Preparation of brominated styrenic polymers or resins

Details Preparation of brominated styrenic polymers or resins Preparation of brominated styrenic polymers or resins

2006-12-19

2008-11-04

Lipman, Bernard (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...

C525S333400, C525S356000, C525S357000, C525S358000, C525S359100, C525S359200, C525S359300, C525S359400, C525S359500, C525S359600

Reexamination Certificate

active

07446153

ABSTRACT:
Bromination of styrenic polymer is carried out in a closed reaction system to retain HX coproduct (where HX is HBr or HCl, or both) in the bromination reaction mixture at superatmospheric pressure. Preferably, the reaction mixture which includes the brominated styrenic polymer and substantially all of the HX coproduct formed is discharged into an aqueous quenching medium. By operating in this manner, the reaction is terminated and the brominated styrenic polymer of desired bromine content and substantially all HX coproduct are captured in the same operation, process equipment costs are reduced, and processing of the reaction mixture is facilitated.

REFERENCES:
patent: 3050476 (1962-08-01), Tress et al.
patent: 3071569 (1963-01-01), Hoerger
patent: 4143221 (1979-03-01), Naarmann et al.
patent: 4832873 (1989-05-01), Favstritsky et al.
patent: 5677390 (1997-10-01), Dadgar et al.
patent: 5686538 (1997-11-01), Balhoff et al.
patent: 5767203 (1998-06-01), Ao et al.
patent: 5852131 (1998-12-01), Balhoff et al.
patent: 5852132 (1998-12-01), Dadgar et al.
patent: 5916978 (1999-06-01), Ao et al.
patent: 6113381 (2000-09-01), Gellert et al.
patent: 6207765 (2001-03-01), Ao et al.
patent: 6232393 (2001-05-01), Dadgar et al.
patent: 6232408 (2001-05-01), Dadgar et al.
patent: 6235831 (2001-05-01), Reed et al.
patent: 6235844 (2001-05-01), Dadgar et al.
patent: 6326439 (2001-12-01), Dadgar et al.
patent: 6521714 (2003-02-01), Kolich et al.
patent: 2413408 (1979-07-01), None

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