公开(公告)号：US3563945A

公开(公告)日：1971-02-16

申请号：US3563945D

申请日：1968-04-10

Applicant: STALEY MFG CO A E

Inventor： JOHNSON DONALD L ,  PROTZMAN THOMAS F ,  ZIMMERMAN JERREL L

IPC: C08L27/08 ,  C08F45/24 ,  C09D5/02

CPC classification number: C08L27/08 ,  C08L2666/26

Abstract: A NON-CORROSIVE, STABLE POLYVINYLIDENE CHLORIDE LATEX IS PRODUCED BY ADDING CORROSION INHIBITING AMOUNTS OF A PEROXIDE DESTROYING ENZYME SUCH AS A PEROXIDASE OR CATALASE TO A POLYVINYLIDENE CHLORIDE LATEX CONTAINING RESIDUAL PEROXIDES. THE STABILIZED COMPOSITION HAS PARTICULAR UTILITY AS A COATING FOR CELLULOSIC SUBSTRATES.

公开(公告)号：US3884853A

公开(公告)日：1975-05-20

申请号：US41591373

申请日：1973-11-14

Applicant: STALEY MFG CO A E

Inventor： ZIMMERMAN JERREL L

IPC: C09D103/00 ,  C08B31/16 ,  D21H19/54 ,  C08B25/02

CPC classification number: C08B31/16 ,  D21H19/54

Abstract: An alkali-stable, modified starch for use in paper coating binders as a replacement for protein (casein and delta protein) over a broad pH ranging from 6 to about 9.5, when ammonia is used to adjust pH. A cationic starch derivative having quaternary ammonium groups is reacted with maleic anhydride to yield an amphoteric starch having a net anionic charge. This product insolubilizes with conventional starch insolubilizers, such as melamine formaldehyde resin, at pH of 6 and higher to produce wet-rub resistant coatings when formulated with clay and coated on paper and paperboard substrates. Crosslinking is effected rapidly to produce complete insolubilization, especially when used with a minimum of 50% latex as a binder. Maleic anhydride provides anionic properties to the cationic starch molecule to yield an amphoteric starch with a net anionic charge. Maleic anhydride is used because the starch so produced is capable of self-crosslinking at high pHs to produce insolubilized coatings resistant to water. Crosslinking is effected by drying the paste films without the use of a catalyst. When alkaline conditions are required such as when using alkaliswellable latex, pH adjustments are made with ammonia, which flashes off during insolubilization. The maleated starches selfcrosslink and insolubilize at high pH levels, and become immobile before water is completely removed. The rapid insolubilization minimizes binder migration.