CN113667283B - Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof - Google Patents
Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof Download PDFInfo
- Publication number
- CN113667283B CN113667283B CN202110808362.3A CN202110808362A CN113667283B CN 113667283 B CN113667283 B CN 113667283B CN 202110808362 A CN202110808362 A CN 202110808362A CN 113667283 B CN113667283 B CN 113667283B
- Authority
- CN
- China
- Prior art keywords
- hydrolysis
- parts
- pbt resin
- reinforced pbt
- chain extender
- 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.)
- Active
Links
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 37
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 37
- 229920005989 resin Polymers 0.000 title claims abstract description 33
- 239000011347 resin Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 25
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 25
- 239000004970 Chain extender Substances 0.000 claims abstract description 22
- 239000003365 glass fiber Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000002667 nucleating agent Substances 0.000 claims abstract description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 claims abstract description 5
- 230000000655 anti-hydrolysis Effects 0.000 claims abstract description 3
- 239000004593 Epoxy Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 150000001718 carbodiimides Chemical class 0.000 claims description 3
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical group C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 125000001741 organic sulfur group Chemical group 0.000 claims description 3
- 150000002989 phenols Chemical class 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000005469 granulation Methods 0.000 abstract description 3
- 230000003179 granulation Effects 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 125000003700 epoxy group Chemical group 0.000 abstract description 2
- 125000000524 functional group Chemical group 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 41
- 230000000052 comparative effect Effects 0.000 description 25
- 239000002994 raw material Substances 0.000 description 12
- 230000014759 maintenance of location Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical group C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 229920006258 high performance thermoplastic Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical compound CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 description 1
- 239000004209 oxidized polyethylene wax Substances 0.000 description 1
- 235000013873 oxidized polyethylene wax Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C08J5/10—Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/914—Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/916—Dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a hydrolysis-resistant reinforced PBT resin and a preparation method thereof; the resin comprises the following components in parts by weight: 60-80 parts of PBT, 20-40 parts of glass fiber, 0.5-3 parts of anti-hydrolysis agent, 0.2-2 parts of chain extender, 0.5-1.5 parts of nucleating agent, 0.3-1.0 part of antioxidant, 0.1-1.0 part of lubricant and 3-12 parts of polytetrafluoroethylene. The chain extender contains high-content epoxy groups and has higher reaction activity, and reacts with terminal functional groups of PBT in the processing process, so that the molecular chain expansion molecular weight is increased, the content of terminal carboxyl is reduced, and the hydrolysis resistance of the material is improved; particularly, the low molecular weight PTFE powder is added, on one hand, the PTFE powder is used as an organic nucleating agent to improve the crystallinity of PBT, so that the structure is more compact, and the hydrolysis resistance is improved, on the other hand, the low molecular weight PTFE powder tends to be distributed on the surface in the processes of extrusion granulation and injection molding, so that the water vapor blocking effect can be realized, and the hydrolysis resistance is further improved.
Description
Technical Field
The invention belongs to the technical field of materials, relates to a glass fiber reinforced PBT resin material, and particularly relates to a hydrolysis-resistant reinforced PBT resin and a preparation method thereof.
Background
Polybutylene terephthalate (PBT) is a high-performance thermoplastic resin, has the characteristics of temperature resistance, oil resistance, chemical corrosion resistance, quick forming and the like, and is widely applied. Meanwhile, with the design trend of replacing steel with plastics, the reinforced material taking PBT as a base material has wide application in the fields of electronics, electricity, automobile industry and buildings due to the excellent mechanical strength of the reinforced material.
However, in practical use, the glass fiber reinforced PBT material has some limitations, for example, because polyester is sensitive to moisture and heat, the long-term use in high-humidity and high-heat environments has a risk of failure, the retention rate of mechanical properties is yet to be improved, and the application of the glass fiber reinforced PBT material in some fields is limited.
