Star block copolymer and process for the production thereof

Details Star block copolymer and process for the production thereof Star block copolymer and process for the production thereof

C - Chemistry, Metallurgy

08

G

400/2016

C08G 69/40 (2006.01) C08G 65/26 (2006.01) C08G 65/333 (2006.01) C08G 65/42 (2006.01) C08G 69/18 (2006.01)

Patent

CA 1241138

SAO-1-36904C/YT/84. ABSTRACT OF THE DISCLOSURE A novel star block copolymer represented by the general formula as shown below and a process for the produc- tion thereof are described. The copolymer has superior physical properties, particularly impact strength and, further- more, is reduced in coloration. Thus the copolymer can find numerous uses; for example, it can be used in preparation of fibers, foams, automotive parts, and electrical components. The copolymer is produced by copolymerizing a star-shaped polyether prepolymer and a lactam, said prepolymer being prepared by reacting a star-shaped polyoxyalkylene having at least 3 terminal hydroxy groups and an N-chlorocarbonyl lactam in the presence of an anionic polymerization catalyst. Image In this formula, all the symbols are as defined hereinbefore.

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