heating of the forms and the filler. In addition, an increase in heat generation causes an increase in pressure and an improvement in the conditions of foam distribution in the intergranular space of the filler, which, 4 in turn, alters the principle of combining the porous binder with the filler. An increase in pressure and temperature with the introduction of nitrogen-containing tetrafunctional block copolymers of ethylene and propylene oxides leads to an increase in the adhesion of the foam to the surface of the filler, while simultaneously increasing the strength of the film of the porous binder by increasing the degree of branching structure. This fact makes it possible to expand the scope of the use of such materials as a heat insulating layer in Lightweight multilayer structures without: applied adhesive layers. The foamed composition prepared by the proposed method is molded to (% styrofoam foam by pouring into the mold or onto a conveyor, combining vosp; (weldable composition with filler. Forming is carried out without additional heating until the materials are completely cured. Proposed unfilled foams of different compositions and their main technological and physico-mechanical characteristics were determined. All tests were carried out in accordance with standard methods The compositions of the compositions and the results of the tests are given in Table 1tc 2. As can be seen from the examples, the foams produced by the proposed method have several advantages.In the process of forming the structure of the material, the time for structuring the foam increases and the formability of the foam improves. Correspondingly, the conductivity of the finished material decreases by 1025%, the strength increases by 7-2% while reducing the consumption of the polymer composition by 1.5-2 times. The proposed method allows to significantly improve the structure of the material. Moreover, a positive effect is observed in the manufacture of both pure and filled foams.

Table 1

Component content, parts by weight:

fenopformaldepshna resin type

surfactant

gazoooobrazovatel (AB powder or methylenechloride)

acid hardener

Additive: latex

The product of copolymerization ethylene oxide and propylene in the presence of

ethylenediamine beveosulfamide diethylenetetramine methyldiethanolamine:

Porous filler (expanded clay)

The temperature to which heated odol.S

The sequence of the introduction of comHeirroB

Exposure time of mixed resin with additive, h

The temperature at which the mixture of resin with the additive will withstand.

The mixture by the introduction of the remaining komponetov- cooled to

Time of foam structuring, min. Formability of foam, m / min Binder consumption per 1 m, kg

Volumetric mass of x position, kg / m

Heat conductivity coefficient, kcal

Mhg

x)

Specific compressive strength

. :

Adhesive strength, kgf / cm

Predles kenyy

Famous

 1OO 1OO 1OO 10O lOO b 3 5 S 4 5

10 6.5 1.5 1.5 1

1 25 ZO 25 ZO 26 25

. Yu 0, 1

ten

ten

15 2O 2O

315 31O ZO5 305 315 315

thirty

35 35 4O Offered

Known

1.5

ZO3535 40 20

table 2

2,52,44,04,74,95,4

35О36О4ОО44О 48О52О

6O6O454O37 32

37537636035О343337

O, O78O, O78O, 058O, 058O, O57 O, O57

ZO354O465O56

2,52,63,8.3.53,73,8

Specific tensile strength

Specific Flexural Strength

Claims (2)

In order to eliminate the influence of the bulk density on the strength of the composite, a specific strength criterion was introduced, which is a ratio of strength to bulk weight (X10). The invention The method of preparing a composition for the preparation of phenol-formaldehyde foam by introducing into the phenol-formaldehyde resin with the mixing of a surfactant, a blowing agent, 0.1-20 parts by weight on 1oo weight.h. resins of nitrogen-containing tetrafunctional block copolymer of ethylene oxides and propylene and acid hardener, followed by the introduction of expanded clay, characterized in that, in order to improve the strength properties, reduce technological shrinkage and increase the thermal continuation of the table. 2 10 12 1415 16.2 17.7 25 23 2832 33, i 33.8 resistance of the final product, the phenol-formaldehyde resin is preheated to 30-4 ° C, nitrogen-containing tetra-functional block copolymer of ethylene and propylene oxides is introduced, maintained at 30 ° C for 1.5-2 hours, cooled to and then the remaining components are introduced. Sources of information taken into account in the examination 1. Patent CmAJJb 36277О6, cl. 260-2.5, pub. 1973. 2. USSR author's certificate according to application No. 2720929 / 23-05, КЛ.СО83- 9/06,1979 (prototype).