Esters of maleic anhydride interpolymers
Amphoteric maleic anhydride copolymers and photographic emulsions employing the same
Bioadhesive composition Patent #: 5066709
ApplicationNo. 796996 filed on 11/25/1991
US Classes:525/327.6, Nitrogen containing chemical treating agent other than unsubstituted ammonium as sole nitrogen525/327.4, Polymer derived from carboxylic acid anhydride monomer525/329.6, Butene dioic acid or derivative monomer525/379, Organic amine525/382, Two amine groups526/271, Acid anhydride526/307, Non-amide nitrogen containing526/318.2, Carboxylic acid contains two or more carboxyl groups526/332From monomer containing an ether group
ExaminersPrimary: Schofer, Joseph L.
Assistant: Zitomer, Fred
Attorney, Agent or Firm
International ClassC08F 008/33
AbstractA charge imbalanced composition comprising:(a) about 10 to 90 mole % of an amphoteric copolymer having the formula ##STR1## where R=alkyl C1 -C4,N=1-6,R1 and R2 are independently alkyl C1 -C6, andR3 is H,(b) about 10 to 90 mole % of a polymeric diacid having the formula: ##STR2## where R is as defined above, and(c) less than about 8 mole % of by-product salts which are the dialkylaminoalkylamine salts of (a) and (b).The composition described above is made by:reacting 1 mole of an anhydride compound having the formula ##STR3## where R is as defined above,with less than 1 mole of a compound having the formula ##STR4## where n, R1 and R2 are as defined above, and R3 is H, isolating the product, andhydrolyzing any residual anhydride compound in water to the corresponding diacid compound.