Abstract 1. PROCESS FOR THE PREPARATION OF A WHITE, BRIGHT AND OPAQUE PRECIPITATED UREA FORMALDEHYDE PIGMENT IN SLURRY FORM FOR USE IN A PAPERMAKING OPERATION WHICH COMPRISES THE STEPS OF: (A) SELECTING UREA FORMALDEHYDE RESIN THAT HAS BEEN REACTED AT LEAST TO ITS WATER INSOLUBLE ATAGE, SAID RESIN HAVING A WATER TOLERANCE OF FROM ABOUT 1.5 TO 5.0 AND A VISCOSITY OF AT LEAST ABOUT 450 CPS. AT 50% SOLIDS; (B) PRECIPITATING SAID RESIN IN AN AQUEOUS PRECIPITATING BATH CONTAINING FROM ABOUT 0.125 TO 1.5% BY VOLUME OF A STRONG MINERAL ACID CATALYST AT A TEMPERATURE OF FROM ABOUT 20-95 DEGREES C., UNDER AGITATION, AT A RESIN TO WATER RATIO OF FROM 1/16 TO 3/8, BY ADDING SAID RESIN TO THE PRECIPITATING BATH OVER A PERIOD OF TIME RANGING FROM ABOUT 15 MINUTES TO ONE HOUR TO FORM THE PRECIPITATED UREA FORMALDEHYDE PIGMENT; AND, (C) REACTING THE MIXTURE OF RESIN AND PRECIPITATING BATH FOR AN ADDITIONAL PERIOD OF TIME TO INSURE A TOTAL REACTION TIME OF FROM ABOUT 1/2 TO 5 HOURS BEFORE COLLECTING THE PRECIPITATED PIGMENT PRODUCT AND HOMOGENIZING THE PRODUCT TO A PARTICLE SIZE OF FROM ABOUT 0.1 TO 0.5 MICRON IN AN AGGLOMERATED STRUCTURE OF FROM ABOUT 3 TO 6 MICRONS.
PROCESS FOR THE PREPARATION OF A WHITE, BRIGHT AND OPAQUE PRECIPITATED UREA FORMALDEHYDE PIGMENT IN SLURRY FORM FOR USE IN A PAPERMAKING OPERATION WHICH COMPRISES THE STEPS OF: (A) SELECTING UREA FORMALDEHYDE RESIN THAT HAS BEEN REACTED AT LEAST TO ITS WATER INSOLUBLE ATAGE, SAID RESIN HAVING A WATER TOLERANCE OF FROM ABOUT 1.5 TO 5.0 AND A VISCOSITY OF AT LEAST ABOUT 450 CPS. AT 50% SOLIDS; (B) PRECIPITATING SAID RESIN IN AN AQUEOUS PRECIPITATING BATH CONTAINING FROM ABOUT 0.125 TO 1.5% BY VOLUME OF A STRONG MINERAL ACID CATALYST AT A TEMPERATURE OF FROM ABOUT 20-95 DEGREES C., UNDER AGITATION, AT A RESIN TO WATER RATIO OF FROM 1/16 TO 3/8, BY ADDING SAID RESIN TO THE PRECIPITATING BATH OVER A PERIOD OF TIME RANGING FROM ABOUT 15 MINUTES TO ONE HOUR TO FORM THE PRECIPITATED UREA FORMALDEHYDE PIGMENT; AND, (C) REACTING THE MIXTURE OF RESIN AND PRECIPITATING BATH FOR AN ADDITIONAL PERIOD OF TIME TO INSURE A TOTAL REACTION TIME OF FROM ABOUT 1/2 TO 5 HOURS BEFORE COLLECTING THE PRECIPITATED PIGMENT PRODUCT AND HOMOGENIZING THE PRODUCT TO A PARTICLE SIZE OF FROM ABOUT 0.1 TO 0.5 MICRON IN AN AGGLOMERATED STRUCTURE OF FROM ABOUT 3 TO 6 MICRONS.
Claim 2
Dependent Claim
202 words
PROCESS FOR THE PREPARATION OF A WHITE, BRIGHT AND OPAQUE PRECIPITATED UREA FORMALDEHYDE PIGMENT IN SLURRY FORM FOR USE IN A PAPERMAKING OPERATION WHICH COMPRISES THE STEPS OF: (A) SELECTING UREA FORMALDEHYDE RESIN THAT HAS BEEN REACTED AT LEAST TO ITS WATER INSOLUBLE ATAGE, SAID RESIN HAVING A WATER TOLERANCE OF FROM ABOUT 1.5 TO 5.0 AND A VISCOSITY OF AT LEAST ABOUT 450 CPS. AT 50% SOLIDS; (B) PRECIPITATING SAID RESIN IN AN AQUEOUS PRECIPITATING BATH CONTAINING FROM ABOUT 0.125 TO 1.5% BY VOLUME OF A STRONG MINERAL ACID CATALYST AT A TEMPERATURE OF FROM ABOUT 20-95 DEGREES C., UNDER AGITATION, AT A RESIN TO WATER RATIO OF FROM 1/16 TO 3/8, BY ADDING SAID RESIN TO THE PRECIPITATING BATH OVER A PERIOD OF TIME RANGING FROM ABOUT 15 MINUTES TO ONE HOUR TO FORM THE PRECIPITATED UREA FORMALDEHYDE PIGMENT; AND, (C) REACTING THE MIXTURE OF RESIN AND PRECIPITATING BATH FOR AN ADDITIONAL PERIOD OF TIME TO INSURE A TOTAL REACTION TIME OF FROM ABOUT 1/2 TO 5 HOURS BEFORE COLLECTING THE PRECIPITATED PIGMENT PRODUCT AND HOMOGENIZING THE PRODUCT TO A PARTICLE SIZE OF FROM ABOUT 0.1 TO 0.5 MICRON IN AN AGGLOMERATED STRUCTURE OF FROM ABOUT 3 TO 6 MICRONS.