At present, the hydrolysis resistance of the reinforced PBT is improved by adding an organic hydrolysis-resistant agent, the improvement is limited, although the stability of the hydrolysis resistance can be further improved by increasing the addition amount, the cost needs to be greatly improved, the mechanical property can be influenced to a certain extent, and the integral improvement range is limited; meanwhile, the crystallization degree of the PBT is improved by adding the nucleating agent, and the hydrolysis resistance of the PBT can also be improved, wherein the inorganic nucleating agent is mainly used, the addition amount is not too high, otherwise, the mechanical property is reduced, and the influence on the mechanical property is caused. Therefore, the hydrolysis resistance of the reinforced PBT material is further improved, and the application significance is very important.
Disclosure of Invention
The invention aims to provide a hydrolysis-resistant reinforced PBT resin and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a hydrolysis-resistant reinforced PBT resin, which comprises the following components in parts by weight:
60-80 parts of PBT, 20-40 parts of glass fiber, 0.5-3 parts of anti-hydrolysis agent, 0.2-2 parts of chain extender, 0.5-1.5 parts of nucleating agent, 0.3-1.0 part of antioxidant, 0.1-1.0 part of lubricant and 3-12 parts of polytetrafluoroethylene.
The PBT is a PBT raw material with low terminal carboxyl group content, and the terminal carboxyl group content of the PBT is less than 5mol/t. The weight average molecular weight of the PBT is 20000-30000.
The glass fiber is alkali-free glass fiber with the diameter of 10-20um.
The hydrolysis-resistant agent is polymeric carbodiimide. The weight average molecular weight is 15000-25000.
The chain extender is an epoxy chain extender and comprises glycidyl ester type chain extenders and glycidyl ether type chain extenders. The epoxy chain extender has an epoxy equivalent weight of 300-600.
The nucleating agent is an inorganic nucleating agent and is one of talcum powder, calcium carbonate and mica powder.
The antioxidant is an antioxidant combination simultaneously comprising hindered phenols and organic sulfur, and the weight ratio is 2:1.
The lubricant is one of acrylic acid ethylene copolymer wax, oxidized polyethylene wax and polyol ester wax.
The polytetrafluoroethylene is low molecular weight PTFE. The weight average molecular weight is 200000-300000.
The invention also relates to a preparation method of the hydrolysis-resistant reinforced PBT resin, which specifically comprises the following steps:
s1, drying PBT in a drying box for later use;
preparing the following components in parts by weight:
s2, adding all the components except the glass fiber into a high-speed mixer, and uniformly mixing;
s2, adding the mixed materials in the high-speed mixer into a double-screw extruder, and adding the glass fibers in a side feeding manner; and extruding and granulating to obtain the hydrolysis-resistant reinforced PBT resin.
In the step S1, the drying treatment is drying for 4 to 6 hours at the temperature of between 125 and 135 ℃.
In the step S3, during extrusion granulation, the rotation speed of the screw machine is controlled to be 400-600 rpm, and the temperature is controlled to be 260-280 ℃.
The invention also relates to application of the hydrolysis-resistant reinforced PBT resin in the fields of automobile electronic industry, electric tools, home appliance product accessories, industrial parts and building materials. The adhesive is particularly mainly used for automotive interiors and electronic product shells.
Compared with the prior art, the invention has the following beneficial effects:
(1) The chain extender contains high-content epoxy groups and has higher reaction activity, and reacts with terminal functional groups of PBT in the processing process, so that the molecular chain expansion molecular weight is increased, the content of terminal carboxyl is reduced, and the hydrolysis resistance of the material is improved.
(2) The low molecular weight PTFE powder is particularly added into the formula, on one hand, the PTFE can be used as an organic nucleating agent to improve the crystallinity of PBT, so that the structure is more compact, and the hydrolysis resistance is improved, on the other hand, the low molecular weight PTFE tends to be distributed on the surface in the processes of extrusion granulation and injection molding, and can play a role in blocking water vapor, so that the hydrolysis resistance is further improved, and meanwhile, the PTFE has a lubricating function, is beneficial to improving the retention length of glass fibers in the processing process, and also has an effect of improving the rigidity of the material.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the invention.
