CN115286915A - Preparation method of polycarbonate composition - Google Patents
Preparation method of polycarbonate composition Download PDFInfo
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- CN115286915A CN115286915A CN202211063883.1A CN202211063883A CN115286915A CN 115286915 A CN115286915 A CN 115286915A CN 202211063883 A CN202211063883 A CN 202211063883A CN 115286915 A CN115286915 A CN 115286915A
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- polycarbonate
- glass fiber
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- flame retardant
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention discloses a preparation method of a polycarbonate composition, which belongs to the technical field of high polymer materials and comprises the following raw materials in parts by weight: 50-90 parts of polycarbonate, 6-10 parts of glass fiber, 8-20 parts of modifier, 15-20 parts of flame retardant, 0.75-1.5 parts of antioxidant and 6-8 parts of toughening agent. The polycarbonate composition has the advantages that the components are uniformly distributed, the polycarbonate composition has the polycarbonate performance, the problems of easy stress cracking, sensitive gaps, poor solvent resistance and the like caused by internal stress are solved, and the processing fluidity, the flame retardance, the heat resistance, the low-temperature impact resistance and the like are improved.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a preparation method of a polycarbonate composition.
Background
Polycarbonate has good light transmittance and excellent mechanical properties, and thus can be widely used in various fields. The benzene ring structure on the molecular chain segment of the polycarbonate enables molecular chains to be strongly intertwined with each other and not easy to fall off, the polycarbonate is not easy to deform under the action of external force, and has high dimensional stability, and meanwhile, the polycarbonate has good heat resistance, excellent aging resistance and good mechanical properties. Due to the structural particularity of PC, the PC is the fastest growing general engineering plastic of five engineering plastics.
Although PC has many advantages, the application of PC is limited because of high melt viscosity, poor fluidity, easy stress cracking and poor solvent resistance, and easy stress cracking and expansion in solvents and alkaline environments, and higher requirements on flame retardance, heat resistance, low-temperature impact resistance and dielectric properties are highlighted along with the development of the new energy automobile industry. How to show good flame retardance and heat resistance on the premise of ensuring good low-temperature impact resistance, higher flexural modulus and other mechanical indexes of PC is one of the problems to be solved urgently at present.
Disclosure of Invention
The present invention is directed to a method for preparing a polycarbonate composition to solve the above-mentioned problems.
In order to achieve the purpose, the invention provides the following scheme:
one of the schemes of the invention is to provide a polycarbonate composition, which comprises the following raw materials in parts by weight: 50-90 parts of polycarbonate, 6-10 parts of glass fiber, 8-20 parts of modifier, 15-20 parts of flame retardant, 0.75-1.5 parts of antioxidant and 6-8 parts of toughening agent.
Further, the composition is prepared from the following raw materials in parts by weight: 70-90 parts of polycarbonate, 8-10 parts of glass fiber, 12-20 parts of modifier, 15-18 parts of flame retardant, 0.9-1.1 parts of antioxidant and 7-8 parts of toughening agent;
preferably, the composition consists of the following raw materials in parts by weight: 90 parts of polycarbonate, 10 parts of glass fiber, 20 parts of modifier, 15 parts of flame retardant, 1 part of antioxidant and 8 parts of toughening agent.
Further, the glass fiber is chopped glass fiber.
Furthermore, the modifier is one of polyolefin elastomer, low-density polyethylene and polypropylene;
preferably, the modifier is a polyolefin elastomer.
Furthermore, the flame retardant is one of 9, 10-dihydro-9-oxa-10-phosphoric acid cyclic anthracene-10-oxide and graphene.
Furthermore, the antioxidant is one or more of phosphite ester and hindered phenol.
Furthermore, the toughening agent is one of ethylene-methyl acrylate, ethylene-butyl acrylate and acrylonitrile-styrene-butyl acrylate copolymer.
The second embodiment of the present invention provides a method for preparing a polycarbonate composition, comprising the following steps:
(1) Weighing the raw materials in parts by weight;
(2) Drying the polycarbonate and the modifier, and mixing and stirring uniformly;
(3) Uniformly mixing and stirring the flame retardant, the antioxidant and the toughening agent, adding the mixture into the mixture obtained in the step (2), continuously adding the glass fiber, mixing and stirring to obtain a mixture;
(4) And (4) extruding the mixture obtained in the step (3), cooling and granulating to obtain the product.
