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Friction noise resistant polycarbonate composition and preparation method thereof

A technology of polycarbonate and composition, which is applied in the field of anti-friction noise polycarbonate composition and its preparation, can solve the problems of noise reduction, inability to reduce friction coefficient, etc., and achieves reduction of brittleness and extension of blending compatibility. time, the effect of improving the anti-friction noise ability

Active Publication Date: 2017-06-16
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite material mainly improves the capacitance performance, and cannot reduce the friction coefficient and noise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh each component by weight: PC: 74, PS-b-PAA 2: 25, hindered phenol: 1, lubricant PETS 0.3.

[0034] (2) Put the raw materials into a mixing mixer for mixing; melt and extrude at 250-300° C., and granulate to obtain the product.

[0035] (3) The screw diameter of the extruder is 58 mm, and the aspect ratio is 60.

Embodiment 2

[0037] (1) Weigh each component by weight: PC: 50, PS-b-PAA 2: 40, hindered phenol: 5, lubricant PETS 0.5.

[0038] (2) Put the raw materials into a mixing mixer for mixing; melt and extrude at 250-300° C., and granulate to obtain the product.

[0039] (3) The screw diameter of the extruder is 58 mm, and the aspect ratio is 60.

Embodiment 3

[0041] (1) Weigh each component by weight: PC: 60, PS-b-PAA 2: 37, hindered phenol: 3, lubricant PETS 0.3.

[0042] (2) Put the raw materials into a mixing mixer for mixing; melt and extrude at 250-300° C., and granulate to obtain the product.

[0043] (3) The screw diameter of the extruder is 58 mm, and the aspect ratio is 60.

[0044] After each comparative example and embodiment are injection-molded, two types of samples are made in size. Test piece 1 is a flat plate of 200mm×150mm×2mm, and test piece 2 is a flat plate with protruding ribs on a flat plate of 200mm×150mm×2mm. Perform reciprocating motion at the same time as 800g or 1500g, and check whether there is a squeaking sound at this time.

[0045] OO: There is no squeaking under any condition of load 800g and 1500g

[0046] O: There is no squeak when the load is 800g, and there is a slight squeak when the load is 1500g

[0047] ●: There is a small squeaking sound when the load is 800g and 1500g

[0048] ╳: There ...

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Abstract

The invention relates to a friction noise resistant polycarbonate composition and a preparation method thereof. The composition comprises, by weight, 50-75 parts of polycarbonate resin, 25-40 parts of a polystyrene-polyacrylic acid block copolymer, 1-5 parts of hindered phenol and 0.1-1 part of a lubricant. The preparation method comprises the following steps: adding above raw materials to a mixing stirrer, mixing the raw materials, and carrying out blend granulation on the mixed raw materials through a double screw extruder to prepare the friction noise resistant polycarbonate composition. A large amount of hydrogen bonds formed by the polystyrene-polyacrylic acid block copolymer (PS-b-PAA) and the hindered phenol guarantee the physical properties of materials, reduce the brittleness and improve the friction noise resistance of the materials; and the extruder with a large length / diameter ratio prolongs the blend compatibility time, very good compatibility is obtained through ester exchange of the PC and the PS-b-PAA, and the time of the generation of the hydrogen bonds by the PAA and the hindered phenol is long, so the friction noise resistant polycarbonate composition is obtained.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polycarbonate composition for resisting frictional noise and a preparation method thereof. Background technique [0002] Polycarbonate resin has excellent impact resistance, heat resistance and transparency, wide temperature range, high dimensional stability, good creep resistance, widely used in automobiles, electronic appliances, glass lenses and medical devices and other fields . In more and more cases, higher requirements are put forward for the performance of materials, one of which is to improve the friction characteristics of sliding components and mechanical components in automobiles or electronic and electrical products, and reduce the friction noise caused by sliding, etc. . [0003] In the prior art, liquid or semi-solid lubricants, such as grease, are generally added during assembly. As a result, polycarbonate is prone to stress cracking due to grease corrosion. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L53/00C08K5/134C08K5/103
CPCC08L69/00C08L53/00C08K5/1345C08K5/103
Inventor 柏莲桂李强罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS