CN111423549A - Boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and preparation method thereof - Google Patents
Boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and preparation method thereof Download PDFInfo
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- CN111423549A CN111423549A CN202010443442.9A CN202010443442A CN111423549A CN 111423549 A CN111423549 A CN 111423549A CN 202010443442 A CN202010443442 A CN 202010443442A CN 111423549 A CN111423549 A CN 111423549A
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- Prior art keywords
- resin
- organic silicon
- cashew nut
- nut shell
- shell oil
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229920001568 phenolic resin Polymers 0.000 title claims abstract description 43
- 239000005011 phenolic resin Substances 0.000 title claims abstract description 43
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 43
- 239000010703 silicon Substances 0.000 title claims abstract description 43
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 34
- 244000226021 Anacardium occidentale Species 0.000 title claims abstract description 29
- 235000020226 cashew nut Nutrition 0.000 title claims abstract description 29
- 239000003921 oil Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 52
- 239000011347 resin Substances 0.000 claims abstract description 52
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 17
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 17
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004327 boric acid Substances 0.000 claims abstract description 11
- JOLVYUIAMRUBRK-UHFFFAOYSA-N 11',12',14',15'-Tetradehydro(Z,Z-)-3-(8-Pentadecenyl)phenol Natural products OC1=CC=CC(CCCCCCCC=CCC=CCC=C)=C1 JOLVYUIAMRUBRK-UHFFFAOYSA-N 0.000 claims abstract description 9
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- JOLVYUIAMRUBRK-UTOQUPLUSA-N Cardanol Chemical compound OC1=CC=CC(CCCCCCC\C=C/C\C=C/CC=C)=C1 JOLVYUIAMRUBRK-UTOQUPLUSA-N 0.000 claims abstract description 9
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 claims abstract description 9
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 239000000376 reactant Substances 0.000 claims description 18
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 12
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 8
- 229920002050 silicone resin Polymers 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 150000001638 boron Chemical class 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 150000002989 phenols Chemical class 0.000 abstract description 3
- 238000003763 carbonization Methods 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 238000010992 reflux Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/28—Chemically modified polycondensates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention belongs to the field of phenolic resin. The invention provides a boron phenolic resin compositely modified by cashew nut shell oil and organic silicon, which is prepared from the following components in parts by weight: 90-110 parts of phenol, 40-55 parts of paraformaldehyde, 20-30 parts of boric acid, 10-20 parts of cashew nut shell oil, 5-15 parts of organic silicon and 1.5-3 parts of a catalyst. The invention also provides a preparation method of the boron phenolic resin compositely modified by the cashew nut shell oil and the organic silicon. The cashew nut shell oil contains cardanol and other phenolic compounds, so that on one hand, the cashew nut shell oil can replace phenol and formaldehyde to react, and the resin cost is reduced; on the other hand, due to the continuity of the unsaturated side carbon chain, the toughness of the resin is improved; the organic silicon resin has special hydrophobicity, and can reduce the water absorption of the resin; meanwhile, the organic silicon resin has the advantage of no carbonization during decomposition, and can stabilize and improve the electrical property of a resin system.
Description
Technical Field
The invention relates to the technical field of phenolic resin, in particular to boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and a preparation method thereof.
Background
Compared with the common phenolic resin, the boron phenolic resin has better performances of high temperature resistance, ablation resistance, neutron ray resistance and the like than the common phenolic resin, is generally accepted at present, and has also been applied to special fields of aerospace, military industry and the like. However, the resin has the defects of poor toughness and easy moisture absorption, and the use units in the special fields can achieve the use purpose only through later-stage complex modification. For the reasons of complicated modification procedure, high cost and the like in the common civil field, the use units often have the contradiction that the use is not known and the cost is increased, so that the embarrassing situation of the boron phenolic resin market is caused.
