Patent ID: 11932709
Assignee: LG CHEM, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 7:
8. A method for preparing the diene-based rubber latex of claim 1, the method comprising:
a) polymerizing a first conjugated diene-based monomer in the presence of an emulsifier and a fat-soluble polymerization initiator to prepare a first polymerization product of a polymerization conversion ratio of 30% to 40%;
b) injecting a water-soluble polymerization initiator into the first polymerization product and elevating a temperature to prepare a second polymerization product of a polymerization conversion ratio of 60% to 70%;
c) injecting a second conjugated diene-based monomer into the second polymerization product and polymerizing to prepare a third polymerization product of a polymerization conversion ratio of 85% to 93%; and
d) injecting a polymer aggregate with an average particle diameter of 230 nm to 300 nm and a water-soluble polymerization initiator into the third polymerization product and polymerizing,
wherein the first conjugated diene-based monomer and the second conjugated diene-based monomer are used in a weight ratio of 80 to 95:5 to 20, and
the polymer aggregate is injected in 0.01 parts by weight to 1.50 parts by weight based on 100 parts by weight of a total amount of the first conjugated diene-based monomer and the second conjugated diene-based monomer.