CN114805717B - Capsaicin phenolic resin, and preparation and application thereof - Google Patents
Capsaicin phenolic resin, and preparation and application thereof Download PDFInfo
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- CN114805717B CN114805717B CN202210282609.7A CN202210282609A CN114805717B CN 114805717 B CN114805717 B CN 114805717B CN 202210282609 A CN202210282609 A CN 202210282609A CN 114805717 B CN114805717 B CN 114805717B
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- 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
- C08G8/32—Chemically modified polycondensates by organic acids or derivatives thereof, e.g. fatty oils
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C09D161/14—Modified phenol-aldehyde condensates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
Abstract
The invention discloses capsaicin phenolic resin, and preparation and application thereof; the preparation method comprises the following steps: (1) Adding capsaicin, formaldehyde and a catalyst 1 into a reactor, heating and preserving heat, cooling to room temperature to obtain a crude capsaicin resin monomer, neutralizing the mixture with acetic acid, and extracting with diethyl ether to obtain the capsaicin resin monomer; (2) Adding phenol, formaldehyde and a catalyst 2 into a reactor, controlling the temperature during heating, preserving heat, cooling to room temperature to obtain a crude product, transferring the crude product into a reduced pressure distillation kettle, and removing water through reduced pressure distillation to obtain phenolic resin; (3) Adding capsaicin resin monomer, phenolic resin and catalyst 3 into a reactor, heating, preserving heat, cooling, and adding solvent and additive to obtain capsaicin modified phenolic resin. The preparation method is simple, environment-friendly and efficient, and the obtained capsaicin-modified phenolic resin can effectively inhibit the attachment and propagation of marine organisms through the expelling effect, and can achieve long-acting pollution-free antifouling.
Description
Technical Field
The invention relates to the technical field of marine antifouling paint, in particular to capsaicin phenolic resin, and preparation and application thereof.
Background
Marine fouling organisms are organisms attached to objects such as ships, underwater facilities, culture net boxes, sea water pipelines and the like in the ocean, the organisms are often attached to the surfaces of marine equipment, the marine fouling organisms grow rapidly in large quantity, serious adverse consequences such as ship speed reduction, energy consumption increase, corrosion aggravation and the like are caused, and a large amount of economic loss is caused. Conventional organotin (TBT), cuprous oxide (Cu 2 O) paint is widely used because of high antifouling efficiency and long aging, but has strong toxicity and large environmental pollution, and is forbidden to use. Therefore, the development of novel environment-friendly marine antifouling paint becomes the development direction of the current marine antifouling paint. Capsaicin is a stable alkaloid, is not affected by temperature, and has antibacterial and marine organism preventing effectsLong function. The capsaicin-containing antifouling material can kill marine organisms and achieve the aim of antifouling through the expelling effect, does not destroy natural ecology and pollute the environment, and is an environment-friendly antifouling material.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides capsaicin phenolic resin and preparation and application thereof.
The invention is realized by the following technical scheme:
a preparation method of capsaicin modified phenolic resin comprises the following steps:
(1) The preparation process of the capsaicin resin monomer comprises the following steps: according to the capsaicin, formaldehyde and the catalyst 1 as 100: 20-100: adding the three substances into a reactor according to the mass ratio of 0.05-10.0, controlling the reaction temperature to be 30-100 ℃, preserving the heat for 12-36 hours, and cooling to room temperature to obtain a crude capsaicin resin monomer; neutralizing the mixture with acetic acid, extracting the mixture with diethyl ether, combining the diethyl ether extracts with a desiccant, removing diethyl ether on a rotary evaporator until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain capsaicin resin monomer;
(2) The preparation process of the phenolic resin comprises the following steps: according to phenol: formaldehyde: catalyst 2 was 100: 20-200: adding the three substances into a reactor according to the mass ratio of 0.05-10.0, controlling the reaction temperature to be 40-100 ℃, preserving heat for 1-8 h, cooling to room temperature to obtain crude phenolic resin, transferring the crude phenolic resin into a reduced pressure distillation kettle, removing water through reduced pressure distillation under the conditions that the temperature is 40-110 ℃ and the vacuum degree is 0.03-0.09 MPa, until the water content is below 0.5%, and cooling to room temperature to obtain phenolic resin;
(3) Phenolic resin modification: the capsaicin resin monomer obtained according to (1), the phenolic resin obtained according to (2) and the catalyst 3 are 25-35: 100: adding the three substances into a reactor according to the mass ratio of 0.1-10, controlling the temperature to be 100-200 ℃, cooling to 25-40 ℃ for 1-10 hours, adding a solvent and an additive, and packaging to obtain a product;
preferably, the catalyst 1 in the step (1) is one or more of sodium hydroxide, trifluoroacetic acid and zinc oxide.
