公开(公告)号：US3785921A

公开(公告)日：1974-01-15

申请号：US3785921D

申请日：1971-12-21

申请人： MITSUBISHI RAYON CO ,  NITTO KAGYO CO LTD

发明人： IDE F ,  KODAMA T ,  KOTAKE Y

IPC分类号： D21H17/24 ,  C08L51/02 ,  D21H17/28 ,  C08D9/06 ,  D21H3/08 ,  D21H3/28

CPC分类号： D21H17/28 ,  C08L51/02 ,  C08L2666/02

摘要： PAPER REINFORCING AGENT COMPOSED MAINLY OF A POLYMER COMPOSITION WHICH INCLUDES A GRAFT POLYMER, A WATERSOLUBLE POLYSACCHARIDE, AND, IF NECESSARY, AN ACRYLAMIDE TYPE RANDOM COPOLYMER. THE GRAFT POLYMER IS THAT HAVING THE WATER-SOLUBLE POLYSACCHARIDE AS ITS BACKBONE POLYMER AND A COPOLYMER DERIVED FROM A MONOMER MIXTURE OF ACRYLAMIDE AND AN UNSATURATED CARBOXYKIC ACID, AS ITS BRANCH POLYMER; SAID RANDOM COPLYMER IS THAT WHICH IS DERIVED FROM THE AFORESAID MONOMER MIXTURE. THE WATER-SOLUBLE POLYSACCHARIDE CONTENT IS 5-22% BY WEIGHT BASED ON THE COMPOSITION. THE PAPER REINFORCING AGENT IS OBTAINED BY POLYMERIZING THE AFORESAID MONOMER MIXTURE IN THE PRESENCE OF THE WATER-SOLUBLE POLYSACCHRIDE, OR BY FURTHER ADDING THERETO A SUITABLE AMOUNT OF THE WATER-SOLUBLE POLYSACCHARIDE AMD/OR THE ACRYLAMIDE TYPE RANDOM COPOLYMER. THE REINFORCING AGENT EXHIBITS HIGH PAPER-REINFORCING PROPERTY EVEN IN A SMALL QUANTITY AND IS MARKEDLY CHEAPER THAN ANY OF THE KNOW ACRYLAMIDE TYPE PAPER REINFORCING AGENTS.

公开(公告)号：US3850898A

公开(公告)日：1974-11-26

申请号：US34183273

申请日：1973-03-16

申请人： MITSUBISHI RAYON CO

发明人： KORENAGA S ,  IDE F ,  KOTAKE Y

IPC分类号： C02F1/54 ,  C08F8/44 ,  C08F220/06 ,  C08F15/02

CPC分类号： C08F220/06 ,  C02F1/54 ,  C08F8/44

摘要： 1. A PROCESS FOR THE PREPARATION OF A HIGH MOLECULAR FLUOCCULANT WITH A MOLECULAR WEIGHT GREATER THAN 1,000,000 DETERMINED BY MEASUREMENT OF VISCOSITY OF AN AQUEOUS SOLUTION CONTAINING AN EXCESS OF NEUTRAL SLATS WHICH COMPRISES POLYMERIZING 55 TO 95 WEIGHT PERCENT OF AT LEAST ONE (I) OF ACRYLIC OR METHACRYLIC ACIDS AND 45 TO 5 WEIGHT PERCENT OF AT LEAST ONE (II) OF MONOMERS REPRESENTED BY THE FORMULA

H2C=C(-R1)-R2

WHEREIN R1 IS A HYDROGEN OR METHYL AND R2 IS -COOR3 RADICAL WHEREIN R3 IS ALKYL, ARYL OR ALKYLARYL GROUPS OR -CN RADICAL IN WATER MEDIUM WITH STIRRING TO PRODUCE A SUSPENSION OF A COPOLYMER WHICH IS INSOLUBLE UNDER THE POLYMERIZATION CONDITIONS BUT SOLUBLE IN NEUTRAL OR ALKALINE WATER, ADDING SAID SUSPENSION INTO AT LEAST ONE OF HYDROXIDES OF AN ALKALI METAL OR AMMONIA DISSOLVED IN AT LEAST ONE OF ALCOHOLS OF C1 TO C6 OR A WATER-CONTAINING ALCOLHOL WITH STIRRING THEREBY OBTAINING AN ALCOHOL SUSPENSION OF A WATER-SOLUBLE COPOLYMER WITH ITS CARBOXYL GROUP BEING COMPLETELY OR PARTIALLY NEUTRALIZED, AND THEN REMOVING THE COPOLYMER IN FORM OF PARTICLES FOLLOWED BY DRYING.