US 12,434,434 B2
Methods of making chemically resistant sealing components
Cynthia Kutchko, Pittsburgh, PA (US); Eric S. Epstein, Pittsburgh, PA (US); Bryan W. Wilkinson, Pittsburgh, PA (US); Zhisong Huang, San Dimas, CA (US); Sean J. Manion, Los Angeles, CA (US); and Kerianne M. Dobosz, Pittsburgh, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Appl. No. 17/430,151
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
PCT Filed Feb. 10, 2020, PCT No. PCT/US2020/017417
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/167622, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/803,769, filed on Feb. 11, 2019.
Prior Publication US 2022/0097299 A1, Mar. 31, 2022
Int. Cl. B29C 64/194 (2017.01); B29C 64/118 (2017.01); B29C 64/209 (2017.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); F16J 15/44 (2006.01)
CPC B29C 64/194 (2017.08) [B29C 64/118 (2017.08); B29C 64/209 (2017.08); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); F16J 15/44 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of making a chemically resistant sealing component, comprising:
depositing successive layers of a coreactive composition comprising a sulfur-containing prepolymer to form the chemically resistant sealing component, wherein the successive layers of the coreactive composition are deposited in a predetermined shape using three-dimensional printing by extruding the coreactive composition through a nozzle onto a substrate; and
curing the deposited coreactive composition to provide the chemically resistant sealing component;
wherein the chemically resistant sealing component exhibits a glass transition temperature Tg of less than −20° C., determined by dynamic mechanical analysis (DMA) using a dynamic mechanical analyzer with a frequency of 1 Hz, an amplitude of 20 microns, and a temperature ramp of −80° C. to 160° C., with the Tg identified as a peak of the tan δ curve; and
wherein at least one of the deposited successive layers is deposited adjoining one or more previously deposited layers and wherein the depositing of successive layers of the coreactive composition and the curing of the deposited coreactive composition causes adjoining layers of the successively deposited layers to at least one of chemically bond and physically bond.