09-05-2023 дата публикации
Номер: CN116082835A
Автор:
CAI YAOWU,
ZHANG YONG,
MA YUMIN,
LI YAO,
WANG JIANBIN,
LU YUCHONG,
WANG KE,
SUN XIAOKANG,
DU SHUAIPENG,
GUO ZHENG,
TAO XINLIANG,
ZENG RONGPING,
CAI JIANWU
Принадлежит:
The invention provides low-density nylon and a preparation method thereof. The preparation method comprises the following steps: a) dissolving hydroxy acid small molecules in a solvent, removing water, cooling, adding trifunctional isocyanate, reacting for 1-2 hours, adding a catalyst under the protection of inert gas and stirring, and continuously reacting for 3-5 hours to obtain a reinforcing aid; and b) uniformly mixing PA66, talcum powder, glass beads, the reinforcing aid obtained in the step a) and a silane coupling agent, and extruding by using a double-screw extruder at 275-295 DEG C under the condition of vacuumizing to-0.08 MPa to-0.05 MPa to obtain the low-density nylon. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw materials are selected, particularly, a specific reinforcing aid is introduced, and specific preparation processes, conditions and parameters are matched, so that relatively good overall interaction ...
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