CN112251008A - Chemical-resistant and bending-resistant polycarbonate composite material and preparation and application thereof - Google Patents
Chemical-resistant and bending-resistant polycarbonate composite material and preparation and application thereof Download PDFInfo
- Publication number
- CN112251008A CN112251008A CN202011037518.4A CN202011037518A CN112251008A CN 112251008 A CN112251008 A CN 112251008A CN 202011037518 A CN202011037518 A CN 202011037518A CN 112251008 A CN112251008 A CN 112251008A
- Authority
- CN
- China
- Prior art keywords
- resistant
- chemical
- bending
- polycarbonate composite
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
- H04M1/185—Improving the rigidity of the casing or resistance to shocks
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/53—Core-shell polymer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention belongs to the field of composite materials, and discloses a chemical-resistant and bending-resistant polycarbonate composite material for injection molding and preparation and application thereof. The composite material comprises the following components in percentage by weight: 85% -98% of polycarbonate resin; 0.5 to 5 percent of glass powder; 3% -7% of core-shell structure toughening agent; 0.05 to 0.5 percent of antioxidant; 0.1 to 2.0 percent of release agent. According to the invention, by adding the glass powder and the core-shell structure toughening agent, the chemical resistance of the welding line part of the workpiece can be greatly improved, the bending resistance of the product after a spraying process is greatly improved, cracking is reduced, and the yield is improved.
Description
Technical Field
The invention belongs to the field of composite materials, and particularly relates to a chemical-resistant and bending-resistant polycarbonate composite material, and preparation and application thereof.
Background
Polycarbonate (PC) is widely used as a mobile phone rear shell material due to good impact resistance, and has the advantages of portability, drop resistance, good dielectric property and the like. With the popularization of large screens, the difference of the front of the mobile phone is smaller and smaller, and in order to meet the requirements of individuation and differentiation, mobile phone manufacturers can only make articles on the rear shell, so that various appearance effects are realized. In order to achieve various appearance effects, PC is often required to be painted and surface treated. Due to poor resistance of PC, various chemical agents used in spraying and surface treatment have a significant effect on PC, resulting in a decrease in toughness of PC, direct cracking, or bending cracking. Such cracking tends to occur near the weld line, mainly for two reasons, one being that the weld line itself is weaker than elsewhere and has poor toughness. And secondly, the part near the welding line is always provided with stronger residual stress and is more easily attacked by chemical reagents. Particularly, as the weight of the 5G mobile phone increases and the appearance is extremely desired, a stronger chemical agent is required for surface treatment. The PC material suitable for use in the past has high reject ratio under the new requirements of toughness and bending, and the requirements are difficult to meet.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention mainly aims to provide the chemical-resistant and bending-resistant polycarbonate composite material, which can greatly improve the chemical resistance of a welding line part of a workpiece, greatly improve the bending resistance of the product after a spraying process, reduce cracking and improve the yield by adding glass powder and a toughening agent with a core-shell structure with a certain size.
The invention also aims to provide a preparation method of the chemical-resistant and bending-resistant polycarbonate composite material.
The invention further aims to provide application of the chemical-resistant and bending-resistant polycarbonate composite material.
The purpose of the invention is realized by the following scheme:
a chemical-resistant and bending-resistant polycarbonate composite material comprises the following components in percentage by weight:
85% -98% of polycarbonate resin;
0.5 to 5 percent of glass powder;
core-shell structure toughener 0.5% -10%;
0.05 to 0.5 percent of antioxidant;
0.1 to 2.0 percent of release agent;
the weight percentage of the polycarbonate resin is preferably 88-95%;
the glass powder is preferably surface modified glass powder, wherein the surface modified compound is polyolefin, and is preferably Chongqing International 415A-14C; the D50 of the glass powder is less than 5 um; preferably less than 2 um;
the weight percentage of the glass powder is preferably 1-3%, and more preferably 2%;
d50 of the core-shell structure toughening agent is more than 300 nm;
the content of the rubber phase in the core-shell structure toughening agent is more than 70 percent.
The weight percentage of the core-shell structure toughening agent is preferably 3-7%.
The core-shell structure toughening agent preferably takes polydimethylsiloxane as a core and polymethyl methacrylate as a shell; more preferably mitsubishi chemical S2100.
