Patents by Inventor Madan M. Bagga

Madan M. Bagga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5152862
    Abstract: Imidazoline compounds of formula ##STR1## where n denotes 2 or 3, is suitable as cure accelerator in curable epoxide resin compositions comprising a latent curing agent.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: October 6, 1992
    Assignee: Ciba-Geigy Corporation
    Inventor: Madan M. Bagga
  • Patent number: 5132374
    Abstract: Adducts of the formula I ##STR1## are described in which R.sup.1 is an e-valent aliphatic radical after the removal of the functional groups, X is --O--or --NH--, R.sup.2 is a d+l-valent carbocyclic-aromatic radical, R.sup.3 is hydrogen or methyl, R.sup.4 is an aliphatic, aromatic, or araliphatic c+l-valent radical, Y is --O--, --S--or --NR.sup.5 --, R.sup.5 is hydrogen or ##STR2## b is an integer from 2 to 15, b is an integer from 1 to 25, c is 1, 2 or 3, d is 1, 2 or 3 and e is 2, 3 or 4.The adducts can be combined with latent curing agents and, if appropriate, other epoxy resins to give adhesives having good stability on storage and high flexibility.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: July 21, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Franz-Josef Reischmann, Madan M. Bagga
  • Patent number: 5021513
    Abstract: Curable compositions comprise(A) a polyglycidyl ether of a polyhydric phenol,(B) a polyglycidyl ether of a polyhydric alcohol,(C) a nitrogen-containing latent hardener for epoxide resins and(D) as cure accelerator dispersed as a powder in the composition, a solid solution of a polymeric phenol with an aliphatic polyamine having two or more amine groups, each of the amine groups being tertiary and at least two of the amine groups being dimethylamino groups.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: June 4, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Madan M. Bagga
  • Patent number: 4997951
    Abstract: Imidazoline compounds of formula ##STR1## where n denotes 2 or 3, is suitable as cure accelerator in curable epoxide resin compositions comprising a latent curing agent.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: March 5, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Madan M. Bagga
  • Patent number: 4977214
    Abstract: Curable compositions comprise(A) a polyglycidyl ether of a polyhydric phenol,(B) a polyglycidyl ether of a polyhydric alcohol,(C) a nitrogen-containing latent hardener for epoxide resins and(D) as cure accelerator dispersed as a powder in the composition, a solid solution of a polymeric phenol with an aliphatic polyamine having two or more amine groups, each of the amine groups being tertiary and at least two of the amine groups being dimethylamino groups.The compositions are useful as adhesives, sealants, laminating resins and coatings.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 11, 1990
    Assignee: Ciba-Geigy Corporation
    Inventor: Madan M. Bagga
  • Patent number: 4866133
    Abstract: Curable liquid compositions comprise(A) a liquid epoxide resin and(B) as curing agent for (A), more than 10% by weight, based on the weight of (A), of a solid solution of a polymeric phenol, such as a polymer of p-vinyl phenol or a phenolic novolak resin, and a polyamine having at least one primary amine group, such as diethylenetriamine or triethylenetetramine, the solid solution (B) being disposed as a powder in the epoxide resin. The compositions are useful as adhesives.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: September 12, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Christopher M. Andrews, Madan M. Bagga
  • Patent number: 4734332
    Abstract: Compositions useful as adhesives, sealants, laminating resins and coatings comprise(a) an epoxide resin(b) a nitrogen-containing latent curing agent for this resin, such as dicyandiamide or isophthalic acid dihydrazide and(c) as accelerator for the cure, and dispersed as a powder in (a) and (b), a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a polymer of an unsaturated phenol.Typical nitrogen bases used in (c) include benzyldimethylamine, 2-methylaminoethanol, isophorone diamine triethylene tetramine, and 2-methylimidazole. Typical polymeric phenols include poly(p-vinylphenol).
