CN118146470A - Preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin - Google Patents
Preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin Download PDFInfo
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- CN118146470A CN118146470A CN202410258151.0A CN202410258151A CN118146470A CN 118146470 A CN118146470 A CN 118146470A CN 202410258151 A CN202410258151 A CN 202410258151A CN 118146470 A CN118146470 A CN 118146470A
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- Prior art keywords
- maleic anhydride
- phenolic resin
- nut oil
- cashew nut
- phenol
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 244000226021 Anacardium occidentale Species 0.000 title claims abstract description 38
- 235000020226 cashew nut Nutrition 0.000 title claims abstract description 38
- 239000010466 nut oil Substances 0.000 title claims abstract description 38
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 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 24
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 claims abstract description 24
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 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 20
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 19
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000005485 electric heating Methods 0.000 claims abstract description 10
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 30
- 239000008367 deionised water Substances 0.000 claims description 19
- 229910021641 deionized water Inorganic materials 0.000 claims description 19
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 9
- 238000007259 addition reaction Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 4
- 239000002028 Biomass Substances 0.000 claims description 4
- -1 cardanol modified phenolic resin Chemical class 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
- 238000003860 storage Methods 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 239000006260 foam Substances 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005187 foaming Methods 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract description 2
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 235000019492 Cashew oil Nutrition 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000010467 cashew oil Substances 0.000 description 3
- 229940059459 cashew oil Drugs 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 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 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction 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
- C08G8/30—Chemically modified polycondensates by unsaturated compounds, e.g. terpenes
-
- 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
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/24—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with mixtures of two or more phenols which are not covered by only one of the groups C08G8/10 - C08G8/20
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention relates to the technical field of chemical synthetic resin, and discloses a preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin, which comprises the following steps: step S1: first, preparing a production tool and raw materials, wherein the production tool comprises: a 500ml three-neck flask with a thermometer and an electric stirrer, an electric heating sleeve, a measuring cup, a precise electronic scale and a constant temperature water bath are added. Through maleic anhydride, cardanol, phenol and paraformaldehyde added, after the reaction, the obtained matters are more smooth in internal chemical molecular structure due to the change of chemical components and structures of raw materials, so that the viscosity of the modified phenolic resin is not easy to increase in the storage process, the heat absorption amount of the modified phenolic resin after absorbing heat is more, the modified phenolic resin is not easy to foam, the uniformity of the modified phenolic resin is more uniform when foaming, the foam is not easy to break after blowing, the tensile strength of the foam is increased, and compared with the existing phenolic resin, the modified cashew nut oil has more excellent toughening effect.
Description
Technical Field
The invention relates to the technical field of chemical synthetic resins, in particular to a preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin.
Background
Phenolic resins have better reinforcing, flame-retardant, low-smoke and easy-molding processing characteristics, and are mainly used for flame retardance and structural strength enhancement, and the production of the phenolic resins is carried out by taking phenol as a main production raw material.
The existing phenolic resin has the advantages that in the using process, although the existing phenolic resin can play a role in flame retardance and can strengthen the strength of a structure, the existing phenolic resin is increased in storage shelf life due to insufficient chemical stability of production raw materials, so that the condition that the existing phenolic resin is too short in shelf life in the storage process is caused, meanwhile, partial areas are unevenly foamed after the resin absorbs heat in the using process, the condition is caused due to insufficient heat absorption of the resin, and the practicability of the existing phenolic resin is reduced.
Disclosure of Invention
The invention provides a preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin, which has the advantages of good heat absorption, long storage time and lower viscosity increase length in the storage process, and solves the problems of the prior art.
