Patents by Inventor Otto Loeffler

Otto Loeffler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for making overbased PVC stablizer
    Patent number: 5888427
    Abstract: An overbased mixture of aliphatic and aromatic carboxylates salts useful in making low-fogging thermal stabilizers for PVC is made by reacting zinc oxide with fatty acid and such as stearic acid, then adding aromatic acids, and then adding and reacting one or both of magnesium oxide and calcium oxide, under controlled heating conditions to maintain fluidity while minimizing side reactions, and then conditioning the reaction product to remove volatiles.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: March 30, 1999
    Assignee: Witco Corporation
    Inventors: Lawrence R. Brecker, Radu Bacaloglu, Michael Fisch, Mukund Shah, Otto Loeffler
  • Liquid PVC stabilizers and lubricants
    Patent number: 5880189
    Abstract: Disclosed is a stabilizer composition effective to protect PVC resin against heat-mediated deterioration, comprising a mixture of barium and zinc salts of aliphatic C.sub.6 -C.sub.20 carboxylates and aromatic C.sub.7 -C.sub.12 carboxylates, organic triphosphites of the formula R.sub.1 OP(OR.sub.3)OR.sub.2 wherein each of R.sub.1, R.sub.2 and R.sub.3 is C.sub.6 -C.sub.12 alkyl or phenyl, and organic acid phosphites of the formula R.sub.4 OP(OH)OR.sub.5 wherein each of R.sub.4 and R.sub.5 is C.sub.6 -C.sub.12 alkyl or phenyl, or R.sub.4 can be hydrogen. PVC film compounded with this stabilizer composition also exhibits improved wettability and adherence to water-based inks applied to such films.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: March 9, 1999
    Assignee: Witco Corporation
    Inventors: Michael A. Croce, Kook Jin Bae, Otto Loeffler
  • Method for making overbased PVC stabilizer
    Patent number: 5656202
    Abstract: An overbased mixture of aliphatic and aromatic carboxylates salts useful in making low-fogging thermal stabilizers for PVC is made by reacting zinc oxide with fatty acid and such as stearic acid, then adding aromatic acids, and then adding and reacting one or both of magnesium oxide and calcium oxide, under controlled heating conditions to maintain fluidity while minimizing side reactions, and then conditioning the reaction product to remove volatiles.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: August 12, 1997
    Assignee: Witco Corporation
    Inventors: Lawrence R. Brecker, Radu Bacaloglu, Michael Fisch, Mukund Shah, Otto Loeffler
  • Liquid polyvinyl chloride resin stabilizer systems based on complexes of organic triphosphites with zinc chloride
    Patent number: 4782170
    Abstract: Liquid polyvinyl chloride resin stabilizer systems are provided, based on complexes of organic triphosphites with zinc chloride, and, in addition, other compatible polyvinyl chloride resin stabilizers, including particularly, thiophosphites of mercaptocarboxylic acid esters, as well as barium-cadmium and barium-zinc carboxylic acid salt combinations, and liquid barium carbonate-alkyl phenate complexes.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: November 1, 1988
    Assignee: Argus Chemical Corporation
    Inventors: Kook J. Bae, Michael Fisch, Otto Loeffler