COMPOSITION FOR ACOUSTIC DEVICE DIAPHRAGM MAKING

摘要

FIELD: special compositions. SUBSTANCE: proposed composition has additionally oxides and involves the following components, weight p. p.: phenolformaldehyde resin 80-120; urotropin 8-12; synthetic rubber 15-25; sulfur 0.4-0.8; gas-forming agent 1-6; silicon oxide 3-8; aluminium oxide 1-2; calcium oxide 1.4-2.1; magnesium oxide 0.2-0.6; sodium oxide 0.04-0.08, and boron 0.06-0.10. Composition is applied on reinforcing filling agent at amount 45-80 weight parts. EFFECT: enhanced strength of articles.