A tertiary amine type polyurethane modified light-curing silicone oil and preparation method thereof

Abstract

The present invention discloses a tertiary amine type polyurethane modified light-curing silicone oil and a preparation method thereof. The tertiary amine type polyurethane modified light-curing silicone oil is prepared by reacting epoxy polyether block silicone oil with a compound containing a secondary amine group, then adding diisocyanate and polyether polyol for stepwise polymerization, and finally adding a hydroxy acrylic acid derivative for end-capping to obtain the tertiary amine type polyurethane modified light-curing silicone oil. The tertiary amine type polyurethane modified light-curing silicone oil provided by the present invention combines the advantages of acrylate modified silicone oil and polyurethane, has good substrate anchoring, and the introduction of the tertiary amine structure can promote light-curing activity and play an anti-oxidation and anti-polymerization role.

Description

Technical Field

[0001] The invention relates to the technical field of photocuring, and in particular to a tertiary amine type polyurethane modified photocuring silicone oil and a preparation method thereof. Background Art

[0002] As a new type of photocurable material, acrylic modified silicone oil has broad application prospects in the field of coatings and can be applied to paper, wood, plastic, metal, stone, glass, ceramic, and especially leather surfaces. At present, researchers are constantly exploring new preparation methods and technologies to improve the performance and quality of products. For example, by optimizing reaction conditions, improving formula design, introducing new functional groups and other methods, the flexibility, hydrophobicity, isolation and other properties of acrylic modified silicone oil can be further improved. The introduction of polyurethane segments is one of the methods. The introduction of polyurethane segments can effectively reduce the volume shrinkage of the material and solve the problem of shrinkage and deformation that acrylic esters are prone to during the curing process, thereby ensuring the stability and dimensional accuracy of the material during use. At the same time, this improvement significantly enhances the adhesion to the base material, allowing it to be more firmly combined in various application scenarios, not easy to fall off or peel off, greatly improving the reliability and durability of the material, and laying a solid foundation for its wide application in many fields.

[0003] Generally, alkylhydroxy silicone oil, i.e. hydroxypropyl silicone oil, is used as the raw material, and polyurethane modified acrylic silicone oil can be obtained by reacting with isocyanate and polyol, as well as hydroxy acrylate compounds. CN 111138966 obtains a solvent-free UV ultra-flexible light-curing coating by self-synthesizing polybutadiene polyurethane acrylate, alkylhydroxy silicone oil modified acrylate and other UV oligomers, and adding modified epoxy acrylate, which effectively increases the flexibility of the coating, and at the same time increases the water resistance and heat resistance of the coating, but the molecular weight and specific structure of the dialkyl silicone oil involved are not described.

[0004] Photoinitiator is a key component of photocuring system, especially hydrogen abstraction type photoinitiator is widely used because of its good surface curing, good solubility and low price. However, this type of photoinitiator needs to be used in combination with amine co-initiator to improve the effect. However, amine co-initiators have toxicity and carcinogenicity problems, and are easy to react with oxidizing substances when combined with benzophenone photoinitiators, resulting in a darkening of the color of the photocured film, i.e. yellowing. CN112852284 uses dioxathiolane with a double bond in the side chain as a hydrogen donor for benzophenone photoinitiators, which effectively solves the problem that amine co-initiators have toxicity and carcinogenicity, and are easy to cause yellowing of the cured film.

[0005] In the application of photocurable release film, CN 116769211 relates to a method for preparing a release agent for a photocurable release film with low volume shrinkage and aging resistance, in which a disulfide-bonded silicone oligomer is used, and a fluorine-containing chain segment is introduced to reduce the surface free energy, thereby obtaining excellent weather resistance and waterproof performance. In addition, CN202110710744.2 uses epoxy silicone oligomers with active diluents and photoinitiators to prepare the UV-curable silicone release agent, which can avoid the problem of shrinkage, but the cationic photocuring type has a dark reaction and has a narrow adaptability to the substrate. Summary of the invention

[0006] In view of the problems of poor anchoring, severe silicon transfer, oxygen inhibition, etc. in the existing photocurable release silicone oil, one of the purposes of the present invention is to provide a tertiary amine type polyurethane modified photocurable silicone oil, which improves the anchoring property of the photocurable silicone oil by introducing tertiary amine groups and the synergistic effect of polyurethane segments, reduces the silicon transfer problem, and has certain anti-oxygen inhibition performance.

