CN111675891A - Preparation method of flame-retardant PC-PET plastic alloy - Google Patents
Preparation method of flame-retardant PC-PET plastic alloy Download PDFInfo
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- CN111675891A CN111675891A CN202010464206.5A CN202010464206A CN111675891A CN 111675891 A CN111675891 A CN 111675891A CN 202010464206 A CN202010464206 A CN 202010464206A CN 111675891 A CN111675891 A CN 111675891A
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a preparation method of a flame-retardant PC-PET plastic alloy, which comprises the following steps: s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%; s2, weighing the following raw materials in percentage by weight: 65-80 parts of PC resin, 10-20 parts of PET resin, 3-5 parts of polyphosphate ester flame retardant, 3-5 parts of toughening agent, 3-6 parts of lubricant, 0.2-0.5 part of antioxidant and 0.1-0.4 part of anti-dripping agent; s3: putting the dried PC resin and PET resin, toughening agent, lubricant, antioxidant and anti-dripping agent into a stirrer, and mixing and stirring; s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, and mixing and extruding the polyphosphate flame retardant and the melted mixture; s5, adding the extruded mixture into a spinning cooling tank for cooling; s6: and pre-drying, granulating and drying the cooled mixture.
Description
Technical Field
The invention relates to the technical field of alloy plastics, in particular to a preparation method of a flame-retardant PC-PET plastic alloy.
Background
The plastic alloy is a new material with high performance, functionalization and specialization obtained by a physical blending or chemical grafting method. The plastic alloy product can be widely used in the fields of automobiles, electronics, precise instruments, office equipment, packaging materials, building materials and the like. It can improve or enhance the performance of the existing plastics and reduce the cost, and has become one of the most active varieties in the plastics industry.
The PC resin has excellent impact resistance, heat resistance, good dimensional stability and electrical insulating property, has the characteristics of no toxicity and low water absorption, and can be used in a wider temperature range; meanwhile, the engineering grade PET has poor toughness, and if the toughness cannot be improved, the applicability is not strong. After the PC is added, halogen-free flame retardant products are developed, which has great significance in environmental protection and practical application.
When the PC resin and the PET resin are blended, the compatibility of the PC resin and the PET resin is poor, the toughness and the flame retardance of the product are reduced, and the effect of the product is influenced, so that an additive which can be effective on the two mixtures is needed to improve the flame retardance of the PC-PET plastic alloy.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: when the PC resin and the PET resin are blended, the compatibility of the PC resin and the PET resin is poor, the toughness and the flame retardance of the product are reduced, and the effect of the product is influenced, so that an additive which can be effective on the two mixtures is needed to improve the flame retardance of the PC-PET plastic alloy.
(II) technical scheme
In order to overcome the problems that the PC resin and the PET resin have poor compatibility after being blended, the toughness and the flame retardance of the product are reduced, and the effect of the product is influenced, the invention provides a preparation method of a flame-retardant PC-PET plastic alloy, which adopts the following technical scheme:
a preparation method of a flame-retardant PC-PET plastic alloy comprises the following steps:
s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%;
s2, weighing the following raw materials in percentage by weight: 65-80 parts of PC resin, 10-20 parts of PET resin, 3-5 parts of polyphosphate ester flame retardant, 3-5 parts of toughening agent, 3-6 parts of lubricant, 0.2-0.5 part of antioxidant and 0.1-0.4 part of anti-dripping agent;
s3: putting the dried PC resin and PET resin, toughening agent, lubricant, antioxidant and anti-dripping agent into a stirrer, and mixing and stirring;
s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, and mixing and extruding the polyphosphate flame retardant and the melted mixture;
s5, adding the extruded mixture into a spinning cooling tank for cooling;
s6: and pre-drying, granulating and drying the cooled mixture.
Furthermore, the polyphosphate ester flame retardant is prepared by performing polycondensation reaction on phenylphosphonic dichloride and bisphenol A in a molten state.
Further, the lubricant is a fatty acid ester lubricant.
Further, the toughening agent is MBS toughening agent.
Further, the anti-dripping agent is polytetrafluoroethylene.
