CN112300494B - Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof - Google Patents
Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof Download PDFInfo
- Publication number
- CN112300494B CN112300494B CN202011320143.2A CN202011320143A CN112300494B CN 112300494 B CN112300494 B CN 112300494B CN 202011320143 A CN202011320143 A CN 202011320143A CN 112300494 B CN112300494 B CN 112300494B
- Authority
- CN
- China
- Prior art keywords
- antioxidant
- glass fiber
- composite material
- composite
- master batch
- 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
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
- C08J5/0405—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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
- C08J2451/06—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 homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- 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
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
-
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
-
- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/372—Sulfides, e.g. R-(S)x-R'
-
- 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)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and a preparation method thereof. The composite material obtained by the invention meets the basic technical performance requirements of the water chamber material of the new energy automobile.
Description
Technical Field
The invention belongs to the field of polypropylene composite materials and preparation methods thereof, and particularly relates to an alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and a preparation method thereof.
Background
The traditional radiator water chamber is made of PA66-G30 materials, but with the improvement of the thermal management system technology and the revolutionary change of a power system of a new energy vehicle, the temperature of the whole radiator is obviously reduced compared with the prior art, the test temperature of the traditional high-temperature water chamber reaches 130 ℃, the temperature of the low-temperature water chamber is only about 70-100 ℃, new opportunities are brought to the light weight of the water chamber, and more OEMs consider replacing glass fiber reinforced PA66 with short glass fiber reinforced PP materials. If the polypropylene is popularized in the application of the automobile water chamber, the problem that nylon serving as a water chamber material is easy to cause alcoholysis cracking failure in a high-temperature glycol soaking environment, particularly in a pressure cycle experiment, can be solved, and meanwhile, the cost is reduced.
According to TL-VW744, after water chamber parts are soaked in ethylene glycol at a speed of 135 ℃/48h, the surfaces of products are not changed and do not crack, the requirement is not problematic for glass fiber reinforced polypropylene, some OEMs or Tier1 have higher performance retention rate requirements on PP materials for water chambers, after the water chambers are soaked in the ethylene glycol at a temperature of 1000 h/120 ℃, the retention rate of tensile strength and impact strength of a simply supported beam are not less than 85%, the traditional short glass fiber reinforced polypropylene material can meet the requirement of tensile strength retention rate, but the requirement that the impact strength of the simply supported beam is not more than 85% cannot be met, and the mechanical performance of the material is influenced because the ethylene glycol enters the part where the glass fiber and the polypropylene are combined, the interface of the glass fiber and the polypropylene is damaged, and the degradation of the polypropylene is caused. For nylon materials, the alcoholysis resistance can be improved by treating the surface of glass fibers or adding alcoholysis resistance aids such as polyamine stabilizers hexamethyl phosphoric triamide, polycarbodiimide and the like to protect the body of nylon resin. The composite antioxidant polypropylene fiber composite material aims at polypropylene, and the ethylene glycol resistance of the polypropylene fiber composite material is optimized by adding the composite antioxidant to protect the interface of the polypropylene and the glass fiber.
CN 111647226A discloses a water-immersion-resistant weather-resistant halogen-free flame-retardant polypropylene material, a preparation method and an application thereof, which only solves the problem of improving the distilled water resistance and does not mention the performance of glycol solution resistance.
Disclosure of Invention
The invention aims to solve the technical problem of providing an alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and a preparation method thereof, and overcoming the defect that the performance retention rate is reduced after ethylene glycol solution is soaked in the prior art.
The invention relates to a glass fiber reinforced polypropylene composite material, which comprises the following raw materials in parts by weight:
the composite antioxidant comprises a composite antioxidant master batch A containing hindered phenol and semi-hindered phenol, and a composite antioxidant master batch B consisting of an antioxidant containing neutral hindered amine and a thioether antioxidant.
