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Method for reducing internal stress of polycarbonate and modified product thereof

A polycarbonate, internal stress technology, applied in the field of reducing the internal stress and internal stress treatment of polycarbonate and its modified products, can solve problems such as product size changes

Active Publication Date: 2020-03-17
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the current annealing process can reduce the internal stress of polycarbonate and its modified products, heat treatment of the workpiece will cause the disadvantage of changing the size of the product, which cannot meet the application requirements in the field of high product size requirements

Method used

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  • Method for reducing internal stress of polycarbonate and modified product thereof
  • Method for reducing internal stress of polycarbonate and modified product thereof
  • Method for reducing internal stress of polycarbonate and modified product thereof

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Embodiment Construction

[0024] The present invention will be further described through specific examples below, and the described examples of the present invention are only used as illustrations of the present invention, and do not limit the scope of the present invention.

[0025] The raw materials and sources of the product are as follows:

[0026] A1105, pure polycarbonate product, melt flow index is 10g / 10min (test condition is 300℃, 1.2kg), Wanhua Chemical Group Co., Ltd.;

[0027] CA1560, polycarbonate / ABS product, Wanhua Chemical Group Co., Ltd.;

[0028] CB1221, polycarbonate / PBT products, Wanhua Chemical Group Co., Ltd.;

[0029] CE1631, polycarbonate / PET products, Wanhua Chemical Group Co., Ltd.;

[0030] CS1530, polycarbonate / ASA product, Wanhua Chemical Group Co., Ltd.;

[0031] CR1840, polycarbonate toughened product, Wanhua Chemical Group Co., Ltd.

[0032] The above-mentioned polycarbonate and its modified products are prepared by injection molding stretching splines and square pla...

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Abstract

The invention provides a method for reducing internal stress of polycarbonate and a modified product thereof, wherein the method comprises the following steps: soaking polycarbonate or the modified product thereof in an alcoholic solution for 0.1-2 h at the temperature of 0-50 DEG C. Researches find that a low-concentration small molecular alcoholic solution can promote molecular chain rearrangement of stress concentration points of polycarbonate and the modified product thereof, and thus, the internal stress of polycarbonate and the modified product thereof is reduced, the internal stress ofthe product is improved under the condition that the dimensional stability of the product is not influenced, and the phenomena of warping deformation, crazing, poor impact resistance and the like of the product caused by large internal stress are prevented.

Description

technical field [0001] The invention relates to a method for treating internal stress, in particular to a method for reducing the internal stress of polycarbonate and its modified products, and belongs to the technical field of polycarbonate materials. Background technique [0002] Polycarbonate and its modified products refer to the composition with polycarbonate as the main component, which is a very common material in daily life. Due to its good mechanical properties, heat resistance, apparent properties, and excellent processing properties, polycarbonate and its modified products are widely used in the fields of automobiles, electronic and electrical equipment, lighting, medical equipment, and national defense industries. [0003] However, due to the high rigidity of the polycarbonate molecular chain, the parts of polycarbonate and its modified products tend to have relatively large internal stress. These internal stresses will cause warping and deformation, silver stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02C08L69/00C08L55/02C08L67/02C08L51/04
CPCC08J7/02C08J2369/00C08J2455/02C08J2467/02C08J2451/04
Inventor 陈晶斌张振威李万庆高卫强
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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