SU1213047A1 - Method of preparing polymeric composition - Google Patents

Description

one

The invention relates to polymer chemistry and can be used to obtain polymer-concrete, mastic, adhesives and wood-based materials (plates) with high physicomechanical properties and reduced toxicity on the basis of urea formaldehyde resins.

The purpose of the invention is to increase the chemical resistance of the composition.

The polymer composition is prepared. in the following way.

Fillers and sulfuric sludge in the form of fine powder are loaded into the concrete mixer, mixed for 1-2 minutes, then urea resin is added and all components of the mixture are mixed further until a homogeneous mass is obtained within 3-4 minutes. The mixture is poured into molds and cured for 12 hours.

Sulfuric sludge has the following composition, wt.%:

Claydite

sand 6V, 2 60.0 58.0 56.0 50.0 40

Quartz sand

eight

Sulfur Mud

Urea-formaldehyde resin KFZh 30

30 30 30 30 30 30 30 30 30 0.8 2.0 .4 6 12 22 32 42 52 70

0.9-1.1 0.08-0.10 0.06-0.08

0.03-0.05 Else

20

Table 1 shows examples of compositions with different content of sulfur sludge, made by the proposed method, in Table 2 - the results of tests and physical and mechanical properties of the compositions obtained by the proposed and known methods.

The gelation time of compositions with a sulfur sludge content of 65 wt.% At 7 minutes, and at a content of 70 wt.%, 4 minutes. Formaldehyde content in the composition with a sulfur sludge content of 60 wt.%

20

ten

Indicators

Content of the competitor, Mac.Zt by example

iLlIlIEEIEFIPn

strength after 10 days, MPa.

Flexural 4.73 4.93 6.87 6.93 .7.00 7.20 7.60 8.00 8.20 8.70, Fasten 15.00 17.30 20.0 23.10 26.70 27, 1 28.40 29.10 30, AOR 32.10

Strength through -

 30 days, MPa.

Flexural 6.9 7.4 7.7 7.9 8.0 8.2 8.5 9.7 10.9 12. under compression 27.0 27.9 30.1 31.3 33.7 34.1 35.0 37.0 40.3 42.0

Water absorption

after 10 days,

hardening, Z.

per day for 10 days

Kistopotobleniya after 10 days of hardening, X

per day for 10 days

Alkaline absorption after 10 days of solidification, Z

 per day for 10 days

4.2 3.9 3.5 2.7 2.7 2.5 2.0 1.1 0.7 0.7 0.61

4.8 4.5 4.4 4, 2 3.8 2.1 1.3 1.0 0.8 0.8 0.65

4.7 4.6 4.4 4.3 4.1 3.97 3.84 3.56 3.38 2.0

Compiled by G.Stepanov Editor A.Sabo Tehred T.Tulik Proofreader A.Obruchar

Order 725/36 Circulation 471. Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5,

Branch PPP Patent, Uzhgorod, Proektna St., 4

table 2

ten

Known method

11.0 55.0

0.5

4.7

5.2

Claims (1)

METHOD FOR PREPARING A POLYMER COMPOSITION by combining urea-formaldehyde resin with fillers, characterized in that, in order to increase the chemical resistance of the composition, finely dispersed sulfur slurry with a sulfur content of 73-74 wt.% Or a mixture of silica sand previously obtained before being combined with the resin is used , expanded clay sand and sludge, at a mass ratio in the mixture of 8: 10.0 - 61.2: 10.8 - 52.0, in the following ratio of components in the composition, wt.%: Urea-formaldehyde resin 30-35 Filler Else eleven