High heat resistance modified synthetic resin material

Abstract

Disclosed is a high heat resistance modified synthetic resin, whose main components comprise ABS resin, poly alpha-methyl styrene and poly N-phenyl-maleimide. Wherein, the ABS resin is 40 parts by weight, the poly alpha-methyl styrene is 45 parts by weight and the poly N-phenyl-maleimide is 15 parts by weight. A novel twin-screw intermeshing co-rotating extruder and a two-stage vacuum device are adopted to mix the materials for preparing the high heat resistance modified synthetic resin. Because the high heat resistance modified synthetic resin mixed and prepared on the basis of the poly alpha-methyl styrene and the poly N-phenyl-maleimide being added simultaneously into the ABS resin, thermal deformation temperature of the material is improved under the precondition of the indexes such as impact intensity, tensile intensity and bending intensity of the ABS are guaranteed.

Description

technical field [0001] The invention relates to a synthetic resin material, in particular to a highly heat-resistant modified synthetic resin material. Background technique [0002] ABS resin is a kind of blend, which is acrylonitrile-butadiene-styrene copolymer, and the general ratio of these three is 20:30:50 (melting point is 175°C). As long as the ratio of the three, the polymerization method, and the size of the particles are changed, a series of varieties with different impact strengths and flow characteristics can be produced. Because ABS resin has good blending and molding processability, and low price, it is widely used. The general ratio of the three components in ABS resin is 20:30:50. Increasing the butadiene component will increase its impact strength, but its hardness and fluidity will decrease, and its strength and heat resistance will also deteriorate. ; As the content of styrene increases, its tensile strength, rigidity, transparency, and processing fluidi...

AI Technical Summary

Problems solved by technology

There are many developments for super heat-resistant ABS. Many manufacturers and research institutes generally only introduce poly-α-methylstyrene (α-MS) to improve the heat resistance of ABS. The methyl group in α-MS improves the molecular chain The rigidity of the segment, thereby increasing the rigidity and heat resistance of the copolymer, but the toughness decreases, therefore, with the increase of α-MS, the impact strength of the copolymer decreases, although it can be improved by adding α-MS during polymerization ABS resin heat resistance, but generally speaking, the improvement of ABS resin heat resistance is not very large; some manufacturers introduce poly N-phenylmaleimide (PMI) heat resistance modifier alone to improve ABS resin Heat resistance, it is added in a certain proportion to ABS resin, and can produce super heat-resistant ABS resin with other properties remaining unchanged, thereby expanding the application range of ABS, although PMI heat-resistant modifier can greatly improve the resistance of ABS resin Thermal, but its cost is relatively high, and the ΔT between ABS and PMI g It is much higher than that of α-MS, and it is difficult to mix

The general equipment for ABS mixing is twin-screw extruder, single-screw extruder and internal mixer, etc. These existing equipment are not effective in mixing PMI