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Low-temperature-resistant frozen polycarbonate abrasive, raw materials and method for preparation thereof, and method for removing burrs

A polycarbonate and low-temperature-resistant technology, which is applied in the field of low-temperature-resistant freezing polycarbonate abrasives and their preparation raw materials and preparation, can solve the problems of low-temperature draping treatment effect and poor wear resistance, and achieve good draping effect and good dispersion , Improve the effect of low temperature impact toughness

Inactive Publication Date: 2019-10-18
JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low-temperature edging treatment effect and poor wear resistance of existing polycarbonate abrasives, and to provide a kind of polycarbonate abrasive that can still effectively handle edging at low temperatures and has good wear resistance. Low-temperature freeze-resistant polycarbonate abrasive, raw material and preparation method thereof, and method for treating burr

Method used

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Embodiment approach

[0021] In the present invention, the polycarbonate, silicone-polycarbonate copolymer and toughening agent are essential components, while compatibilizers and other auxiliary agents are optional components. Wherein, the weight ratio of the polycarbonate, the silicone-polycarbonate copolymer and the toughening agent is (7.5-50):(0.5-15):1. Based on the total weight of the preparation raw materials of the low-temperature-resistant polycarbonate abrasive, the content of the compatibilizer can be 0-5wt%, preferably 0.1-1wt%; the content of the other auxiliary agents can be 0 ~5 wt%, preferably 0.1-1 wt%. According to a preferred embodiment of the present invention, the raw material for the preparation of the low temperature resistant polycarbonate abrasive consists of the following components: polycarbonate 60-90wt%, organosilicon-polycarbonate copolymer 5-30wt%, 2-8 wt% of the toughening agent, 0.1-1 wt% of the compatibilizer and 0.1-1 wt% of other auxiliary agents.

[0022] In ...

Embodiment 1

[0032] Aromatic polycarbonate (viscosity-average molecular weight 17000, melt index 3g / 10min at 300°C and 1.2kg), silicone-polycarbonate copolymer (purchased from Samyang Chemical Co., Ltd., brand ST6- 3022PJ, the weight-average molecular weight is 25000, and the effective silicon content is 6wt%), toughening agent (purchased from Mitsubishi Rayon Company, the brand is S-2030, has a core-shell structure, and the shell is methyl methacrylate with a number-average molecular weight of 25000 ester-styrene copolymer, the core is silicone rubber with a glass transition temperature Tg of -75°C), a compatibilizer (purchased from Arkema, the brand is AX8900) and other additives (phosphorus antioxidant AO- 168) placed in a mixer to stir and mix evenly, and then put the obtained mixture into a twin-screw extruder with a length-to-diameter ratio of 40:1 for melting and mixing, and then melt, extrude, draw, and pelletize through a die to obtain Low-temperature freeze-resistant polycarbonat...

Embodiment 2

[0034] Aromatic polycarbonate (viscosity average molecular weight: 28000, melt index at 300°C, 1.2kg: 3g / 10min), organosilicon-polycarbonate copolymer (purchased from Samyang Chemical Company, brand name: ST6- 3022PJ, the weight-average molecular weight is 25000, and the effective silicon content is 6wt%), toughening agent (purchased from Mitsubishi Rayon Company, the brand is S-2030, has a core-shell structure, and the shell is methyl methacrylate with a number-average molecular weight of 25000 ester-styrene copolymer, the core is silicone rubber with a glass transition temperature Tg of -75°C), a compatibilizer (purchased from Arkema, the brand is AX8900) and other additives (phosphorus antioxidant AO- 168) placed in a mixer to stir and mix evenly, and then put the obtained mixture into a twin-screw extruder with a length-to-diameter ratio of 40:1 for melting and mixing, and then melt, extrude, draw, and pelletize through a die to obtain Low-temperature freeze-resistant poly...

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Abstract

The invention belongs to the field of composites, and discloses a low-temperature-resistant frozen polycarbonate abrasive, raw materials and method for preparation thereof, and a method for removing burrs. The raw materials for preparation of the low-temperature-resistant frozen polycarbonate abrasive comprise polycarbonate, a silicone-polycarbonate copolymer, a flexibilizer, and an optional compatilizer and other additives, wherein a weight ratio of the polycarbonate to the silicone-polycarbonate copolymer and the flexibilizer is (7.5-50):(0.5-15):1; the flexibilizer has a core-shell structure in which the shell is an acrylate polymer having a number-average molecular weight of 18000-28000 and the core is silicone rubber having a glass-transition temperature Tg below -60 DEG C. The polycarbonate abrasive prepared from the raw materials disclosed in the present invention is good in burr removal effect at low temperature and small in abrasion loss.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a low-temperature freeze-resistant polycarbonate abrasive, its preparation raw material and preparation method, and a method for treating burr. Background technique [0002] During the injection and injection molding process of the parts, many parts will have some fronts at the corners. Handling these hoods manually alone will not only have low timeliness, but also the appearance of the processed parts cannot be guaranteed, which may affect the appearance of the parts. However, the use of conventional abrasives to process these fronts can meet the needs of general fronts, but for some more precise and demanding parts or for some parts with relatively high hardness and rigidity, the treatment effect is relatively poor. . [0003] Polycarbonate (PC) has the characteristics of good impact resistance and high hardness, so it is widely used as an abrasive to treat the ...

Claims

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Application Information

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IPC IPC(8): C09K3/14C08L69/00C08L33/12C08L83/04B24B1/00
CPCC09K3/1436C08L69/00B24B1/00C08L2205/025C08L2205/035C08L2207/53C08L33/12C08L83/04
Inventor 林明佳曾建广薛成亮申应军
Owner JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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