| 摘要 |
FIELD: rubber and tire industry. SUBSTANCE: rubber modifying agent has, wt.-%: resorcinol 20-40; hexamethylenetetramine 4-30; boric acid 2-5; silicate filler 20-30; mineral oil 3-8, and novolacs phenolformaldehyde resin modified with ε-caprolactam and/or oligomer-lactam concentrate 5-20. Resin properties: density is 1.1-1.3 g/cm; melting point is 90-120; nitrogen content is 5-6 wt. -%, and mass part of insoluble impurities is 0.2%, not above. EFFECT: enhanced quality of modifying agent. |