Further, the raw material components comprise the following components in parts by weight:
the polypropylene resin is homopolymerized polypropylene, and the melt Mass Flow Rate (MFR) of the polypropylene resin is 3-30 g/10min at 230 ℃ under the load of 2.16 Kg.
The glass fiber is alkali-free chopped glass fiber.
The length of the glass fiber is 3.0-9.0mm, and the diameter is 7-17 μm.
The maleic anhydride graft is maleic anhydride graft polypropylene, the mass grafting ratio of the maleic anhydride is 0.7-1.3%, and the melt Mass Flow Rate (MFR) at 190 ℃ and 2.16kg is 70-140 g/10min.
The pigment is carbon black master batch.
The composite antioxidant containing hindered phenol and semi-hindered phenol is MAO-51P; the compound antioxidant composed of the antioxidant containing neutral hindered amine and the thioether antioxidant is NAO-425P.
The MAO-51P in the composite antioxidant, the main antioxidant, is a composite antioxidant master batch consisting of hindered phenol and semi-hindered phenol. The base material is PP, and the effective mass percentage content is 80%.
The composite antioxidant is NAO-425P, the auxiliary antioxidant is a composite antioxidant master batch consisting of a neutral hindered amine antioxidant and a thioether antioxidant, the base material is PP, and the effective mass percentage content is 80%.
In the composite antioxidant, the mass ratio of a composite antioxidant master batch A containing hindered phenol and semi-hindered phenol to a composite antioxidant master batch B consisting of an antioxidant containing neutral hindered amine and a thioether antioxidant is 3-7.
The invention relates to a preparation method of a glass fiber reinforced polypropylene composite material, which comprises the following steps:
premixing the polypropylene, the maleic anhydride graft, the pigment and the antioxidant uniformly, putting the mixture into a double-screw extruder from a main feeding port, putting the glass fiber into the extruder from a side feeding port, and granulating after melt extrusion to obtain the chopped glass fiber reinforced polypropylene composite material.
The parameters of the melting double-screw extrusion process are set as follows: the temperature of a first zone of the main engine is 100-120 ℃, the temperature of a second zone is 180-200 ℃, the temperature of a third zone is 200-220 ℃, the temperature of a fourth zone is 200-220 ℃, the temperature of a fifth zone is 200-220 ℃, the temperature of a sixth zone is 180-200 ℃, the temperature of a seventh zone is 180-200 ℃, the temperature of an eighth zone is 180-200 ℃, the temperature of a ninth zone is 180-200 ℃, the temperature of a tenth zone is 180-200 ℃, and the rotation speed of the main engine is 200-350 rpm.
The invention discloses application of a glass fiber reinforced polypropylene composite material in a water chamber material of a new energy automobile.
Advantageous effects
The MAO-51P composite antioxidant adopted by the invention contains hindered phenol and semi-hindered phenol antioxidant components, and mainly plays a role in capturing free radicals. Compared with semi-hindered phenol, the hindered phenol has better long-lasting effect but insufficient activity; the efficiency of the semi-hindered phenol for capturing free radicals is higher, the hindered phenol is well supplemented, and particularly in a high-temperature ethylene glycol-resistant environment, the interface of polypropylene and glass fiber can be better protected. And the NAO-425P contains neutral high molecular weight hindered amine antioxidant and thioether antioxidant, and mainly plays a role in stopping free radicals. The thioether has higher activity at higher temperature, the high molecular weight hindered amine has better activity at lower temperature, and the combination of the thioether and the high molecular weight hindered amine can play a role in protecting the material in a wider range. In addition, thioether is a slightly acidic antioxidant, hindered amine is a slightly basic antioxidant generally, the compound antioxidant adopts a neutral hindered amine antioxidant, the problem that the efficiency is influenced by the possibility of reaction of the thioether and the hindered amine is solved, and the antioxidant with high molecular weight also has the advantage of precipitation resistance. The combination of the two composite antioxidants can well protect the interface of polypropylene and glass fiber, so that the high-temperature resistant glycol performance of the material has very good mechanical performance retention rate.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
(1) EXAMPLES starting materials
Polypropylene resin: homo-polypropylene, produced by HP500N Zhonghai brand, has a melt index of 10g/10min at 230 ℃ under a load of 2.16Kg (ISO 1133).