The antioxidant is hindered phenol antioxidant or phosphite antioxidant, and the release agent is stearate.
The preparation method of the chemical-resistant and bending-resistant polycarbonate composite material comprises the following steps: the components are mixed according to the proportion and then extruded and granulated by an extruder to obtain the bending-resistant polycarbonate composite material for injection molding, wherein the granulation temperature is 230-300 ℃.
The chemical-resistant and bending-resistant polycarbonate composite material is applied to the preparation of the rear shell of the mobile phone.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the chemical-resistant and bending-resistant polycarbonate composite material disclosed by the invention can greatly improve the chemical resistance of the welding line part of a workpiece, greatly improve the bending resistance of the product after a spraying process, reduce cracking and improve the yield. The preparation method is simple and feasible, and is suitable for large-scale production and application.
Drawings
FIG. 1 is an illustration of the bend cracking of the reference 1 article after the spray coating process of example 1.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially. PC is TARFLON IR1900, glass powder is ground by Chongqing International 415A-14C, and D50 is 1.2 μm. Core-shell toughener 1 is Mitsubishi chemical S2001, core-shell toughener 2 is Mitsubishi chemical S2100, core-shell toughener 3 is Dow chemical EXL2691J, and core-shell toughener 4 is Jinhuilai HR 181.
Example 1
The components in table 1 were mixed in a mixer in the weight ratios shown in table 1, and then pelletized with a twin-screw extruder at a temperature of 240 ℃ to 280 ℃. The obtained particles are injected on a real mobile phone mold, a sample after injection molding is divided into two parts, and one part is directly subjected to bending test (the test mode is that a workpiece is bent in the same direction by taking the central line of the long edge as a symmetry axis, and the bending angle when fracture occurs is recorded). The other part was subjected to spray test. The spraying test is that the Taiwan blue brand HD-130 spray gun is used for spraying the Tiantong water on one side of the workpiece at the speed of 2.5cm/s and the distance between the nozzle of the spray gun and the surface of the workpiece is 2 cm. And (3) standing for 24 hours after spraying, observing whether the workpiece cracks, if not, carrying out bending test on the sprayed workpiece, and recording the bending angle when the workpiece cracks. When bending test is carried out, 3 samples are tested for each sample, and an average value is taken. The test results are shown in table 1.
TABLE 1 Experimental data for different core-shell tougheners
The parameters of the core-shell toughener in table 1 are shown in table 2.
TABLE 2 core-shell toughener parameter table
From the data in table 1, it can be seen that even pure PC has very good bending properties when no spraying is performed. However, when the parts are sprayed, pure PC is directly broken at the weld line. After the core-shell toughening agent is added, although the impact strength data of the material is reduced, the bending performance before and after spraying is improved to a certain degree, and the improvement degree is further improved along with the increase of the toughening agent amount. Meanwhile, different toughening agents have different bending resistance, and the toughening agent 2 has the best effect. However, it can also be seen that even with the addition of 7 parts of toughener 2, the post-spray bending resistance was still only 50 degrees, and did not reach the pre-PC-spray bending resistance level (90 degrees). Although the bending resistance can be further improved by continuing to increase the content of the toughening agent, the toughening agent is generally very expensive and economically unacceptable.
Example 2
The components in table 3 were mixed in a mixer in the weight ratios indicated and granulated with a twin-screw extruder at a granulation temperature of 240 ℃ to 280 ℃. The obtained particles are injected on a real mobile phone mold, a sample after injection molding is divided into two parts, one part is directly subjected to bending test (the test mode is that a workpiece is bent in the same direction by taking the central line of the long edge as a symmetry axis, and the bending angle when fracture occurs is recorded), and the bending angle when fracture occurs is recorded. And spraying the other part of the workpiece, standing for 24 hours after spraying, observing whether the workpiece cracks, if not, carrying out a bending test on the sprayed workpiece, and recording the bending angle when the workpiece cracks. When bending test is carried out, 3 samples are tested for each sample, and an average value is taken. The test results are shown in table 3.
