Noise-reducing and high-strength pc/abs alloy and preparation method thereof

Abstract

The invention relates to the field of high polymer materials, in particular to a noise reduction and high-strength PC (polycarbonate) / ABS (acrylonitrile butadiene styrene) alloy which comprises, by weight, 40-80 parts of PC resin, 20-50 parts of ABS resin, 2-10 parts of noise reduction composite materials, 0.1-1 part of lubricants and 0.1-1 part of antioxidants. The invention further provides a preparation method of the noise reduction and high-strength PC / ABS alloy. Excellent noise reduction performance is kept under the use condition of the temperature ranging from -20 DEG C to 40 DEG C, noise generated in mutual friction of PC / ABS plastic components is reduced, and the total quality of an automobile is improved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PC / ABS alloy with noise-reduction and high-strength performance and a preparation method thereof, which exhibit good noise-reduction performance at operating temperatures of -20°C to 40°C. Background technique [0002] Polycarbonate (PC) is a linear polycarbonate, an amorphous engineering plastic with good toughness, transparency and heat resistance. ABS has good fluidity and impact performance. Therefore, the blending of PC and ABS can combine the excellent properties of both PC and ABS, which can not only improve the heat resistance and tensile strength of ABS, but also reduce the melt viscosity of PC and improve the processing performance. However, when PC / ABS materials are used as automotive interior materials, they often produce "squeaking" noises due to mutual contact or friction, especially at low temperatures in winter, this noise is more obvious, which greatly affects...

AI Technical Summary

Problems solved by technology

The ambient temperature of automotive interior parts is normally used at -20°C to 40°C. It is difficult for these conventional solutions to maintain good noise reduction performance and high strength under such wide temperature conditions.

[0003] Chinese patent document CN107325514A (application number 201710517972.1) discloses a noise-reducing PC / ABS alloy and its preparation method. By adding polyurethane elastomer, its loss factor is improved and its damping performance is improved, but its glass transition temperature (T g ) is -60°C, and under the temperature conditions of 0-40°C, it does not show excellent damping performance

[0004] Chinese patent document CN107353617A (application number 201710517060.4) discloses a PC / ABS alloy with noise reduction performance and its preparation method. The effect of noise reduction can be improved by adding OMMT blends, but organic montmorillonite can only be obtained through its Lamellar structure to hinder the movement of molecular chains to achieve the effect of noise reduction

However, if it is added in a small amount, it will not achieve a good effect; in addition, the interlamellar spacing of OMMT is only 2-4nm, and it is difficult to intercalate PC / ABS into the interlayers of OMMT by the melt blending method to achieve the desired effect. noise reduction effect

If the amount added is too high, it will have a great impact on the impact performance of PC / ABS, so there are great disadvantages

[0005] The noise reduction performance of the material has a great relationship with the ambient temperature used. The present invention relates to a PC / ABS alloy and its Its preparation method has not yet been reported

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