Photo-initiated multicomponent polymerization traceable scale inhibitor and preparation method thereof

Abstract

The preparation method comprises the following steps: adding an organic solvent into a photopolymerization reactor, then adding an acrylic acid derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid and allyl polyethylene glycol into the organic solvent, uniformly stirring, adding an initiator, stirring, adding an initiator, adding an initiator, stirring, adding an initiator, stirring, adding an initiator, and carrying out a reaction for 2-4 hours at the temperature of 60-80 DEG C, so as to obtain the light-induced multi-component polymerization traceable scale inhibitor, namely the light-induced multi-component polymerization traceable scale inhibitor, namely the light-induced multi-component polymerization traceable scale inhibitor, namely the light-induced multi-component polymerization traceable scale inhibitor. Then adding a photopolymerization initiator, and carrying out a first polymerization reaction to obtain an intermediate; and adding an N-allyl-4-alkoxy-1, 8-naphthalimide derivative into the intermediate, and carrying out a second polymerization reaction to obtain the product. The photo-initiation multi-component polymerization traceable scale inhibitor solves the problems that an existing scale inhibitor is poor in scale inhibition effect, single in function and low in temperature resistance and salt resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of traceable scale inhibitors, and relates to a photoinitiated multi-component polymerizable traceable scale inhibitor. The present invention also relates to a preparation method of the scale inhibitor. Background Art

[0002] With the continuous advancement of secondary and tertiary oil and gas recovery technologies, the water cut is continuously increasing. At the same time, water injection for oil and gas production technologies are also widely used. Due to factors such as the incompatibility between water qualities and the thermodynamic changes during the flow of water, scale formation is likely to occur. In severe cases, pipeline blockage may occur, affecting the normal production of oil and gas fields. It is necessary to take measures to remove scale by unblocking, which seriously shortens the production cycle of oil and gas fields.

[0003] To solve the scale formation problem and extend the normal operation time of oil and gas pipelines, most oil and gas fields adopt the method of adding scale inhibitors to prevent scale, thereby preventing the large deposition of inorganic scale and extending the normal production cycle of oil and gas fields. Currently, the more commonly used types of scale inhibitors include organic phosphonic acids, polyepoxysuccinic acid or polyamino acid-based, and organic acid multi-component polymerizable scale inhibitors, etc. However, since organic phosphonic acids contain phosphorus and do not meet environmental protection requirements, their application is less; for polyepoxysuccinic acid or polyamino acid-based, the scale inhibition effect on barium sulfate is poor; currently, the more commonly used is organic acid multi-component polymerizable scale inhibitors, but such scale inhibitors have a single function. Due to the differences in polymerization monomers, the scale inhibition performance is also different. And due to the limitations of conditions such as high salinity and high concentration of scale-forming ions in the water quality of individual oil fields, most scale inhibitors have poor temperature and salt resistance and are difficult to achieve good scale inhibition effects. Summary of the Invention

[0004] The purpose of the present invention is to provide a photoinitiated multi-component polymerizable traceable scale inhibitor, which solves the problems of poor scale inhibition effect, single function, and poor temperature and salt resistance of existing scale inhibitors.

[0005] Another purpose of the present invention is to provide a preparation method of the scale inhibitor.

[0006] The technical solution adopted by the present invention, a photoinitiated multi-component polymerizable traceable scale inhibitor, has a structural general formula as shown in Formula 1:

[0007]

[0008] In the formula, R is -H, -CH 3 or -CH 2 CH 3 ; R1 is -OCH 3 or -OC 2 H 5; the value of a is an integer in the range of 150 to 200; the value of b is an integer in the range of 200 to 300; the value of c is an integer in the range of 100 to 150; d is an integer in the range of 30 to 60; the value of e is an integer in the range of 10 to 15; f is an integer in the range of 5 to 10.

[0009] Another technical solution adopted by the present invention is a preparation method of a photoinitiated multi-component polymerizable tracable scale inhibitor, and the steps are as follows:

[0010] Step 1: Add an organic solvent to a photopolymerization reactor, then add an acrylic acid derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol to the organic solvent, stir evenly, then add a photopolymerization initiator, and perform a first polymerization reaction after stirring to obtain an intermediate;

[0011] Step 2: Add an N-allyl-4-alkoxy-1,8-naphthalimide derivative to the intermediate obtained in Step 1 to perform a second polymerization reaction, and thus obtain a photoinitiated multi-component polymerizable tracable scale inhibitor having the structural formula shown in Formula 1:

[0012]

[0013] In the formula, R is -H, -CH 3 or -CH 2 CH 3 ; R1 is -OCH 3 or -OC 2 H 5 ; the value of a is an integer in the range of 150 to 200; the value of b is an integer in the range of 200 to 300; the value of c is an integer in the range of 100 to 150; d is an integer in the range of 30 to 60; the value of e is an integer in the range of 10 to 15; f is an integer in the range of 5 to 10.