Preferably, the catalyst 2 in the step (2) is one or more of sodium hydroxide, trifluoroacetic acid, zinc oxide and aluminum oxide.
Preferably, the catalyst 3 in the step (3) is one or more of sodium hydroxide, alumina and cyclopropene.
Preferably, the solvent in the step (3) is one or more of benzene, toluene, xylene, methanol, ethanol and acetone.
Preferably, the additive in the step (3) is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, polyamide, epoxy resin E20, epoxy resin E44, epoxy resin E51, organic tin and tributyl phosphate.
Preferably, the capsaicin in step (1) has the structural formula:
preferably, the drying agent in step (1) is sodium sulfate Na2SO4.
Preferably, the mass concentration of the acetic acid in the step (1) is 15-30%.
Preferably, the mass concentration of formaldehyde in the step (1) is 20-40%.
Preferably, the pH of the acetic acid neutralization process described in step (1) is finally controlled to be 5.
Preferably, the mass concentration of formaldehyde in the step (2) is 20-40%.
In order to improve the reaction speed and control the molecular weight of the product, the invention adopts three-stage catalytic reaction, and the dehydration process is only carried out before the third step of product packaging, so that the water content of the product is reduced to below 0.5 percent.
In order to improve the purity of the product and prevent other reaction processes, the extraction process is only carried out after the first-stage reaction, and the ether content after extraction is reduced to below 0.5%.
The principle of the invention is as follows: the preparation of the capsaicin modified phenolic resin mainly comprises the steps of reacting formaldehyde with capsaicin under the action of a catalyst to generate a capsaicin resin monomer, reacting phenol with formaldehyde under the action of the catalyst to generate phenolic resin, and reacting phenolic hydroxyl ortho-active hydrogen on a phenolic resin molecular chain with alcoholic hydroxyl on the capsaicin resin monomer under the action of the catalyst to generate Friedel-Crafts reaction to generate the capsaicin modified phenolic resin, wherein the main steps comprise: (1) Reacting formaldehyde with capsaicin in the presence of a catalyst to produce a capsaicin resin monomer; (2) Phenol and formaldehyde react under the action of an acid catalyst to generate phenolic resin; (3) The capsaicin resin and the phenolic resin react under the action of a catalyst to generate the capsaicin modified phenolic resin.
The reaction equation can be expressed as follows:
the capsaicin modified phenolic resin material can be used as marine anticorrosive paint to effectively inhibit the attachment and propagation of marine organisms, and has the advantages of simple method and convenient operation.
Compared with the prior art, the invention has the following advantages and effects:
according to the invention, capsaicin is used as a main modified material to prepare the phenolic resin containing capsaicin, and the capsaicin is natural and environment-friendly, and can effectively inhibit the growth and propagation of marine organisms when being applied to marine antifouling paint. According to the invention, capsaicin reacts with formaldehyde, an alcoholic hydroxyl group is introduced into a capsaicin benzene ring, and the capsaicin benzene ring reacts with a phenolic hydroxyl ortho-active hydrogen on phenolic resin to generate Friedel-Crafts reaction, so that the modified phenolic resin is obtained. Compared with a method of simply blending capsaicin into the paint, the capsaicin is connected with macromolecules through reaction, is difficult to separate, and can ensure long-term effective antifouling effect.
