Patent GB-1024881-A (GB)
Title: Improvements in insolubilized starch
Inventor: HART ROBERT THOMPSON
IPC: D21H19/54
Filed: 1962-09-26
Abstract: A cooked starch containing less than 0.5% carboxyl groups is insolubilized by contacting it with a zirconium salt.  The preferred salt is ammonium zirconyl carbonate.  Ammonium zirconyl carbonate may be added to a paper-coating composition containing cooked starch, or paper may be coated on or off the machine with a starch composition containing no zirconium or insufficient zirconium, and then sprayed with or passed through a bath of ammonium zirconyl carbonate. Examples are given of coating (1) a base stock of the type used for the production of high quality coated paper, and (2) a 200 lb. per ream cylinder board. A laminate may be formed from two sheets, one or both of which are so coated by passage through a laminating nip.  The coating or adhesive composition may also include a latex of a butadiene-styrene polymer, clay, calcium carbonate, titanium dioxide, blanc fixe and/or satin white.ALSO:A cooked starch containing less than 0.5% carboxyl groups is insolubilized by contacting it with a zirconium salt.  The preferred salt is ammonium zirconyl carbonate. Ammonium zirconyl carbonate may be added to a paper-coating composition containing cooked starch, or paper may be coated on or off the machine with a starch composition containing no zirconium or insufficient zirconium, and then sprayed with or passed through a bath of ammonium zirconyl carbonate.  Examples are given of coating (1) a base stock of the type used for the production of high quality coated paper, and (2) a 200 lb. per ream cylinder board.  A laminate may be formed from two sheets one or both of which are so coated by passage through a laminating nip.  The coating or adhesive composition may also include a latex of a butadiene-styrene polymer, clay, calcium carbonate, titanium dioxide, blanc fixe and/or satin white.ALSO:A cooked starch containing less than 0.5% carboxyl groups is insolubilized by contacting it with a zirconium salt.  The preferred salt is ammonium zirconyl carbonate.  Ammonium zirconyl carbonate may be added to a paper-coating composition containing cooked starch, or paper may be coated on or off the machine with a starch composition containing no zirconium or insufficient zirconium, and then sprayed with or passed through a bath of ammonium zirconyl carbonate.  Examples are given of coating (1) a base stock of the type used for the production of high quality coated paper and (2) a 200-lb. per ream cylinder board.  A laminate may be formed from two sheets one or both of which are so coated by passage through a laminating nip.  The coating or adhesive composition may also include a latex of a butadiene-styrene polymer, clay, calcium carbonate, titanium dioxide, blanc fixe and/or satin white.ALSO:A cooked starch containing less than 0.5% carboxyl groups is insolubilised by contacting it with a zirconium salt.  The preferred salt is ammonium zirconyl carbonate.  Ammonium zirconyl carbonate may be added to a paper-coating composition containing cooked starch, or paper may be coated on or off the machine with a starch composition containing no zirconium or insufficient zirconium, and then sprayed with or passed through a bath of ammonium zirconyl carbonate.  Examples are given of coating (1) a base stock of the type used for the production of high quality coated paper and (2) a 200-lb. per ream cylinder board.  The coating or adhesive composition may also include a latex of a butadiene-styrene polymer, clay, calcium carbonate, titanium dioxide, blanc fixe and/or satin white.