[0014] The features of the present invention further lie in:

[0015] The general structural formula of the acrylic acid derivative in Step 1 is shown in Formula 2:

[0016]

[0017] In the formula, R is -H, -CH 3 or -CH 2 CH 3 .

[0018] Taking the acrylic acid derivative as the basic component, the molar ratio of the acrylic acid derivative to maleic acid in Step 1 is 1:1.5 to 2, the molar ratio of the acrylic acid derivative to 2-acrylamido-2-methylpropanesulfonic acid is 1:0.5 to 1, and the molar ratio of the acrylic acid derivative to allyl polyethylene glycol is 1:0.2 to 0.3.

[0019] In Step 1, the organic solvent is any one of isopropanol, ethanol or dimethylformamide; the mass of the organic solvent is 1 to 1.5 times the total mass of the acrylic derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid and allyl polyethylene glycol.

[0020] In Step 1, the photoinitiator is any one of benzoin, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether or benzoin butyl ether, and the mass of the photoinitiator is 0.1% to 0.2% of the total mass of the acrylic derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid and allyl polyethylene glycol.

[0021] In Step 2, the molar ratio of the N-allyl-4-alkoxy-1,8-naphthalimide derivative to the acrylic derivative is 1:0.05 to 0.1.

[0022] In Step 2, the general structural formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is shown in Formula 3:

[0023]

[0024] In the formula, R is -OCH 3 or -OCH 2 CH 3 .

[0025] The first polymerization reaction process is as follows: it is carried out in a photo-polymerization reactor equipped with ultraviolet light, reacts at room temperature, is stirred throughout the reaction process, the stirring rate is 100 to 120 r / min, the ultraviolet wavelength is 360 to 420 nm, and the time is 3 to 4 h.

[0026] The second polymerization reaction process is as follows: it is carried out in a photo-polymerization reactor equipped with ultraviolet light, reacts at room temperature, is stirred throughout the reaction process, the stirring rate is 100 to 120 r / min, the ultraviolet wavelength is 360 to 420 nm, and the reaction time is 2 to 3 h.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The scale inhibitor of the present invention is a five-component copolymer, which has good chelating scale inhibition ability for inorganic scales such as calcium carbonate, calcium sulfate and barium sulfate. The scale inhibitor has a wide application range, good temperature and salt resistance, and strong dispersion ability. By copolymerizing with fluorescent substances, the polymer itself has fluorescence characteristics. According to the linear relationship between the polymer concentration and the fluorescence intensity, quantitative tracer analysis of the application process of the scale inhibitor can be realized;

[0029] 2. The scale inhibitor of the present invention is copolymerized from a variety of polymerization monomers, which can produce a good chelating effect with metal ions. And the multi-component polymerization of the scale inhibitor molecules is carried out by photopolymerization. Compared with the traditional thermal polymerization reaction, it has the characteristics of mild reaction rate, controllable reaction and easy operation. Detailed Embodiments

[0030] The present invention will be described in detail below in conjunction with the specific embodiments.

[0031] The structural general formula of the traceable scale inhibitor by photo-initiated multi-component polymerization of the present invention is shown in Formula 1:

[0032]

[0033] In the formula, R is -H, -CH 3 or -CH 2 CH 3 ; R1 is -OCH 3 or -OC 2 H 5 ; the value of a is an integer between 150 and 200; the value of b is an integer between 200 and 300; the value of c is an integer between 100 and 150; d is an integer between 30 and 60; the value of e is an integer between 10 and 15; the value of f is an integer between 5 and 10.

[0034] The preparation method of the traceable scale inhibitor by photo-initiated multi-component polymerization of the present invention is as follows:

[0035] Step 1: Add an organic solvent to a photopolymerization reactor equipped with ultraviolet light, then add an acrylic derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol to the organic solvent, stir evenly, and then add a photopolymerization initiator to carry out the first polymerization reaction to obtain an intermediate. The reaction formula is as follows in Formula 4:

[0036]

[0037] Among them, taking the acrylic derivative as the basic component, the molar ratio of the acrylic derivative to maleic acid is 1:1.5 - 2, the molar ratio of the acrylic derivative to 2-acrylamido-2-methylpropanesulfonic acid is 1:0.5 - 1, the molar ratio of the acrylic derivative to allyl polyethylene glycol is 1:0.2 - 0.3, and the general formula of the acrylic derivative is as follows in Formula:

[0038]

[0039] In the formula, R is -H, -CH 3 or -CH 2 CH 3 .