The invention provides the following technical scheme: the preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin comprises the following steps:
Step S1: first, preparing a production tool and raw materials, wherein the production tool comprises: a 500ml three-neck flask with a thermometer and an electric stirrer is added, an electric heating sleeve, a measuring cup, a precise electronic scale and a constant temperature water bath, wherein the reagent comprises: p-toluenesulfonic acid and oxalic acid dihydrate, the modified phenolic resin comprises: maleic anhydride modified cashew nut oil, phenol, oxalic acid dihydrate, paraformaldehyde and deionized water, and the production raw materials comprise: maleic anhydride, cardanol, p-toluenesulfonic acid and deionized water;
Step S2: the maleic anhydride modified cashew nut oil is prepared from cardanol, p-toluenesulfonic acid and maleic anhydride, and the three medicaments are taken by a molar ratio method, wherein the specific ratio is n (cardanol): n (maleic anhydride): n (p-toluenesulfonic acid) =1:1.3:0.01, and adding the three into a three-neck flask after taking;
step S3: heating the inside of the three-neck flask to a temperature environment of 170 ℃ through an electric heating sleeve, wherein the reaction time is 3 hours;
Step S4: fully stirring by an electric stirrer in the reaction process, showering the product for more than 20min by cold water after the reaction is carried out for 3h, and then pouring out the reaction product (maleic anhydride modified cashew nut oil);
Step S5: likewise, phenol and paraformaldehyde are taken separately by a molar ratio method, wherein the specific ratio is n (phenol): n (paraformaldehyde) =1:0.08, putting phenol into a three-neck flask, then adding deionized water, heating to 50 ℃ through a constant-temperature water bath, waiting for dissolution of the phenol, and then adding weighed maleic anhydride modified cashew nut oil, oxalic acid dihydrate and paraformaldehyde respectively;
step S6: and heating the three-neck flask by an electric heating sleeve, so that the temperature environment in the three-neck flask is slowly heated to 100-110 ℃, the reaction time is 3h, after the reaction is finished, cooling the product in a water bath for more than 20min, and then pouring out the product to obtain the biomass cardanol modified phenolic resin.
As a preferred technical solution of the present invention, step S3 specifically includes: double bonds contained in the maleic anhydride can carry out addition reaction with allyl in the cardanol in the reaction process, and anhydride bonds in the maleic anhydride can carry out addition reaction with hydroxyl of the cardanol.
As a preferred technical solution of the present invention, step S4 specifically includes: the total mass of the maleic anhydride modified cashew nut oil and the phenol is 150g, wherein the consumption of the maleic anhydride modified cashew nut oil is 5-10%, the consumption of the phenol is 90-95%, and the deionized water is subjected to dosage adjustment (30-50 g) according to the use volume of the phenol.
As a preferred technical solution of the present invention, step S5 specifically includes: the dose of oxalic acid dihydrate was 1.7g, and oxalic acid dihydrate was used as a catalyst to accelerate the reaction between phenol, paraformaldehyde and maleic anhydride modified cashew nut oil.
As a preferable technical scheme of the invention, the deionized water is prepared by experimental equipment.
The invention has the following beneficial effects:
According to the preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin, through the added maleic anhydride, cardanol, phenol, paraformaldehyde, oxalic acid dihydrate and p-toluenesulfonic acid, in the production process, p-toluenesulfonic acid is utilized to catalyze the reaction between maleic anhydride and cardanol, so that the reaction efficiency is improved, after the maleic anhydride modified cashew nut oil is obtained, production personnel can mix the maleic anhydride modified cashew nut oil with phenol and paraformaldehyde, after the reaction, the obtained substance has a flatter internal chemical molecular structure due to the change of chemical components and structures of raw materials, so that the viscosity of the modified phenolic resin is not easy to increase in the storage process, the heat absorption amount after heat absorption is more, the foaming is not easy to be performed, the uniformity of the foam is more uniform in the foaming process, the foam is not easy to break after blowing, the tensile strength is increased, and compared with the existing phenolic resin, the modified cashew nut oil has a better toughening effect.