Disclosure of Invention
The invention aims to provide a boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and a preparation method thereof, aiming at the defects of poor toughness and easy moisture absorption of the boron phenolic resin. The invention introduces flexible groups and hydrophobic groups into the system while preparing the boron phenolic resin, solves the problems of poor toughness, easy moisture absorption, non-ideal electrical property and the like of the boron phenolic resin, improves the defects of the boron phenolic resin while keeping the excellent performance of the boron phenolic resin, and plays a certain role in expanding more application fields of the boron phenolic resin.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a boron phenolic resin compositely modified by cashew nut shell oil and organic silicon, which is prepared from the following components in parts by weight:
preferably, the mass content of cardanol in the cashew nut shell oil is more than or equal to 50%.
Preferably, the silicone is polymethyl silicone resin and/or polyethyl silicone resin; when the organic silicon is polymethyl organic silicon resin and polyethylene organic silicon resin, the mass ratio of the polymethyl organic silicon resin to the polyethylene organic silicon resin is 1-2: 1-2.
Preferably, the catalyst is sodium hydroxide and/or barium hydroxide, and when the catalyst is sodium hydroxide and barium hydroxide, the mass ratio of the sodium hydroxide to the barium hydroxide is 1-2: 1-2.
The invention also provides a preparation method of the boron phenolic resin compositely modified by cashew nut shell oil and organic silicon, which comprises the following steps:
1) mixing phenol, paraformaldehyde and part of catalyst, and then reacting to obtain a first reactant;
2) reacting the first reactant with cashew nut shell oil to obtain a second reactant;
3) reacting the second reactant, boric acid and the rest of catalyst to obtain a third reactant;
4) and reacting the third reactant with organic silicon to obtain the composite modified boron phenolic resin.
Preferably, the reaction temperature in the step 1) is 85-95 ℃ and the reaction time is 55-70 minutes.
Preferably, the adding sequence of the raw materials during the mixing in the step 1) is as follows in sequence: phenol, paraformaldehyde and a part of catalyst, wherein the adding temperature of the phenol is 45-55 ℃, and the adding temperature of the paraformaldehyde is less than or equal to 65 ℃.
Preferably, the reaction temperature in the step 2) is 95-105 ℃, and the reaction time is 20-40 minutes.
Preferably, the reaction temperature in the step 3) is 110-120 ℃, and the reaction time is 70-100 minutes.
Preferably, the reaction temperature in the step 4) is 105-115 ℃, and the reaction time is 25-30 minutes.
The beneficial effects of the invention include the following:
1) the cashew nut shell oil contains cardanol and other phenolic compounds, and the cardanol and the other phenolic compounds have long unsaturated side carbon chains, so that on one hand, the cashew nut shell oil can replace phenol and formaldehyde to react, and the resin cost is reduced; on the other hand, due to the continuity of the unsaturated side carbon chain, the toughness of the resin is improved.
2) The organic silicon resin has special hydrophobicity, and can reduce the water absorption of the resin; meanwhile, the organic silicon resin has the advantage of no carbonization during decomposition, and can stabilize and improve the electrical property of a resin system.
3) According to the invention, the cashew nut shell oil and the organic silicon resin are introduced into the boron phenolic resin system, so that on the premise of retaining the excellent performance of the boron phenolic resin, the toughness of the resin is improved, the electrical property of the resin is stabilized, and convenience is provided for the boron phenolic resin to be suitable for more fields.
Detailed Description
The invention provides a boron phenolic resin compositely modified by cashew nut shell oil and organic silicon, which is prepared from the following components in parts by weight:
the preparation raw material of the boron phenolic resin comprises 90-110 parts of phenol, preferably 95-105 parts of phenol, more preferably 98-100 parts of phenol, and the mass content of the phenol is preferably more than or equal to 98%.
The raw material for preparing the boron phenolic resin comprises 40-55 parts of paraformaldehyde, preferably 43-52 parts of paraformaldehyde, more preferably 46-50 parts of paraformaldehyde, wherein the mass content of the paraformaldehyde is preferably not less than 95%, more preferably not less than 97%.
