Process For Producing Isobutylene Block Copolymer
a technology of isobutylene block and copolymer, which is applied in the direction of electric propulsion mounting, gearing, transportation and packaging, etc., can solve the problems of difficult removal of catalyst residues and observed coloration of obtained resins, and achieve low catalyst residue content and high transparency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Image
Examples
production example 1
[0040] A 2 L reaction vessel equipped with a stirrer was charged with 510 mL of 1-chlorobutane (dried on molecular sieves), 57 mL of hexane (dried on molecular sieves), 0.35 g of p-dicumyl chloride and 0.24 g of dimethylacetamide. The reaction vessel was cooled to −70° C., and then 165 mL of isobutylene was added. Further, 2.2 mL of titanium tetrachloride was added to start polymerization and the reaction was continued for 1.5 hours while stirring the solution at −70° C. Thereafter, 55 mL of styrene was added into the reaction solution and the reaction was further continued for one hour to obtain a polymer solution.
[0041] It was found that the weight of the polymer in the polymer solution was 141 g.
example 1
[0042] A 3 L reaction vessel equipped with a stirrer was charged with 500 g of pure water and 0.15 g of Newcol-561H (from Nippon Nyukazai Co., Ltd.; HLB=3.3). The polymer solution obtained in Production Example 1 was charged into the reaction vessel, heated to 55° C. and stirred for one hour. After the completion of stirring, the solution was left standing for 30 minutes to remove a water phase. Then, 300 g of pure water was added into the resulting polymer solution and the mixture was stirred for 30 minutes. After stopping agitation, the mixture was left standing for 30 minutes, and then a water phase was removed. The above-described washing operation with water was further repeated two times. The resulting polymer solution was a solution with extremely high transparency. The solvent was removed by distillation from the resultant polymer solution, and the resultant mixture was dried in a vacuum drier at 80° C. for 24 hours to obtain an isobutylene block copolymer solid. Measurement...
example 2
[0043] The operation was carried out in the same manner as in Example 1 except that Newcol-561H as a nonionic surfactant was replaced with Newcol-80 (from Nippon Nyukazai Co., Ltd.; HLB=6.4), which is a polyoxyethylene sorbitan derivative.
PUM
| Property | Measurement | Unit |
|---|---|---|
| temperature | aaaaa | aaaaa |
| temperature | aaaaa | aaaaa |
| temperature | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More