[0040] The organic solvent is any one of isopropanol, ethanol, and dimethylformamide, and the mass of the organic solvent is 1 to 1.5 times the total mass of the acrylic derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol.

[0041] The photoinitiator is any one of benzoin, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether. The mass of the photoinitiator is 0.1 to 0.2% of the total mass of the acrylic derivative, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Among them, the first polymerization process is as follows: stirring is carried out throughout the reaction process, the stirring rate is 100 to 120 r / min, the ultraviolet wavelength is 360 to 420 nm, and the first polymerization reaction time is 3 to 4 h.

[0042] Step 2: Add N-allyl-4-alkoxy-1,8-naphthalimide derivative to the intermediate for the second polymerization reaction to obtain the photoinitiating multi-polymerization tracable scale inhibitor. The reaction formula is as shown in Formula 5 below:

[0043]

[0044] In the formula, R is -H, -CH 3 or -CH 2 CH 3 ; R1 is -OCH 3 or -OC 2 H 5 ; the value of a is an integer between 150 and 200; the value of b is an integer between 200 and 300; the value of c is an integer between 100 and 150; d is an integer between 30 and 60; the value of e is an integer between 10 and 15; the value of f is an integer between 5 and 10.

[0045] Among them, the molar ratio of N-allyl-4-alkoxy-1,8-naphthalimide derivative to acrylic derivative is 1:0.05 to 0.1. The structural general formula of N-allyl-4-alkoxy-1,8-naphthalimide derivative is as shown in Formula 3:

[0046]

[0047] In the formula, R1 is -OCH 3 or -OCH 2 CH 3 .

[0048] The second polymerization reaction process is as follows: reaction at room temperature, stirring is carried out throughout the reaction process, the stirring rate is 100 to 120 r / min, the ultraviolet wavelength is 360 to 420 nm, and the second polymerization reaction time is 2 to 3 h.

[0049] The scale inhibitor of the present invention is copolymerized from a variety of polymerization monomers, which can have a good chelating effect with metal ions. It has multiple carboxyl groups in the molecule and dissociates into multiple negative ions in water, which can make the surface of inorganic scale particles negatively charged, increasing the repulsive force between scale particles and playing a good dispersing role. In addition, sulfonic acid groups are introduced into the polymer molecule, enhancing the salt resistance and temperature resistance of the scale inhibitor molecule. Allyl polyethylene glycol is used as a polymerization monomer, and the polyethylene glycol structure can make the formed polymer have stronger dispersibility and solubility.

[0050] N-allyl-4-alkoxy-1,8-naphthalimide derivatives as polymerization monomers can endow the polymer with fluorescence properties. Through the linear relationship between the polymer concentration and fluorescence intensity, quantitative tracer analysis of the application process of the scale inhibitor can be realized. In addition, N-allyl-4-alkoxy-1,8-naphthalimide derivatives will produce fluorescence under ultraviolet light irradiation, enhancing the self-light intensity in the reaction system, which is beneficial to promoting the forward progress of the photopolymerization reaction. Secondly, photopolymerization is used for the multi-component polymerization of scale inhibitor molecules. Compared with the traditional thermal polymerization reaction, it has the characteristics of mild reaction rate, controllable reaction and easy operation.

[0051] Example 1

[0052] Add the solvent isopropyl alcohol to the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol in a molar ratio of 1:1.5:0.5:0.2. The mass of the organic solvent isopropyl alcohol is equal to the sum of the masses of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature, and after mixing evenly, add benzoin dimethyl ether accounting for 0.1% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 360 nm, and stir and react at room temperature for 3 h. The stirring rate is 100 r / min;

[0053] Continue to add N-allyl-4-alkoxy-1,8-naphthalimide derivatives with a molar ratio of 1:0.05 to acrylic acid, and continue to react under ultraviolet light irradiation for 2 h to obtain the final reaction product. The structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is shown in Formula 6:

[0054]

[0055] Example 2

[0056] Add the solvent dimethylformamide to the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol in a molar ratio of 1:2:1:0.3. The mass of the organic solvent dimethylformamide is 1.5 times the total mass of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature. After mixing evenly, add benzoin dimethyl ether accounting for 0.2% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 420 nm, and stir and react at room temperature for 4 h. The stirring rate is 120 r / min;