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: March 29, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Madan M. Bagga, Christopher H. Bull
  • Patent number: 4713432
    Abstract: Compositions useful as adhesives, sealants, laminating resins and coatings comprise(a) an epoxide resin(b) a nitrogen-containing latent curing agent for this resin, such as dicyandiamide or isophthalic acid dihydrazide and(c) as accelerator for the cure, and dispersed as a powder in (a) and (b), a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a polymer of an unsaturated phenol.Typical nitrogen bases used in (c) include benzyldimethylamine, 2-methylaminoethanol, isophorone diamine triethylene tetramine, and 2-methylimidazole. Typical polymeric phenols include poly(p-vinylphenol).
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: December 15, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Madan M. Bagga, Christopher H. Bull
  • Patent number: 4701378
    Abstract: Adhesion between surfaces of metal, reinforced plastics, glass, friction material or ceramics is effected using an adhesive comprising(a) an epoxide resin(b) a nitrogen-containing latent curing agent for this resin, such as dicyandiamide, isophthalic acid dihydrazide or adipic acid dihydrazide, and(c) as accelerator for the cure, and dispersed as a powder in (a) and (b), a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a phenol-aldehyde resin.Typical nitrogen bases used in (c) include benzyldimethylamine, benzimidazole and 2-methylimidazole. Typical phenolic resins are those prepared from phenol and formaldehyde.
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: October 20, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Madan M. Bagga, Christopher H. Bull
  • Patent number: 4659779
    Abstract: Compositions useful as adhesives, sealants, laminating resins and coatings comprise(a) an epoxide resin(b) a nitrogen-containing latent curing agent for this resin, such as dicyandiamide or isophthalic acid dihydrazide and(c) as accelerator for the cure, and dispersed as a powder in (a) and (b), a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a polymer of an unsaturated phenol.Typical nitrogen bases used in (c) include benzyldimethylamine, 2-methylaminoethanol, isophorone diamine triethylene tetramine, and 2-methylimidazole. Typical polymeric phenols include poly(p-vinylphenol).
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: April 21, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Madan M. Bagga, Christopher H. Bull
  • Patent number: 4284574
    Abstract: New epoxide resins have the formula ##STR1## where R represents a phenylene or naphthylene group, or two or three phenylene groups linked by carbon-carbon bonds, oxygen or sulfur atoms, sulfonyl or sulfoxide groups, or alkylene groups of 1 to 5 carbon atoms, the phenylene or naphthylene group(s) being optionally substituted by chlorine or bromine atoms or lower alkyl groups, andR.sup.1 represents an alkyl group of up to 16 carbon atoms; an alkenyl group of up to 6 carbon atoms; a phenyl, naphthyl, phenylalkyl, or naphthylalkyl group, all optionally substituted by chlorine or bromine atoms, and the phenyl and naphthyl groups in addition optionally by lower alkyl groups; or a cycloalkyl or cycloalkylalkyl group.The products, typical examples of which are 2,2-bis(p-(3-butoxy-2-glycidyloxypropyloxy)phenyl)propane and bis(p-(3-butoxy-2-glycidyloxypropyloxy)phenyl) sulfone, are generally of low viscosity and useful as casting resins.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: August 18, 1981
    Assignee: Ciba-Geigy Corporation
    Inventor: Madan M. Bagga
  • Patent number: 4175173
    Abstract: Powder coating compositions comprise an epoxide resin and a carboxylic acid of formula ##STR1## where R.sup.1 represents a phenylene or naphthylene group or a group comprising 2 or 3 phenylene radicals linked by one or two carbon-carbon bonds, ether oxygen atoms, sulfur atoms, or sulfonyl, sulfoxide, carbonyl or alkylene groups,R.sup.2 represents a saturated alkyl group, a benzenoid group or an aralkyl group, andboth n are the same and represent zero or 1.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: November 20, 1979
    Assignee: Ciba-Geigy Corporation
    Inventors: Madan M. Bagga, Noel S. Moss