The capsaicin modified phenolic resin coating prepared by the invention has the advantages of simple process, mild reaction conditions, low temperature, energy conservation, environmental protection, safety and easy operation.
The capsaicin modified phenolic resin coating prepared by the invention has low reaction temperature, and does not have the problems of volatilization of auxiliary solvent, inaccurate proportioning and poor product performance caused by high-temperature heating.
The preparation method of the capsaicin modified phenolic resin has the advantages of wide selection range of raw materials and wide raw material sources.
The capsaicin modified phenolic resin prepared by the invention can be cured into a film at normal temperature, the curing time is reasonable, and the practical application and construction are convenient.
The preparation method of the paint coating prepared by the invention comprises the following steps: according to the national standard GB/T9271-2008 "Standard test Board for color paint and varnish" and the national standard GB1727-92 "general preparation method for paint film", the surface of tinplate (120 mm. Times.50 mm. Times.0.3 mm) is scrubbed by absolute ethyl alcohol to remove ash layer and oil stain on the surface, the paint is uniformly coated on the tinplate by adopting a 90 μm paint film preparation machine, and dried to form the film.
The main performance characterization method of the paint prepared by the invention is as follows:
drying performance test: the method is carried out according to the method specified in national standard GB/T1728-1979 'paint film and putty film drying time determination method'.
Viscosity performance test: the method is carried out according to the method specified in the national standard GB1723-1993 coating viscosity measurement method.
Hardness performance test: the method is carried out according to the method specified in national standard GB/T6739-2006, paint film hardness is measured by the method of color paint and varnish pencil.
Flexibility performance test: the method is carried out according to the method specified in the national standard GB/T1731-1993 paint film flexibility determination.
Adhesion performance test: the method is carried out according to the method prescribed in the national standard GBT9286-1998, cross-cut test of color paint and varnish film.
Impact resistance performance test: the method is carried out according to the method specified in national standard GB/T1732-1993 paint film impact resistance measurement.
Antifouling performance test: the method is implemented according to the method specified in national standard GB/T5370-2007 "antifouling paint sample plate shallow sea soaking test method".
Antibacterial performance test: the method is implemented according to the method specified in the chemical industry standard HG/T3950-2007 antibacterial paint.
FTIR infrared analysis: the varnish is characterized by adopting a Fourier transform infrared spectrometer, and the measuring range is 4000-400 cm -1 。
Drawings
FIG. 1 is a Fourier infrared spectrum of a capsaicin-modified phenolic resin coating of example 1 of the invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The raw material formula is shown in the table:
step (1); the capsaicin reacts with formaldehyde under the action of heating catalysis to generate capsaicin resin monomer: adding capsaicin, formaldehyde and a catalyst 1 into a three-neck flask with a thermometer and a stirring device according to a formula, placing the three-neck flask into a water bath kettle, adding the three-neck flask into the water bath kettle, heating to 50 ℃, keeping the temperature for reaction for 24 hours, and then cooling to stop the reaction. And (3) pickling the product with 20% acetic acid for 2 times, extracting with diethyl ether, mixing the extracted upper layers, evaporating the mixture with a liquid rotary evaporator to remove diethyl ether until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain the capsaicin resin monomer.
Step (2); phenol and formaldehyde react under the action of heating catalysis to generate phenolic resin: adding phenol, formaldehyde and a catalyst 2 into a four-neck flask with a thermometer, a condenser pipe and a stirring device according to the formula amount, heating in a water bath kettle, keeping the temperature for reaction for 2-3 h when the temperature is increased to 90 ℃, then cooling, and stopping the reaction. Vacuum dehydrating the product to obtain phenolic resin, wherein the operation conditions are as follows: the evaporating temperature is 55 ℃, the vacuum degree is 0.085MPa, and the single-stage evaporation is carried out.
