Process of developing posi-type lithographic printing plate with inorganic alkali solution
Photosensitive composition admixture of a diazonium salt polycondensation product and polymeric binder with carboxyl side chain groups Patent #: 4631245
ApplicationNo. 06/871343 filed on 06/06/1986
US Classes:430/175, Polymeric diazonium compound430/176Polymeric mixture
ExaminersPrimary: Michl, Paul R.
Assistant: Stevenson, Terri
Attorney, Agent or Firm
International ClassesG03F 7/021 (20060101)
G03F 7/016 (20060101)
C08F 8/00 (20060101)
Foreign Application Priority Data1985-06-07 JP
AbstractA light-sensitive composition comprising a diazonium compound and a polymer having the recurring units represented by the following general formula (I): ##STR1## wherein R1 represents a hydrogen atom or a substituted or unsubstituted alkyl group; R2 represents an unsubstituted alkyl group; R3 represents an aliphatic or aromatic hydrocarbon group having a carboxyl group; R4 represents an aliphatic or aromatic hydrocarbon group which has at least one hydroxyl or nitrile group and which may be further substituted; n1, n2, n3, n4 and n5 represent the molar percents of the respective recurring units, provided that n1 is from about 5 to about 85 mol %, n2 is from 0 to about 60 mol %, n3 is from 0 to about 20 mol %, n4 is from about 3 to about 60 mol % and n5 is from greater than 0 to about 60 mol %.