Hydroxycarboxylic acid polymers from polyacroleins

Abstract

Abstract SOLID LINEAR OR CROSS-LINKED HYDROXYCARBOXYLIC ACID POLYMERS WHICH IN THE MAIN CHAIN HAVE PREDOMINANTLY CARBON-TO-CARBON BONDS, ALL, OR THE MAJOR PART OF THE UNITS IN THE MAIN CHAIN, HAVING THE FORMULA -CH2-C(-R1)(-COO-A)-, AND -CH2-C(-R)(-CH2-OH)-, OR -CH2-CH-OH WHEREIN R AND R'' ARE THE SAME OR DIFFERENT AND ARE ALKYL HAVING 1 TO 6 CARBON ATOMS OR HYDROGEN AND WHEREIN R1 MAY ALSO BE HALOGEN. IN ADDITION, THERE MAY BE A MINOR AMOUNT, RELATIVE TO THE NUMBER OF THE UNITS (I), (II) AND (III), OF UNITS OF THE FORMULA -C(-R)(-COO-A)-C(-R)(-COO-A)- WHEREIN A IS HYDROGEN, ONE VALENCE OF A MONOVALENT OR A POLYVALENT METAL OF AMMONIUM. ALL OF THESE UNITS ARE ARRANGED IN RANDOM SEQUENCE AND THEIR NUMBE IS SUCH THAT THE RATIO OF CARBOXYL OR CARBOXYLATE OT HYDROXYL GROUPS IS BETWEEN 1.1 AND 16. THE MINIMUM DEGREE OF POLYMERIZATION IS 3; PREFERABLY, IT IS NOT ABOVE 5000, AND PARTICULARLY BETWEEN 3 AND 600. THE POLYMERS ARE VALUABLE AS COMPLEXING AGENTS.

Inventors

• 👤 Heinz Haschke
• 👤 Erich Bader

Bibliographic Details