Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
April 22, 2008
Patent Application Number
10474306
Date Filed
March 15, 2002
Patent Primary Examiner
Patent abstract
A dispersant comprising a polyester chain obtainable by polymerising a hydroxy carboxylic acid or lactone thereof such as E-caprolactone with a cyclic alkylene carbonate such as 5,5-dimethyltrimethylene carbonate. The dispersant may be in the form of a phosphate ester where the polyester chain is reacted with a phosphating agent such as polyphosphoric acid or the polyester chain may be attached to a polyamine or polyimine such as polyethyleneimine.
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