The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
Jul. 22, 2020
Wanhua Chemical Group Co., Ltd., Shandong, CN;
Wanhua Chemical (Ningbo) Co., Ltd., Zhejiang, CN;
Zhicheng Zhu, Shandong, CN;
Bin Shi, Shandong, CN;
Chengyue Yan, Shandong, CN;
Bing Zheng, Shandong, CN;
Li Li, Shandong, CN;
Yonghua Shang, Shandong, CN;
Wei Liu, Shandong, CN;
Haijun Li, Shandong, CN;
Nuancheng Wang, Shandong, CN;
Yuan Li, Shandong, CN;
WANHUA CHEMICAL GROUP CO., LTD., Shandong, CN;
WANHUA CHEMICAL (NINGBO) CO., LTD., Zhejiang, CN;
Abstract
The present application provides a storage-stable polyisocyanate composition and a preparation method. The polyisocyanate composition is obtained by selecting one or more diisocyanate from aliphatic diisocyanates and alicyclic diisocyanates, and reacting same with an alcohol compound; the polyisocyanate composition contains an isocyanurate group, a uretdione group, a carbamate group, and an allophanate group; within the polyisocyanate composition, the molar ratio of the carbamate group/(uretdione group+isocyanurate group) is 0.01-0.2, and preferably 0.01-0.1. Compared to existing techniques, the present application has the advantage of a noticeable increase in system viscosity of uretdione polyisocyanate during storage. With the present application, by means of controlling the ratio of the carbamate group/(uretdione group+isocyanurate group) within the system, the increase in viscosity of a product during storage is inhibited, thereby improving the storage stability of the product.