[0057] Continue to add an N-allyl-4-alkoxy-1,8-naphthalimide derivative with a molar ratio of 1:0.1 to acrylic acid, and continue to react under ultraviolet light for 3 h to obtain the final reaction product. The structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is as shown in Formula 6:

[0058]

[0059] Example 3

[0060] Add the solvent isopropanol to the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol in a molar ratio of 1:2:0.8:0.25. The mass of the organic solvent isopropanol is 1.2 times the total mass of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature. After mixing evenly, add benzoin accounting for 0.15% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 400 nm, and stir and react at room temperature for 3.5 h. The stirring rate is 110 r / min;

[0061] Continue to add an N-allyl-4-alkoxy-1,8-naphthalimide derivative with a molar ratio of 1:0.08 to acrylic acid, and continue to react under ultraviolet light for 2.5 h to obtain the final reaction product. The structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is as shown in Formula 6:

[0062]

[0063] Example 4

[0064] Add isopropyl alcohol as the solvent into the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol with a molar ratio of 1:1.8:1:0.2. The mass of the organic solvent isopropyl alcohol is 1 times the total mass of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature. After mixing evenly, add isopropyl benzoin ether accounting for 0.1% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 380 nm, and stir and react at room temperature for 4 h with a stirring rate of 120 r / min;

[0065] Continue to add an N-allyl-4-alkoxy-1,8-naphthalimide derivative with a molar ratio of 1:0.05 to acrylic acid, and continue to react under ultraviolet light for 2 h to obtain the final reaction product. The structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is as shown in Formula 6:

[0066]

[0067] Example 5

[0068] Add isopropyl alcohol as the solvent into the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol with a molar ratio of 1:2:0.7:0.3. The mass of the organic solvent isopropyl alcohol is 1.1 times the total mass of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature. After mixing evenly, add butyl benzoin ether accounting for 0.2% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 420 nm, and stir and react at room temperature for 4 h with a stirring rate of 120 r / min;

[0069] Continue to add an N-allyl-4-alkoxy-1,8-naphthalimide derivative with a molar ratio of 1:0.1 to acrylic acid, and continue to react under ultraviolet light for 3 h to obtain the final reaction product. The structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is as shown in Formula 6:

[0070]

[0071] Example 6

[0072] Add isopropyl alcohol as the solvent to the photopolymerization reactor, and then add acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol in a molar ratio of 1:1.5:1:0.3. The mass of the organic solvent isopropyl alcohol is 1.5 times the total mass of acrylic acid, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol. Stir at room temperature. After mixing evenly, add benzoin dimethyl ether accounting for 0.2% of the total mass of the reaction monomers, and turn on the ultraviolet light source. Set the ultraviolet wavelength at 390 nm, and stir and react at room temperature for 4 h with a stirring rate of 110 r / min;

[0073] Continue to add an N-allyl-4-alkoxy-1,8-naphthalimide derivative with a molar ratio of 1:0.1 to acrylic acid, and continue to react under ultraviolet light irradiation for 2 h to obtain the final reaction product, where the structural general formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative is shown in Formula 6:

[0074]

[0075] Example 7

[0076] The preparation process of the scale inhibitor is the same as that of Example 1, except that the organic reaction solvent is changed from isopropyl alcohol to ethanol.

[0077] Example 8

[0078] The preparation process of the scale inhibitor is the same as that of Example 1, except that the photoinitiator is changed from benzoin dimethyl ether to benzoin ethyl ether.

[0079] Example 9

[0080] The preparation process of the scale inhibitor is the same as that of Example 1, except that the acrylic acid derivative is changed to methacrylic acid.

[0081] Example 10

[0082] The preparation process of the scale inhibitor is the same as that of Example 1, except that the polymerization monomer, that is, the N-allyl-4-alkoxy-1,8-naphthalimide derivative is changed from

[0083] Comparative Example 1

[0084] Prepare the scale inhibitor according to the method of Example 1, except that allyl polyethylene glycol is not added.

[0085] Comparative Example 2

[0086] Prepare the scale inhibitor according to the method of Example 1, except that 2-acrylamido-2-methylpropanesulfonic acid is not added.

[0087] Comparative Example 3

[0088] The scale inhibitor was prepared according to the method of Example 1, except that maleic acid was not added.

[0089] Comparative Example 4

[0090] The scale inhibitor was prepared by a thermal polymerization method, and there was no and the photoinitiator was replaced with a thermal polymerization initiator.