Example 1
The embodiment relates to a preparation method of hydrolysis-resistant reinforced PBT resin, which comprises the following steps:
adding the raw materials except the glass fibers into a high-speed mixer according to the weight percentage of the components in the formula in the table 1 for fully mixing;
adding the uniformly mixed raw materials into a double-screw extruder, adding glass fibers in a side feeding manner, controlling the rotating speed of the double-screw extruder to be 300-500 rpm, controlling the temperature to be 270-290 ℃, and extruding and granulating;
wherein, the compositions of the materials in the table 1 are as follows:
PBT raw material, wherein the content of terminal carboxyl is less than 5mol/t, and the PBT is produced by a mechanical instrument;
the hydrolysis resistant agent is polymeric carbodiimide which is sold in the market;
a chain extender, wherein glycidyl ether type epoxy resin is selected in example 1, specifically bisphenol A type epoxy resin, and the epoxy equivalent is 400; in other embodiments, glycidyl ester type epoxy resin is selected, and is particularly m-dimethyl benzene epoxy resin which is sold in the market;
the glass fiber is alkali-free glass fiber with the diameter of 15um and is sold in the market;
the nucleating agent is talcum powder which is sold in the market;
PTFE is low molecular weight PTFE powder and is sold in the market;
the antioxidant is a mixture of hindered phenols and organic sulfur in a proportion of 2:1;
the lubricant is acrylic acid ethylene copolymerization wax, and is sold in the market.
Examples 2 to 8
Examples 2 to 8 provide a process for preparing hydrolysis resistant reinforced PBT resin, the weight ratio of the raw materials is shown in Table 1, and the preparation process is the same as example 1.
Comparative example 1
This comparative example provides a process for the preparation of reinforced PBT resin, the raw material weight ratios are shown in Table 1, the process is the same as in example 1. In contrast to example 1, no chain extender was added to the formulation.
Comparative example 2
This comparative example provides a process for the preparation of reinforced PBT resin, the raw material weight ratios are shown in Table 1, the process is the same as in example 1. In contrast to example 1, no PTFE was added to the formulation.
Comparative example 3
This comparative example provides a process for the preparation of reinforced PBT resin, with the raw materials in the proportions by weight shown in Table 1, and the process is the same as in example 1. Compared with the example 1, the addition amount of PTFE in the formula is increased.
Comparative example 4
This comparative example provides a process for the preparation of reinforced PBT resin, with the raw materials in the proportions by weight shown in Table 1, and the process is the same as in example 1. Compared with the example 1, the addition amount of the chain extender in the formula is increased.
Comparative example 5
This comparative example provides a process for the preparation of reinforced PBT resin, the raw material weight ratios are shown in Table 1, the process is the same as in example 1. Compared with the example 1, the chain extender in the formula is bisphenol A type epoxy resin, and the epoxy equivalent is 100.
Comparative example 6
This comparative example provides a process for the preparation of reinforced PBT resin, the raw material weight ratios are shown in Table 1, the process is the same as in example 1. In comparison with example 1, the carboxyl end group content of the PBT in the formulation is 8mol/t.
Comparative example 7
This comparative example provides a process for the preparation of reinforced PBT resin, with the raw materials in the proportions by weight shown in Table 1, and the process is the same as in example 1. In comparison with example 1, the formulation used was a high molecular weight PTFE powder with a weight average molecular weight of 1000000.
TABLE 1 corresponding table of the ratio of each component in examples and comparative examples
After the reinforced PBT resins prepared in examples 1-6 and comparative examples 1-7 are dried at 80 ℃ for 4h, standard physical property sample bars are injection molded under the same injection molding condition according to ISO standard, and the physical properties are tested, and the specific test standards and conditions are shown in Table 2. The conditions of the damp-heat aging treatment are as follows: temperature 85 ℃/relative humidity 85% rh, treatment time: 1000H.