Step (3); taking 30g of capsaicin resin monomer and 100g of phenolic resin prepared by the experiment, adding 2g of catalyst 3, heating to 10 ℃, keeping the temperature for reaction for 5 hours, cooling to 30 ℃, stopping the reaction, and adding the solvent and the additive according to the formula.
Example 2
The raw material formula is shown in the table:
step (1); the capsaicin reacts with formaldehyde under the action of heating catalysis to generate capsaicin resin monomer: adding capsaicin, formaldehyde and a catalyst 1 into a three-neck flask with a thermometer and a stirring device according to a formula, placing the three-neck flask into a water bath kettle, adding the three-neck flask into the water bath kettle, heating to 50 ℃, keeping the temperature for reaction for 24 hours, and then cooling to stop the reaction. And (3) pickling the product with 20% acetic acid for 2 times, extracting with diethyl ether, mixing the extracted upper layers, evaporating the mixture with a liquid rotary evaporator to remove diethyl ether until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain the capsaicin resin monomer.
Step (2); phenol and formaldehyde react under the action of heating catalysis to generate phenolic resin: adding phenol, formaldehyde and a catalyst 2 into a four-neck flask with a thermometer, a condenser pipe and a stirring device according to the formula amount, heating in a water bath kettle, keeping the temperature for reaction for 2-3 h when the temperature is increased to 90 ℃, then cooling, and stopping the reaction. Vacuum dehydrating the product to obtain phenolic resin, wherein the operation conditions are as follows: the evaporating temperature is 55 ℃, the vacuum degree is 0.085MPa, and the single-stage evaporation is carried out.
Step (3); taking 30g of capsaicin resin monomer and 100g of phenolic resin prepared by the experiment, adding 3g of catalyst 3, heating to 10 ℃, keeping the temperature for reaction for 5 hours, cooling to 30 ℃, stopping the reaction, and adding the solvent and the additive according to the formula.
Example 3
The raw material formula is shown in the table:
step (1); the capsaicin reacts with formaldehyde under the action of heating catalysis to generate capsaicin resin monomer: adding capsaicin, formaldehyde and a catalyst 1 into a three-neck flask with a thermometer and a stirring device according to a formula, placing the three-neck flask into a water bath kettle, adding the three-neck flask into the water bath kettle, heating to 50 ℃, keeping the temperature for reaction for 24 hours, and then cooling to stop the reaction. And (3) pickling the product with 20% acetic acid for 2 times, extracting with diethyl ether, mixing the extracted upper layers, evaporating the mixture with a liquid rotary evaporator to remove diethyl ether until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain the capsaicin resin monomer.
Step (2); phenol and formaldehyde react under the action of heating catalysis to generate phenolic resin: adding phenol, formaldehyde and a catalyst 2 into a four-neck flask with a thermometer, a condenser pipe and a stirring device according to the formula amount, heating in a water bath kettle, keeping the temperature for reaction for 2-3 h when the temperature is increased to 90 ℃, then cooling, and stopping the reaction. Vacuum dehydrating the product to obtain phenolic resin, wherein the operation conditions are as follows: the evaporating temperature is 55 ℃, the vacuum degree is 0.085MPa, and the single-stage evaporation is carried out.
Step (3); taking 30g of capsaicin resin monomer and 100g of phenolic resin prepared by the experiment, adding 2g of catalyst 3, heating to 10 ℃, keeping the temperature for reaction for 5 hours, cooling to 30 ℃, stopping the reaction, and adding the solvent and the additive according to the formula.
Example 4
The raw material formula is shown in the table:
step (1); the capsaicin reacts with formaldehyde under the action of heating catalysis to generate capsaicin resin monomer: adding capsaicin, formaldehyde and a catalyst 1 into a three-neck flask with a thermometer and a stirring device according to a formula, placing the three-neck flask into a water bath kettle, adding the three-neck flask into the water bath kettle, heating to 50 ℃, keeping the temperature for reaction for 24 hours, and then cooling to stop the reaction. And (3) pickling the product with 20% acetic acid for 2 times, extracting with diethyl ether, mixing the extracted upper layers, evaporating the mixture with a liquid rotary evaporator to remove diethyl ether until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain the capsaicin resin monomer.