Further, in step S4, the temperatures of the zones of the twin-screw extruder are: the temperature of the first zone is 240 ℃, the temperature of the second zone is 240 ℃, the temperature of the third zone is 250 ℃, the temperature of the fourth zone is 250 ℃, the temperature of the fifth zone is 250 ℃, the temperature of the sixth zone is 250 ℃, the temperature of the seventh zone is 260 ℃, the temperature of the eighth zone is 260 ℃ and the temperature of the head is 260 ℃.
(III) advantageous effects
The invention has the beneficial effects that: the invention selects proper additive, has good dispersibility, and can prepare the product with stable performance, and the additive is effective to each component of the mixture, so that the performance of the final product can not be reduced, and the excellent performance of the product can be ensured.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying examples, in which some, but not all examples of the invention are shown. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%;
s2, weighing the following raw materials in percentage by weight: 65 parts of PC resin, 20 parts of PET resin, 5 parts of polyphosphate flame retardant, 4.6 parts of MBS toughening agent, 4.5 parts of fatty acid ester lubricant, 0.5 part of antioxidant and 0.4 part of polytetrafluoroethylene anti-dripping agent, wherein the polyphosphate flame retardant is prepared by performing polycondensation reaction on phenylphosphonyl dichloride and bisphenol A in a molten state.
S3: putting the dried PC resin, the dried PET resin, the MBS toughening agent, the fatty acid ester lubricant, the antioxidant and the polytetrafluoroethylene anti-dripping agent into a stirrer, and mixing and stirring;
s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, mixing with the melted mixture, and extruding, wherein the temperature of each area of the double-screw extruder is as follows: the temperature of the first zone is 240 ℃, the temperature of the second zone is 240 ℃, the temperature of the third zone is 250 ℃, the temperature of the fourth zone is 250 ℃, the temperature of the fifth zone is 250 ℃, the temperature of the sixth zone is 250 ℃, the temperature of the seventh zone is 260 ℃, the temperature of the eighth zone is 260 ℃, and the temperature of the head is 260 DEG C
S5, adding the extruded mixture into a spinning cooling tank for cooling;
s6: and pre-drying, granulating and drying the cooled mixture.
Example two:
s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%;
s2, weighing the following raw materials in percentage by weight: 75 parts of PC resin, 10 parts of PET resin, 5 parts of polyphosphate flame retardant, 4.1 parts of MBS toughening agent, 5 parts of fatty acid ester lubricant, 0.5 part of antioxidant and 0.4 part of polytetrafluoroethylene anti-dripping agent, wherein the polyphosphate flame retardant is prepared by performing polycondensation reaction on phenylphosphonic dichloride and bisphenol A in a molten state.
S3: putting the dried PC resin, the dried PET resin, the MBS toughening agent, the fatty acid ester lubricant, the antioxidant and the polytetrafluoroethylene anti-dripping agent into a stirrer, and mixing and stirring;
s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, mixing with the melted mixture, and extruding, wherein the temperature of each area of the double-screw extruder is as follows: the temperature of the first zone is 240 ℃, the temperature of the second zone is 240 ℃, the temperature of the third zone is 250 ℃, the temperature of the fourth zone is 250 ℃, the temperature of the fifth zone is 250 ℃, the temperature of the sixth zone is 250 ℃, the temperature of the seventh zone is 260 ℃, the temperature of the eighth zone is 260 ℃, and the temperature of the head is 260 DEG C
S5, adding the extruded mixture into a spinning cooling tank for cooling;
s6: and pre-drying, granulating and drying the cooled mixture.
Example three:
s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%;
s2, weighing the following raw materials in percentage by weight: 80 parts of PC resin, 10 parts of PET resin, 3.2 parts of polyphosphate ester flame retardant, 3.3 parts of MBS toughening agent, 3.2 parts of fatty acid ester lubricant, 0.2 part of antioxidant and 0.1 part of polytetrafluoroethylene anti-dripping agent, wherein the polyphosphate ester flame retardant is prepared by performing polycondensation reaction on phenylphosphonyl dichloride and bisphenol A in a molten state.