TABLE 3 Experimental data for different combinations of core-shell toughening agents with glass powder
It can be seen from the data in table 3 that when the glass powder is used alone, the impact strength, the chemical resistance and the bending resistance of the material are both reduced to a certain extent, and when the core-shell toughening agent and the glass powder are used together, the chemical resistance and the bending resistance of the material are both improved, and particularly when the core-shell toughening agent 2 is used, even if only 3 parts of the toughening agent is used, the bending fracture angle after spraying reaches 100 degrees and far exceeds those of other toughening agents.
Example 3
The components in table 4 were mixed in a mixer in the weight ratios indicated, and then pelletized with a twin-screw extruder at a temperature of 240 ℃ to 280 ℃. The obtained particles are injected on a real mobile phone mold, a sample after injection molding is divided into two parts, one part is directly subjected to bending test (the test mode is that a workpiece is bent in the same direction by taking the central line of the long edge as a symmetry axis, and the bending angle when fracture occurs is recorded), and the bending angle when fracture occurs is recorded. The other part was subjected to spray test. And in the spraying test, spray the Tianpan water on one surface of the workpiece by using a spray gun, standing for 24 hours after spraying, observing whether the workpiece cracks, if not, carrying out bending test on the sprayed workpiece, and recording the bending angle when the workpiece cracks. When bending test is carried out, 3 samples are tested for each sample, and an average value is taken. The test results are shown in table 4.
TABLE 4 Experimental data for the addition of toughener 2 and glass frit
As can be seen from the data in Table 4, when the content of the toughening agent is kept unchanged and the glass powder is added, the bending resistance of the material tends to be increased and then decreased, and the glass powder content is 1% -3%, so that the material has the best bending resistance. When the content of the glass powder is kept unchanged and the toughening agent is added, the bending resistance of the material is continuously improved, and when the content of the toughening agent is more than 3, the fracture angle is greatly improved to be more than 90 degrees, and the content of 3 to 7 parts is preferred in consideration of cost factors.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The chemical-resistant and bending-resistant polycarbonate composite material is characterized by comprising the following components in percentage by weight:
2. the chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the glass powder is surface modified glass powder, wherein the surface modified compound is polyolefin; the D50 of the glass powder is less than 5 um.
3. The chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the D50 of the core-shell structure toughening agent is more than 300 nm.
4. The chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the rubber phase content of the core-shell structure toughening agent is more than 70%.
5. The chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the chemical components of the core-shell structure toughening agent are polymethyl siloxane as a core and methyl methacrylate as a shell.
6. The chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the glass powder is Chongqing International 415A-14C;
the core-shell structure toughening agent is Mitsubishi chemical S2100.
7. The chemical-resistant, bend-resistant polycarbonate composite of claim 1, wherein:
the antioxidant is hindered phenol antioxidant or phosphite antioxidant, and the release agent is stearate.
8. The bend-resistant polycarbonate composite material for injection molding according to claim 1, characterized by comprising the following components in percentage by weight:
9. a preparation method of the chemical-resistant and bending-resistant polycarbonate composite material according to any one of claims 1 to 8, characterized by comprising the following steps: the components are mixed according to the proportion and then extruded and granulated by an extruder to obtain the bending-resistant polycarbonate composite material for injection molding, wherein the granulation temperature is 230-300 ℃.