The preparation raw material of the boron phenolic resin comprises 20-30 parts of boric acid, preferably 22-28 parts of boric acid, more preferably 24-26 parts of boric acid, and the mass content of the boric acid is preferably more than or equal to 98%.
The boron phenolic resin provided by the invention comprises 10-20 parts of cashew nut shell oil, preferably 12-18 parts, and further preferably 14-16 parts; the mass content of cardanol in the cashew nut shell oil is preferably equal to or more than 50%, and more preferably equal to or more than 60%.
The raw material for preparing the boron phenolic resin comprises 5-15 parts of organic silicon, preferably 7-12 parts of organic silicon, and more preferably 9-10 parts of organic silicon.
The organic silicon is preferably polymethyl organic silicon resin and/or polyethyl organic silicon resin; when the organic silicon is polymethyl organic silicon resin and polyethylene organic silicon resin, the mass ratio of the polymethyl organic silicon resin to the polyethylene organic silicon resin is preferably 1-2: 1-2, and more preferably 1: 1.
The raw material for preparing the boron phenolic resin comprises 1.5-3 parts of catalyst, preferably 2 parts.
The catalyst is preferably sodium hydroxide and/or barium hydroxide, and when the catalyst is sodium hydroxide and barium hydroxide, the mass ratio of the sodium hydroxide to the barium hydroxide is preferably 1-2: 1-2, and more preferably 1: 1.
The invention also provides a preparation method of the boron phenolic resin compositely modified by cashew nut shell oil and organic silicon, which comprises the following steps:
1) mixing phenol, paraformaldehyde and part of catalyst, and then reacting to obtain a first reactant;
2) reacting the first reactant with cashew nut shell oil to obtain a second reactant;
3) reacting the second reactant, boric acid and the rest of catalyst to obtain a third reactant;
4) and reacting the third reactant with organic silicon to obtain the composite modified boron phenolic resin.
The reaction temperature in the step 1) is preferably 85-95 ℃, more preferably 88-92 ℃, and the reaction time is preferably 55-70 minutes, more preferably 60-65 minutes.
The adding sequence of the raw materials during the mixing in the step 1) of the invention is preferably sequentially added: the catalyst comprises phenol, paraformaldehyde and a part of catalyst, wherein the temperature in a reaction kettle is preferably 45-55 ℃ when the phenol is added, the material temperature in the reaction kettle is preferably less than or equal to 65 ℃ when the paraformaldehyde is added, and the part of catalyst is preferably a half of catalyst.
The reaction in step 1) of the present invention is preferably carried out under reflux, and more preferably stirred under reflux.
The reaction temperature in the step 2) is preferably 95-105 ℃, more preferably 98-102 ℃, more preferably 100 ℃, and the reaction time is preferably 20-40 minutes, more preferably 25-35 minutes.
The reaction temperature in the step 3) of the invention is preferably 110-120 ℃, more preferably 113-117 ℃, and the reaction time is preferably 70-100 minutes, more preferably 80-90 minutes.
The reaction temperature in the step 4) of the invention is preferably 105-115 ℃, more preferably 108-112 ℃, and the reaction time is preferably 25-30 minutes, more preferably 27-29 minutes.
Preferably, testing the viscosity of the material after the reaction in the step 4) is finished, and closing a reflux valve to perform reduced pressure dehydration treatment when the viscosity of the material is preferably 8000-12000 cPa/25 ℃; the time of the reduced pressure dehydration treatment is preferably 40-60 minutes, and further preferably 45-55 minutes; the pressure of the reduced-pressure dehydration treatment is preferably 600 to 700mmHg, and more preferably 630 to 660 mmHg.
