FIELD: woodworking industry.
SUBSTANCE: manufacturing method comprises loading phenol, loading water, loading the first portion of caustic soda, loading formalin and loading the second portion of caustic soda. At that, formalin before loading to the reaction mixture and adding the second portion of caustic soda is mixed with paraformaldehyde solution followed by neutralisation of the mixture with granulated caustic soda.
EFFECT: reduction of amount of free volatiles, reduction of alkalinity, and increase in the degree of cure of these oligomers, improvement of qualitative characteristics of the plywood and chipboard obtained on their basis.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING UREA-FORMALDEHYDE OLIGOMER | 2013 |
|
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| METHOD OF PRODUCING CARBAMIDE-FORMALDEHYDE RESIN | 2024 |
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| METHOD OF PRODUCING FORMALDEHYDE-CONTAINING RESIN WITH LOW EMISSION OF FORMALDEHYDE AND FUNCTIONAL MATERIALS BASED ON SAID RESIN | 2008 |
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RU2413737C2 |
