Patents by Inventor Willibald Paar

Willibald Paar 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: 4942196
    Abstract: Cathodically depositable electrodeposition paints contain binder combinations of cationic film-forming resins with organic titanium compounds which are obtained by reacting tetraalkyl orthotitanates or titanium acetyl acetonates with compounds containing at least one phenolic hydroxyl group. The stoved paint films exhibit an excellent anticorrosion effect on non-pretreated sheet steel.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: July 17, 1990
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Rudolf Schipfer, Johann Gmoser
  • Patent number: 4892913
    Abstract: Crosslinking components for cationic paint binders wherein substituted ureas obtained by reacting beta-hydroxyamines with isocyanate compounds are converted into biuret compounds by further reaction with isocyanates. The cross-linking components thus obtained, when combined with base resins containing hydroxyl groups and/or primary or secondary amino groups, yield films having an increased hardening capacity and greater resistance to stone chipping.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: January 9, 1990
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4857581
    Abstract: Cationic paint binders obtained through reaction of substituted ureas with formaldehyde and phenols are described. The substituted ureas are obtained through reaction of an isocyanate compound carrying at least one free, and optionally also blocked, NCO-group with equivalent quantities of a secondary non-aromatic amine. After partial protonation, the binders are used in water-dilutable paints, particularly in cathodically depositable electrodeposition paints.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: August 15, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Anton Arzt
  • Patent number: 4851486
    Abstract: Self-crosslinking cationic paint binders based on ureide-modified epoxy resins; the preparation of these binders and their use, particularly in electrodeposition paints, is described. The modification is effected with carboxylic compounds carrying ureide groups, blocked isocyanate groups and, optionally, tertiary amino groups. The carboxylic compounds are obtained through reaction of dicarboxylic acid anhydrides or compounds carrying dicarboxylic acid anhydrides with a substituted urea or a substituted biuret. The products show excellent resistance and adhesion characteristics.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: July 25, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4845170
    Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea group carrying reaction products of modified phenols and epoxy resins as well as with the binders produced according to the process and their use in stoving paints, particularly in electrodeposition paints is described. The process is characterized in that either an aminoalkylation product of a phenol and a semi-blocked diisocyanate carrying an average of at least one secondary amino group, or a substituted urea prepared from a semi-blocked diisocyanate and an amine, which is further reacted with formaldehyde and a phenol, are reacted with an epoxy compound. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C., give films with excellent corrosion resistance and adhesion.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: July 4, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Michael Honel, Johann Gmoser
  • Patent number: 4845171
    Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea and urethane group carrying reaction products of modified phenols and monoepoxy compounds as well as with the binders produced according to this process and their use in stoving paints, particularly electrodeposition paints are described. The process is characterized in that a substituted urea-phenol-formaldehyde condensate obtained through reaction of an aminoalkylation product of a phenol, carrying an average of at least one secondary amino group with a semi-blocked diisocyanate, or a substituted urea prepared from a semi-blocked diisocyanate and an amine and further reacted with formaldehyde and a phenol, is reacted with a monoepoxy compound, the free aliphatic hydroxy groups of the reaction product being reacted in a further reaction step with di- or polyisocyanates. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: July 4, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Johann Gmoser, Willibald Paar, Michael Honel
  • Patent number: 4837291
    Abstract: Cationic paint binders, water-dilutable upon protonation, which crosslink internally at elevated temperatures are obtained through reaction of beta-hydroxyamines of the general formula- ##STR1## wherein R.sub.1 is a (cyclo)alkyl radical and/or a hydroxyalkyl radical and/or a tertiary amino(cyclo)alkyl radical, or optionally a radical resulting from the reaction of glycidyl groups with a primary-secondary amine or a diprimary amine and R.sub.2 is an aliphatic and/or aromatic radical of a polyepoxy compound, with partially blocked polyisocyanates and subsequent reaction with formaldehyde. In addition to having excellent film properties, the products show particularly favorable characteristics for processing, since they do not exhibit the thixotropy effects normal with such systems. The products are particularly suited for the formulation of cathodically depositable electrodeposition paints.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: June 6, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4808688
