CN114920895B - Preparation method of cold-resistant furan resin - Google Patents
Preparation method of cold-resistant furan resin Download PDFInfo
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- CN114920895B CN114920895B CN202210717097.2A CN202210717097A CN114920895B CN 114920895 B CN114920895 B CN 114920895B CN 202210717097 A CN202210717097 A CN 202210717097A CN 114920895 B CN114920895 B CN 114920895B
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- 239000007849 furan resin Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 claims abstract description 90
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 56
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 19
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 19
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 19
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000007822 coupling agent Substances 0.000 claims description 17
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 229920002866 paraformaldehyde Polymers 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 14
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 13
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 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 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 239000011347 resin Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000008098 formaldehyde solution Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 150000008064 anhydrides Chemical class 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical group CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 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
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/04—Chemically modified polycondensates
-
- 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
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/025—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds
- C08G16/0256—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds containing oxygen in the ring
- C08G16/0262—Furfuryl alcohol
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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)
- General Chemical & Material Sciences (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The application belongs to the field of furan resin production, and provides a preparation method of cold-resistant furan resin, which utilizes a cold-resistant agent to react with furfuryl alcohol formaldehyde, wherein the cold-resistant agent mainly comprises rosin and glycol mixed solution, and 1 part of rosin is dissolved in 4 parts of glycol to prepare the cold-resistant agent. The cold-resistant furan resin can effectively improve the stability of the furan resin in a low-temperature environment, and can enhance the weather resistance of the furan resin after the cold-resistant agent is added, so that the furan resin can be used under most severe conditions, the performances of the furan resin are improved, the synthesis process is easy to control and is not easy to gel and solidify, the free formaldehyde content is low, and the furan resin can be normally used in the low-temperature environment.
Description
Technical Field
The application belongs to the technical field of furan resin production, and particularly relates to a preparation method of cold-resistant furan resin.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the application and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
With the continuous development of technology, the application field of furan resin is more and more extensive, and the furan resin is widely applied to the production of medium-sized complex castings in various fields such as nuclear power, automobiles, machine tools, wind power, ships and the like at present. In recent years, with the rapid development of new energy automobiles and wind power industry, the market demand of furan resin is driven to rise, and further the continuous rising of the yield of furan resin is promoted. With the continuous increase of the yield, the resin adapting to different castings is generated. In certain areas, the winter air temperature is lower, the lowest temperature reaches minus 10 ℃, partial coagulation phenomenon can occur in the resin during the use process, even the resin can be frozen, the general method is that methanol is added into the resin to reduce the solidifying point of the resin, and the ideal effect can be achieved after the addition amount of the methanol or the ethanol must reach a certain proportion. This not only reduces the strength of the resin, but also increases the brittleness of the resin, which is disadvantageous for casting. And also causes a hazard due to too high a methanol content.
Disclosure of Invention
According to the preparation method of the cold-resistant furan resin, the cold-resistant furan resin is obtained by reacting the cold-resistant agent with furfuryl alcohol formaldehyde, so that the stability of the furan resin in a low-temperature environment can be effectively improved, the weather resistance of the furan resin can be enhanced after the cold-resistant agent is added, the furan resin can be used under most severe conditions, the resin sand ignition loss is reduced, the performances of the furan resin in all aspects are improved, the synthesis process is easy to control, the gel solidification is difficult, the free formaldehyde content is low, and the furan resin can be normally used in the low-temperature environment. The cold-resistant agent mainly contains rosin and glycol mixed solution, and 1 part of rosin is dissolved in 4 parts of glycol to prepare the cold-resistant agent.
In order to achieve the above purpose, the present application adopts the following technical scheme:
in a first aspect of the application, a cold-resistant furan resin is provided, which is composed of the following raw materials in parts by weight: 5-30 parts of liquid formaldehyde, 5-10 parts of paraformaldehyde, 6-18 parts of urea, 40-70 parts of furfuryl alcohol, 2-4 parts of cold-resistant agent, 0.5-1 part of maleic anhydride, 0.2-3 parts of formaldehyde remover and 0.2-0.6 part of coupling agent;
the cold-resistant agent is as follows: rosin and ethylene glycol mixtures.
According to the application, the organic resin is modified by adopting the material with excellent cold resistance and insulation property, so that the performances of furan resin in all aspects can be effectively improved, and the requirements of different environments are met.
