Multiple Preparation Methods of Epoxy Matrix Resin
Nov 22, 2023
Specific implementation method 4: The difference between this implementation method and specific implementation methods 1, 2, or 3 is that the epoxy value of the phenolic epoxy resin is 0.42~0.54, and the epoxy value of the bisphenol A epoxy resin is 0.41~0.56. The other parameters are the same as those of specific embodiments 1, 2, or 3.
Specific implementation method 5: The difference between this implementation method and specific implementation methods 1 to 4 is that the curing accelerator is N, N '- dimethyldiphenylurea, N, N' - diethyldiphenylurea, N-para chlorophenyl N, N '- dimethylurea, 3-phenyl-1,1-dimethylurea, 3-phenyl-1,1-dimethylurea (chlorourea) or thiourea. The other parameters are the same as the specific implementation method 1, all four.
Specific implementation method 6: This implementation method is the preparation method of the epoxy matrix resin described in specific implementation method
1. The preparation method of the epoxy matrix resin is achieved through the following steps: 1. Weigh 40 parts of phenolic epoxy resin, 60 parts of bisphenol A epoxy resin, 2-10 parts of core-shell polymer, 15-24 parts of curing agent, and 3.0-6.0 parts of curing accelerator by mass, The curing agent is a combination curing agent of dicyandiamide and 4,4 '- diaminodiphenylsulfone,Among them, the mass fractions of 4,4 '- diaminodiphenylsulfone and dicyandiamide are 18 and 6, 14 and 7, 10 and 8, or 6 and 9, respectively. The curing accelerator is an organic urea or its derivative;
2、Mix 40 portions of phenolic epoxy resin, 60 portions of bisphenol A epoxy resin, and 2-10 portions of core-shell polymer weighed in step 1 into a container, and then heat them to 150 ° C under stirring conditions. Then, add the 4,4 '- diaminodiphenylsulfone curing agent weighed in step 1, continue stirring and heating to 150 ° C, hold for 3-5 minutes, and cool to room temperature to obtain B-order resin;
3、Take 30 portions of the B-order resin obtained in step 2 and place them in a three-roller grinder. Then, add the dicyandiamide curing agent weighed in step 1 and the 3.0-6.0 portions of the curing accelerator weighed in step 1. Grind the resin in a three-roller grinder for 3-6 times, and then add the remaining B-order resin prepared in step 2. Continue grinding the resin in a three-roller grinder for 3-6 times to obtain the epoxy matrix resin; The temperature of the three roller grinding machine mentioned in step three is maintained at 60-70 ° C.
The preparation method of this embodiment is simple and easy to operate. The core-shell polymer described in step 1 can be commercially available or prepared using existing publicly available preparation methods. The number of parts in the B-order resin obtained from step 2 of the 30 parts described in step 3 of this embodiment is the same as the benchmark used for weighing in step 1.
Using the performance testing method and parameters recorded in the specific implementation method 1, the cured epoxy matrix resin prepared in this implementation method (curing condition: curing at 120 ° C for 2-3 hours) was tested. The glass transition temperature was measured to be 133~138 ° C, the impact strength was 10-22KJ/m, the tensile strength was 65~85MPa, the tensile modulus was 3.0~3.6GPa, the elongation at break was 2.6~4.6%, and the bending strength was 100~140MPa, The bending modulus is 2.6~3.6GPa. The epoxy matrix resin of this embodiment has good performance.
Our main products are epoxy resin fibreglass resin, Epoxy Matrix, Epoxy Composites, epoxy resin cross-linked with IDA, alkali resistant epoxy resin,Epoxy Matrix Resin.
