Patents by Inventor Hellmuth Kasch

Hellmuth Kasch 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).

  • Water-dilutable resins, process for preparing them, and their use
    Patent number: 6114434
    Abstract: Resins AB which are dilutable in water following neutralization and have an acid number of from 25 to 160 mg/g, obtainable by reacting mass fractions, based in each case on the sum of the masses of the solids in the reaction mixture, of A from 30 to 90% of at least one acid-functional polymer selected from polyesters, dimerized and oligomerized unsaturated aliphatic carboxylic acids and polymers of olefinically unsaturated monomers, each having an acid number of from 30 to 240 mg/g, and B from 10 to 70% of at least one water-insoluble aldehyde resin or ketone resin obtainable by condensing ketones, ketones together with aldehydes, ketones with urea or aldehydes with urea, having a hydroxyl number from 20 to 300 mg/g, a softening point of from 60 to 140.degree. C. and a number-average molar mass of from 500 to 3000 g/mol.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: September 5, 2000
    Assignee: Vianova Resins AG
    Inventors: Peter Tuemmler, Gerald Hobisch, Hellmuth Kasch
  • Urea-aldehyde polycondensates, preparation thereof and use thereof as surface coating binders
    Patent number: 4906727
    Abstract: Urea-aldehyde polycondensates usable as surface coating binders are obtainable by step-wise reaction of(a) urea and/or urea derivatives with acidic CH aldehydes in a molar ratio of urea:aldehyde of 1:2 in the presence of acids and at from 60.degree. to 120.degree. C. with(b) a mixture of 3 moles of formaldehyde per mole or urea and 3 moles of an acidic CH aldehyde per mole of urea at from 60.degree. to 120.degree. C. with subsequent removal of the water of reaction and treatment of the reaction mixture with an alkali metal alcoholate at from 80.degree. to 100.degree. C.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: March 6, 1990
    Assignee: Basf Aktiengesellschaft
    Inventors: Kurt Fischer, Harro Petersen, Hellmuth Kasch, Horst Schmidt
  • Preparation of aqueous dispersions of condensates of urea and CH-acidic aldehydes, and production of surface coating binders
    Patent number: 4663379
    Abstract: A process for the preparation of stable aqueous aldehyde resin dispersions and for the production of surface coating binders.For this purpose, a melt or highly concentrated solution of a polycondensate of urea and a CH-acidic aldehyde, with or without formaldehyde, is dispersed in water in the presence of an organic protective colloid and, if required, an emulsifier.These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: May 5, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Fischer, Harro Petersen, Werner Loch, Hellmuth Kasch, Eckehardt Wistuba
  • Preparation of aqueous ketone resin or ketone/aldehyde resin dispersions, and production of surface-coating binders
    Patent number: 4644028
    Abstract: A process for the preparation of a stable aqeuous ketone resin or ketone/aldehyde resin dispersions and a process for the production of surface coating binders. For this purpose, a melt or a highly concentrated solution of the ketone resin or ketone/aldehyde resin is dispersed in water in the presence of an organic protective colloid. These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: February 17, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Fischer, Harro Petersen, Hellmuth Kasch, Eckehardt Wistuba