In a second aspect of the present application, there is provided a method for producing a cold-resistant furan resin, comprising:
uniformly mixing formaldehyde solution, paraformaldehyde and part of furfuryl alcohol, adding a cold-resistant agent, and regulating the pH value to 3-4 to obtain a mixed solution;
heating the mixed solution to 80-90 ℃ and preserving heat for 2-3 hours, continuously heating to 110-120 ℃ and preserving heat for 3-4 hours, cooling to about 80 ℃, adding urea and part of furfuryl alcohol, regulating pH to 8-9, reacting at 90-95 ℃, regulating pH to 4-5, and continuously reacting for 1-1.5 hours; adding residual furfuryl alcohol, cooling to 56-60 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly mixing; adjusting the pH value to be neutral, uniformly mixing, and discharging to obtain the product.
The beneficial effects of the application are that
(1) According to the application, the cold-resistant furan resin is obtained by reacting the cold-resistant agent with furfuryl alcohol formaldehyde, so that the stability of the furan resin in a low-temperature environment can be effectively improved, and the weather resistance of the furan resin can be enhanced after the cold-resistant agent is added, so that the furan resin can be used under most severe conditions, the performances of the furan resin are improved, the synthesis process is easy to control, gel solidification is not easy to realize, the free formaldehyde content is low, and the furan resin can be normally used in a low-temperature environment. The cold-resistant agent mainly contains rosin and glycol mixed solution, and 1 part of rosin is dissolved in 4 parts of glycol to prepare the cold-resistant agent.
(2) The preparation method is simple, has strong practicability and is easy to popularize.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
The preparation of the cold-resistant furan resin comprises the following steps:
(1) Adding 37% formaldehyde solution, paraformaldehyde and part of furfuryl alcohol into a reaction kettle, stirring and mixing, adding a cold-resistant agent, and adjusting the pH value to about 3-4 by using organic acid (maleic anhydride and p-toluenesulfonic acid);
(2) Then heating to 80 ℃ and preserving heat for 2-3 hours, continuously heating to 110 ℃ and preserving heat for 3-4 hours,
(3) Cooling to about 80deg.C, adding urea and furfuryl alcohol, adjusting pH to 8-9 with liquid alkali, reacting at 90-95deg.C,
the pH was adjusted to 4-5 with anhydride and the reaction was continued for 1 hour. Adding the residual furfuryl alcohol, cooling to 56 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly stirring and mixing;
(4) Regulating the pH value to be neutral, continuously stirring uniformly, and discharging to obtain the product.
In some embodiments, the cold-resistant agent is: rosin (gum rosin) and ethylene glycol mixture (1:4).
In some embodiments, the aldehyde scavenger is: 18% ammonia.
In some embodiments, the coupling agent is: n-beta- (aminoethyl) -gamma-aminopropyl methyldimethoxy silane.
In some embodiments, the parts by weight of the raw materials in each of the above reaction stages are: 5-30 parts of liquid formaldehyde, 5-10 parts of paraformaldehyde, 6-18 parts of urea, 40-70 parts of furfuryl alcohol, 2-4 parts of cold-resistant agent, 0.5-1 part of maleic anhydride, 0.2-3 parts of formaldehyde remover and 0.2-0.6 part of coupling agent.
The application will now be described in further detail with reference to the following specific examples, which should be construed as illustrative rather than limiting.
In the following examples, the aldehyde scavenger is: 18% ammonia.
Example 1:
a preparation method of cold-resistant furan resin comprises the following steps:
(1) Adding 37% formaldehyde solution, paraformaldehyde and partial furfuryl alcohol (30 parts) into a reaction kettle, stirring and mixing, adding a cold-resistant agent, and regulating the pH value to 3 by using maleic anhydride;
(2) Then heating to 80 ℃ for 2 hours, continuing heating to 110 ℃ for 3 hours,
(3) Cooling to about 80 ℃, adding urea and furfuryl alcohol (15 parts), adjusting the pH to 8 by liquid alkali, reacting at 90-95 ℃, and preserving the heat for 1 hour; the pH was adjusted to 4 with anhydride and the reaction was continued for 1 hour. Adding the residual furfuryl alcohol (25 parts), cooling to 56 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly stirring and mixing;
(4) Regulating the pH value to be neutral, continuously stirring uniformly, and discharging to obtain the product.
