	US 12,359,024 B2
	Biomass benzoxazine-based shape memory resin, preparation method therefor, and application thereof
Aijuan Gu, Suzhou (CN); Guozheng Liang, Suzhou (CN); and Li Yuan, Suzhou (CN)
Assigned to SOOCHOW UNIVERSITY, Suzhou (CN)
Appl. No. 17/927,085
Filed by SOOCHOW UNIVERSITY, Suzhou (CN)
PCT Filed Sep. 29, 2020, PCT No. PCT/CN2020/119094 § 371(c)(1), (2) Date Nov. 22, 2022, PCT Pub. No. WO2021/238004, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010444854.4 (CN), filed on May 23, 2020.
Prior Publication US 2023/0242707 A1, Aug. 3, 2023
Int. Cl. C08G 73/02 (2006.01); C07D 265/14 (2006.01)

CPC C08G 73/0233 (2013.01) [C07D 265/14 (2013.01); C08G 2280/00 (2013.01)]

10 Claims

1. A method of preparing a shape memory bio-based benzoxazine resin, comprising the following steps:

(1) heating and reacting furfurylamine, a formaldehyde compound and vanillin, recrystallizing to obtain a bio-based benzoxazine monomer containing aldehyde group;

(2) conducting a coupling reaction of bio-based benzoxazine monomer containing aldehyde group and polyetheramine to obtain a Schiff base benzoxazine monomer; and

(3) curing the Schiff base benzoxazine monomer to obtain the shape memory bio-based benzoxazine resin.