CN112778692A - Reinforced ABS (acrylonitrile-butadiene-styrene) composition with low expansion coefficient and preparation method thereof - Google Patents
Reinforced ABS (acrylonitrile-butadiene-styrene) composition with low expansion coefficient and preparation method thereof Download PDFInfo
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- CN112778692A CN112778692A CN202011631539.9A CN202011631539A CN112778692A CN 112778692 A CN112778692 A CN 112778692A CN 202011631539 A CN202011631539 A CN 202011631539A CN 112778692 A CN112778692 A CN 112778692A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2355/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2323/00 - C08J2353/00
- C08J2355/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
Abstract
The invention discloses a reinforced ABS composition with a low expansion coefficient and a preparation method thereof. The composition comprises the following components in parts by weight: 37-75 parts of ABS resin, 10-20 parts of polycarbonate, 10-30 parts of inorganic fiber, 1-5 parts of inorganic filler, 3-5 parts of toughening agent, 0.2-1 part of antioxidant, 0.2-1 part of lubricant and 0.1-1 part of the rest. The invention is used for the front frame of a liquid crystal television to obtain an appearance piece with reflective effect, highlight free spraying and highlight metal imitation effect, the invention enhances the screw combination of the prior double-screw extruder to ensure that the meshing blocks are not less than five groups, each group is not less than 3 blocks, wherein, the meshing blocks at the back of a natural exhaust port are not less than one group and comprise reverse meshing blocks, the length of a control fiber is 0.1-0.2mm, the shorter the shearing length of the glass fiber is, the more broken the glass fiber is, the smaller the difference of anisotropy of the material is, and the more stable the size of the material is. Polycarbonate and inorganic filling are introduced into an ABS (acrylonitrile-butadiene-styrene) reinforcing system to greatly reduce the expansion coefficient of a pure fiber reinforcing material, so that the assembly problem caused by unstable size in the later injection molding stage is solved.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a reinforced ABS composition with a low expansion coefficient and a preparation method thereof.
Background
Nowadays, environmental pollution is increasingly serious, energy conservation and emission reduction are not slow enough, how to research and develop a novel engineering plastic composite material to replace a metal material becomes a high and new technology with great significance and commercial value, in recent years, due to popularization of a high-light-steam injection molding technology, replacement of the metal material by a fiber reinforced material is greatly promoted, but anisotropy is caused by fiber orientation in an injection molding process of the fiber reinforced material, particularly, the expansion coefficient in the later period of an injection molding flowing direction is far more than that in the longitudinal direction, so that the difference of the stability of the later-period assembly size is overlarge, and the problem which needs to be solved urgently in the technical field is solved.
Disclosure of Invention
The invention aims to modify the existing glass fiber and carbon fiber reinforced ABS aiming at various defects of the existing glass fiber and carbon fiber reinforced ABS and can simultaneously overcome the problem of overlarge expansion coefficient.
The technical scheme adopted by the invention for realizing the purpose is as follows: the reinforced ABS composition with the low expansion coefficient comprises the following components in parts by weight:
the length of the fiber is controlled to be 0.1-0.2mm, the shorter the fiber shearing length is, the more broken the glass fiber is, the smaller the difference of anisotropy of the material is, and the more favorable the size stability of the material is; the molecular weight of the carbonate resin is 20000-30000, the MI value is 10-40g/10min, and more preferably 20-30g/10min, and the polycarbonate has a lower thermal expansion coefficient, so that the reduction of the expansion coefficient of the material combination is facilitated.
Further, in the above technical solution, the inorganic filler is one of talc powder, wollastonite, calcium carbonate, whisker silicon, and the like; the filling can be better dispersed among the fibers, and a recoil effect can be realized to counteract partial expansion transfer.
Further, in the above technical scheme, the ABS resin is prepared by bulk method or emulsion suspension method, and the rubber particle size contained therein is 0.1-0.4 μm.
Further, in the above technical solution, the fiber is any one of glass fiber, MF, long glass fiber, carbon fiber, aramid fiber, and silicon carbide fiber.