Drawings
FIG. 1 is a schematic illustration of a preparation process of the present invention;
FIG. 2 is a schematic diagram of physical and chemical properties of biomass cardanol modified phenolic resin of the present invention;
FIG. 3 is a graph showing the comparison of properties of resins before and after modification with maleic anhydride according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, a preparation method of a maleic anhydride grafted cashew oil modified phenolic resin comprises the following steps:
Step S1: first, preparing a production tool and raw materials, wherein the production tool comprises: a 500ml three-neck flask with a thermometer and an electric stirrer is added, an electric heating sleeve, a measuring cup, a precise electronic scale and a constant temperature water bath, wherein the reagent comprises: p-toluenesulfonic acid and oxalic acid dihydrate, the modified phenolic resin comprises: maleic anhydride modified cashew nut oil, phenol, oxalic acid dihydrate, paraformaldehyde and deionized water, and the production raw materials comprise: maleic anhydride, cardanol, p-toluenesulfonic acid and deionized water;
Step S2: the maleic anhydride modified cashew nut oil is prepared from cardanol, p-toluenesulfonic acid and maleic anhydride, and the three medicaments are taken by a molar ratio method, wherein the specific ratio is n (cardanol): n (maleic anhydride): n (p-toluenesulfonic acid) =1:1.3:0.01, and adding the three into a three-neck flask after taking;
step S3: heating the inside of the three-neck flask to a temperature environment of 170 ℃ through an electric heating sleeve, wherein the reaction time is 3 hours;
Step S4: fully stirring by an electric stirrer in the reaction process, showering the product for more than 20min by cold water after the reaction is carried out for 3h, and then pouring out the reaction product (maleic anhydride modified cashew nut oil);
Step S5: likewise, phenol and paraformaldehyde are taken separately by a molar ratio method, wherein the specific ratio is n (phenol): n (paraformaldehyde) =1:0.08, putting phenol into a three-neck flask, then adding deionized water, heating to 50 ℃ through a constant-temperature water bath, waiting for dissolution of the phenol, and then adding weighed maleic anhydride modified cashew nut oil, oxalic acid dihydrate and paraformaldehyde respectively;
step S6: and heating the three-neck flask by an electric heating sleeve, so that the temperature environment in the three-neck flask is slowly heated to 100-110 ℃, the reaction time is 3h, after the reaction is finished, cooling the product in a water bath for more than 20min, and then pouring out the product to obtain the biomass cardanol modified phenolic resin.
Through adding maleic anhydride, cardanol reacts with maleic anhydride in the reaction environment provided by heating and the catalysis of p-toluenesulfonic acid, so that maleic anhydride modified cashew nut oil is formed, and the chemical stability of the combination of the cardanol and the maleic anhydride modified cashew nut oil is improved in the reaction process with phenol, so that the viscosity increase degree of the resin caused by the change of the ambient temperature and the humidity in the storage process is reduced, and the storage time of the phenolic resin is prolonged.
In a preferred embodiment, the double bonds contained in the maleic anhydride undergo an addition reaction with allyl groups in cardanol during the reaction, while the anhydride bonds in the maleic anhydride undergo an addition reaction with hydroxyl groups of cardanol.
The carbocation in the allyl is an important active intermediate in organic chemical reaction, alpha-position carbon of a C-C double bond loses a pair of electrons and has partial positive charges, p orbits on carbon atoms and pi bonds of the C-C double bond form p-pi conjugation effect, molecules are in a planar structure, and electron clouds on the C-C double bond are dispersed in a delocalized mode, so that the chemical stability of production raw materials is improved, the modified phenolic resin is further ensured to be easy to store after production, and the stable structure of the modified phenolic resin can also avoid the occurrence of bubbles generated after heat absorption of the resin.
In a preferred embodiment, the total mass of the maleic anhydride modified cashew oil and the phenol is 150g, wherein the consumption of the maleic anhydride modified cashew oil is between 5 and 10 percent, the consumption of the phenol is between 90 and 95 percent, and the deionized water is subjected to dosage adjustment (30 g-50 g) according to the usage volume of the phenol.
After the ionic impurities in the deionized water are removed, soluble organic matters are also present in the deionized water, so that the phenol is dissolved after the deionized water is mixed with the phenol, the mixing degree and the contact area of the phenol and the maleic anhydride are increased, and the guarantee is ensured
In a preferred embodiment, the dosage of oxalic acid dihydrate is 1.7g, and the oxalic acid dihydrate is used as a catalyst to accelerate the reaction between phenol, paraformaldehyde and maleic anhydride modified cashew nut oil, and the oxalic acid dihydrate is used as the catalyst to accelerate the chemical reaction of the phenol, paraformaldehyde and maleic anhydride modified cashew nut oil, so that the production time of a final product is shortened, and the production efficiency of operators on the modified phenolic resin is improved.