[0007] The second object of the present invention is to provide a method for preparing tertiary amine type polyurethane modified light-curing silicone oil.

[0008] One of the purposes of the present invention is achieved through the following technical scheme: a tertiary amine type polyurethane modified light-curing silicone oil is obtained by reacting epoxy polyether block silicone oil with a compound containing a secondary amine group, then adding diisocyanate and polyether polyol for stepwise polymerization, and finally adding a hydroxy acrylic acid derivative for end-capping.

[0009] Among them, the structural formula of epoxy polyether silicone oil is:

[0010]

[0011] Wherein x is an integer, x=10 to 300;

[0012]

[0013] Wherein, p+q=1-50, and p and q are both integers.

[0014] The secondary amine-containing compound has the general structural formula shown in the following (III):

[0015]

[0016] Wherein, in formula (II), R1 is an alkyl chain or a branched alkyl chain, or contains -NH2, or -OH group, and has 1 to 5 carbon atoms.

[0017] The second object of the present invention is achieved by the following technical solution: The preparation method of the above-mentioned tertiary amine type polyurethane modified light-curing silicone oil comprises the following steps:

[0018] 1) Add epoxy-terminated polyether silicone oil to a reaction device, then dropwise add a secondary amine compound, stir and react at 60-100° C. for 3-8 hours, and add a neutralizing agent to obtain a polyether silicone oil containing a tertiary amine structure;

[0019] 2) Add diisocyanate, solvent, polyether polyol and catalyst to the polyether silicone oil containing tertiary amine structure in step 1), stir and react at 25-100° C. for 5-12 hours, then add hydroxy acrylic acid derivative and inhibitor, continue to react until NCO reaction is complete, vacuum remove solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0020] In step 1), the amount of the epoxy-terminated polyether silicone oil is 100 parts; the amount of the secondary amine used is twice the molar number of the epoxy polyether silicone oil.

[0021] In step 1), the epoxy polyether silicone oil structural formula is:

[0022]

[0023] Wherein x is an integer, x=10 to 300;

[0024]

[0025] Wherein, p+q=1-50, p and q are both integers;

[0026] The secondary amine-containing compound has the general structural formula shown in the following (III):

[0027]

[0028] Wherein, in formula (II), R1 is an alkyl chain or a branched alkyl chain, or contains -NH2, or -OH group, and has a carbon number of 1 to 5; the amount of secondary amine used is twice the molar number of epoxy polyether silicone oil.

[0029] The neutralizing agent is selected from one of formic acid, acetic acid, propionic acid and lauric acid, and is 100%-110% of the molar number of the secondary amine compound.

[0030] In step 2), 1-50 parts of diisocyanate, 30-100 parts of solvent and 3-30 parts of polyether diol are added to the polyether silicone oil containing a tertiary amine structure.

[0031] The diisocyanate is selected from one or a combination of not less than two of isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), xylene diisocyanate (MDI), xylylene diisocyanate (XDI) or toluene diisocyanate (TDI).

[0032] The solvent is one of toluene, hexane, cyclohexane, acetone, methyl butyl ketone, butanone, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether, propylene glycol dimethyl ether and dipropylene glycol dimethyl ether.

[0033] The catalyst is one of an organic tin catalyst, an organic zinc catalyst and an organic bismuth catalyst, wherein the preferred organic tin catalyst is dibutyltin dilaurate, and the dosage is 0.1-0.5% of the total mass of tertiary amine polyether silicone oil, diisocyanate and polyether.

[0034] The polyether polyol is one or a combination of not less than two of polyethylene glycol, polypropylene glycol or a copolymer of the two and polytetramethylene glycol, and has a molecular weight of 200-2000.

[0035] The added amount of the hydroxy acrylic acid derivative is 1-10 parts.

