Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-01-18
2005-01-18
Teskin, Fred (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S059000, C526S339000, C356S051000
Reexamination Certificate
active
06844411
ABSTRACT:
The present invention is relates to a process for the preparation of an isoolefin polymer containing repeating units derived from at least one isoolefin, at least one divinyl aromatic monomer and, optionally, additional copolymerizable monomers, wherein the content of unreacted vinyl groups from the aromatic monomer is predicted by means of FTIR measurements.The present invention is related to a process for the preparation of an isoolefin polymer comprising repeating units derived from at least one isoolefin, at least one divinyl aromatic monomer and, optionally, further copolymerizable monomers, wherein the content of unreacted vinyl groups from the aromatic monomer is predicted by means of FTIR measurements and said prediction is subsequently used to alter at least one process parameter.
REFERENCES:
patent: 3584080 (1971-06-01), Walker et al.
patent: 6534611 (2003-03-01), Darling et al.
Ullmanns Encyclopedia of Industrial Chemistry, vol. A 23, (month unavailable) 1993, pp. 288-295, Rubber, 3, Synthetic.
Rubber Chem. Technol. 42, Feb. 1969, pp. 1147-1154, C.E. Oxley and G.J. Wilson, “A Peroxide Curing Butyl Rubber”.
Gronowski Adam
Kaszas Gabor
Syme Dave
Watson Kenneth Norman
Akorli Godfried R.
Bayer Inc.
Seng Jennifer R.
Teskin Fred
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