After the decompression dehydration treatment is finished, preferably measuring the gel time when the material is in a transparent state, preferably measuring the gel time when the gel time is 110-130 seconds/178-182 ℃ to obtain solid resin, or adding a solvent to obtain liquid resin with different solid contents, wherein the solvent is preferably refined methanol and/or industrial ethanol, and the mass content of the industrial ethanol is preferably more than or equal to 95%; when the solvent is refined methanol and industrial ethanol, the mass ratio of the refined methanol to the industrial ethanol is preferably 6: 4.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Injecting 110kg of phenol into a reaction kettle at 50 ℃, then adding 40kg of paraformaldehyde and 0.75kg of sodium hydroxide when the temperature of materials in the reaction kettle is 60 ℃, and reacting for 70 minutes under the reflux state at 85 ℃; then 10kg of cashew nut shell oil containing 55% of cardanol by mass is added into a reaction kettle and reacted for 40 minutes at 95 ℃; further, 20kg of boric acid and 0.75kg of sodium hydroxide were added, and after 100 minutes of reaction at 110 ℃, 5kg of polymethylsilicone resin was added, and after 30 minutes of reaction at 105 ℃, the viscosity was measured. When the viscosity of the material is 8000 cPa/25 ℃, closing the reflux valve, and dehydrating under the reduced pressure of 600mmHg for 55 minutes; measuring the gel time when the material is transparent, and directly discharging to obtain the solid resin when the gel time is 110 seconds/180 ℃.
The solid resin obtained in example 1 has a solid content of 98%, the water absorption of the composite modified boron phenolic resin is reduced, the toughness and the electrical properties are improved, the water absorption of the modified resin is less than 1%, the tensile strength is 70MPa, the bending strength is 130MPa, the compressive strength is 280MPa, and the dielectric constant is 4 × 106HZ, dielectric strength of 5KW/mm, volume resistivity of 300 omega/cm2。
Example 2
Injecting 90kg of phenol into a 50 ℃ reaction kettle, adding 55kg of paraformaldehyde and 1.5kg of barium hydroxide when the temperature of materials in the reaction kettle is 55 ℃, and reacting for 55 minutes at the reflux state of 95 ℃; then 20kg of cashew nut shell oil containing 55% of cardanol by mass is added into a reaction kettle and reacted for 20 minutes at 105 ℃; 30kg of boric acid and 1.5kg of barium hydroxide were further added, and after 70 minutes of reaction at 120 ℃, 15kg of polyethyl silicone resin was added, and after 25 minutes of reaction at 115 ℃, the viscosity was measured. When the viscosity of the material is 10000 cPa/25 ℃, closing the reflux valve, and dehydrating under the reduced pressure of 700mmHg for 45 minutes; and measuring the gel time when the material is transparent, and adding industrial ethanol with the mass content of 95% when the gel time is 120 seconds/180 ℃ to obtain the liquid resin.
The solid content is the pure resin content after the solvent in the liquid resin is completely volatilized, the solid content in the liquid resin obtained in example 2 is 55 percent, the water absorption of the modified resin is reduced, and the toughness and the electrical property are improved, the water absorption of the composite modified boron phenolic resin is less than 1 percent, the tensile strength is 65MPa, the bending strength is 120MPa, the compressive strength is 260MPa, and the dielectric constant is 3 × 106HZ, dielectric strength of 4KW/mm, volume resistivity of 200 Ω/cm2。
Example 3
Injecting 100kg of phenol into a 50 ℃ reaction kettle, then adding 50kg of paraformaldehyde and 1kg of barium hydroxide when the temperature of materials in the reaction kettle is 55 ℃, and reacting for 60 minutes at 90 ℃ under a reflux state; then adding 15kg of cashew nut shell oil containing 55% of cardanol by mass into a reaction kettle, and reacting for 30 minutes at 100 ℃; 25kg of boric acid and 1kg of sodium hydroxide were further added, and after 80 minutes of reaction at 115 ℃, 5kg of polymethyl silicone resin and 5kg of polyethyl silicone resin were added, and after 25 minutes of reaction at 110 ℃, the viscosity was measured. When the viscosity of the material was 10000 cPa/25 deg.C, the reflux valve was closed and dehydration was carried out under reduced pressure of 650mmHg for 45 minutes; and measuring the gel time when the material is transparent, and adding a refined methanol solvent when the gel time is 120 seconds/180 ℃ to obtain the liquid resin.