    Abstract: Self-crosslinking paint binders, water-soluble upon protonation, containing biuret groups are described based on reaction products of blocked isocyanate groups containing aminoalkylation products of phenols with 0.1 to 1.0 moles, calculated on the hydrogen atoms at the urea groupings, of a semi-blocked diisocyanate. Optionally the phenolic hydroxy groups can be totally or partially reacted with epoxy compounds. The products are particularly suited for the formulation of high-grade, corrosion-resistant electrodeposition paints.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: February 28, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4801661
    Abstract: Self-crosslinking paint binders, particularly for the formulation of water-dilutable, cathodically depositable paints (CED-paints), are obtained through reaction of formaldehyde with the reaction product of aminoalkylation products of phenols carrying at least one NH-group and semi-blocked diisocyanates and their subsequent reaction with epoxy compounds. The binders, when cathodically deposited, cure rapidly at low stoving temperatures to provide hard, solvent-resistant coatings.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: January 31, 1989
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4789696
    Abstract: Cationic paint binders, particularly binders of the type used in cathodic electrodeposition coatings which crosslink through transesterification, transamidation, transurethanization, or through the reaction of chain end double bonds catalyzed with a condensation product of a dialkyltinoxide and a compound carrying at least one hydroxyl group are described. The hydroxyl compounds are the aliphatic alcohols, phenols, alkanolamines, or the reaction products of primary amines with monoepoxy compounds. The catalysts of the invention provide very good stability and good compatibility in aqueous cationic paint materials.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: December 6, 1988
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Johann Gmoser
  • Patent number: 4777225
    Abstract: A process for producing self-crosslinking paint binders, water-soluble on protonation, based on the reaction product of aminoalkylation product carrying blocked isocyanate groups, NH-functional compounds, particularly of adducts of primary amines to diepoxy resins, and formaldehyde is described. The products produced according to the process are particularly suited for the formulation of high quality electrodeposition paints.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: October 11, 1988
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4757113
    Abstract: Cationic water-dilutable binders which are particularly useful in cathodically depositable coating compositions, which are crosslinked with polyisocyanate compounds, which are partially or totally blocked with enamines of C-H-active dicarbonyl compounds and a process for their preparation are described. Paints formulated on the basis of the described binders can be cured at temperatures at from 120.degree. C. to provide resistant films.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: July 12, 1988
    Assignee: Vianova Kunstharz, A. G.
    Inventor: Willibald Paar
  • Patent number: 4734520
    Abstract: Crosslinking components for hydroxy and/or primary and/or secondary amino group containing paint binders for the crosslinking of synthetic resins carrying at least two groups capable of ester or amide formation with carboxylic acids. In particular there is disclosed the use of the crosslinking components in compositions for electrodeposition (ED) whereby at 120.degree. C. and above coatings with extraordinary paint performance are obtained. The use of methyl or ethyl esters gives extremely low condensation losses. The crosslinking components are obtained through reaction of one mole of a diisocyanate, preferably at room temperature, in the presence of sodium, or preferably sodium phenolate, as catalyst, with at least one mole of a CH-active alkyl ester of the general formula X--CH.sub.2 --COOR, wherein X is --COOR, --CN or CH.sub.3 --CO-- and R is an alkyl radical with 1 to 8 C-atoms and subsequent reaction of the free isocyanate groups with polyamines of the general formula H.sub.2 N--(R--NH).sub.n --R--NH.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: March 29, 1988
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Helmut Plum, Willibald Paar
  • Patent number: 4727098
    Abstract: Modified cationic epoxy resins wherein phenols linked through modified urea groups are used to extend the chain of diepoxy resins are described. The modified cationic resins can be formulated as paints which exhibit excellent properties particularly when used for electrodeposition paints.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: February 23, 1988