The raw materials in each reaction stage are as follows in parts by weight: 6 parts of liquid formaldehyde, 5 parts of paraformaldehyde, 6 parts of urea, 70 parts of furfuryl alcohol, 2 parts of cold-resistant agent, 1 part of maleic anhydride, 0.2 part of formaldehyde remover and 0.2 part of coupling agent.
Wherein the addition amount of furfuryl alcohol in the step (1) and the step (3) is 3:1.
The solid formaldehyde is paraformaldehyde with low polymerization degree, and the content of the solid formaldehyde is 93%.
The coupling agent is N- (beta-aminoethyl) -gamma-aminopropyl methyl dimethoxy silane.
The maleic anhydride content was 99%.
The sodium hydroxide solution concentration was 30%.
Rosin (gum rosin) and ethylene glycol mixture (1:4).
Example 2:
a preparation method of cold-resistant furan resin comprises the following steps:
(1) Adding 37% formaldehyde solution, paraformaldehyde and part of furfuryl alcohol (20 parts) into a reaction kettle, stirring and mixing, adding a cold-resistant agent, and regulating the pH value to be 4 by using maleic anhydride;
(2) Then heating to 80 ℃ for 3 hours, continuing heating to 110 ℃ for 4 hours,
(3) Cooling to about 80 ℃, adding urea and furfuryl alcohol (11 parts), adjusting the pH to 9 by liquid alkali, reacting at 95 ℃, and preserving the heat for 1 hour; the pH was adjusted to 4 with anhydride and the reaction was continued for 1 hour. Adding the residual furfuryl alcohol (19 parts), cooling to 60 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly stirring and mixing;
(4) Regulating the pH value to be neutral, continuously stirring uniformly, and discharging to obtain the product.
The raw materials in each reaction stage are as follows in parts by weight: 23 parts of liquid formaldehyde, 5 parts of paraformaldehyde, 13 parts of urea, 50 parts of furfuryl alcohol, 3 parts of cold-resistant agent, 0.8 part of maleic anhydride, 1.5 parts of formaldehyde remover and 0.3 part of coupling agent.
The addition amount of furfuryl alcohol in the step (1) and the step (3) is 3:1.
The solid formaldehyde is paraformaldehyde with low polymerization degree, and the content of the solid formaldehyde is 93%.
The coupling agent is N- (beta-aminoethyl) -gamma-aminopropyl methyl dimethoxy silane.
The maleic anhydride content was 99%.
The sodium hydroxide solution concentration was 30%.
Rosin (gum rosin) and ethylene glycol mixture (1:4)
Example 3:
a preparation method of cold-resistant furan resin comprises the following steps:
(1) Adding 37% formaldehyde solution, paraformaldehyde and part of furfuryl alcohol (13 parts) into a reaction kettle, stirring and mixing, adding a cold-resistant agent, and adjusting the pH value to 3.5 by using p-toluenesulfonic acid;
(2) Then heating to 80 ℃ and preserving heat for 2.5 hours, continuously heating to 110 ℃ and preserving heat for 3.5 hours,
(3) Cooling to about 80 ℃, adding urea and furfuryl alcohol (7 parts), adjusting the pH to 9 with liquid alkali, reacting at 92 ℃, and preserving the heat for 1 hour; the pH was adjusted to 3.3 with anhydride and the reaction was continued for 1 hour. Adding the residual furfuryl alcohol, cooling to 60 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly stirring and mixing;
(4) Regulating the pH value to be neutral, continuously stirring uniformly, and discharging to obtain the product.
The raw materials in each reaction stage are as follows in parts by weight: 30 parts of liquid formaldehyde, 6 parts of paraformaldehyde, 18 parts of urea, 30 parts of furfuryl alcohol, 3 parts of cold-resistant agent, 0.5 part of maleic anhydride, 2 parts of formaldehyde remover and 0.6 part of coupling agent.
The addition amount of furfuryl alcohol in the step (1) and the step (3) is 3:1.
The solid formaldehyde is paraformaldehyde with low polymerization degree, and the content of the solid formaldehyde is 93%.
The coupling agent is N- (beta-aminoethyl) -gamma-aminopropyl methyl dimethoxy silane.
The maleic anhydride content was 99%.
The sodium hydroxide solution concentration was 30%.
