Patent ID: 6136973
Filing Date: 2000-10-24
Classification: C08K,C09K

Abstract:
A melamine melam melem salt of a polyphosphoric acid of the formula (1):.alpha.(MmH).sub.2 O.multidot..beta.(MdH).sub.2 O.multidot..gamma.(MpH).sub.2 O.multidot..delta.P.sub.2 O.sub.5( 1)wherein Mm represents melamine, Md represents melam, Mp represents melem, H represents a hydrogen atom, P represents a phosphorus atom, O represents an oxygen atom, and .alpha., .beta., .gamma. and .delta. represent positive numbers, having an interrelation of 1.ltoreq.(.alpha.+.beta.+.gamma.)/.delta.<2,which has a solubility of from 0.01 to 0.10 g/100 ml in water (25.degree. C.), a pH of from 4.0 co 7.0 as a 10 wt % aqueous slurry (25.degree. C.), and a melamine content of from 0.05 to 1.00 mol, a melam content of from 0.30 to 0.60 mol and a melem content of from 0.05 to 0.80 mol, per mol of the phosphorous atom.