CN112898727A - Preparation method of oil-resistant heat-resistant dimensionally stable phenolic molding compound - Google Patents
Preparation method of oil-resistant heat-resistant dimensionally stable phenolic molding compound Download PDFInfo
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- CN112898727A CN112898727A CN202110184889.3A CN202110184889A CN112898727A CN 112898727 A CN112898727 A CN 112898727A CN 202110184889 A CN202110184889 A CN 202110184889A CN 112898727 A CN112898727 A CN 112898727A
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000465 moulding Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 150000001875 compounds Chemical class 0.000 title claims description 19
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 27
- 239000005011 phenolic resin Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000011256 inorganic filler Substances 0.000 claims abstract description 10
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 10
- 239000000806 elastomer Substances 0.000 claims abstract description 9
- 239000005060 rubber Substances 0.000 claims abstract description 9
- 238000004898 kneading Methods 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 22
- 229920001169 thermoplastic Polymers 0.000 claims description 18
- 239000004416 thermosoftening plastic Substances 0.000 claims description 18
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical group C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 12
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 11
- 229920003986 novolac Polymers 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000005995 Aluminium silicate Substances 0.000 claims description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims description 8
- 235000012211 aluminium silicate Nutrition 0.000 claims description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 8
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 6
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 229910052882 wollastonite Inorganic materials 0.000 claims description 6
- 239000010456 wollastonite Substances 0.000 claims description 6
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 239000006082 mold release agent Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 17
- 239000004033 plastic Substances 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 239000000395 magnesium oxide Substances 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 229960004011 methenamine Drugs 0.000 description 5
- 238000007171 acid catalysis Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 239000000206 moulding compound Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A preparation method of oil-resistant heat-resistant stable-size phenolic molding plastic comprises the following steps: weighing raw materials, 10-20 parts of phenolic resin, 0-3 parts of curing agent, 5-15 parts of inorganic reinforced fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of high-efficiency release agent and 40-60 parts of inorganic filler; putting the obtained phenolic resin into a crusher for crushing to obtain powdery matrix material; introducing 0-3 parts of the obtained curing agent, 5-15 parts of inorganic reinforcing fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of high-efficiency release agent and 40-60 parts of inorganic filler into a kneader for kneading; introducing the obtained mixture into a plasticator for plastication; and introducing the obtained flaky material to be granulated into a grinder for grinding, and screening to obtain a finished product. The advantages are that: the steps are concise; the heat resistance and oil resistance of the finished product are improved; the material has high dimensional stability.
Description
Technical Field
The invention belongs to the technical field of thermosetting molding compound preparation, and particularly relates to a preparation method of an oil-resistant heat-resistant phenolic molding compound with stable size.
Background
The phenolic moulding plastic is processed by taking thermoplastic phenolic resin or thermosetting phenolic resin as a matrix and adding organic and inorganic fillers and other accessory ingredients. Phenolic resin and molding compound thereof are the earliest varieties of industrial production in synthetic resin and plastics, and have been used for over 100 years. Based on the wide raw material sources, simple production process and equipment, good molding processability and low price, the flame-retardant plastic can obtain excellent heat resistance, mechanical property, electrical property, thermal property, ablation property, chemical property and radiation resistance by various means, especially has good flame retardant property and low smoke rate, generates little harmful gas, and becomes an indispensable material for mechanical, electronic and electrical, building, mining, national defense and other industrial departments.
Because the automotive field requires light weight of materials, high-molecular materials are required to replace metal materials with higher weight, and the processing cost of parts can be greatly reduced due to the easy processing characteristic of the high-molecular materials.
Chinese patent application publication No. CN109912926A discloses phenolic molding compound for manufacturing automobile parts such as automobile window motor frame, brake booster and brush handle of electric motor. The material has high mechanical strength, heat resistance, chemical resistance and dimensional stability. The patent comprises the following raw materials in percentage by mass: 20-35% of phenolic resin, 40-60% of inorganic base material, 8-12% of filler, 2-5% of curing agent, 0.1-0.2% of release agent, 0.5-1.0% of colorant, 0.2-0.3% of surfactant and 0.3-0.5% of toughening agent.
As known in the industry, compared with the aforementioned automobile part products, the requirement of the material for the dimensional stability of the automobile oil pump slip ring material is more severe when phenolic molding compound is used, otherwise the radial dimensional accuracy of the part cannot be expected. Also, if the heat and oil resistance of the material is insufficient, dimensional deformation is excessive in the high-temperature engine oil, causing deformation of parts and resulting failure.
Therefore, the method has positive significance for exploring the preparation method of the phenolic molding compound which can still show excellent dimensional stability and meet the high-precision requirement of the radial dimension of the part when being used in high-temperature engine oil for a long time.