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Michael Honel
  • Patent number: 4711934
    Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea group carrying reaction products of modified phenols and epoxy resins as well as with the binders produced according to the process and their use in stoving paints, particularly in electrodeposition paints is described. The process is characterized in that either an aminoalkylation product of a phenol and a semi-blocked diisocyanate carrying an average of at least one secondary amino group, or a substituted urea prepared from a semi-blocked diisocyanate and an amine, which is further reacted with formaldehyde and a phenol, are reacted with an epoxy compound. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C., give films with excellent corrosion resistance and adhesion.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: December 8, 1987
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Michael Honel, Johann Gmoser
  • Patent number: 4711937
    Abstract: Self-crosslinking paint binders, particularly for the formulation of water-dilutable, cathodically depositable paints (CED-paints), are obtained through reaction of formaldehyde with the reaction product of aminoalkylation products of phenols carrying at least one NH-group and semi-blocked diisocyanates and their subsequent reaction with epoxy compounds. The binders, when cathodically deposited, cure rapidly at low stoving temperatures to provide hard, solvent-resistant coatings.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: December 8, 1987
    Assignee: Vianova Kunstharz, A.G.
    Inventor: Willibald Paar
  • Patent number: 4711935
    Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea and urethane group carrying reaction products of modified phenols and monoepoxy compounds as well as with the binders produced according to this process and their use in stoving paints, particularly electrodeposition paints are described. The process is characterized in that a substituted urea-phenol-formaldehyde condensate obtained through reaction of an aminoalkylation product of a phenol, carrying an average of at least one secondary amino group with a semi-blocked diisocyanate, or a substituted urea prepared from a semi-blocked diisocyanate and an amine and further reacted with formaldehyde and a phenol, is reacted with a monoepoxy compound, the free aliphatic hydroxy groups of the reaction product being reacted in a further reaction step with di- or polyisocyanates. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: December 8, 1987
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Johann Gmoser, Willibald Paar, Michael Honel
  • Patent number: 4684702
    Abstract: Cathodically depositable self-crosslinking binders for electrodeposition having a substantially water-insoluble component which is a derivative of a dioxazolidine which carries chain-end or side-chain unsaturated double bonds are described. The binders have favorable wetting properties and emulsifying characteristics, as well as excellent film characteristics in the finished coatings.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: August 4, 1987
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Georg Pampouchidis, Helmut Honig
  • Patent number: 4683285
    Abstract: The invention is directed to a process for the production of cationic binders for pigment pastes for water-dilutable paints, particularly for cathodic electrodeposition based on low molecular oxazolidine group carrying modified epoxy compounds, and to the pastes obtained. The process is characterized in that preferably aliphatic di- or polyepoxy compounds are reacted with primary mono- and/or diamines and optionally monocarboxy compounds and that oxazolidine groups are introduced into the molecule by reaction with carbonyl compounds. The products show extremely high pigment loading capacity and an excellent performance in cathodically depositable electrodeposition paints. The products permit formation of low solvent paint systems.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: July 28, 1987
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Helmut Honig
  • Patent number: 4579932
    Abstract: Cationic epoxy resin esters suitable as binders for stoving coating compositions, particularly for application by electrodeposition, and as mill base resins for grinding pigments and extenders; and a process for producing same is described. The resin esters are produced through reaction of a resinous compound carrying at least two 1,2-epoxy groups with carboxylic acids and, optionally, with primary and/or secondary alkyl- and/or alkanolamines. The carboxylic acid employed, totally or partially, is the reaction product of a dicarboxylic acid anhydride and a tertiary amine which has the structure - ##STR1## wherein R and R.sub.x are a hydrogen atom or an alkyl radical or an aryl radical which may be substituted, R.sub.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: April 1, 1986
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Willibald Paar, Helmut Honig