Process of preparation of polycaprolactone polyesters and polyurethane elastomers therefrom

Abstract

Abstract THERE IS DISCLOSED A PROCESS FOR THE POLYMERIZATION OF LINEAR, PREDOMINANTLY HYDROXYL-TERMINATED MONOMERIC COMPONENTS OR LOW MOLECULAR WEIGHT POLYMERS COMPRISING THE REACTION PRODUCTS OF (A) LOW-BOILING ALKYLENE GLYCOLS WITH 6-HYDROXY-CAPROIC ACIDS OR ALKYL ESTER FERIVATIVES THEREOF, OR OPTIONALLY (B) LOW-BOILING ALKYLENE GLYCOLS WITH E-CAPROLACTONES TO HIGHER MOLECULAR WEIGHT POLYESTERS COMPRISING SUBJECTING SAID REACTION PRODUCTS TO TEMPERATURES OF FROM ABOUT 150*C. TO ABOUT 300*C. IN THE PRESENCE OF AN ESTER INTERCHANGE CATALYST WHILE CONTINUOUSLY REMOVING THE LOW-BOILING ALKYLENE GLYCOLS FROM THE REACTING MIXTURE. THERE IS FURTHER DISCLOSED A PROCESS FOR THE DEPOLYMERIZATION OF PREDOMINANTLY HYDROXY-TERMINATED POLYESTERS COMPRISING POLYMERIC REACTION PRODUCTS OF (A) GLYCOLS, AMINO ALCOHOLS OR POLYAMINES WITH 6-HYDROXYCAPROIC ACIDS, OR ALKYL ESTER FERIVATIVES THEREOF, OR OPTIONALLY COMPRISING (B) POLYMERIC REACTION PRODUCTS OF GLYCOLS, AMINO ALCOHOLS OR POLYAMINES WITH E-CAPROLACTONES, TO LOWER MOLECULAR WEIGHT HYDROXY-TERMINATED POLYESTERS, COMPRISING SUBJECTING SAID POLYMERIC REACTION PRODUCTS TO REACTION WITH GLYCOLS AT A TEMPERATURE OF FROM 150 TO 300* C. IN THE PRESENCE OF AN ESTER INTERCHANGE CATALYST. THE RESULTING POLYESTERS ARE SUITABLE FOR THE PRODUCTION OF POLYURETHANE ELASTOMERS.

Inventors

• 👤 Fritz Hostettler
• 👤 Frank G Lombardi

Bibliographic Details