Disclosure of Invention
The invention aims to provide a preparation method of an oil-resistant heat-resistant dimensionally stable phenolic moulding compound, and the oil-resistant heat-resistant dimensionally stable phenolic moulding compound prepared by the method is beneficial to meeting the requirement that the oil-resistant heat-resistant dimensionally stable phenolic moulding compound can still show excellent dimensional stability after being used in high-temperature engine oil for a long time and can fully ensure the requirement of high precision.
The task of the invention is completed by the following steps:
A) preparing raw materials, weighing the following raw materials in parts by weight: 10-20 parts of phenolic resin, 0-3 parts of curing agent, 5-15 parts of inorganic reinforcing fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of efficient release agent and 40-60 parts of inorganic filler to obtain raw materials, wherein the phenolic resin in the step is acid-catalyzed thermoplastic novolac resin or a mixture of thermoplastic novolac resin and thermosetting novolac resin, and the weight-average molecular weight of the thermoplastic novolac resin is more than 20000;
B) preparing a matrix material, namely putting the phenolic resin obtained in the step A) into a crusher to be crushed to obtain a powdery matrix material;
C) preparing a mixture, namely introducing 0-3 parts of curing agent obtained in the step A), 5-15 parts of inorganic reinforced fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of high-efficiency release agent and 40-60 parts of inorganic filler into a kneader along with the powdery matrix material obtained in the step B) for kneading to obtain a mixture;
D) plasticating, namely introducing the mixture obtained in the step C) into a plasticating machine for plasticating, controlling the plasticating temperature to be 100-;
E) and D) granulating, namely introducing the flaky material to be granulated obtained in the step D) into a crusher for crushing, and screening to obtain the oil-resistant heat-resistant phenolic molding compound with stable size.
In a specific embodiment of the present invention, the curing agent is hexamethylenetetramine.
In another specific embodiment of the present invention, the inorganic reinforcing fibers are alkali-free glass fibers.
In another specific embodiment of the present invention, the rubber elastomer is nitrile rubber powder and/or styrene butadiene rubber powder.
In yet another embodiment of the present invention, the curing accelerator is activated magnesium oxide and/or calcium hydroxide.
In still another specific embodiment of the present invention, the high-efficiency mold release agent is one or more of zinc stearate, OP wax, Ethylene Bis Stearamide (EBS) and stearic acid.
In a more specific embodiment of the present invention, the inorganic filler is one or a combination of glass micro-bead powder, acicular wollastonite powder or kaolin.
The technical scheme provided by the invention has the following advantages that: the preparation method has simple process steps, and meets the requirement of industrial scale-up production without harsh process elements; because the thermoplastic phenolic novolac resin or the combination of the thermoplastic phenolic novolac resin and the thermosetting phenolic resin is used in the raw materials, and the weight average molecular weight of the thermoplastic phenolic novolac resin is more than 20000, the heat resistance and oil resistance of the obtained phenolic molding compound are obviously improved; the inorganic reinforced fiber is added into the raw materials to keep the mechanical strength of the material, and the rubber elastomer and a large amount of inorganic filler are added, so that the heat resistance and the oil resistance of the phenolic molding compound are greatly improved, and the material has high dimensional stability.
Detailed Description
Example 1:
A) preparing raw materials, weighing the following raw materials in parts by weight: 12 parts of thermoplastic linear phenolic resin with acid catalysis and weight-average molecular weight larger than 20000, 5 parts of acid-catalyzed thermosetting phenolic resin, 10 parts of alkali-free glass fiber, 1.5 parts of nitrile-butadiene rubber powder, 1.5 parts of styrene-butadiene rubber powder, 1 part of active magnesium oxide, 1 part of calcium hydroxide, 1 part of zinc stearate, 20 parts of glass beads and 40 parts of kaolin to obtain raw materials;
B) preparing a matrix material, and putting 12 parts of the thermoplastic linear phenolic resin obtained in the step A) and 5 parts of thermosetting phenolic resin into a pulverizer for pulverization to obtain a powdery matrix material;
C) preparing a mixture, namely introducing 10 parts of the alkali-free glass fiber obtained in the step A), 1.5 parts of nitrile rubber powder, 1.5 parts of styrene-butadiene rubber powder, 1 part of active magnesium oxide, 1 part of calcium hydroxide, 1 part of zinc stearate, 20 parts of glass beads and 40 parts of kaolin into a kneader along with the powdery matrix material obtained in the step B) for kneading to obtain a mixture;
D) plasticating, namely introducing the mixture obtained in the step C) into a plasticating machine for plasticating at the plasticating temperature of 100 ℃ and 110 ℃ for 3-4min, and then cooling to room temperature to obtain a flaky material to be granulated;
E) and D) granulating, namely introducing the flaky material to be granulated obtained in the step D) into a crusher for crushing, and screening to obtain the oil-resistant heat-resistant phenolic molding compound with stable size.