Step (2); phenol and formaldehyde react under the action of heating catalysis to generate phenolic resin: adding phenol, formaldehyde and a catalyst 2 into a four-neck flask with a thermometer, a condenser pipe and a stirring device according to the formula amount, heating in a water bath kettle, keeping the temperature for reaction for 2-3 h when the temperature is increased to 90 ℃, then cooling, and stopping the reaction. Vacuum dehydrating the product to obtain phenolic resin, wherein the operation conditions are as follows: the evaporating temperature is 55 ℃, the vacuum degree is 0.085MPa, and the single-stage evaporation is carried out.
Step (3); taking 30g of capsaicin resin monomer and 100g of phenolic resin prepared by the experiment, adding 3g of catalyst 3, heating to 10 ℃, keeping the temperature for reaction for 5 hours, cooling to 30 ℃, stopping the reaction, and adding the solvent and the additive according to the formula.
In examples 1 to 4 above:
the catalyst 1 is one or more than two of sodium hydroxide, trifluoroacetic acid and zinc oxide.
The catalyst 2 is one or more than two of sodium hydroxide, trifluoroacetic acid, zinc oxide and aluminum oxide.
The catalyst 3 is one or more than two of sodium hydroxide, alumina and cyclopropene.
Comparative example:
the preparation method of the non-modified phenolic resin comprises the following steps:
100g of phenol, 50g of formaldehyde and 1.5g of catalyst 2 are added into a four-neck flask provided with a thermometer, a condenser tube and a stirring device, and the four-neck flask is placed in a water bath kettle for heating, and when the temperature is increased to 90 ℃, the reaction is kept for 2-3 h, then the temperature is reduced, and the reaction is stopped. The product is prepared according to the operation conditions: the evaporation temperature is 55 ℃, the vacuum degree is 0.085MPa, single-stage evaporation and vacuum dehydration are carried out, and the solvent and the additive with the formula amount are added to obtain the non-modified phenolic resin.
The capsaicin-modified phenolic resins prepared in comparative examples and examples 1-4 were sprayed on tinplate, and left at room temperature of 25 ℃ for 7d to obtain paint films with good glossiness and high fullness, and the main properties of the paint films are shown in the following table:
| paint film Properties | Comparative example | Example 1 | Example 2 | Example 3 | Example 4 |
| Surface dry time/h | 2 | 2 | 2 | 2 | 2 |
| Time per hour of drying | 12 | 12 | 12 | 12 | 12 |
| viscosity/mPa.S | 701 | 783 | 771 | 752 | 738 |
| hardness/H | 2 | 3 | 3 | 3 | 3 |
| Flexibility/mm | 1.5 | 2 | 2 | 2 | 2 |
| Cohesiveness/grade | 1 | 1 | 1 | 1 | 1 |
| Impact strength/cm | 44 | 50 | 48 | 48 | 49 |
| Antifouling property | Failure to pass | Qualified product | Qualified product | Qualified product | Qualified product |
| Antibacterial property | Failure to pass | Qualified product | Qualified product | Qualified product | Qualified product |
The materials prepared in examples 1-4 were simple to synthesize, safe to operate, good in gloss and high in fullness.
The main performance table of the through paint film shows that the materials prepared in the examples 1-4 have high viscosity, good hardness, strong flexibility, excellent impact strength and excellent antifouling and antibacterial performances.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention should be made and equivalents should be construed as falling within the scope of the invention.