TABLE 2 physical Properties and test methods corresponding tables
| Test item | Abbreviations | Test conditions | Test method |
| Melt index | MI | 260℃*2.16kg | ISO 1133-1:2011(E) |
| Tensile strength | TS | 5mm/min | ISO 527:2012(E) |
| Elongation at break | EL | 5mm/min | ISO 527:2012(E) |
| Flexural modulus | FM | 2mm/min | ISO 178:2010/Amd.1:2013(E) |
| Charpy unnotched impact Strength | IS | 23℃ | ISO 179-1:2010(E) |
The results of the physical property tests of the reinforced PBT resins of examples 1 to 6 and comparative examples 1 to 7 are shown in tables 3 and 4. Wherein the TS retention rate IS TS-1000H/TS, the EL retention rate IS EL-1000H/EL, and the IS retention rate IS IS-1000H/IS.
TABLE 3 table of physical properties of examples
TABLE 4 physical Properties of comparative examples
As can be seen from the comparison of the data in tables 3 and 4, the comparative example 1 without the chain extender has lower performance retention rate after humid and hot aging compared with the examples, mainly because the PBT has no reconnection of molecular chains in the processing process, has lower molecular weight and lower hydrolytic resistance than the examples; compared with the examples, the comparative example 2 without adding PTFE has lower flexural modulus, because the lubricating effect of PTFE is avoided, the retention length of glass fiber is reduced, and the performance retention rate after the damp-heat aging treatment is lower, which shows the effect of the existence of PTFE on the hydrolysis stability of the system; comparative example 3 increases the content of PTFE, and the addition of too much low molecular weight PTFE adversely affects the performance of the system; comparative example 4 greatly increased the addition of chain extender, also does not help the improvement of hydrolytic resistance. Comparative example 5 employs an epoxy chain extender with a low epoxy equivalent, comparative example 6 employs PBT with a high carboxyl content, and comparative example 7 employs PTFE with a high molecular weight, however, improvement of hydrolysis resistance is not facilitated.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (9)
1. The hydrolysis-resistant reinforced PBT resin is characterized by comprising the following components in parts by weight:
60-80 parts of PBT, 20-40 parts of glass fiber, 0.5-3 parts of anti-hydrolysis agent, 0.2-2 parts of chain extender, 0.5-1.5 parts of nucleating agent, 0.3-1.0 part of antioxidant, 0.1-1.0 part of lubricant and 3-12 parts of polytetrafluoroethylene;
the polytetrafluoroethylene is low molecular weight PTFE, and the weight average molecular weight is 200000-300000.
2. The hydrolysis resistant reinforced PBT resin of claim 1, the PBT is a low end carboxyl group content PBT having a carboxyl end group content of less than 5mol/t.
3. The hydrolysis-resistant reinforced PBT resin of claim 1, wherein the hydrolysis-resistant agent is a polymeric carbodiimide.
4. The reinforced PBT resin against hydrolysis according to claim 1, wherein the chain extender is an epoxy chain extender, and comprises a glycidyl ester chain extender and a glycidyl ether chain extender.
5. The hydrolysis-resistant reinforced PBT resin of claim 4, wherein the epoxy chain extender has an epoxy equivalent weight of from 300 to 600.
6. The hydrolysis-resistant reinforced PBT resin as recited in claim 1, wherein the nucleating agent is an inorganic nucleating agent and is one of talc, calcium carbonate and mica powder.
7. The reinforced PBT resin against hydrolysis according to claim 1, wherein the antioxidant is a combination of antioxidants comprising both hindered phenols and organic sulfur in a weight ratio of 2:1.
8. A process for preparing a hydrolysis resistant reinforced PBT resin according to claim 1, comprising the steps of:
s1, drying PBT for later use;
s2, adding all the components except the glass fiber into a high-speed mixer, and uniformly mixing;
s2, adding the mixed materials in the high-speed mixer into a double-screw extruder, and adding the glass fibers in a side feeding manner; and extruding and granulating to obtain the hydrolysis-resistant reinforced PBT resin.
