Invention Grant
- Patent Title: Preparation method for polyurethane optical resin and applications thereof
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Application No.: US17608393Application Date: 2020-07-20
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Publication No.: US12024582B2Publication Date: 2024-07-02
- Inventor: Jianfeng Li , Yonghua Shang , Qian Wu , Fulin Zhu , Peng Wang , Hao Chen , Peimeng Shi , Weiqi Hua , Yuan Li
- Applicant: WANHUA CHEMICAL GROUP CO., LTD. , WANHUA CHEMICAL (NINGBO) CO., LTD.
- Applicant Address: CN Shangdong
- Assignee: WANHUA CHEMICAL GROUP CO., LTD.,WANHUA CHEMICAL (NINGBO) CO., LTD.
- Current Assignee: WANHUA CHEMICAL GROUP CO., LTD.,WANHUA CHEMICAL (NINGBO) CO., LTD.
- Current Assignee Address: CN Shangdong; CN Zhejiang
- Agency: Norton Rose Fulbright US LLP
- Agent James R. Crawford
- Priority: CN 1910687252.9 2019.07.29
- International Application: PCT/CN2020/103019 2020.07.20
- International Announcement: WO2021/017921A 2021.02.04
- Date entered country: 2021-11-02
- Main IPC: C07D251/00
- IPC: C07D251/00 ; C08G18/24 ; C08G18/38 ; C08G18/75 ; C08G18/76 ; C08K5/521 ; G02B1/04
Abstract:
Preparation method for a polyurethane optical resin and applications thereof. The preparation method for the polyurethane optical resin comprises: a raw material composition comprising isocyanate and a polythiol compound undergoes a polymerization to produce the polyurethane optical resin. The turbidity value of the isocyanate used in the raw material composition is controlled at ≤2 NTU. The polyurethane optical resin produced is applicable in manufacturing optical products.
Public/Granted literature
- US20220227915A1 PREPARATION METHOD FOR POLYURETHANE OPTICAL RESIN AND APPLICATIONS THEREOF Public/Granted day:2022-07-21
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