Back to results
US 11,192,983 B2Granted
Production method for polymer latex
AssigneeZeon Corporation
InventorsJunji Kodemura, Yoshitaka Satoh
Life of this patent
Estimating the term…
Abstract
A method for producing a polymer latex includes: a preparation step of reducing the weight average molecular weight of a conjugated diene polymer (A) by 20 to 70 mass %, thereby obtaining an organic solvent solution containing a conjugated diene polymer (B) having a weight average molecular weight lower than that of the conjugated diene polymer (A); and an emulsification step of emulsifying the organic solvent solution in water in the presence of a surfactant, thereby obtaining a polymer latex.
Claims9
A method for producing a polymer latex comprising:
- a preparation step of reducing the weight average molecular weight of a conjugated diene polymer (A) by 20 to 70 mass % to obtain a conjugated diene polymer (B) in an organic solvent, the preparation step comprising either one of the following two methods:
- obtaining the conjugated diene polymer (B) and then dissolving the conjugated diene polymer (B) in an organic solvent, or
- dissolving the conjugated diene polymer (A) in the organic solvent and then obtaining the conjugated diene polymer (B),
- thereby obtaining an organic solvent solution containing the conjugated diene polymer (B) having a weight average molecular weight lower than that of the conjugated diene polymer (A), and
- an emulsification step of emulsifying the organic solvent solution in water in the presence of a surfactant, thereby obtaining a polymer latex, wherein
- the molecular weight distribution of the conjugated diene polymer (B) is in the range from 2.7 to 3.3.
3 more elements
Dependencies are inferred from the claim text.