| 摘要 |
PCT No. PCT/GB84/00281 Sec. 371 Date Apr. 11, 1985 Sec. 102(e) Date Apr. 11, 1985 PCT Filed Aug. 13, 1984 PCT Pub. No. WO85/00822 PCT Pub. Date Feb. 28, 1985.A series of melamine-phenol-formaldehyde resoles for pressure-free to low pressure, low/medium temperture conversion into moulded product. The molar ratio of melamine:phenol is the range 1:4.7 to 1:0.29; for each mole of melamine there are 1.5 to 3 moles of formaldehyde; and for each mole of phenol there are 1.2 to 2 moles of formaldehyde. The resin compositions may contain fillers/reinforcing fibers, glycols and water curing is at or near neutal pH and may be accelerated by the use of boric oxide or acid and also by microwave heating. Moulded products have good heat-and fire-resistance, and good smoke emission properties, and are non-toxic. |