Glass fiber: a product of type T538D manufactured by Taishan glass fiber Co., ltd is selected, the length is 4.5mm, and the average diameter is 13 μm.
Maleic anhydride graft: SCONA TPPP 9212 FA, produced by BYK, had a mass graft ratio of 1.0% and a melt mass flow rate (190 ℃,2.16 kg) of 80g/10min.
Pigment: PE carrier carbon black master batch, produced by PE 2772 American Kabauer, with a carbon black content of 45%.
Compounding an antioxidant A: MAO-51P is produced by composite antioxidant master batch of hindered phenol and semi-hindered phenol, the base material is PP, and the effective mass percentage content is 80 percent.
Compounding an antioxidant B: NAO-425P, a neutral hindered amine antioxidant and a thioether antioxidant, wherein the base material is PP, the effective mass percentage content is 80%, and the preparation method is produced by Jiangsu Wannapu.
(2) Performance test method
Tensile property: the drawing speed was 10mm/min according to ISO 527.
Impact performance of the simply supported beam notch: 4mm thick specimens according to ISO 179.
The tensile property retention rate of the cooling liquid is as follows:
experimental medium: 50/50 coolant/water (keep the highest liquid level, the bars are completely immersed in the coolant);
the temperature of the experimental medium is 120 ℃, and the experimental period is 1000 hours.
The experimental conditions of the notch impact retention rate of the coolant-resistant simply supported beam are as follows:
experimental medium: 50/50 cooling liquid/water (the highest liquid level was maintained, the bars were completely immersed in the cooling liquid);
the temperature of the experimental medium is 120 ℃, and the experimental period is 1000 hours.
Examples 1 to 6
The raw material components and the parts by weight are detailed in table 1. The preparation method comprises the following steps: a double-screw extruder with a lateral feeding port (length-diameter ratio L/D = 40) is used, and the polypropylene resin, the graft compatilizer, the pigment and the antioxidant are uniformly mixed and then added from a main feeding port. The chopped glass fiber is added into the feed inlet at a side feeding port, wherein the addition amount of the chopped glass fiber is 30 percent. The processing temperatures (from the feed port to the die) were: the rotation speed of a main engine at 100 ℃,180 ℃,180 ℃,200 ℃,200 ℃,200 ℃,200 ℃,200 ℃,200 ℃ and 200 ℃ is 300rpm, and finally, the standard sample strip is prepared by using an injection molding machine.
Comparative examples 1 to 6
The raw material components and the parts by weight are detailed in table 1, and the preparation method is the same as the above examples.
Table 1 is a table of parts by weight of examples and comparative examples:
TABLE 2 Performance tables for examples and comparative examples
From the test results in table 2, it can be derived: from comparative example 4, for the traditional antioxidant formula system, no matter how much antioxidant is added, the notch impact retention of the coolant-resistant simple beam of the material cannot be improved, and the requirement of more than or equal to 85 percent cannot be met. And from the comparison of the embodiment 1-6 and the comparative example 1-6, the notch impact retention rate of the cooling liquid resistant simply supported beam of the material added with the composite antioxidants A and B is obviously improved, and the requirement of more than or equal to 85 percent can be met. In contrast, the comparison between comparative example 5, comparative example 6 and example 1 shows that the composite antioxidant A and the composite antioxidant B have obvious synergistic effect.
