Assignee
WANHUA CHEMICAL GROUP CO LTD
CN·58 granted patents·16 pending applications·20 citations·filing 2012–2025
Top patents by PatentIndex Score
74 records- 0187US10814314B2Catalyst for aminating polyether polyol and preparation method thereof and method of preparing polyetheramines using catalyst thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2015·Granted Oct 27, 2020·4 cites·17 claims
- 0280US11291985B2Preparation method for propylene epoxidation catalyst, and application thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Apr 5, 2022·2 cites·22 claims
- 0379US10696574B2Method for treating reverse osmosis concentrated waterWANHUA CHEMICAL GROUP CO LTD·Filed 2016·Granted Jun 30, 2020·2 cites·20 claims
- 0478US11795265B2Macromonomeric stabilizer, preparation method thereof, and method for preparing polymeric polyolWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Oct 24, 2023·1 cites·18 claims
- 0576US9975985B2Polyisocyanate modified with sulphamic acid, preparation method thereof and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2013·Granted May 22, 2018·4 cites·18 claims
- 0673US11118000B2Polyurethane or polyurethane-urea aqueous dispersion, preparation method therefor, and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2016·Granted Sep 14, 2021·1 cites·20 claims
- 0773US10898883B2Silicalite-1 molecular sieve-based catalyst and preparation method for 1,2-pentanediol using said catalystWANHUA CHEMICAL GROUP CO LTD·Filed 2017·Granted Jan 26, 2021·1 cites·21 claims
- 0872US10226758B2Method for preparing catalyst used for preparing chlorine, catalyst and method for preparing chlorineWANHUA CHEMICAL GROUP CO LTD·Filed 2014·Granted Mar 12, 2019·2 cites·12 claims
- 0971US9701624B2Method for preparing biuret polyisocyanateWANHUA CHEMICAL GROUP CO LTD·Filed 2014·Granted Jul 11, 2017·1 cites·20 claims
- 1071US2025210648A1High-voltage low-cobalt ternary positive electrode material, preparation method therefor, and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2023·Application pending·0 cites
- 1169US2025353959A1Preparation method for low-color number, low-odor polyisocyanate curing agentWANHUA CHEMICAL GROUP CO LTD·Filed 2023·Application pending·0 cites
- 1268US9580380B2Method for preparing diamino-dicyclohexyl methaneWANHUA CHEMICAL GROUP CO LTD·Filed 2013·Granted Feb 28, 2017·1 cites·19 claims
- 1367US2026028446A1Isocyanate composition, modified composition and polyurethane elastomerWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Application pending·0 cites
- 1465US2024166795A1Xylylene diisocynate composition, preparation method therefor and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Application pending·0 cites
- 1565US2025145787A1Preparation method for thermally expandable microsphere containing hydrophilic organic-modified colloidal silicon dioxideWANHUA CHEMICAL GROUP CO LTD·Filed 2024·Application pending·0 cites
- 1663US11597796B2Ionic aqueous epoxy curing agent, preparation method therefor and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2019·Granted Mar 7, 2023·0 cites·20 claims
- 1763US2024318009A1Polymer composite, preparation method therefor and application thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2021·Application pending·0 cites
- 1862US9845281B2Method for preparing hydroxyethyl (meth) acrylateWANHUA CHEMICAL GROUP CO LTD·Filed 2014·Granted Dec 19, 2017·1 cites·24 claims
- 1962US2026092032A1Isophorone diisocyanate composition and blocked product thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Application pending·0 cites
- 2062US2019337802A1Process of Producing Chlorine GasWANHUA CHEMICAL GROUP CO LTD·Filed 2019·Application pending·0 cites
- 2161US12304993B2Storage-stable polyisocyanate composition and preparation methodWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted May 20, 2025·0 cites·19 claims
- 2259US2024351236A1Preparation method for veneer manufactured boardWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Application pending·0 cites
- 2358US12202792B2Preparation method for optically active citronellalWANHUA CHEMICAL GROUP CO LTD·Filed 2019·Granted Jan 21, 2025·0 cites·19 claims
- 2458US11034651B2Light colored modified isocyanate mixture and preparation method thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Jun 15, 2021·0 cites·20 claims
- 2558US9926259B1Catalyst for fixed bed aniline rectification residue recycling and preparation methodWANHUA CHEMICAL GROUP CO LTD·Filed 2017·Granted Mar 27, 2018·0 cites·6 claims
