反应详情

The mixture of polysiliconformic acid, orthosilicoformic acid, silicoformic acid and metasilicic acid as produced in Example XIV are mixed with 30 parts by weight of melamine and added to 100 parts by weight of an aqueous solution containing about 37% formaldehyde, then dilute sulfuric acid is added until the pH is 4 to 6. The mixture is heated to 70° to 100° C., while agitating; the silicic acid and melamine go into solution, and, in 20 to 60 minutes or until the desired viscosity is obtained, produces a white poly (formaldehyde melamine silicate melamine silicoformate) resin. The said resin softens with heat and may be molded into useful objects. The said resin is soluble in acetic acid and, when applied to wood and dried, it produces a tough clear protective coating.

1. customas produced in Example XIV
2. additionadded to 100 parts by weight of an aqueous solution
3. temperatureThe mixture is heated to 70° to 100° C.
4. customuntil the desired viscosity is obtained