Patents by Inventor Daniel P. Wang

Daniel P. Wang 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).

  • Publication number: 20240076518
    Abstract: The present disclosure describes a method of manufacturing a one-component coating composition. The method can include combining a water-containing additive with a non-reactive resin to form a grinding dispersion. The method can also include grinding the grinding dispersion to a Hegman value of at least 4 to form a ground dispersion. A drying agent can then be added to form a dried slurry. A silane-modified polyurea can be added to the dried slurry to form a one-component coating composition.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 7, 2024
    Inventors: Daniel P. WANG, Kurt E. BEST, Joseph R. KLEER, John F. BRANDT
  • Publication number: 20230331901
    Abstract: A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than ?30° C. based on a Differential Scanning calorimetry (2nd Heating) temperature scan from ?100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.
    Type: Application
    Filed: June 20, 2023
    Publication date: October 19, 2023
    Inventors: Kurt E. Best, Daniel P. Wang, Joseph Kleer
  • Patent number: 11732083
    Abstract: A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The first cycloaliphatic polyisocyanate can have an NCO % of from 12 wt % to 20 wt % based on ISO 11909:2007. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than ?30° C. based on a Differential Scanning Calorimetry (2nd Heating) temperature scan from ?100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: August 22, 2023
    Assignee: Covestro LLC
    Inventors: Kurt E. Best, Daniel P. Wang, Joseph Kleer
  • Publication number: 20220356369
    Abstract: A coating composition can include an aliphatic polyisocyanate and a polyaspartate combined at an equivalent ratio of from 0.9 to 1.8, the aliphatic polyisocyanate having an NCO % of from 6 wt % to 25 wt % based on ISO 11909:2007. The coating composition can also include a pigment at a pigment to binder ratio of from 0.05 to 1.3, a drying agent in an amount of from 0.5 wt % to 5 wt % based on a total weight of the coating composition, and a bismuth compound. The coating composition can have a total solvent content of less than or equal to 250 g/L.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 10, 2022
    Inventors: Kurt E. Best, Daniel P. Wang, John F. Brandt
  • Publication number: 20220154037
    Abstract: Provided is a polyaspartic composition comprising a reaction product of a polyamine with a Michael addition receptor, a pigment, and from >0% to ?3% of a phosphoric acid ester dispersant, wherein the percentage is calculated as (weight of dispersant solids/weight of pigment solids)×100. The inventive polyaspartic compositions may be reacted with a polyisocyanate to provide coatings, adhesives, sealants, composites, castings, and films having a stable initial gloss. Also provided is a method of increasing 60° gloss in a cured polyurea or polyurethane composition, the method comprising reacting a polyisocyanate with the inventive polyaspartic composition to form a reaction product and curing the reaction product, wherein 60° gloss of the cured polyurea or polyurethane composition is ?80%. The high 60° gloss is maintained over at least one-week, and in some cases over at least four weeks, at 40° C. and 80% relative humidity.
    Type: Application
    Filed: November 19, 2020
    Publication date: May 19, 2022
    Inventors: Charles Todd Williams, Joseph Kleer, Ahren Olson, Daniel P. Wang
  • Publication number: 20220153916
    Abstract: A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The first cycloaliphatic polyisocyanate can have an NCO % of from 12 wt % to 20 wt % based on ISO 11909:2007. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than ?30° C. based on a Differential Scanning Calorimetry (2nd Heating) temperature scan from ?100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.
    Type: Application
    Filed: November 19, 2020
    Publication date: May 19, 2022
    Inventors: Kurt E. Best, Daniel P. Wang, Joseph Kleer
  • Publication number: 20220089901
    Abstract: A coating composition can include an aliphatic polyisocyanate having an NCO % of greater than or equal to 6 wt % to less than 22 wt % based on ISO 11909:2007 combined with a polyaspartate at an equivalent ratio of from 0.9 to 5. The coating composition can also include a metal additive in an amount of from 0.03 wt % to 0.5 wt % based on a total weight of the coating composition. The coating composition can have a total solvent content of less than or equal to 200 g/L and has an average viscosity build rate of less than 0.5 KU/min. The coating composition cures to form a coating having a haze value of less than or equal to 5 haze units based on ASTM E430-19.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 24, 2022
    Inventors: Daniel P. Wang, Kurt E. Best
  • Publication number: 20220089902
    Abstract: A coating composition can include an aliphatic polyisocyanate and a polyaspartate combined at an equivalent ratio of from 0.9 to 1.8, the aliphatic polyisocyanate having an NCO % of from 6 wt % to 25 wt % based on ISO 11909:2007. The coating composition can also include a pigment at a pigment to binder ratio of from 0.05 to 1.3 and a drying agent in an amount of from 0.5 wt % to 5 wt % based on a total weight of the coating composition. The coating composition can have a total solvent content of less than or equal to 250 g/L.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 24, 2022
    Inventors: Daniel P. Wang, Kurt E. Best
  • Publication number: 20210238443
    Abstract: A polyisocyanate composition can include an aliphatic polyisocyanate resin having a weight average molecular weight of from 1000-6000 g/mol based on gel permeation chromatography. The aliphatic polyisocyanate resin can include a blend of at least two different aliphatic polyisocyanates and can include less than 50 wt % of a cycloaliphatic polyisocyanate based on a total weight of the aliphatic polyisocyanate resin. The polyisocyanate composition can have an NCO % of from 2 wt % to 18 wt % based on ISO 11909:2007. The polyisocyanate composition can include from 84 wt % to 100 wt % solids.
    Type: Application
    Filed: June 8, 2020
    Publication date: August 5, 2021
    Inventors: Daniel P. Wang, Kurt E. Best