Further, in the above technical scheme, the toughening agent is high rubber powder or an acrylate elastomer.
Further, in the above technical solution, the antioxidant is one of triethylene glycol bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) acrylonitrile and tris (2, 4-di-tert-butylphenol) phosphite, or a mixture of pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and tris (2, 4-di-tert-butylphenyl) phosphite in a weight ratio of 1: 1 are mixed.
Further, in the above technical solution, the lubricant is one or more of EBS, TAF, and silicone powder.
Furthermore, in the above technical scheme, the molding process is RHCM, and the high-speed high-temperature molding technology is adopted, and the housing with the mirror surface effect is produced in the injection molding process of the fiber-added plastic.
Furthermore, in the above technical solution, the application fields include ultra-large liquid crystal display, ultra-thin notebook computer, ultra-thin mobile phone, and other various fields with high gloss and high strength.
The preparation method of the reinforced ABS composition with low expansion coefficient comprises the following steps:
1) weighing the materials according to the formula;
2) pouring the materials into a stirring barrel to be stirred for 5-10 minutes at the stirring speed of 300-450 rpm so as to mix the materials;
3) treating the glass fiber with a coupling agent, and drying;
4) the mixed raw materials are put into a specially improved double-screw extruder for melt extrusion granulation, and the processing technology is as follows: the first zone of the double-screw extruder is 200-fold, the second zone is 215-fold, the third zone is 215-fold, the fourth zone is 215-fold, the fifth zone is 220-fold, the sixth zone is 225-fold, the seventh zone is 220-fold, and the eighth zone is 215-fold, 220-fold; the screw rotation speed is 300-450 rpm.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. realizes the material with high light, super strength and high hardness.
2. The problem of the dimensional stability of the common fiber reinforced ABS material is solved.
3. The expansion coefficient of the material is reduced, and the later assembly problem of the injection molding piece is solved.
Description of the drawings:
FIG. 1 is a step diagram of step 3) of the process for preparing a low coefficient of expansion reinforced ABS composition according to the present invention.
Detailed Description
The invention is further illustrated by the following examples
The invention provides a reinforced ABS composition with low expansion coefficient and a preparation method thereof, wherein the reinforced ABS composition with low expansion coefficient is prepared from the following materials in parts by weight:
during preparation, the components are mixed in a mixing tank according to the weight ratio of the formula for 5 minutes, and the glass fiber which is processed in advance is melted and extruded by a double-screw extruder for granulation. The processing technology comprises the following steps: the first zone of the double-screw extruder is 200-fold, the second zone is 215-fold, the third zone is 215-fold, the fourth zone is 215-fold, the fifth zone is 220-fold, the sixth zone is 225-fold, the seventh zone is 220-fold, and the eighth zone is 215-fold, 220-fold; the screw rotation speed is 300-450 rpm.
When the glass fiber is treated, the glass fiber is treated by a coupling agent and dried, and the steps are shown in figure 1.
Embodiments are as in table one below; at the same time, the material examples 1 to 3 and comparative example 1 were combined by means of a screw: the screw meshing blocks of the double-screw extruder are combined into five groups, each group comprises 3 meshing blocks, and the second group of meshing blocks behind the natural gas outlet comprises reverse meshing blocks; example 4 following screw combination: the screw meshing blocks of the double-screw extruder are combined into five groups, 3 meshing blocks are arranged in each group before natural exhaust, and 2 meshing blocks are arranged in each group after a natural exhaust port.
Table one: examples
The manufacturing method is combined with the RHCM injection molding process to realize the manufacturing of the 55-inch ultrathin, ultralight and narrow-edge liquid crystal television front frame, the manufactured product achieves the light reflecting effect, no deformation or warping phenomenon exists, and the surface hardness reaches 2H. The technical index is reached, and the dimension of the finished piece stored in the later period is measured, and the result is shown in the following table II.
