Reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[C:9]([OH:14])(=[O:13])[C:10]([CH3:12])=[CH2:11].C(C1C=CC=CC=1)C.C(S)CCCCCCCCCCC.C(OOC1(OOC(C)(C)C)CC(C)CC(C)(C)C1)(C)(C)C>>[CH:1]([CH2:12][C:10](=[CH2:11])[C:9]([OH:14])=[O:13])=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1Participants
Procedure
A mixture of 78.0 parts by weight of styrene, 2.0 parts by weight of methacrylic acid, 20 parts by weight of ethylbenzene, 0.02 parts by weight of n-dodecyl mercaptan, and 0.03 parts by weight of 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane as an initiator was continuously supplied into a coil type complete mixing reactor at a rate of 2.5 l/hr. so that the reaction mixture was allowed to undergo polymerization at a temperature of 150° C. for an average retention time of 2 hours with a polymer solid concentration of 47%. Subsequently, the polymerization solution was introduced into a 230° C. devolatizing apparatus where the unreacted monomers and the solvent were removed to obtain a styrene-methacrylic acid copolymer. The copolymer thus obtained exhibited a styrene/methacrylic acid weight ratio of 96/4, a weight-average molecular weight of 120,000 and a number-average molecular weight of 63,000 (hereinafter referred to as "SMAA-3").
Workup
- customwas continuously supplied into a coil type complete mixing reactor at a rate of 2.5 l/hr
- custompolymerization at a temperature of 150° C. for an average retention time of 2 hours with a polymer solid concentration of 47%
- additionSubsequently, the polymerization solution was introduced into a 230° C.
- customthe solvent were removed
Sources & evidence
- ORD record
- ord-01b07a9746714e8d990eda23138df97b
- Source dataset
- uspto-grants-2000_07
- Patent number
- US06093760
Linked notes
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