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US 11,692,054 B2Granted
Composition for seeded polymerization, a conjugated diene copolymer, an molded body, and a method for preparing the same
AssigneeKorea Kumho Petrochemical Co., Ltd.
InventorsDu Seong Ahn, Gwanghoon Kwag, Jae Kon Suh
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Abstract
A composition for seeded polymerization includes: a seed copolymer which has a compound having dithioate, a mercaptan compound, a first aromatic vinyl monomer, and a first conjugated diene monomer, and has an average particle diameter of 10-30 nm; a second aromatic vinyl monomer; and a second conjugated diene monomer.
Claims18
A composition for seeded polymerization, comprising:
- a seed copolymer which comprises a compound comprising dithioate, a mercaptan compound, a first aromatic vinyl monomer, and a first conjugated diene monomer, and has an average particle diameter of 15-25 nm;
- a second aromatic vinyl monomer;
- and
- a second conjugated diene monomer,
- wherein:
- the weight average molecular weight of the seed copolymer is 20,000-250,000 g/mol, and the seed copolymer has a polydispersity index of particle diameter of 0.250 or less and a toluene-insoluble gel content of 10% or less.
3 more elements
A method for preparing a conjugated diene copolymer, comprising:
- (a) preparing a seed copolymer having an average particle diameter of 15-25 by reacting a compound comprising dithioate, a mercaptan compound, a first aromatic vinyl monomer and a first conjugated diene monomer;
- and
- (b) preparing a conjugated diene copolymer by reacting the seed copolymer, a mercaptan compound, a second aromatic vinyl monomer and a second conjugated diene monomer,
- wherein:
- the weight average molecular weight of the seed copolymer is 20,000-250,000 g/mol, and the seed copolymer has a polydispersity index of particle diameter of 0.250 or less and a toluene-insoluble gel content of 10% or less.
2 more elements
Dependencies are inferred from the claim text.