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High-rigidity high-fluidity polystyrene composition and preparation method and application thereof

A high-impact polystyrene and high-fluidity technology, applied in the field of high-rigidity and high-fluidity polystyrene compositions and their preparation, can solve the problems of insufficient rigidity or product dimensional accuracy, large Young's modulus, high rigidity, etc. , to achieve good bass effect, improve material density and excellent performance

Active Publication Date: 2015-04-08
CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (2) Large Young's modulus and high rigidity;
However, the above existing research still has defects such as insufficient rigidity or insufficient dimensional accuracy of the product.

Method used

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  • High-rigidity high-fluidity polystyrene composition and preparation method and application thereof
  • High-rigidity high-fluidity polystyrene composition and preparation method and application thereof
  • High-rigidity high-fluidity polystyrene composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Preparation of high-rigidity and high-fluidity polystyrene composition

[0038] 71wt% high-impact polystyrene (HIPS, 200°C, 5Kg melt index is 4g / min, rubber particle size is 0.5μm), 15wt% transparent polystyrene, 10wt% mineral fillers (calcium carbonate and talc, The particle size is 0.5~1μm) and 4wt% additives (styrene-butadiene rubber toughening agent, molecular weight is 1.0×10 5 , The ratio of styrene to butadiene is: 40 / 60) Put it into a high-speed mixer with a rotation speed of about 1000rpm and mix for 3min, then put it into a twin-screw extruder, the temperature is controlled at: 230℃, the screw speed is 450rpm, Extrusion and granulation can obtain a polystyrene composition with high rigidity and high fluidity.

Embodiment 2

[0039] Example 2: Preparation of high-rigidity and high-fluidity polystyrene composition

[0040] Combine 65wt% high-impact polystyrene (HIPS, 200℃, 5Kg melt index is 3-6g / min, rubber particle size is 1μm), 25wt% transparent polystyrene, 5wt% mineral filler (talc powder, particle size 0.5~1μm) and 5wt% additives (styrene-butadiene rubber toughening agent, molecular weight 2.0×10 5 , The ratio of styrene to butadiene is: 30 / 70) Put it into a high-speed mixer with a rotation speed of about 1000rpm and mix for 3min, then put it into a twin-screw extruder, the temperature is controlled at: 230℃, the screw speed is 450rpm, Extrusion and granulation can obtain a polystyrene composition with high rigidity and high fluidity.

Embodiment 3

[0041] Example 3: Preparation of high rigidity and high fluidity polystyrene composition

[0042] 70wt% high-impact polystyrene (HIPS, 200℃, 5Kg melt index is 6g / min, rubber particle size is 3μm), 12wt% transparent polystyrene, 10wt% mineral filler (talc powder, particle size 0.5 ~1μm) and 8wt% additives (styrene-butadiene rubber toughening agent, molecular weight 2.0×10 5 , The ratio of styrene to butadiene is: 40 / 60) Put it into a high-speed mixer with a rotation speed of about 1000rpm, mix for 3min, and then put it into a twin-screw extruder, the temperature is controlled at 230℃, the screw speed is 450rpm, Extrusion granulation can obtain high rigidity and high fluidity polystyrene composition.

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Abstract

The invention belongs to the technical field of polystyrene materials and discloses a high-rigidity high-fluidity polystyrene composition and a preparation method and application thereof. The polystyrene composition comprises the following components in percentage by mass: 65-80 percent of high impact polystyrene, 15-25 percent of transparent polystyrene, 5-10 percent of a mineral filler and 0-8 percent of aids, wherein the fusion index (200 DEG C, 5Kg) of the high impact polystyrene is 3-6g / min; and the particle size of rubber is 0.5-3 microns. In the composition, the high impact polystyrene of special rubber particle size and a flexibilizer of proper molecular weight and rubber size and distribution are preferentially selected, the composition has high rigidity and high fluidity, and a loudspeaker box of a complex structure can be directly formed. Moreover, due to the addition of the mineral filler, the material density is improved, the dimensional stability and sound insulation effect of the product are improved, the mechanical property is maintained, the composition can be widely applied to the field of audio-visual equipment and is particularly applied to the manufacture of loudspeaker boxes, and an excellent low-pitch tone quality can be obtained.

Description

Technical field [0001] The invention belongs to the technical field of polystyrene materials, and particularly relates to a high-rigidity and high-fluidity polystyrene composition and a preparation method and application thereof. Background technique [0002] Someone once compared the speaker as the mouthpiece of audio equipment, the crossover is the heart and lung, and the cabinet is the skeleton, which is the structure that supports the entire speaker system. It can be seen that the cabinet has a great effect on the quality of the speaker. The material of the box body and the shape and size of the box body affect the sound quality of the box body. Among them, the processing performance of the box material directly affects the shape of the box, so the material of the box material is the most important factor, and the selection of materials is very important for the production of the box. [0003] The materials used to make the speaker box include wood materials, inorganic materi...

Claims

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Application Information

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IPC IPC(8): C08L51/04C08L25/06C08K13/02C08K3/34C08K3/26C08K3/30
Inventor 杨燕程庆王林陈日平林士文胡志华
Owner CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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