Polychloroprene for non-phasing solvent cements
Abstract
Abstract CHLOROPRENE POLYMERS, USEFUL IN NON-PHASING SOLVENT CEMENTS HAVING GOOD TACK, ARE PRODUCED BY POLYMERIZING CHLOROPRENE, OPTIONALLY WITH ANOTHER COPOLYMERIZABLE MONOMER, IN AN AQUEOUS ALKALINE EMULSION IN THE PRESENCE OF WATEER-SOLUBLE SALTS OF: (A) ABOUT 0.5 TO 1.5 PERCENT OF A ROSIN ACID (B) ABOUT 1 TO 2 PERCENT OF A C12 TO C20 UNSATURATED FATTY ACID AND (C) ABOUT 0.5 TO 1.5 PERCENT OF A CONDENSATION PRODUCT OF FORMALDEHYDE WITH A NAPHTHALENE SULFONIC ACID, ALL PERCENTAGES BEING BY WEIGHT BASED ON THE WEIGHT OF CHLOROPRENE AND ANY OTHER COPOLYMERIZABLE MONOMER PRESENT, THE PERCENTAGE OF (A) AND (B) BEING BASED ON THE FREE ACID AND OF (C) BEING BASED ON THE SALT; THE TOTAL PERCENTAGE OF (A) AND (B) BEING AT LEAST 2, AND THE CONVERSION OF MONOMER TO POLYMER BEING AT LEAST ABOUT 85 PERCENT; AND OPTIONALLY HAVING PRESENT DURING POLYMERIZATION FROM 1 TO 4 PERCENT BY WEIGHT OF A METHYL ESTER OF A NATURALLY OCCURING ROSIN ACID BASED ON THE WEIGHT OF CHLOROPRENE.
Inventors
- 👤 R Tabibian
Bibliographic Details
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