Glass fiber reinforced plastics based on 2,3-butanediol, and preparation method thereof
A technology based on butanediol and glass fiber reinforced plastics, applied in the field based on 2, to achieve the effects of good rigidity and heat resistance, high hardness, and good market prospects
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Embodiment 1
[0049] Mix 98g of maleic anhydride, 200g of 2,3-butanediol, and 0.06g of tetra-n-butyl titanate. Add it to a 250mL three-necked flask equipped with a mechanical stirring device. After all the materials are added, equip the flask with a set of condensation device, vacuumize and fill with nitrogen three times, remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen, and heat until the reaction mixture is completely melted / dissolved into a homogeneous phase After the system, the esterification reaction was stirred at 200° C. for 5 h, and in the process, water was steamed out from the reaction mixture as a by-product until the amount of water reached 92% of the theoretical calculation amount (the theoretical calculation molar weight of water was equal to that of maleic diethylene glycol) molar amount of anhydride).
[0050] 0.05 g of zinc acetate was added to the reaction mixture as a polycondensation catalyst. The polyme...
Embodiment 2
[0055] Add 49g of maleic anhydride, 73g of adipic acid, 150g of 2,3-butanediol, 100g of 1,4-butanediol, and 0.93g of magnesium acetate into a 250mL three-necked flask equipped with a mechanical stirring device. After all the materials are added, equip the flask with a set of condensation device, vacuumize and fill with nitrogen three times, remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen, and heat until the reaction mixture is completely melted / dissolved into a homogeneous phase After the system, the esterification reaction was stirred at 210° C. for 4 h. In the process, water was steamed out from the reaction mixture as a by-product until the amount of water reached 92% of the theoretical calculation amount (the theoretical calculation molar weight of water was equal to 1 times of cis-butyl the sum of the molar weight of olefinic anhydride and twice the molar weight of adipic acid).
[0056] 0.93 g of antimony ...
Embodiment 3
[0061] 30g maleic anhydride, 59g phthalic anhydride, 52g dimethyl adipate, 150g 2,3-butanediol, 50g ethylene glycol, 0.02g tetraisooctyl titanate, 0.03g Antimony acetate was added to a 250mL three-necked flask equipped with a mechanical stirring device. After all the materials are added, equip the flask with a set of condensing devices, vacuumize and fill with nitrogen three times, remove the oxygen in the reaction vessel to ensure that the transesterification and esterification reactions are carried out under nitrogen, and heat until the reaction mixture is completely melted / dissolved After becoming a homogeneous system, the transesterification and esterification reactions were stirred at 180° C. for 8 h. During this process, water and methanol were distilled out from the reaction mixture as by-products until the amount of the distillate reached 92% of the theoretically calculated amount (water The theoretically calculated molar weight is equal to the sum of the molar weight ...
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