Acrylic Acid → HCID 131724291, compound

Participants

Reaction Conditions

Reaction Steps

Charge 1 was added to a 4-liter stirred stainless steel pressure reactor. The reactor was then pressurized with nitrogen providing a 5 psig pad on the reactor. The agitation on the reactor was set and the reactor temperature was adjusted to 150° C. Charge 2 was added to the reactor at addition rate of 52 grams/hour over 2.5 hours. After 15 minutes Charge 3 was added to reactor at the addition rate 500 grams/hour over 2 hours. During the monomer addition the temperature was maintained at 150° C. at 100 PSI. After charge 2 and charge 3 were in the reactor, the reaction mixture was held for 2 hours. The reactor was then cooled to 25° C., and vented. GC analysis of the reaction mixture showed that all acrylates, methacrylates and styrene were reacted. The reaction mixture was transferred to a 3 L flask, and was vacuum-stripped at 130° C. The final solids of the resulting polymer was determined by adding 200 grams of butyl acetate to the polymer mixture. The solids were measured at 82.2% at 110° C. for one hour. The copolymer had Mn=1560 and Mw/Mn=2.2. The 13C NMR spectrum is consistent with a molar copolymer composition of 20.4% Diisobutylene, 36.3% Hydroxypropyl acrylate, 16.1% Butyl methacrylate, 8.1% Styrene, 2.4% Acrylic acid, and 17.6% Butyl acrylate.

Provenance & Evidence