- 2657US12559453B2Sulfonic acid-modified polyisocyanate and preparation method thereforWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Granted Feb 24, 2026·0 cites·20 claims
- 2757US10576465B2Catalyst for preparing chlorine by oxidation of hydrogen chloride and preparation thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2017·Granted Mar 3, 2020·0 cites·12 claims
- 2857US2025154312A1Hydrophilically modified polyisocyanate, and preparation method therefor and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2022·Application pending·0 cites
- 2956US12264121B21,3-bisisocyanatomethylcyclohexane composition and optical resin prepared therefromWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted Apr 1, 2025·0 cites·11 claims
- 3056US11780954B2Modified polyether polyol and use thereof in polyurethane foam materialsWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Oct 10, 2023·0 cites·16 claims
- 3155US11945775B2Stable dispersant and application thereof in preparing copolymer polyolsWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Apr 2, 2024·0 cites·7 claims
- 3254US11939280B2Method for preparing isophorone diisocyanateWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Mar 26, 2024·0 cites·20 claims
- 3354US11918987B2Preparation method for propylene epoxidation catalyst and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted Mar 5, 2024·0 cites·15 claims
- 3454US11045794B2Supported catalyst used for synthesizing polyether amine, and manufacturing methodWANHUA CHEMICAL GROUP CO LTD·Filed 2016·Granted Jun 29, 2021·0 cites·20 claims
- 3554US9399582B2Catalyst for preparing phosgene and method for preparing phosgene using the sameWANHUA CHEMICAL GROUP CO LTD·Filed 2014·Granted Jul 26, 2016·0 cites·9 claims
- 3654US2025197555A1Isocyanate composition, modified isocyanate, polyurethane resin and optical materialWANHUA CHEMICAL GROUP CO LTD·Filed 2025·Application pending·0 cites
- 3754US2023272151A1Storage-stable polyisocyanate composition and preparation method thereforWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Application pending·0 cites
- 3853US11059772B2Imine-type quaternary ammonium salt catalyst, preparation method thereof and use thereof for preparation of polyisocyanate compositionWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Jul 13, 2021·0 cites·12 claims
- 3953US11000837B2Catalyst for preparing chlorine gas by hydrogen chloride oxidation, and preparation method and application thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2016·Granted May 11, 2021·0 cites·20 claims
- 4052US12516191B2Isocyanurate-containing polyisocyanate composition with stable chromaticity, and preparation method thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted Jan 6, 2026·0 cites·15 claims
- 4152US2022298293A1Aliphatic polyisocyanate composition, preparation method therefor, and coating compositionWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Application pending·0 cites
- 4251US2023374194A1Polyisocyanate composition, preparation method therefor and application thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Application pending·0 cites
- 4350US12565557B2Reaction system for preparing polymer polyol and method for preparing polymer polyolWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted Mar 3, 2026·0 cites·19 claims
- 4450US12024582B2Preparation method for polyurethane optical resin and applications thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2020·Granted Jul 2, 2024·0 cites·5 claims
- 4550US2016207876A1Catalyst used for resource utilization of a fixed bed aniline distillation residue and method for preparing said catalystWANHUA CHEMICAL GROUP CO LTD·Filed 2014·Application pending·0 cites
- 4649US11814339B2Method for preparing isocyanate in gaseous phaseWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Nov 14, 2023·0 cites·18 claims
- 4748US11248085B2Epoxy resin material, preparation method therefor and application thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2017·Granted Feb 15, 2022·0 cites·19 claims
- 4848US10787593B2Emulsifiable isocyanate composition and preparation method and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2015·Granted Sep 29, 2020·0 cites·17 claims
- 4947US12227610B2Aqueous dispersion comprising polyurethane or polyurethane-urea, preparation method therefor and use thereofWANHUA CHEMICAL GROUP CO LTD·Filed 2019·Granted Feb 18, 2025·0 cites·10 claims
- 5047US12122876B2Method for preparing reactive sealant resinWANHUA CHEMICAL GROUP CO LTD·Filed 2018·Granted Oct 22, 2024·0 cites·22 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
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