[0091] Under the same conditions, the scale inhibition rates of the scale inhibitors prepared in Examples 1 to 10 and Comparative Examples 1 to 4 were tested for three different components of calcium carbonate, calcium sulfate and barium sulfate respectively. The scale inhibition rate test results are shown in Table 1 below:

[0092] Table 1 Scale Inhibition Test Results

[0093]

[0094]

[0095] It can be seen from the above table that: the scale inhibitor is a five - element copolymer, which has good chelating scale inhibition ability for inorganic scales such as calcium carbonate, calcium sulfate and barium sulfate, and can reach more than 90%. The scale inhibitor has a wide application range, good temperature and salt resistance, and strong dispersion ability. By copolymerizing with fluorescent substances, the polymer itself has fluorescence characteristics. According to the linear relationship between the polymer concentration and the fluorescence intensity, quantitative tracer analysis of the application process of the scale inhibitor can be realized.

Claims

1. A light-initiated multi-polymer traceable antiscalant, characterized in that: Its general structure is shown in Formula 1: In the formula, R is -H, -CH3 or -CH2CH3; R1 is -OCH3 or -OC2H5; the value of a is an integer between 150 and 200; the value of b is an integer between 200 and 300; the value of c is an integer between 100 and 150; d is an integer between 30 and 60; the value of e is an integer between 10 and 15; and f is an integer between 5 and 10.

2. The method for preparing the scale inhibitor according to claim 1, characterized in that: Here are the steps: Step 1: adding an organic solvent to a photopolymerization reactor, then adding acrylic acid derivatives, maleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and allyl polyethylene glycol to the organic solvent, stirring evenly, and then adding a photopolymerization initiator, stirring, and performing a first polymerization reaction to obtain an intermediate; Step 2: Add N-allyl-4-alkoxy-1,8-naphthalimide derivative to the intermediate obtained in step 1 to carry out a second polymerization reaction, thereby obtaining a light-initiated multi-polymer traceable antiscalant having a structural formula as shown in Formula 1: In the formula, R is -H, -CH3 or -CH2CH3; R1 is -OCH3 or -OC2H5; the value of a is an integer of 150 to 200; the value of b is an integer of 200 to 300; the value of c is an integer of 100 to 150; d is an integer of 30 to 60; the value of e is an integer of 10 to 15; and f is an integer of 5 to 10.

3. The preparation method according to claim 2, characterized in that: The general structural formula of the acrylic acid derivative in step 1 is shown in Formula 2: Wherein, R is -H, -CH3 or -CH2CH3.

4. The preparation method according to claim 2 or 3, characterized in that: Taking acrylic acid derivatives as the basic components, the molar ratio of acrylic acid derivatives to maleic acid in step 1 is 1:1.5-2, the molar ratio of acrylic acid derivatives to 2-acrylamido-2-methylpropanesulfonic acid is 1:0.5-1, and the molar ratio of acrylic acid derivatives to allyl polyethylene glycol is 1:0.2-0.

3.

5. The preparation method according to claim 2, characterized in that: The organic solvent in step 1 is any one of isopropanol, ethanol or dimethylformamide; the mass of the organic solvent is 1 to 1.5 times the total mass of acrylic acid derivatives, maleic acid, 2-acrylamido-2-methylpropane sulfonic acid and allyl polyethylene glycol.

6. The preparation method according to claim 2, characterized in that: In step 1, the photopolymerization initiator is any one of benzoin, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether or benzoin butyl ether, and the mass of the photopolymerization initiator is 0.1% to 0.2% of the total mass of acrylic acid derivatives, maleic acid, 2-acrylamido-2-methylpropane sulfonic acid and allyl polyethylene glycol.

7. The preparation method according to claim 2, characterized in that: In the step 2, the molar ratio of the N-allyl-4-alkoxy-1,8-naphthalimide derivative to the acrylic acid derivative is 1:0.05-0.

1.

8. The preparation method according to claim 2 or 7, characterized in that ,, the general structural formula of the N-allyl-4-alkoxy-1,8-naphthalimide derivative in step 2 is shown in Formula 3: Wherein, R is -OCH3 or -OCH2CH3.

9. The preparation method according to claim 2, characterized in that: The first polymerization reaction process is: carried out in a photopolymerization reactor equipped with ultraviolet light, reacting at room temperature, stirring throughout the reaction process, the stirring rate is 100-120r / min, the ultraviolet wavelength is 360-420nm, and the reaction time is 3-4h.

10. The preparation method according to claim 2, characterized in that: The second polymerization reaction process is: carried out in a photopolymerization reactor equipped with ultraviolet light, reacting at room temperature, stirring throughout the reaction process, the stirring rate is 100-120r / min, the ultraviolet wavelength is 360-420nm, and the reaction time is 2-3h.

Images