Claims (8)
1. The glass fiber reinforced polypropylene composite material is characterized by comprising the following raw materials in parts by weight:
the composite antioxidant comprises a composite antioxidant master batch A containing hindered phenol and semi-hindered phenol, and a composite antioxidant master batch B consisting of an antioxidant containing neutral hindered amine and a thioether antioxidant; wherein the compound antioxidant master batch A is MAO-51P; the compound antioxidant master batch B is NAO-425P; the mass ratio of the composite antioxidant master batch A to the composite antioxidant master batch B is 3-7.
2. The composite material of claim 1, wherein the raw material components comprise, in parts by weight:
3. the composite material of claim 1, wherein the polypropylene resin is homopolypropylene having a melt mass flow rate of 3 to 30g/10min at 230 ℃ under a load of 2.16 Kg.
4. The composite material of claim 1, wherein the glass fibers are alkali-free chopped glass fibers.
5. The composite material according to claim 1, wherein the glass fibers have a length of 3.0 to 9.0mm and a diameter of 7 to 17 μm.
6. The composite material of claim 1, wherein the maleic anhydride graft is maleic anhydride grafted polypropylene having a mass graft ratio of 0.7 to 1.3% and a melt mass flow rate of 70 to 140g/10min at 190 ℃ under 2.16 kg; the pigment is carbon black master batch.
7. A preparation method of a glass fiber reinforced polypropylene composite material comprises the following steps:
according to the proportion of claim 1, polypropylene, maleic anhydride graft, pigment and antioxidant are uniformly premixed, and are put into a double-screw extruder from a main feeding port, glass fiber is put into the extruder from a side feeding port, and the mixture is subjected to melt extrusion and then is granulated, so that the chopped glass fiber reinforced polypropylene composite material is obtained.
8. The application of the glass fiber reinforced polypropylene composite material as defined in claim 1 in a water chamber material of a new energy automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011320143.2A CN112300494B (en) | 2020-11-23 | 2020-11-23 | Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011320143.2A CN112300494B (en) | 2020-11-23 | 2020-11-23 | Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112300494A CN112300494A (en) | 2021-02-02 |
| CN112300494B true CN112300494B (en) | 2022-11-18 |
Family
ID=74336114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011320143.2A Active CN112300494B (en) | 2020-11-23 | 2020-11-23 | Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112300494B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806153B (en) * | 2022-03-25 | 2023-07-11 | 江苏金发科技新材料有限公司 | Nylon 6/polypropylene composite material and preparation method and application thereof |
| CN114773727B (en) * | 2022-04-13 | 2023-12-22 | 金发科技(印度)有限公司 | Polypropylene composite material and preparation method and application thereof |
| CN114806011B (en) * | 2022-04-15 | 2023-09-22 | 威高集团有限公司 | Propylene polymer composition and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589074A (en) * | 2012-08-13 | 2014-02-19 | 合肥杰事杰新材料股份有限公司 | Filling polypropylene material with high heat-proof aging performance and preparation method thereof |
| CN104744778A (en) * | 2013-12-30 | 2015-07-01 | 青岛万力科技有限公司 | Polyethylene flame retardant masterbatch and preparation method thereof |
| JP2017193646A (en) * | 2016-04-21 | 2017-10-26 | 株式会社Adeka | Thermoplastic resin composition and molded body using the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044764A (en) * | 2011-10-14 | 2013-04-17 | 合肥杰事杰新材料股份有限公司 | High-toughness long-glass-fiber reinforced polypropylene composite material and method for preparing same |
| CN103342858B (en) * | 2013-06-29 | 2016-05-18 | 金发科技股份有限公司 | A kind of short glass fiber reinforced polypropylene compound material and its preparation method and application |
| CN105482242A (en) * | 2015-12-30 | 2016-04-13 | 上海普利特复合材料股份有限公司 | High-strength and high-toughness long glass fiber reinforced polypropylene composite material and preparation method thereof |
