Crude mixture for making heat-insulation articles

FIELD: chemistry.

SUBSTANCE: crude mixture for making heat-insulation articles contains, wt %: wood aggregate ground until passage through sieve N5 77.0-79.0; liquid phenol-formaldehyde resin 7.0-8.0; hydrolysed lignin 5.0-6.0; textile wastes 5.0-6.0; carboxymethyl cellulose 3.0-4.0. Articles are made by hot-pressing the mixture at pressure of 1.3-1.5 MPa and temperature of about 160C.

EFFECT: obtaining articles with low content of a toxic component - phenol-formaldehyde resin.

1 tbl

 

The invention relates to the construction materials industry, namely the composition of the raw material mixtures for the manufacture of insulation products used in the construction of walls, floors, partitions.

Famous raw mix for the production of insulation products containing, wt.%: wood filler to 58.9-77,2; phenol-formaldehyde resin 12,7-23,6; lignin 2,9-9,1; waste weaving 7,2-13,2; [1].

The objective of the invention is the reduction of content in the composition of the raw mix toxic component is a phenol-formaldehyde resin.

Technical result is achieved by the fact that the raw mix for the production of insulation products, including wood filler, phenol-formaldehyde resin, lignin, waste weaving, further comprises carboximetilzellulozu in the following ratio, wt.%: wood filler, crushed to pass through a grid No. 5, 77,0-79,0; phenol-formaldehyde resin 7,0-8,0; lignin 5,0-6,0; waste weaving 5,0-6,0; carboxymethylcellulose 3,0-4,0.

The table below shows the composition of the raw mix.

Table
ComponentsComposition, wt.%:
123
Wood filler, crushed to pass through a grid No. 577,078,079,0
Phenol-formaldehyde resin8,07,57,0
Lignin6,05,55,0
Waste weaving5,05,56,0
Carboxymethylcellulose4,03,53,0

The following is an example for insulating products offered raw mixture.

The components are metered in the desired quantities.

Prepare wood filler (shredded, obtained from waste treatment of pine, spruce), crushed it, and sieved through sieve No. 5. Wood filler and waste weaving (scraps of main and weft threads, scraps of fabric) is mixed. It is received from the mixture previously prepared mixture of the phenol-formaldehyde resin (liquid) and powdered fillers - hydrolytic lignin and carboxymethylcellulose. All components are thoroughly mixed so that the resin impregnated wood filler and a waste of weaving. The mixture is subjected to hot pressing at a pressure of 1.3-1.5 MPa and a temperature of ~160C. Under the influence of the temperature of the resin cures. Solidified product was incubated for 3-5 days at room temperature.

The source of information

1. SU # 1131856, 1984.

Raw mix for the production of insulation products, including wood filler, phenol-formaldehyde resin, lignin, waste weaving, characterized in that it further comprises carboxymethylcellulose in the following ratio, wt.%: wood filler, crushed to pass through a grid No. 5, 77,0-79,0; phenol-formaldehyde resin 7,0-8,0; lignin 5,0-6,0; waste weaving 5,0-6,0; carboxymethylcellulose 3,0-4,0.



 

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