Patents by Inventor Hans Peter Tschan

Hans Peter Tschan 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: 8747602
    Abstract: A polyurethane adhesive which is useful in bonding porous and non-porous surfaces is provided. The adhesive is especially useful in bonding windshield glass into automotive frames under a variety of environmental conditions, particularly in after market windshield replacement applications. The polyurethane includes at least one urethane prepolymer which is based on at least one thermoplastic polyol. In one embodiment, the urethane prepolymer may be formed from one or more polyisocyanates, one or more polyetherpolyols and one or more thermoplastic polyesterpolyols, wherein the prepolymer has a free isocyanate content of from about 0.6 to about 3.5% by weight, based on the weight of the polyurethane. In another embodiment, a one-part adhesive composition is provided which includes an isocyanate-functional and thermoplastic polyurethane prepolymer having a free isocyanate content of from about 0.6 to about 3.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: June 10, 2014
    Assignee: Sika Technology AG
    Inventors: Steven Rosenberg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Patent number: 8512506
    Abstract: An automotive windshield replacement method which includes: a) applying an adhesive to an automotive windshield and/or an automobile body substrate, said adhesive including at least one urethane prepolymer formed from reaction materials including: i) isophorone diisocyanate and/or 4,4?-diphenylmethanediisocyanate; ii) an ethylene oxide-end-capped triol having a weight average molecular weight of about 4500 to about 5000; and iii) hexanediol adipate; b) contacting the substrates together, within the working time of the adhesive, along at least a portion of the substrate(s) to which the adhesive has been applied; and c) allowing the adhesive to bond the substrates together.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: August 20, 2013
    Assignee: Sika Technology AG
    Inventors: Steven A. Rosenberg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Publication number: 20110207895
    Abstract: A polyurethane adhesive which is useful in bonding porous and non-porous surfaces is provided. The adhesive is especially useful in bonding windshield glass into automotive frames under a variety of environmental conditions, particularly in after market windshield replacement applications. The polyurethane includes at least one urethane prepolymer which is based on at least one thermoplastic polyol. In one embodiment, the urethane prepolymer may be formed from one or more polyisocyanates, one or more polyetherpolyols and one or more thermoplastic polyesterpolyols, wherein the prepolymer has a free isocyanate content of from about 0.6 to about 3.5% by weight, based on the weight of the polyurethane. In another embodiment, a one-part adhesive composition is provided which includes an isocyanate-functional and thermoplastic polyurethane prepolymer having a free isocyanate content of from about 0.6 to about 3.
    Type: Application
    Filed: November 22, 2010
    Publication date: August 25, 2011
    Applicant: Sika Technology AG
    Inventors: Steven A. Rosenburg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Publication number: 20110168321
    Abstract: A polyurethane adhesive which is useful in bonding porous and non-porous surfaces is provided. The adhesive is especially useful in bonding windshield glass into automotive frames under a variety of environmental conditions, particularly in after market windshield replacement applications. The polyurethane includes at least one urethane prepolymer which is based on at least one thermoplastic polyol. In one embodiment, the urethane prepolymer may be formed from one or more polyisocyanates, one or more polyetherpolyols and one or more thermoplastic polyesterpolyols, wherein the prepolymer has a free isocyanate content of from about 0.6 to about 3.5% by weight, based on the weight of the polyurethane. In another embodiment, a one-part adhesive composition is provided which includes an isocyanate-functional and thermoplastic polyurethane prepolymer having a free isocyanate content of from about 0.6 to about 3.
    Type: Application
    Filed: December 21, 2010
    Publication date: July 14, 2011
    Applicant: Sika Corporation
    Inventors: Steven A. Rosenberg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Patent number: 7226523
    Abstract: A polyurethane adhesive which is useful in bonding porous and non-porous surfaces is provided. The adhesive is especially useful in bonding windshield glass into automotive frames under a variety of environmental conditions, particularly in after market windshield replacement applications. The polyurethane includes at least one urethane prepolymer which is based on at least one thermoplastic polyol. In one embodiment, the urethane prepolymer may be formed from one or more polyisocyanates, one or more polyetherpolyols and one or more thermoplastic polyesterpolyols, wherein the prepolymer has a free isocyanate content of from about 0.6 to about 3.5% by weight, based on the weight of the polyurethane. In another embodiment, a one-part adhesive composition is provided which includes an isocyanate-functional and thermoplastic polyurethane prepolymer having a free isocyanate content of from about 0.6 to about 3.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: June 5, 2007
    Assignee: Sika Technology AG
    Inventors: Steven A. Rosenberg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Publication number: 20030070741
    Abstract: A polyurethane adhesive which is useful in bonding porous and non-porous surfaces is provided. The adhesive is especially useful in bonding windshield glass into automotive frames under a variety of environmental conditions, particularly in after market windshield replacement applications. The polyurethane includes at least one urethane prepolymer which is based on at least one thermoplastic polyol. In one embodiment, the urethane prepolymer may be formed from one or more polyisocyanates, one or more polyetherpolyols and one or more thermoplastic polyesterpolyols, wherein the prepolymer has a free isocyanate content of from about 0.6 to about 3.5 % by weight, based on the weight of the polyurethane. In another embodiment, a one-part adhesive composition is provided which includes an isocyanate-functional and thermoplastic polyurethane prepolymer having a free isocyanate content of from about 0.6 to about 3.
    Type: Application
    Filed: May 15, 2002
    Publication date: April 17, 2003
    Inventors: Steven A. Rosenberg, Hong Yao, Thomas Bove, Adrian Van Maurik, Hans Peter Tschan, Norman Blank
  • Patent number: 5894071
    Abstract: Two-component adhesive-, sealing- or coating compositions are being described which are separately packed, and comprise the component A and the component D, whereby the component A is curing as soon as it gets in touch with water or the component D which contains the curing agent for the component A.The component D can be, or a component B containing an ingredient which is curing at the contact of water, or, possibly, at the contact with the component A, orthe component D can also be a mixture of solid matter and a volatile ingredient which is causing the cross-linking of the component A.The advantage of the novel two-component systems is that the component D is working as a curing agent for the component A, however, a surplus thereof is, or self-curing, or it does not leave a nuissance residue in the cured composition.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: April 13, 1999
    Assignee: Sika AG, vorm. Kaspar Winkler & Co.
    Inventors: Peter Merz, Norman E. Blank, Hans-Peter Tschan, Reinhard Ernst Wappmann, Lutz Zabel
  • Patent number: 4778845
    Abstract: A one-component adhesive and/or sealing mass which is stable and pumpable at temperatures up to 30.degree. C. containsat least one prepolymer on the basis of a polyurethane, which contains from 0.1 to 15 percent by weight, referred to the prepolymer, of free, reactive isocyanate groups, andat least one with heat activatable hardener.Thereby the stoichiometric ratio between said prepolymer and said hardener is chosen in such a way that only a partial cross-linkage is possible during heating said mass to temperatures from 60.degree. C. to 180.degree. C., and that a product is obtained having from high viscous to plastic characteristics.The inventive masses may be used for bonding and/or sealing of one or more materials of the same or different origin to a composite.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: October 18, 1988
    Assignee: Sika AG, vorm. Kaspar Winkler & Co.
    Inventors: Hans-Peter Tschan, Lutz-Dieter Zabel, Ueli Pfenninger