Claims (10)
1. The preparation method of the capsaicin phenolic resin is characterized by comprising the following steps:
step one, preparation of capsaicin resin monomer
According to capsaicin: formaldehyde: catalyst 1 was 100: 20-100: adding the mixture into a reactor in a mass ratio of 0.05-10.0, controlling the reaction temperature to be 30-100 ℃, preserving the heat for 12-36 h, and cooling to room temperature to obtain a crude capsaicin resin monomer; neutralizing the mixture with acetic acid, extracting the mixture with diethyl ether, combining the diethyl ether extracts with a desiccant, removing diethyl ether on a rotary evaporator until the diethyl ether content is below 0.5%, and cooling to room temperature to obtain capsaicin resin monomer;
step two, preparation of phenolic resin
According to phenol: formaldehyde: catalyst 2 was 100: 20-200: adding the raw materials into a reactor according to the mass ratio of 0.05-10.0, controlling the reaction temperature to be 40-100 ℃, preserving heat for 1-8 h, cooling to room temperature to obtain crude phenolic resin, transferring the crude phenolic resin into a reduced pressure distillation kettle, removing water through reduced pressure distillation under the conditions that the temperature is 40-110 ℃ and the vacuum degree is 0.03-0.09 MPa, until the water content is below 0.5%, and cooling to room temperature to obtain phenolic resin;
step three, phenolic resin modification:
the capsaicin resin monomer obtained in the first step, the phenolic resin obtained in the second step and the catalyst 3 are 25 to 35:100: 0.1-10, adding into a reactor, controlling the temperature to be 80-150 ℃, cooling to 25-40 ℃ for 1-10 hours, adding solvent and additive, and packaging to obtain the product.
2. The method for preparing the capsaicin phenolic resin according to claim 1, wherein the capsaicin has the structural formula:
3. the method for preparing a phenolic resin of capsaicin according to claim 2, wherein in the first step, the drying agent is sodium sulfate Na 2 SO 4 。
4. The method for producing a capsaicin phenolic resin according to claim 3, wherein in the first step, the acetic acid concentration is 15-30% by mass.
5. The process for preparing a phenolic capsaicinoid resin according to claim 4, wherein in the first step, the mixture is neutralized with acetic acid by adding dropwise acetic acid until the pH is 5.
6. The method for producing a capsaicinoid phenolic resin according to claim 5, wherein in the second step, the formaldehyde is present in a concentration of 20 to 40% by mass.
7. The method for preparing a phenolic resin of capsaicin according to claim 6, wherein in step three, the product is dehydrated before being packaged, and the water content is reduced to below 0.5% after dehydration.
8. The method for preparing capsaicin phenolic resin according to claim 7, wherein in the first to third steps, the catalyst 1 is one or more of sodium hydroxide, trifluoroacetic acid and zinc oxide; the catalyst 2 is one or more than two of sodium hydroxide, trifluoroacetic acid and zinc oxide; the catalyst 3 is one or more than two of sodium hydroxide and aluminum oxide;
in the third step, the solvent is one or more of benzene, toluene, xylene, methanol, ethanol and acetone; the additive is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, polyamide, epoxy resin E20, epoxy resin E44, epoxy resin E51, organic tin and tributyl phosphate.
9. A capsaicinoid phenolic resin, characterized in that it is obtained by the preparation process according to any one of claims 1 to 8.
10. The capsaicin phenolic resin as defined in claim 9, applied to marine antifouling paint.
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| WO2009079408A1 (en) * | 2007-12-14 | 2009-06-25 | Sunrez Corporation | Biologically active polymeric compounds, their methods of production and uses thereof |
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| CN105837733A (en) * | 2016-04-19 | 2016-08-10 | 浙江工业大学 | Capsaicin [(12-acryloyl-oxy)-dehydroabietate]-acrylic acid copolymer, and preparation and application thereof |
| CN109370372A (en) * | 2018-09-14 | 2019-02-22 | 广德竹之韵工艺品厂 | A kind of bamboo-root carving antibiotic aging-resistant coating |
| CN110003703A (en) * | 2019-04-25 | 2019-07-12 | 海南大学 | A kind of antifouling microcapsules, preparation method and application |
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