Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2007-08-21
2007-08-21
Richter, Johann (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C554S037000, C564S153000
Reexamination Certificate
active
11290328
ABSTRACT:
Disclosed is a process for preparing a compound of the formulawherein R1is an alkyl group having at least one ethylenic unsaturation, an arylalkyl group having at least one ethylenic unsaturation, or an alkylaryl group having at least one ethylenic unsaturation, R2and R3each, independently of the others, are alkylene groups, arylene groups, arylalkylene groups, or alkylarylene groups, and n is an integer representing the number of repeat amide units and is at least 1, said process comprising: (a) reacting a diacid of the formulain-line-formulae description="In-line Formulae" end="lead"?HOOC—R2—COOHin-line-formulae description="In-line Formulae" end="tail"?with a diamine of the formulain the absence of a solvent while removing water from the reaction mixture to form an acid-terminated oligoamide intermediate; and (b) reacting the acid-terminated oligoamide intermediate with a monoalcohol of the formulain-line-formulae description="In-line Formulae" end="lead"?R1—OHin-line-formulae description="In-line Formulae" end="tail"?in the presence of a coupling agent and a catalyst to form the product.
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Belelie Jennifer L.
Goredema Adela
Odell Peter G.
Toma Eniko
Byorick Judith L.
Katakam Sudhakar
Richter Johann
Xerox Corporation
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