[0036] The hydroxy acrylic acid derivative is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxybutyl acrylate, hydroxyethyl acrylamide, hydroxypropyl methacrylate, hydroxypropyl acrylate and pentaerythritol triacrylate.

[0037] The amount of the polymerization inhibitor is 0.1 to 5% of the mass of the hydroxy acrylic acid derivative.

[0038] The polymerization inhibitor is an alkylphenol, such as 1,4-hydroquinone, p-methoxyphenol, 2,6-di-tert-butylhydroxytoluene, 4,4'-dioxydiphenol, 1,1'-bis(4-hydroxyphenyl)cyclohexane, 3-methyl-4-isopropylphenol, 2,4,5-trihydroxybenzophenone, 2,6-di-tert-butylphenol, 2,5-di-tert-amylhydroquinone, 2,5-di-tert-butylhydroquinone, 4-hydroxymethyl-2,6-di-tert-butylphenol, 2,6-di-tert-butyl-α-dimethyl-p-cresol, 4,4'-bis(2,6-dibutylphenol), 2 , 2'-methylene-bis(4-ethyl-6-tert-butylphenol), 2,2'-methylene-(2,6-di-tert-butylphenol), 4,4'-methylene-(2,6-di-tert-butylphenol), 4,4'-butylene(3-methyl-6-tert-butylphenol), 4,4'-thiobis(6-tert-butyl-3-methylphenol), bis(3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide, 4,4'-thiobis(6-tert-butyl-o-cresol), and 2,2'-thiobis(4-methyl-6-tert-butylphenol).

[0039] Beneficial effects of the present invention:

[0040] The photocurable silicone oil provided by the present invention combines the advantages of acrylate-modified silicone oil and polyurethane-modified silicone oil, has good lubricity and wear resistance, and the introduction of tertiary amine structure can promote photocuring activity and suppress oxygen inhibition problem, and the carbamate structure can improve the anchoring performance on the substrate and improve the residual bonding rate. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific examples, but the present invention is not limited to the following examples. The methods described are conventional methods unless otherwise specified. The materials described can be obtained from public commercial channels unless otherwise specified.

[0042] In the following examples, the epoxy polyether silicone oil structural formula is:

[0043]

[0044] Wherein x is an integer, x=10 to 300;

[0045]

[0046] Wherein, p+q=1-50, p and q are both integers;

[0047] The secondary amine-containing compound has the general structural formula shown in the following (III):

[0048]

[0049] Wherein, in formula (II), R1 is an alkyl chain or a branched alkyl chain, or contains -NH2, or -OH group, and has 1 to 5 carbon atoms.

[0050] Example 1

[0051] 1) 100 g of epoxy-terminated polyether silicone oil (x≈100, p=1, q=0) was added to a four-necked flask equipped with a thermometer and a reflux condenser, and 18.62 g of diethylamine was added under stirring. The mixture was stirred at 60° C. for 3 hours, and 10.2 g of lauric acid and 12.2 g of acetic acid as neutralizing agents were added to obtain a hydroxy-terminated polysiloxane containing a tertiary amine structure.

[0052] 2) Add 40g of isophorone diisocyanate, 30g of solvent dipropylene glycol dimethyl ether, 3g of polyether PEG 200, and 0.1g of catalyst dibutyltin dilaurate, stir and react at 25°C for 5 hours, analyze the residual NCO content by di-n-butylamine method, and when the calculated value is reached, add 10.8g of blocking agent hydroxybutyl acrylate and 0.11g of inhibitor 2,6-di-tert-butylhydroxytoluene, continue the reaction until the NCO reaction is complete, vacuum remove the solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0053] Example 2

[0054] 1) 100 g of epoxy-terminated polyether silicone oil (x≈100, p=25, q=25) was added to a four-necked flask equipped with a thermometer and a reflux condenser, and 6.48 g of diethanolamine was added under stirring. The mixture was stirred at 80° C. for 6 hours, and 1.02 g of acetic acid as a neutralizing agent was added to obtain a hydroxy-terminated polysiloxane containing a tertiary amine structure.

