Methacrylic Acid → Acrylic Acid

Participants

Reaction Steps

A blend of 25 mole % acrylic acid and 75 mole % ammonium acrylate was polymerised by the same general technique as in Example 1 except that the dispersion stabiliser mixture was formed of 75% by weight of a 2:1 molar copolymer of ceto stearyl methacrylate to methacrylic acid and 25% by weight sorbitan monooleate and the aqueous phase contained 0.4722 mole % of monomers based on weight of aqueous phase, 0.795×10-4 mole % of penta sodium diethylenetriamine pentaacetate based on weight of aqueous phase, 5.13×10-2 mole % of mono-sodium phosphate dihydrate based on weight of aqueous phase, 21.76×10-3 mole % of cross-linking agent (methylene-bisacrylamide) based on moles of monomers and 9.2×10-3 mole % of azobisamidinopropane hydrochloride based on moles of monomers. The dispersion obtained upon polymerisation and distillation was rendered water dispersible by adding 7.3% by weight on weight of final oil phase a phosphoric acid ester of a 5 mole ethoxylate of tridecanol and 7.3% by weight on weight of final oil phase of a 7 mole ethoxylate of nonyl phenol.

Provenance & Evidence