Table two: dimensional results
Results of the above tests examples 1-3 and comparative example 1 it can be seen that the addition of both polycarbonate and talc favours the dimensional stability of the material. By comparing example 1 with example 4, it can be found that the combination of stronger screw shearing is beneficial to the dimensional stability, the shearing length of the glass fiber is changed along with the change of the shearing strength of the screw after the glass fiber is sheared by the screw, the stronger the screw shearing is, the shorter the glass fiber length is, while the plastic composite material prepared by using the fibrous glass fiber has anisotropy, that is, the property along the glass fiber direction is inconsistent with the property perpendicular to the glass fiber direction, and the shorter the length after the glass fiber is sheared is, the smaller the difference of the anisotropy is.
Claims (8)
1. A reinforced ABS composition having a low coefficient of expansion, characterized by: the paint comprises the following components in parts by weight:
the screw combination of the double-screw extruder is that the meshing blocks are not less than five groups, each group is not less than 3 blocks, wherein, the meshing blocks not less than one group behind the natural gas outlet comprise reverse meshing blocks, and the fiber length is controlled to be 0.1-0.2 mm;
the molecular weight of the carbonate resin is 20000-30000, and the MI value is 10-40g/10 min;
the inorganic filler is one of talcum powder, wollastonite, calcium carbonate, whisker silicon and the like; the filling can be better dispersed among the fibers, and a recoil effect can be realized to counteract partial expansion transfer.
2. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the ABS resin is prepared and produced by a bulk method or an emulsion suspension method, and the size of rubber particles contained in the ABS resin is 0.1-0.4 micron.
3. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the fiber is any one of glass fiber, MF, long glass fiber, carbon fiber, aramid fiber and silicon carbide fiber.
4. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the toughening agent is high rubber powder or an acrylate elastomer.
5. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the antioxidant is one of triethylene glycol bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) acrylonitrile and tris (2, 4-di-tert-butylphenol) phosphite ester, or the antioxidant is prepared by mixing tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tris (2, 4-di-tert-butylphenyl) phosphite in a weight ratio of 1: 1 are mixed.
6. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the lubricant is one or more of EBS, TAF and silicone powder.
7. The low coefficient of expansion reinforced ABS composition of claim 1 wherein: the ABS composition is used for forming a plastic product by adopting an RHCM technology, and a shell with a mirror surface effect is produced in an injection molding process of fiber-added plastic.
8. A process for the preparation of the low coefficient of expansion reinforced ABS composition of claim 1, wherein: the preparation method comprises the following steps:
1) weighing the materials according to the formula;
2) pouring the materials into a stirring barrel to be stirred for 5-10 minutes at the stirring speed of 300-450 rpm so as to mix the materials;
3) treating the glass fiber with a coupling agent, and drying;
4) the mixed raw materials are put into a specially improved double-screw extruder for melt extrusion granulation, and the processing technology is as follows: the first zone of the double-screw extruder is 200-fold, the second zone is 215-fold, the third zone is 215-fold, the fourth zone is 215-fold, the fifth zone is 220-fold, the sixth zone is 225-fold, the seventh zone is 220-fold, and the eighth zone is 215-fold, 220-fold; the screw rotation speed is 300-450 rpm.
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| CN202011631539.9A CN112778692B (en) | 2020-12-31 | 2020-12-31 | Reinforced ABS (acrylonitrile-butadiene-styrene) composition with low expansion coefficient and preparation method thereof |
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| CN202011631539.9A CN112778692B (en) | 2020-12-31 | 2020-12-31 | Reinforced ABS (acrylonitrile-butadiene-styrene) composition with low expansion coefficient and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163983A (en) * | 2021-12-17 | 2022-03-11 | 长江大学 | Oil-absorbing expansion composition and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163983A (en) * | 2021-12-17 | 2022-03-11 | 长江大学 | Oil-absorbing expansion composition and preparation method thereof |
| CN114163983B (en) * | 2021-12-17 | 2023-01-24 | 长江大学 | Oil-absorbing expansion composition and preparation method thereof |
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