Method for producing carboxyl-terminated polyisobutenes

Details Method for producing carboxyl-terminated polyisobutenes Method for producing carboxyl-terminated polyisobutenes

2004-05-14

2009-08-25

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S387000, C525S388000

Reexamination Certificate

active

07579412

ABSTRACT:
The present invention relates to a process for preparing carboxyl-terminated polyisobutenes by ozonolysis of polyisobutenes terminated by an ethylenically unsaturated double bond.

REFERENCES:
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patent: 01/55229 (2001-08-01), None
Kwon et al. “Synthesis and Characterization of Poly(isobutylene-b-pivalolactone) Diblock and Poly(pivalolactone-b-isobutylene-b-pivalolactone) Triblock Copolymers”, Macromolecules, vol. 35, pp. 3348-3357 2002.
Nemes et al. “Oxyethylation and carbonation of telechelic polyisobutylene anions”, Polymer Bulletin, vol. 24, pp. 187-194 1990.
Storey et al. “Synthesis and Characterization of beta, beta-Dimethyl-Branched Carboxylic Acid-Terminated Polyisobutylenes”, Polym. Prepr., vol. 38, No. 2, pp. 283-284 1997.

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