Rosin (gum rosin) and ethylene glycol mixture (1:3).
Comparative example 1
The difference from example 1 is that no cold-resistant agent was added.
Comparative example 2
The difference from example 1 is that the cold-resistant agent is ethylene glycol.
Comparative example 3
The difference from example 2 is that no cold-resistant agent was added.
Comparative example 4
The difference from example 2 is that the cold-resistant agent is ethylene glycol.
Comparative example 5
The difference from example 3 is that no cold-resistant agent was added.
Comparative example 6
The difference from example 3 is that the cold-resistant agent is ethylene glycol.
TABLE 1
TABLE 2
TABLE 3 Table 3
Analysis: according to the data analysis of tables 1, 2 and 3, after the cold-resistant agent is added, the stability of the resin in examples 1-3 is obviously higher than that of the resin without the cold-resistant agent under the low-temperature environment (refrigeration is carried out at the temperature of-5, -10, -15, -20 and-25 ℃ respectively) and the ignition loss of the reclaimed sand can be reduced after the cold-resistant agent is added (the detection method is referred to GB/T7531-2008), so that the gas generation amount in the using process and the resin addition amount in the mixing process of the core sand can be reduced, and the casting quality can be improved. The content of free formaldehyde (the detection method refers to JB/T7526-2008) is obviously lower, and the working environment of foundry workers is improved. The tensile strength (JB/T7526-2008) of the new resin is basically unchanged and slightly better than that of the normal resin.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The cold-resistant furan resin is characterized by comprising the following raw materials in parts by weight: 5-30 parts of liquid formaldehyde, 5-10 parts of paraformaldehyde, 6-18 parts of urea, 40-70 parts of furfuryl alcohol, 2-4 parts of cold-resistant agent, 0.5-1 part of maleic anhydride, 0.2-3 parts of formaldehyde remover and 0.2-0.6 part of coupling agent;
the cold-resistant agent is as follows: rosin and ethylene glycol mixture;
in the rosin and ethylene glycol mixture, the mass ratio of the rosin to the ethylene glycol is 1: 3-4;
the preparation method of the cold-resistant furan resin comprises the following steps:
uniformly mixing liquid formaldehyde, paraformaldehyde and part of furfuryl alcohol, adding a cold-resistant agent, and regulating the pH value to 3-4 to obtain a mixed solution;
heating the mixed solution to 80-90 ℃ and preserving heat for 2-3 hours, continuously heating to 110-120 ℃ and preserving heat for 3-4 hours, cooling to about 80 ℃, adding urea, partial furfuryl alcohol, adjusting pH to 8-9, reacting at 90-95 ℃, adjusting pH to 4-5, and continuously reacting for 1-1.5 hours; adding the residual furfuryl alcohol, cooling to 56-60 ℃, adding an aldehyde removing agent and a coupling agent, and uniformly mixing; adjusting the pH value to be neutral, uniformly mixing, and discharging to obtain the product.
2. The cold resistant furan resin of claim 1, wherein said aldehyde scavenger is 16% -18% aqueous ammonia.
3. The cold resistant furan resin of claim 1, wherein said coupling agent is N- β - (aminoethyl) - γ -aminopropyl methyldimethoxysilane.
4. The cold resistant furan resin of claim 1, wherein the concentration of liquid formaldehyde is from 35% to 40%.
5. The cold resistant furan resin of claim 1, wherein the pH is adjusted to 3-4 with an organic acid; the organic acid is maleic anhydride or p-toluenesulfonic acid.
6. The cold resistant furan resin of claim 1, wherein said cold resistant agent is prepared by a process comprising: and (3) dissolving rosin in glycol, and uniformly mixing to obtain the product.
7. The cold resistant furan resin of claim 1, wherein the pH is adjusted to 8-9 using a caustic soda liquid, wherein the caustic soda liquid is a sodium hydroxide solution, and wherein the concentration of the sodium hydroxide solution is 20-30%.
8. The cold resistant furan resin of claim 1, wherein said paraformaldehyde is present in an amount of from 90.0% to 99.9%.
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Denomination of invention: Preparation method of cold resistant furan resin Granted publication date: 20230929 Pledgee: China Co. truction Bank Corp Zhucheng branch Pledgor: Shandong Yongchuang Material Technology Co.,Ltd. Registration number: Y2024980031208 |