FIELD: chemistry.
SUBSTANCE: invention relates to additives for organic binder based on formaldehyde resins, used in production of heat and sound insulation boards or other building structures from inorganic fibre (cotton wool). Additive is a direct aqueous complex emulsion containing, wt. %: 50 silicone oil, 40-50 acryl-styrene polymer in form of an aqueous dispersion containing a coalescent, a dispersant, an antifoaming agent, a thickener, and ethylene glycol – balance up to 100.
EFFECT: disclosed additive imparts hydrophobic properties to the surface of inorganic fibre (cotton) and increases mechanical strength characteristics of the end product to 31 %.
1 cl, 7 ex
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