sodium;prop-2-ene-1-sulfonate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 2,000 ml. glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 430 parts of vinyl acetate, 215 parts of methanol, 30 parts of sodium allylsulfonate and 0.20% by mole of azobisisobutylonitrile per the vinyl acetate. After carrying out the polymerization at a temperature of 60° to 65°C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl actate-sodium allylsulfonate copolymer containing 2.5% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 90% by mole. glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65°C. for 8 hours the residual vinyl acetate was removed by a conventional method

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 1,000 ml. glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 395 parts of vinyl acetate, 186 parts of methanol, 27 parts of sodium allylsulfonate and 0.23% by mole per the vinyl acetate of azobisisobutylonitrile. After carrying out the polymerization at a temperature of 60° to 65°C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl acetate-sodium allylsulfonate copolymer containing 3.0% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 99% by mole. glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65°C. for 8 hours the residual vinyl acetate was removed by a conventional method

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 1,000 ml. glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 395 parts of vinyl acetate, 186 parts of methanol, 27 parts of sodium allylsulfonate and 0.23% by mole per the vinyl acetate of azobisisobutylonitrile. After carrying out the polymerization at a temperature of 60° to 65°C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl acetate-sodium allylsulfonate copolymer containing 3.0% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 99% by mole. glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65°C. for 8 hours the residual vinyl acetate was removed by a conventional method

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 430 parts of vinyl acetate, 215 parts of methanol, 30 parts of sodium allylsulfonate and 0.20% by mole of azobisisobutylonitrile per mole of the vinyl acetate. After carrying out the polymerization at a temperature of 60° to 65° C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl acetate-sodium allylsulfonate copolymer containing 2.5% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 98.5% by mole. A glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65° C. for 8 hours the residual vinyl acetate was removed by a conventional method

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 2,000 ml. glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 430 parts of vinyl acetate, 215 parts of methanol, 30 parts of sodium allylsulfonate and 0.20% by mole of azobisisobutylonitrile per the vinyl acetate. After carrying out the polymerization at a temperature of 60° to 65°C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl actate-sodium allylsulfonate copolymer containing 2.5% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 90% by mole. glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65°C. for 8 hours the residual vinyl acetate was removed by a conventional method

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 1,000 ml. glass polymerization vessel equipped with a reflux condenser, a dropping funnel, a thermometer and a stirrer was charged with 395 parts of vinyl acetate, 186 parts of methanol, 27 parts of sodium allylsulfonate and 0.23% by mole per the vinyl acetate of azobisisobutylonitrile. After carrying out the polymerization at a temperature of 60° to 65°C. for 8 hours, the residual vinyl acetate was removed by a conventional method to give vinyl acetate-sodium allylsulfonate copolymer containing 3.0% by mole of sodium allylsulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis in vinyl acetate unit was 99% by mole. glass polymerization vessel equipped with a reflux condenser, a dropping funnel the polymerization at a temperature of 60° to 65°C. for 8 hours the residual vinyl acetate was removed by a conventional method