In a preferred embodiment, deionized water is prepared by experimental equipment, the deionized water is simpler to obtain than other soluble liquids, and meanwhile, the water body is taken as a natural element to occupy a larger resource, so that the source of production raw materials can be increased, and the production cost of the modified phenolic resin is reduced.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin is characterized by comprising the following steps of:
Step S1: first, preparing a production tool and raw materials, wherein the production tool comprises: a 500ml three-neck flask with a thermometer and an electric stirrer is added, an electric heating sleeve, a measuring cup, a precise electronic scale and a constant temperature water bath, wherein the reagent comprises: p-toluenesulfonic acid and oxalic acid dihydrate, the modified phenolic resin comprises: maleic anhydride modified cashew nut oil, phenol, oxalic acid dihydrate, paraformaldehyde and deionized water, and the production raw materials comprise: maleic anhydride, cardanol, p-toluenesulfonic acid and deionized water;
Step S2: the maleic anhydride modified cashew nut oil is prepared from cardanol, p-toluenesulfonic acid and maleic anhydride, and the three medicaments are taken by a molar ratio method, wherein the specific ratio is n (cardanol): n (maleic anhydride): n (p-toluenesulfonic acid) =1:1.3:0.01, and adding the three into a three-neck flask after taking;
step S3: heating the inside of the three-neck flask to a temperature environment of 170 ℃ through an electric heating sleeve, wherein the reaction time is 3 hours;
Step S4: fully stirring by an electric stirrer in the reaction process, showering the product for more than 20min by cold water after the reaction is carried out for 3h, and then pouring out the reaction product (maleic anhydride modified cashew nut oil);
Step S5: likewise, phenol and paraformaldehyde are taken separately by a molar ratio method, wherein the specific ratio is n (phenol): n (paraformaldehyde) =1:0.08, putting phenol into a three-neck flask, then adding deionized water, heating to 50 ℃ through a constant-temperature water bath, waiting for dissolution of the phenol, and then adding weighed maleic anhydride modified cashew nut oil, oxalic acid dihydrate and paraformaldehyde respectively;
step S6: and heating the three-neck flask by an electric heating sleeve, so that the temperature environment in the three-neck flask is slowly heated to 100-110 ℃, the reaction time is 3h, after the reaction is finished, cooling the product in a water bath for more than 20min, and then pouring out the product to obtain the biomass cardanol modified phenolic resin.
2. The preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin is characterized by comprising the following steps: the step S3 specifically comprises the following steps: double bonds contained in the maleic anhydride can carry out addition reaction with allyl in cardanol in the reaction process, and anhydride bonds in the maleic anhydride can carry out addition reaction with hydroxyl of cardanol, wherein the chemical combination formula of the two reactions is as follows:
3. The preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin is characterized by comprising the following steps: the step S4 specifically comprises the following steps: the total mass of the maleic anhydride modified cashew nut oil and the phenol is 150g, wherein the consumption of the maleic anhydride modified cashew nut oil is 5-10%, the consumption of the phenol is 90-95%, and the deionized water is subjected to dosage adjustment (30-50 g) according to the use volume of the phenol.
4. The preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin is characterized by comprising the following steps: the step S5 specifically comprises the following steps: the dose of oxalic acid dihydrate was 1.7g, and oxalic acid dihydrate was used as a catalyst to accelerate the reaction between phenol, paraformaldehyde and maleic anhydride modified cashew nut oil.
5. The preparation method of the maleic anhydride grafted cashew nut oil modified phenolic resin is characterized by comprising the following steps: the deionized water is prepared by experimental equipment.
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| CN202410258151.0A CN118146470A (en) | 2024-03-07 | 2024-03-07 | Preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin |
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| CN202410258151.0A CN118146470A (en) | 2024-03-07 | 2024-03-07 | Preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin |
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| CN202410258151.0A Pending CN118146470A (en) | 2024-03-07 | 2024-03-07 | Preparation method of maleic anhydride grafted cashew nut oil modified phenolic resin |
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