Example 2:
A) preparing raw materials, weighing the following raw materials in parts by weight: 15 parts of thermoplastic linear phenolic resin which is acid-catalyzed and has the weight-average molecular weight of more than 20000, 3 parts of hexamethylenetetramine, 5 parts of alkali-free glass fiber, 2 parts of nitrile rubber powder, 1 part of active magnesium oxide, 1 part of Ethylene Bis Stearamide (EBS), 1 part of stearic acid and 40 parts of needle-shaped wollastonite powder to obtain a raw material;
B) preparing a matrix material, namely putting 15 parts of the thermoplastic linear phenolic resin obtained in the step A) into a crusher to be crushed to obtain a powdery matrix material;
C) preparing a mixture, introducing 3 parts of hexamethylene tetramine, 5 parts of alkali-free glass fiber, 2 parts of nitrile rubber powder, 1 part of active magnesium oxide, 1 part of Ethylene Bis Stearamide (EBS), 1 part of stearic acid and 40 parts of needle-like wollastonite powder obtained in the step A) into a kneader along with the powdery matrix material obtained in the step B) for kneading to obtain a mixture, and sequentially carrying out the step D) and the step E) which are the same as the step 1 to obtain the oil-resistant and heat-resistant phenolic molding compound with stable size.
Example 3:
A) preparing raw materials, weighing the following raw materials in parts by weight: 15 parts of thermoplastic linear phenolic resin with acid catalysis and weight-average molecular weight larger than 20000, 5 parts of acid-catalyzed thermosetting phenolic resin, 8 parts of alkali-free glass fiber, 1 part of styrene-butadiene rubber powder, 1.5 parts of calcium hydroxide, 0.5 part of OP wax, 1 part of zinc stearate, 0.5 part of stearic acid, 10 parts of glass beads, 30 parts of needle-shaped wollastonite powder and 10 parts of kaolin to obtain raw materials;
B) preparing a matrix material, namely putting 15 parts of the thermoplastic linear phenolic resin obtained in the step A) and 5 parts of thermosetting phenolic resin into a crusher for crushing to obtain a powdery matrix material;
C) preparing a mixture, introducing 8 parts of the alkali-free glass fiber obtained in the step A), 1 part of styrene-butadiene rubber powder, 1.5 parts of calcium hydroxide, 0.5 part of OP wax, 1 part of zinc stearate, 0.5 part of stearic acid, 10 parts of glass beads, 30 parts of needle-like wollastonite powder and 10 parts of kaolin into a kneader along with the powdery matrix material obtained in the step B) for kneading to obtain a mixture, and sequentially performing the step D) and the step E) which are the same as the step 1 to obtain the oil-resistant and heat-resistant phenolic molding compound with stable size.
Example 4:
A) preparing raw materials, weighing the following raw materials in parts by weight: 8 parts of thermoplastic linear phenolic resin with acid catalysis and weight-average molecular weight larger than 20000, 2 parts of acid-catalyzed thermosetting phenolic resin, 2 parts of hexamethylenetetramine, 15 parts of alkali-free glass fiber, 4 parts of nitrile rubber powder, 0.5 part of active magnesium oxide, 2 parts of Ethylene Bis Stearamide (EBS), 1 part of OP wax and 55 parts of kaolin to obtain a raw material;
B) preparing a matrix material, namely putting 8 parts of the thermoplastic linear phenolic resin obtained in the step A) and 2 parts of thermosetting phenolic resin into a crusher for crushing to obtain a powdery matrix material;
C) preparing a mixture, introducing 2 parts of hexamethylenetetramine, 15 parts of alkali-free glass fiber, 4 parts of nitrile rubber powder, 0.5 part of active magnesium oxide, 2 parts of Ethylene Bis Stearamide (EBS), 1 part of OP wax and 55 parts of kaolin, which are obtained in the step A), into a kneader together with the powdery matrix material obtained in the step B) for kneading to obtain a mixture, and then sequentially carrying out the steps D) and E) which are the same as the step 1 to obtain the oil-resistant and heat-resistant phenolic molding compound with stable size.
