SU559937A1 - Composition for thermal insulation materials - Google Patents

Description

one

The invention relates to heat insulating materials and can be used in the practice of mining and mine rescue in building structures under emergency conditions for isolating a fire, especially in hard-to-reach places, and can also be used in building practice for thermal insulation of various devices and structures.

Compositions for the production of thermal insulation products are known, consisting of expanded perlite in combination with various bonding materials: epoxy resin, coumarone, urea formaldehyde, phenol formaldehyde and other resins 1-2.

Closest to the proposed raw meal is a composition containing urea-formaldehyde resin and expanded perlite 3.

Known mass consists of 90-60 weight. % perlite and 30-40 weight. % resin MF.

However, this mass has a high volumetric weight (400-450 kg / m) and low mechanical strength (compressive strength 10-18 kgf / cm).

The purpose of the invention is to create a raw mix for the production of heat-insulated products based on perlite and urea-formaldehyde resin having a lower

bulk weight and increased mechanical strength.

This is achieved by the fact that urea-formaldehydeperlpt additionally contains pulser acid and diethylene glycol in the following ratio of components, weight. h .: Urea formaldehyde

resin brand MFM50-70

Diethlen glycol 5-7

Pulverbakelite5-7

Expanded perlite

sand20-40

Hardener 5-6

For the resulting heat insulating material, a mixture of components (parts by weight) is prepared according to the following recipes: Example 1.

Resin MFPM50

Diethylene glycol7

Pulverbakelite7

Expanded perlite

sand40

Oxalic acid, 10%

solution5

When Mer 2.

Resin MFFM.60

Dpatplenglikol5,5

Pulverbakelite5,5

Claims (3)

Expanded perlite sand30 Oxalic acid, 10% -sized 5.3 solution Example 3. Resin MFPM 70 Diethylene glycol Pulverbakelite Expanded perlite sand 20 Oxalic acid, 10% solution Raw mix for heat-insulating products is produced by mechanical mixing of the initial components under normal conditions The mixture is cured in forms at 160-180 ° C for 120-150 minutes. The obtained samples of heat insulating blocks have a bulk weight of 300-380 kg / m, the compressive strength is 24-32 kgf / cm. The table shows the properties of the proposed mixtures. 5 5 5 g 10 15 20 25 30 As can be seen from the above data, the hardened raw material mixture for the production of heat insulating products has a smaller bulk weight compared to urea formaldehyde perlite, while the strength properties increase by a factor of 2-3. Composition for thermal insulating materials, containing urea-formaldehyde resin, expanded perlite and hardener, characterized in that, in order to increase strength and decrease bulk density, it additionally contains pulverbakelite and diethylene glycol in the following ratio of components, weight. h .: Urea aldehyde resin of MFPM50-70 grade Diethylene glycol 5-7 Pulverbakelite 5-7 Expanded perlitic sand 20-40 Hardener 5-6 Information sources taken into account during the examination: 1.Avt. St. No. 183663, CL.2 C 04B 43/00, 1960. 2. Avt. St. No. 285584, cl. C 04B 43/02, 1968. 3.Zhurkov A.V. Materials and products based on expanded perlite M., Stroyizdat, 1972, p. 38 (prototype).