Propylene Glycol → HCID 12142619, compound

Participants

Reaction Conditions

Reaction Steps

999.28 Parts propylene glycol and 434.85 parts 2-pentanone were added to a mixing vessel equipped with a condenser, nitrogen blanket, agitator, and addition funnel. The contents were heated to about 52° C., followed by addition of 1450.97 parts MONDUR MR polymeric isocyanate while keeping the exotherm below 75° C. The addition funnel was next rinsed with 154.87 parts 2-pentanone. The reaction mixture was held at 75° C. for one to two hours until the isocyanate was consumed (thereby forming a beta-hydroxypropyl urethane polymer), then cooled to 60° C. while adding 759.92 parts propylene glycol monomethyl ether (thereby forming a beta-hydroxypropyl urethane solution). The resulting blocked polymeric isocyanate solution was mixed for 30 minutes and stored in a plastic storage vessel.

Provenance & Evidence