[0055] 2) Add 50g of isocyanate TDI, 60g of solvent toluene, 20g of polyether PEG 600, and 0.2g of catalyst dibutyltin dilaurate, stir and react at 65°C for 6 hours, analyze the residual NCO content by di-n-butylamine method, and add 37.5g of blocking agent hydroxyethyl acrylate and 1.87g of inhibitor 2,6-di-tert-butyl-α-dimethyl-p-cresol after reaching the calculated value, continue the reaction until the NCO reaction is complete, vacuum remove the solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0056] Example 3

[0057] 1) 100 g of epoxy-terminated polyether silicone oil (x≈300, p=5, q=5) was added to a four-necked flask equipped with a thermometer and a reflux condenser, and 0.65 g of diethylamine was added under stirring. The mixture was stirred at 100° C. for 8 hours, and 1.76 g of lauric acid as a neutralizing agent was added to obtain a hydroxy-terminated polysiloxane containing a tertiary amine structure.

[0058] 2) Add 10g of isocyanate TDI, 100g of solvent toluene, 10g of polyether PEG 200, and 0.5g of catalyst dibutyltin dilaurate, stir and react at 100°C for 12 hours, analyze the residual NCO content by di-n-butylamine method, and when the calculated value is reached, add 0.88g of blocking agent hydroxybutyl acrylate and 0.05g of inhibitor 2,6-di-tert-butylhydroxytoluene, continue the reaction until the NCO reaction is complete, vacuum remove the solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0059] Example 4

[0060] 1) 100 g of epoxy-terminated polyether silicone oil (x≈100, p=0, q=10) was added to a four-necked flask equipped with a thermometer and a reflux condenser, and 1.85 g of diethylamine was added under stirring. The mixture was stirred at 80° C. for 6 hours, and 1.86 g of propionic acid as a neutralizing agent was added to obtain a hydroxy-terminated polysiloxane containing a tertiary amine structure.

[0061] 2) Add 20g of isocyanate IPDI, 60g of solvent toluene, 30g of polyether PEG 2000, and 0.2g of catalyst dibutyltin dilaurate, stir and react at 85°C for 8 hours, analyze the residual NCO content by di-n-butylamine method, and add 18g of blocking agent hydroxybutyl acrylate and 0.36g of inhibitor 2,6-di-tert-butylhydroxytoluene after reaching the calculated value, continue the reaction until the NCO reaction is complete, vacuum remove the solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0062] Example 5

[0063] 1) 100 g of epoxy-terminated polyether silicone oil (x≈200, p=1, q=0) was added to a four-necked flask equipped with a thermometer and a reflux condenser, and 1.00 g of diethylamine was added under stirring. The mixture was stirred at 80° C. for 6 hours, and 2.70 g of lauric acid as a neutralizing agent was added to obtain a hydroxy-terminated polysiloxane containing a tertiary amine structure.

[0064] 2) Add 60g of isocyanate MDI, 60g of solvent toluene, 10g of polyether PEG 1000, and 0.1g of catalyst dibutyltin dilaurate, stir and react at 85°C for 8 hours, analyze the residual NCO content by di-n-butylamine method, and when the calculated value is reached, add 64.5g of blocking agent hydroxybutyl acrylate and 0.06g of inhibitor 2,6-di-tert-butylhydroxytoluene, continue the reaction until the NCO reaction is complete, vacuum remove the solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

[0065] Comparative Example 1

[0066] 100 g of terminal hydroxypropyl silicone oil (x≈100) was added to a four-necked flask equipped with a thermometer and a reflux condenser. Under stirring, 20 g of isocyanate IPDI, 60 g of solvent toluene, 30 g of polyether PEG 2000, and 0.2 g of catalyst dibutyltin dilaurate were added. The mixture was stirred and reacted at 85° C. for 8 hours. The residual NCO content was analyzed by the di-n-butylamine method. After reaching the calculated value, 18 g of sealing agent hydroxybutyl acrylate and 0.36 g of inhibitor 2,6-di-tert-butylhydroxytoluene were added. The reaction was continued until the NCO reaction was complete. The solvent was removed by vacuum and the temperature was cooled to room temperature to obtain a polyurethane-modified light-curing polyether silicone oil.