The liquid resin obtained in example 3 had a solid content of 65%, the water absorption of the modified resin was reduced, and the toughness and electrical properties were improved, the water absorption of the composite modified borophenolic resin was < 1%, the tensile strength was 68MPa, the flexural strength was 125MPa, the compressive strength was 270MPa, and the dielectric constant was 3 × 106HZ, dielectric strength of 5KW/mm, and volume resistivity of 250 omega/cm2。
According to the invention, cashew nut shell oil which can participate in the reaction and has a toughening function is introduced into a boron phenolic resin system, so that the toughness of the resin is improved and part of the cost is reduced; the introduction of the organic silicon resin not only reduces the water absorption of the resin, but also stabilizes the electrical property of the resin. The invention maintains the excellent performance of the boron phenolic resin, improves the toughness of the resin, stabilizes the electrical performance of the resin and provides convenience for the boron phenolic resin to be suitable for more fields.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The boron phenolic resin compositely modified by cashew nut shell oil and organic silicon is characterized by being prepared from the following components in parts by weight:
2. the boron phenolic resin as claimed in claim 1, wherein the mass content of cardanol in the cashew nut shell oil is not less than 50%.
3. The borophenolic resin of claim 1 or 2, wherein the silicone is a polymethyl silicone resin and/or a polyethyl silicone resin; when the organic silicon is polymethyl organic silicon resin and polyethylene organic silicon resin, the mass ratio of the polymethyl organic silicon resin to the polyethylene organic silicon resin is 1-2: 1-2.
4. The boron phenolic resin as claimed in claim 3, wherein the catalyst is sodium hydroxide and/or barium hydroxide, and when the catalyst is sodium hydroxide and barium hydroxide, the mass ratio of the sodium hydroxide to the barium hydroxide is 1-2: 1-2.
5. The preparation method of the boron phenolic resin compositely modified by the cashew nut shell oil and the organic silicon as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
1) mixing phenol, paraformaldehyde and part of catalyst, and then reacting to obtain a first reactant;
2) reacting the first reactant with cashew nut shell oil to obtain a second reactant;
3) reacting the second reactant, boric acid and the rest of catalyst to obtain a third reactant;
4) and reacting the third reactant with organic silicon to obtain the composite modified boron phenolic resin.
6. The preparation method of claim 5, wherein the reaction temperature in step 1) is 85-95 ℃ and the reaction time is 55-70 minutes.
7. The preparation method according to claim 5 or 6, characterized in that the raw materials are added in the mixing step 1) in the following order: phenol, paraformaldehyde and a part of catalyst, wherein the adding temperature of the phenol is 45-55 ℃, and the adding temperature of the paraformaldehyde is less than or equal to 65 ℃.
8. The preparation method of claim 7, wherein the reaction temperature in the step 2) is 95-105 ℃ and the reaction time is 20-40 minutes.
9. The preparation method of claim 8, wherein the reaction temperature in step 3) is 110-120 ℃ and the reaction time is 70-100 minutes.
10. The preparation method of claim 9, wherein the reaction temperature in the step 4) is 105-115 ℃ and the reaction time is 25-30 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010443442.9A CN111423549A (en) | 2020-05-22 | 2020-05-22 | Boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and preparation method thereof |
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| CN202010443442.9A CN111423549A (en) | 2020-05-22 | 2020-05-22 | Boron phenolic resin compositely modified by cashew nut shell oil and organic silicon and preparation method thereof |
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Cited By (1)
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| CN117362560A (en) * | 2023-12-04 | 2024-01-09 | 山东永创材料科技有限公司 | Modified phenolic resin and preparation method thereof |
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