| US11931973B2 (en) * | 2018-03-02 | 2024-03-19 | Ticona Llc | Weatherable fiber-reinforced propylene composition |
| CN110144085A (en) * | 2019-06-19 | 2019-08-20 | 江苏金发科技新材料有限公司 | A kind of high endurance glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN110922678A (en) * | 2019-12-13 | 2020-03-27 | 天津金发新材料有限公司 | Low-odor heat-aging-resistant glass fiber reinforced polypropylene material and preparation method thereof |
-
2020
- 2020-11-23 CN CN202011320143.2A patent/CN112300494B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589074A (en) * | 2012-08-13 | 2014-02-19 | 合肥杰事杰新材料股份有限公司 | Filling polypropylene material with high heat-proof aging performance and preparation method thereof |
| CN104744778A (en) * | 2013-12-30 | 2015-07-01 | 青岛万力科技有限公司 | Polyethylene flame retardant masterbatch and preparation method thereof |
| JP2017193646A (en) * | 2016-04-21 | 2017-10-26 | 株式会社Adeka | Thermoplastic resin composition and molded body using the same |
Non-Patent Citations (1)
| Title |
|---|
| 抗氧剂在塑料中的应用;马玫等;《合成材料老化与应用》;20110630;第40卷(第03期);第41-47页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112300494A (en) | 2021-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112300494B (en) | Alcoholysis-resistant chopped glass fiber reinforced polypropylene polymer and preparation method thereof | |
| CN101792596A (en) | Composite material for recycling waste vehicle nylon products and preparation method thereof | |
| CN112724391A (en) | Application of chain extender in improving viscosity of polyester compound, modified polyester compound and preparation method thereof | |
| CN110845792A (en) | Polypropylene composition for automobile water chamber and preparation method thereof | |
| CN112143103A (en) | Cage-type silsesquioxane modified polypropylene composite material and preparation method thereof | |
| CN103772921A (en) | Glass fiber reinforced poly(ethylene terephthalate)/polycarbonate alloy | |
| CN113480850A (en) | High-flame-retardant PPS polyphenylene sulfide modified polymer and preparation process thereof | |
| CN112795183A (en) | High-strength, low-shrinkage and low-precipitation environment-friendly flame-retardant polyamide composition and preparation method thereof | |
| CN111621123A (en) | Low-warpage PET/PBT composite material and preparation method thereof | |
| CN112375297A (en) | Glass fiber reinforced PP/PA66 composite material for water chamber of new energy automobile and preparation method thereof | |
| CN112322020B (en) | Polyphenyl ether resin composition and preparation method thereof, and wire slot and preparation method thereof | |
| CN111117233B (en) | Polyamide 56 composition resistant to corrosion of automobile coolant and preparation method and application thereof | |
| CN112852133A (en) | Anti-droplet PLA/PVA composite material and preparation method thereof | |
| CN114773727A (en) | Polypropylene composite material and preparation method and application thereof | |
| CN110951246B (en) | Resin composition, resin and preparation method thereof, metal resin complex and preparation method thereof, and electronic product shell | |
| CN109206899B (en) | Multi-effect composite resin additive and composite material | |
| CN107540938B (en) | Modified polypropylene reclaimed material and preparation method thereof | |
| CN114773728B (en) | Polypropylene composition and preparation method and application thereof | |
| CN116218208B (en) | PA/PP alloy material and preparation method and application thereof | |
| CN115785627B (en) | Hydrolysis-resistant polyester resin composite material and preparation method and application thereof | |
| CN112708236B (en) | Flame-retardant composition for thin-wall friction welding and preparation method thereof | |
| CN116162346A (en) | Continuous production method for nylon 6 melt modification | |
| CN111592755B (en) | Enhanced bio-based polyamide 56 composition and preparation method thereof | |
| CN115109394B (en) | High weld mark strength liquid crystal polymer composite material and preparation method thereof | |
| CN114591608B (en) | Glass fiber reinforced PET composition easy to release and preparation method and application 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 |