Further, the extrusion in the step (4) is carried out at 200 to 300 ℃.
Furthermore, the extrusion is carried out by twin-screw vacuum extrusion, and the set rotating speed is 350-450 rpm.
Compared with the prior art, the invention discloses the following beneficial effects:
the glass fiber is selected as the raw material, the glass fiber has excellent mechanical strength, and the heat resistance, the mechanical property and the dimensional stability of the PC can be improved after the PC is modified by the glass fiber; the addition of the modifiers POE, LDPE and PP can improve the fluidity of the glass fiber/polycarbonate and ensure the stability of the mechanical property; the flame retardant is 9, 10-dihydro-9-oxa-10-phosphoric acid anthracene-10-oxide and graphene, compared with a traditional flame retardant system, the flame retardant system disclosed by the invention can show a good flame retardant effect and high flame retardant efficiency, shows excellent flame retardant efficiency, and cannot influence mechanical properties when being mixed with other substances.
The polycarbonate composition has the advantages of uniform distribution of all components, improved polycarbonate performance, easy stress cracking, sensitive gaps, poor solvent resistance and the like caused by internal stress, and improved processing fluidity, flame resistance, heat resistance, low-temperature impact resistance and the like.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but rather as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in that stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated herein by reference to disclose and describe the methods and/or materials in connection with which the documents are cited. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are all parts by mass unless otherwise specified.
Example 1
A polycarbonate composition is composed of the following raw materials in parts by weight: 50 parts of polycarbonate, 6 parts of glass fiber, 8 parts of modifier, 15 parts of flame retardant, 0.75 part of antioxidant and 6 parts of toughening agent;
wherein the glass fiber is chopped glass fiber; the modifier is low-density polyethylene; the flame retardant is 9, 10-dihydro-9-oxa-10-phosphoric acid cyclic anthracene-10-oxide; the antioxidant is phosphite ester; the toughening agent is ethylene-methyl acrylate.
Example 2
A polycarbonate composition is composed of the following raw materials in parts by weight: 90 parts of polycarbonate, 10 parts of glass fiber, 20 parts of modifier, 20 parts of flame retardant, 1.5 parts of antioxidant and 8 parts of toughening agent;
wherein the glass fiber is chopped glass fiber; the modifier is polypropylene; the flame retardant is 9, 10-dihydro-9-oxa-10-phosphoric acid cyclic anthracene-10-oxide; the antioxidant is hindered phenol; the toughening agent is ethylene-butyl acrylate.
Example 3
A polycarbonate composition is composed of the following raw materials in parts by weight: 70 parts of polycarbonate, 8 parts of glass fiber, 12 parts of modifier, 15 parts of flame retardant, 0.9 part of antioxidant and 7 parts of toughening agent;
wherein the glass fiber is chopped glass fiber; the modifier is polyolefin elastomer; the flame retardant is graphene; the antioxidant is a mixture of sodium phosphite and hindered phenol; the toughening agent is acrylonitrile-styrene-butyl acrylate copolymer.
Example 4
A polycarbonate composition is composed of the following raw materials in parts by weight: 90 parts of polycarbonate, 10 parts of glass fiber, 20 parts of modifier, 18 parts of flame retardant, 1.1 parts of antioxidant and 8 parts of toughening agent;
wherein the glass fiber is chopped glass fiber; the modifier is polyolefin elastomer; the flame retardant is 9, 10-dihydro-9-oxa-10-phosphoric acid cyclic anthracene-10-oxide; the antioxidant is sodium phosphite; the toughening agent is ethylene-methyl acrylate.
Example 5
A polycarbonate composition is composed of the following raw materials in parts by weight: 90 parts of polycarbonate, 10 parts of glass fiber, 20 parts of modifier, 15 parts of flame retardant, 1 part of antioxidant and 8 parts of toughening agent;
wherein the glass fiber is chopped glass fiber; the modifier is polyolefin elastomer; the flame retardant is graphene; the antioxidant is a mixture of phosphite ester and hindered phenol; the toughening agent is one of acrylonitrile-styrene-butyl acrylate copolymers.