10. Use of the bend-resistant polycarbonate composite material for injection molding according to any one of claims 1 to 8 in the preparation of a mobile phone rear shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037518.4A CN112251008B (en) | 2020-09-28 | 2020-09-28 | Chemical-resistant anti-bending polycarbonate composite material and preparation and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037518.4A CN112251008B (en) | 2020-09-28 | 2020-09-28 | Chemical-resistant anti-bending polycarbonate composite material and preparation and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112251008A true CN112251008A (en) | 2021-01-22 |
| CN112251008B CN112251008B (en) | 2023-01-10 |
Family
ID=74233096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011037518.4A Active CN112251008B (en) | 2020-09-28 | 2020-09-28 | Chemical-resistant anti-bending polycarbonate composite material and preparation and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112251008B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000007904A (en) * | 1998-06-25 | 2000-01-11 | Mitsubishi Eng Plast Corp | Molded article for oa equipment parts with excellent damping property |
| CN105153662A (en) * | 2015-07-23 | 2015-12-16 | 深圳华力兴新材料股份有限公司 | Glass fiber reinforced polycarbonate composite material and preparation method therefor |
| CN108192312A (en) * | 2018-01-12 | 2018-06-22 | 中山长虹电器有限公司 | The highlighted of metal/pearly-lustre illusion-colour texture with exquisiteness exempts to spray polycarbonate composite material and preparation method thereof |
| CN110358277A (en) * | 2019-06-21 | 2019-10-22 | 东莞市广正模具塑胶有限公司 | A kind of enhancing is flexible to exempt to spray makrolon material, mobile phone shell and preparation method thereof |
-
2020
- 2020-09-28 CN CN202011037518.4A patent/CN112251008B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000007904A (en) * | 1998-06-25 | 2000-01-11 | Mitsubishi Eng Plast Corp | Molded article for oa equipment parts with excellent damping property |
| CN105153662A (en) * | 2015-07-23 | 2015-12-16 | 深圳华力兴新材料股份有限公司 | Glass fiber reinforced polycarbonate composite material and preparation method therefor |
| CN108192312A (en) * | 2018-01-12 | 2018-06-22 | 中山长虹电器有限公司 | The highlighted of metal/pearly-lustre illusion-colour texture with exquisiteness exempts to spray polycarbonate composite material and preparation method thereof |
| CN110358277A (en) * | 2019-06-21 | 2019-10-22 | 东莞市广正模具塑胶有限公司 | A kind of enhancing is flexible to exempt to spray makrolon material, mobile phone shell and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 冯猛: ""核—壳结构聚硅氧烷—丙烯酸酯弹性体的制备及其增韧PC/ABS合金研究"", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112251008B (en) | 2023-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113388194B (en) | Glass fiber reinforced polypropylene composition and preparation method and application thereof | |
| CN112375363A (en) | Glass fiber reinforced polycarbonate composition and preparation method and application thereof | |
| CN86102385A (en) | With the polypropylene is the resin combination of base-material | |
| CN112457645B (en) | Polycarbonate alloy composition and preparation method and application thereof | |
| CN108586944B (en) | Wollastonite/polypropylene composite material and preparation method thereof | |
| CN105482355A (en) | Reinforcing and toughening agent for 3D printing of ABS and ABS composite | |
| CN101215410B (en) | Polybutylene terephthalate modified resin | |
| CN110744050A (en) | Adhesive for metal powder injection molding and preparation method thereof | |
| CN112251008B (en) | Chemical-resistant anti-bending polycarbonate composite material and preparation and application thereof | |
| CN111925640B (en) | Anti-bending polycarbonate composite material for injection molding and preparation and application thereof | |
| CN112480626B (en) | Glass fiber reinforced polycarbonate composition and preparation method and application thereof | |
| CN110041676B (en) | Polylactic acid 3D printing material with adjustable metal color and glossiness and preparation method thereof | |
| CN102888070A (en) | Flat television front shell and manufacture method thereof | |
| CN106317753B (en) | A kind of heat-proof ABS resin composition improving chemical resistance | |
| CN109971150B (en) | Scratch-resistant cold-resistant spraying-free PC material for luggage shell and preparation method thereof | |
| CN110437594B (en) | Preparation method of golden pigment master batch, polypropylene composite material and preparation method thereof | |
| CN115947993B (en) | Polypropylene composition and preparation method and application thereof | |
| CN109486156B (en) | Flame-retardant extrusion-grade PC/ABS composite material | |
| CN113831648B (en) | Ultra-high molecular weight polyethylene reinforced polypropylene composite material and preparation method thereof | |
| CN104629088A (en) | Pearl essence coated polymer microspheres and preparation method and application thereof | |
| CN111978700B (en) | Anti-bending polycarbonate composite material and preparation method and application thereof | |
| CN108707279A (en) | A kind of eutectic lapping defect exempts from spray coating polypropylene composite material and preparation method without current mark | |
| CN111040407B (en) | High-flow high-rigidity aging-resistant glass fiber reinforced PC material and preparation method thereof | |
| CN111019318B (en) | PC modified material with fine metal texture and preparation method thereof | |
| CN112457748B (en) | High-toughness low-temperature-resistant powder coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |