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. 26, 2026
Filed:
Jan. 22, 2021
Tokuyama Dental Corporation, Tokyo, JP;
Takamasa Yamaguchi, Tokyo, JP;
Takuya Suzuki, Tokyo, JP;
TOKUYAMA DENTAL CORPORATION, , JP;
Abstract
A method of producing a polyurethane-based composite material includes a step of performing a polyaddition reaction in a first composition containing a radically polymerizable monomer (B) free from causing a polyaddition reaction with any of a radically polymerizable diol compound (a1) and a diisocyanate compound (a2), to thereby form a polyurethane component (A) having a number average molecular weight of from 1,500 to 5,000, a step of preparing a second composition containing the component A, the component B, a radical polymerization initiator, and a filler, and a step of performing radical polymerization using the second composition. A ratio R represented by the following Equation 1 is from 20 mass % to 80 mass %. Equation 1 is R=100×B/[a1+a2+A+B], where a1, a2, A, and B represent the contents (parts by mass) of the components a1, a2, A, and B in the second composition.