The oil and heat resistant dimensionally stable phenolic molding materials prepared from examples 1-4 above were tested to have the specifications shown in the following table.
| Test items | Example 1 | Example 2 | Example 3 | Example 4 |
| Relative density g/cm3 | 1.9-2.0 | 1.9-2.0 | 1.9-2.0 | 1.9-2.0 |
| Volume factor | 1.5-2.5 | 1.5-2.5 | 1.5-2.5 | 1.5-2.5 |
| Molding shrinkage ratio% | ≤0.03 | ≤0.03 | ≤0.03 | ≤0.03 |
| Bending strength MPa | 115 | 110 | 103 | 112 |
| Impact strength (gap) kJ/m of simply supported beam2 | 2.3 | 2.2 | 2.4 | 2.3 |
| Heat distortion temperature (1.8MPa) deg.C | 290 | 286 | 292 | 288 |
| Water absorption mg | 2 | 3 | 2 | 2 |
Claims (7)
1. A preparation method of oil-resistant heat-resistant dimensionally stable phenolic molding compound is characterized by comprising the following steps:
A) preparing raw materials, weighing the following raw materials in parts by weight: 10-20 parts of phenolic resin, 0-3 parts of curing agent, 5-15 parts of inorganic reinforcing fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of efficient release agent and 40-60 parts of inorganic filler to obtain raw materials, wherein the phenolic resin in the step is acid-catalyzed thermoplastic novolac resin or a mixture of thermoplastic novolac resin and thermosetting novolac resin, and the weight-average molecular weight of the thermoplastic novolac resin is more than 20000;
B) preparing a matrix material, namely putting the phenolic resin obtained in the step A) into a crusher to be crushed to obtain a powdery matrix material;
C) preparing a mixture, namely introducing 0-3 parts of curing agent obtained in the step A), 5-15 parts of inorganic reinforced fiber, 1-4 parts of rubber elastomer, 0.5-2 parts of curing accelerator, 1-3 parts of high-efficiency release agent and 40-60 parts of inorganic filler into a kneader along with the powdery matrix material obtained in the step B) for kneading to obtain a mixture;
D) plasticating, namely introducing the mixture obtained in the step C) into a plasticating machine for plasticating, controlling the plasticating temperature to be 100-;
E) and D) granulating, namely introducing the flaky material to be granulated obtained in the step D) into a crusher for crushing, and screening to obtain the oil-resistant heat-resistant phenolic molding compound with stable size.
2. The method of claim 1, wherein the curing agent is hexamethylenetetramine.
3. The method of claim 1 wherein the inorganic reinforcing fibers are alkali-free glass fibers.
4. The method for preparing the oil-resistant heat-resistant dimensionally stable phenolic molding compound as claimed in claim 1, characterized in that the rubber elastomer is nitrile rubber powder and/or styrene butadiene rubber powder.
5. The method of claim 1, wherein the curing accelerator is activated magnesium oxide and/or calcium hydroxide.
6. The method of claim 1, wherein the high performance mold release agent is one or more of zinc stearate, OP wax, ethylene bis stearamide and stearic acid.
7. The method for preparing the oil-resistant heat-resistant dimensionally stable phenolic molding compound as claimed in claim 1, wherein the inorganic filler is one or more of glass bead powder, acicular wollastonite powder or kaolin.
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| CN202110184889.3A CN112898727A (en) | 2021-02-10 | 2021-02-10 | Preparation method of oil-resistant heat-resistant dimensionally stable phenolic molding compound |
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| CN202110184889.3A CN112898727A (en) | 2021-02-10 | 2021-02-10 | Preparation method of oil-resistant heat-resistant dimensionally stable phenolic molding compound |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045966A (en) * | 2014-06-10 | 2014-09-17 | 常熟东南塑料有限公司 | Phenolic molding plastic for electric baking pan housing and preparation method of phenolic molding plastic |
| CN106589800A (en) * | 2016-12-23 | 2017-04-26 | 昌吉学院 | Method for enhancing toughness of phenolic resin foam board by using reclaimed PET (polyethylene terephthalate) material |
| CN107353584A (en) * | 2017-07-26 | 2017-11-17 | 常熟东南塑料有限公司 | A kind of anti-mildew becomes phenolaldehyde moulding compound and preparation method thereof |
-
2021
- 2021-02-10 CN CN202110184889.3A patent/CN112898727A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045966A (en) * | 2014-06-10 | 2014-09-17 | 常熟东南塑料有限公司 | Phenolic molding plastic for electric baking pan housing and preparation method of phenolic molding plastic |
| CN106589800A (en) * | 2016-12-23 | 2017-04-26 | 昌吉学院 | Method for enhancing toughness of phenolic resin foam board by using reclaimed PET (polyethylene terephthalate) material |
| CN107353584A (en) * | 2017-07-26 | 2017-11-17 | 常熟东南塑料有限公司 | A kind of anti-mildew becomes phenolaldehyde moulding compound and preparation method thereof |
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