Legkih B.M., Fedorchenko V.I.
SOME BEHAVIOUR FEATURES OF UREAFORMALDEHYDE PITCHES USED IN MANUFACTURING OF BUILDING MATERIALS ^{[№ 9 ' 2004]}
The results are given of experimental researches on definition of the starting time of polymerization of carbamide - formaldehyde pitches solutions depending on various factors. It is shown, that the determining factor is the size of a hydrogen parameter рН of a pitch solution. It is shown, that at equal values of рН size, time from the beginning of a preparation of pitches solutions to the beginning of their polymerization does not depend on mark of pitches, on time of their storage, and also on a parity of a solution components at which this size is achieved.