Example 6
A method of making a polycarbonate composition, comprising the steps of:
(1) Weighing the raw materials in parts by weight;
(2) Drying the polycarbonate and the modifier, and mixing and stirring uniformly;
(3) Uniformly mixing and stirring the flame retardant, the antioxidant and the toughening agent, adding the mixture into the mixture obtained in the step (2), continuously adding the glass fiber, mixing and stirring to obtain a mixture;
(4) And (4) extruding the mixture obtained in the step (3) at 200 ℃ through a double screw in vacuum, setting the rotating speed to be 350rpm, and cooling and granulating to obtain the composite material.
Example 7
A method of making a polycarbonate composition, comprising the steps of:
(1) Weighing the raw materials in parts by weight;
(2) Drying the polycarbonate and the modifier, and mixing and stirring uniformly;
(3) Uniformly mixing and stirring the flame retardant, the antioxidant and the toughening agent, adding the mixture into the mixture obtained in the step (2), continuously adding the glass fiber, mixing and stirring to obtain a mixture;
(4) And (4) extruding the mixture obtained in the step (3) at 300 ℃ through a double screw in vacuum, setting the rotating speed to be 450rpm, and cooling and granulating to obtain the composite material.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. A polycarbonate composition characterized by: the composition is prepared from the following raw materials in parts by weight: 50-90 parts of polycarbonate, 6-10 parts of glass fiber, 8-20 parts of modifier, 15-20 parts of flame retardant, 0.75-1.5 parts of antioxidant and 6-8 parts of toughening agent.
2. The polycarbonate composition of claim 1, wherein: the composition is prepared from the following raw materials in parts by weight: 70-90 parts of polycarbonate, 8-10 parts of glass fiber, 12-20 parts of modifier, 15-18 parts of flame retardant, 0.9-1.1 parts of antioxidant and 7-8 parts of toughening agent;
preferably, the composition consists of the following raw materials in parts by weight: 90 parts of polycarbonate, 10 parts of glass fiber, 20 parts of modifier, 15 parts of flame retardant, 1 part of antioxidant and 8 parts of toughening agent.
3. The polycarbonate composition of claim 2, wherein: the glass fiber is chopped glass fiber.
4. The polycarbonate composition of claim 2, wherein: the modifier is one of polyolefin elastomer, low-density polyethylene and polypropylene;
preferably, the modifier is a polyolefin elastomer.
5. The polycarbonate composition of claim 2, wherein: the flame retardant is one of 9, 10-dihydro-9-oxa-10-phosphoric acid cyclic anthracene-10-oxide and graphene.
6. A polycarbonate composition according to claim 2, wherein: the antioxidant is one or more of phosphite ester and hindered phenol.
7. The polycarbonate composition of claim 2, wherein: the toughening agent is one of ethylene-methyl acrylate, ethylene-butyl acrylate and acrylonitrile-styrene-butyl acrylate copolymer.
8. A method for preparing a polycarbonate composition according to any one of claims 1 to 7, comprising the steps of:
(1) Weighing the raw materials in parts by weight;
(2) Drying the polycarbonate and the modifier, and mixing and stirring uniformly;
(3) Uniformly mixing and stirring the flame retardant, the antioxidant and the toughening agent, adding the mixture obtained in the step (2), continuously adding the glass fiber, mixing and stirring to obtain a mixture;
(4) And (4) extruding the mixture in the step (3), and cooling and granulating to obtain the product.
9. The method of claim 8, wherein: the extrusion in step (4) is carried out at 200 to 300 ℃.
10. The method of claim 9, wherein: the extrusion is carried out by twin-screw vacuum extrusion, and the set rotating speed is 350-450 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211063883.1A CN115286915A (en) | 2022-08-31 | 2022-08-31 | Preparation method of polycarbonate composition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211063883.1A CN115286915A (en) | 2022-08-31 | 2022-08-31 | Preparation method of polycarbonate composition |
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| CN202211063883.1A Pending CN115286915A (en) | 2022-08-31 | 2022-08-31 | Preparation method of polycarbonate composition |
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| CN103608404A (en) * | 2011-06-17 | 2014-02-26 | 出光兴产株式会社 | Polycarbonate resin composition and molded article using same |
| CN103709708A (en) * | 2013-12-19 | 2014-04-09 | 上海日之升新技术发展有限公司 | High-flowability fiberglass-reinforced halogen-free flame-retardant PC (polycarbonate) material and preparation method for same |
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