S3: putting the dried PC resin, the dried PET resin, the MBS toughening agent, the fatty acid ester lubricant, the antioxidant and the polytetrafluoroethylene anti-dripping agent into a stirrer, and mixing and stirring;
s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, mixing with the melted mixture, and extruding, wherein the temperature of each area of the double-screw extruder is as follows: the temperature of the first zone is 240 ℃, the temperature of the second zone is 240 ℃, the temperature of the third zone is 250 ℃, the temperature of the fourth zone is 250 ℃, the temperature of the fifth zone is 250 ℃, the temperature of the sixth zone is 250 ℃, the temperature of the seventh zone is 260 ℃, the temperature of the eighth zone is 260 ℃, and the temperature of the head is 260 DEG C
S5, adding the extruded mixture into a spinning cooling tank for cooling;
s6: and pre-drying, granulating and drying the cooled mixture.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A preparation method of flame-retardant PC-PET plastic alloy is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing before batching, drying the PC resin and the PET resin until the water content is less than 1%;
s2, weighing the following raw materials in percentage by weight: 65-80 parts of PC resin, 10-20 parts of PET resin, 3-5 parts of polyphosphate ester flame retardant, 3-5 parts of toughening agent, 3-6 parts of lubricant, 0.2-0.5 part of antioxidant and 0.1-0.4 part of anti-dripping agent;
s3: putting the dried PC resin and PET resin, toughening agent, lubricant, antioxidant and anti-dripping agent into a stirrer, and mixing and stirring;
s4: adding the stirred mixture into a double-screw extruder for melting, adding a polyphosphate flame retardant from a side feeding port of the double-screw extruder, and mixing and extruding the polyphosphate flame retardant and the melted mixture;
s5, adding the extruded mixture into a spinning cooling tank for cooling;
s6: and pre-drying, granulating and drying the cooled mixture.
2. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: the polyphosphate flame retardant is prepared by performing polycondensation reaction on phenylphosphonic dichloride and bisphenol A in a molten state.
3. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: the lubricant is fatty acid ester lubricant.
4. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: the toughening agent is an MBS toughening agent.
5. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: the antioxidant is phosphite antioxidant.
6. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: the anti-dripping agent is polytetrafluoroethylene.
7. The preparation method of the flame-retardant PC-PET plastic alloy according to claim 1, characterized in that: in the step S4, the temperatures of the zones of the twin-screw extruder are: the temperature of the first zone is 240 ℃, the temperature of the second zone is 240 ℃, the temperature of the third zone is 250 ℃, the temperature of the fourth zone is 250 ℃, the temperature of the fifth zone is 250 ℃, the temperature of the sixth zone is 250 ℃, the temperature of the seventh zone is 260 ℃, the temperature of the eighth zone is 260 ℃ and the temperature of the head is 260 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010464206.5A CN111675891A (en) | 2020-05-27 | 2020-05-27 | Preparation method of flame-retardant PC-PET plastic alloy |
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| CN202010464206.5A CN111675891A (en) | 2020-05-27 | 2020-05-27 | Preparation method of flame-retardant PC-PET plastic alloy |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712793A (en) * | 2009-09-06 | 2010-05-26 | 从化市聚赛龙工程塑料有限公司 | Low temperature resistant environment-friendly inflaming retarding PC/PET alloy and method for preparing same |
| CN104693714A (en) * | 2013-12-04 | 2015-06-10 | 青岛佳亿阳工贸有限公司 | Flame-retardant modified PC/PET alloy and preparation method thereof |
| CN106905674A (en) * | 2017-04-20 | 2017-06-30 | 宁波浙铁大风化工有限公司 | A kind of Flame-retardant PET and PC composites and preparation method thereof |
| CN110885545A (en) * | 2019-12-17 | 2020-03-17 | 东莞市德发塑胶科技有限公司 | Weather-resistant flame-retardant PC/PBT alloy and preparation method thereof |
-
2020
- 2020-05-27 CN CN202010464206.5A patent/CN111675891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712793A (en) * | 2009-09-06 | 2010-05-26 | 从化市聚赛龙工程塑料有限公司 | Low temperature resistant environment-friendly inflaming retarding PC/PET alloy and method for preparing same |
| CN104693714A (en) * | 2013-12-04 | 2015-06-10 | 青岛佳亿阳工贸有限公司 | Flame-retardant modified PC/PET alloy and preparation method thereof |
| CN106905674A (en) * | 2017-04-20 | 2017-06-30 | 宁波浙铁大风化工有限公司 | A kind of Flame-retardant PET and PC composites and preparation method thereof |
| CN110885545A (en) * | 2019-12-17 | 2020-03-17 | 东莞市德发塑胶科技有限公司 | Weather-resistant flame-retardant PC/PBT alloy and preparation method thereof |
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Application publication date: 20200918 |