9. Use of the hydrolysis-resistant reinforced PBT resin according to claim 1 in the preparation of automotive interiors or housings for electronic products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808362.3A CN113667283B (en) | 2021-07-16 | 2021-07-16 | Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808362.3A CN113667283B (en) | 2021-07-16 | 2021-07-16 | Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113667283A CN113667283A (en) | 2021-11-19 |
| CN113667283B true CN113667283B (en) | 2023-04-11 |
Family
ID=78539434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110808362.3A Active CN113667283B (en) | 2021-07-16 | 2021-07-16 | Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113667283B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114426760A (en) * | 2020-10-29 | 2022-05-03 | 南通星辰合成材料有限公司 | Hydrolysis-resistant polyester-based composite material and preparation method thereof |
| CN115028970A (en) * | 2022-06-09 | 2022-09-09 | 湖北合聚新材料有限公司 | PBT material, preparation method thereof and micro-nano laminated co-extrusion device |
| CN115232449B (en) * | 2022-08-08 | 2023-08-25 | 湖北合聚高分子材料有限公司 | Double-85-resistant PBT material and preparation method thereof |
| CN115322531A (en) * | 2022-08-12 | 2022-11-11 | 湖北合聚新材料有限公司 | Hydrolysis-resistant laser welding PBT material and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004307794A (en) * | 2003-02-18 | 2004-11-04 | Mitsubishi Chemicals Corp | Polybutylene terephthalate and its composition |
| CN101463183B (en) * | 2008-11-28 | 2011-07-27 | 上海锦湖日丽塑料有限公司 | Low fog value polyester composition and preparation thereof |
| CN109294177A (en) * | 2018-09-21 | 2019-02-01 | 上海金发科技发展有限公司 | Hydrolysis PBT composition with good fluidity and its preparation method and application |
-
2021
- 2021-07-16 CN CN202110808362.3A patent/CN113667283B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113667283A (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113667283B (en) | Hydrolysis-resistant reinforced PBT resin and preparation method and application thereof | |
| US11591465B2 (en) | Polyester composites and their preparation methods | |
| CN112266619B (en) | Polycarbonate composition resistant to wet heat aging and preparation method thereof | |
| CN112194893B (en) | Hydrolysis-resistant reinforced flame-retardant PA6-POK alloy material and preparation method thereof | |
| CN104592722A (en) | High-luster low-warpage glass fiber reinforced PBT/PP (Polybutylene Terephthalate/Polypropylene) alloy and preparation method thereof | |
| CN106280320B (en) | Low-warpage high-gloss flame-retardant polybutylene terephthalate and preparation method thereof | |
| CN108587154B (en) | Modified PA66 composite material and preparation method thereof | |
| CN112662143B (en) | PBT composition with high elongation at break and preparation method thereof | |
| CN109867918B (en) | Contact antibacterial material with excellent performance and preparation method thereof | |
| CN111004478B (en) | High-performance antistatic polyester material and preparation method thereof | |
| CN114539735B (en) | PBT/POK composite material and application thereof | |
| CN113912992B (en) | Weather-resistant acid rain-resistant ASA/PBT composite material, and preparation method and application thereof | |
| CN112646331B (en) | Polybutylene terephthalate mixture and preparation method thereof | |
| CN111004476B (en) | Engineering plastic composition and preparation method thereof | |
| CN111154240B (en) | Modification method of high-performance and hydrolysis-resistant polybutylene terephthalate resin for optical cable sheath | |
| CN111154257B (en) | Ultralow-water-absorption PA66/PPO composition and preparation method thereof | |
| CN103013080A (en) | Polycarbonate sheet with excellent tear strength and preparation method thereof | |
| CN103834147A (en) | Alkali resistant resin composition and its preparation method | |
| CN112029244B (en) | Heat-resistant hydrolysis-resistant glass fiber reinforced PBT/EVOH composition and preparation method thereof | |
| CN114479389B (en) | Nanofiber modified PBT composite material and preparation method and application thereof | |
| CN115572467B (en) | Polyester composition and preparation method and application thereof | |
| CN114921065B (en) | PBT composite material and preparation method and application thereof | |
| CN115536971B (en) | Heat aging-resistant ASA/PBT composition and preparation method thereof | |
| CN111004477B (en) | High-toughness PBT (polybutylene terephthalate) antibacterial composite material and preparation method thereof | |
| CN112048160A (en) | PBT toughening master batch 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 |