[0067] Comparative Example 2

[0068] 100g of terminal hydroxypropyl silicone oil (x≈100) was added to a four-necked flask equipped with a thermometer and a reflux condenser. Under stirring conditions, 6g of isocyanate IPDI, 60g of solvent toluene, and 0.2g of catalyst dibutyltin dilaurate were added. The mixture was stirred at 85°C for 8 hours. The residual NCO content was analyzed by the di-n-butylamine method. After reaching the calculated value, 4.0g of blocking agent hydroxybutyl acrylate and 0.08g of inhibitor 2,6-di-tert-butylhydroxytoluene were added. The reaction was continued until the NCO reaction was complete. The solvent was removed by vacuum and the temperature was lowered to room temperature to obtain polyurethane-modified light-curing silicone oil.

[0069] Performance Testing

[0070] Take 100 parts of the acrylic modified silicone oil product (model AS 6901) of Guangdong Yongzhuo Technology Co., Ltd., take 10 parts of the photocurable silicone oil in Examples 1 to 5 and Comparative Examples 1 to 2 respectively, add 2 parts of the photoinitiator, stir evenly at room temperature, and then coat it on a clean PET film with a 1.5 μm wire rod, expose it with a UV mercury lamp for different times under nitrogen protection conditions (oxygen content <50 ppm), prepare for performance testing, and compare the curing rate through infrared spectra.

[0071] The room temperature peeling force test method, the residual adhesion rate of the release agent, and the anchoring test method are as follows:

[0072] 1. Test method for release agent's peeling force at room temperature:

[0073] Stick the TESA 7475 tape on the silicon-coated release paper to be tested according to the standard method, cut the tape into long strips according to the shape of the tape, and then press it back and forth three times with a 2kg rubber roller. 2 A standard stainless steel bar is pressed at room temperature for 20 hours and placed at room temperature for 4 hours. It is then tested with a release force testing machine. The tensile speed is 30 cm / min and the tensile angle is 180 degrees. The tensile force is the room temperature peeling force.

[0074] 2. Test method for residual bonding rate of release agent:

[0075] (1) Stick Nitto 31B tape on the silicon-coated release paper to be tested according to the standard method, cut it into long strips according to the shape of the tape, and then press it back and forth three times with a 2kg rubber roller. 2 The standard stainless steel bars were pressed in a 70°C oven for 20 h and then taken out and left to stand for 1 h.

[0076] (2) Remove the Nitto 31B tape from the release paper and stick it on a clean PET film according to the standard method. After 1.5 hours, test it with a release force tester. The tensile force at a tensile speed of 30 cm / min and a tensile angle of 180° is recorded. After repeating the experiment multiple times, the average release force value is calculated and recorded as f2.

[0077] (3) Apply Nitto 31B tape directly to a clean PET film according to the standard method. After 1.5 hours, test it with a peel force tester. The tensile force at a tensile speed of 30 cm / min and a tensile angle of 180° is recorded. After repeating the experiment multiple times, the average peel force value is calculated and recorded as f1.

[0078] (4) Residual bonding rate = f2 / f1×100%.

[0079] 3. Test method for anchorage:

[0080] Place the cured release film flat on a horizontal table, then rub the surface of the release film back and forth at 45 degrees with your index finger for a total of 20 times. If the silicon falls off severely below 20 times, it means the anchoring is poor; if the silicon does not fall off or falls off slightly after 20 times, it means the anchoring is good.

[0081] The performance test results of Examples 1 to 5 and Comparative Examples 1-2 are as follows:

[0082]

[0083] In summary, compared with the blank sample AS 6901 product and the samples of comparative examples 1 and 2, the tertiary amine modified light-curing silicone release films obtained by adding examples 1 to 5 have no silicone rubbed off, and the room temperature peeling force measured by the 180° peeling method is between 10 and 60 g / 25 mm, the residual bonding rate is above 80%, and the degree of curing is high in a short time, which proves that the tertiary amine modified light-curing silicone oil has a good promotion effect and has better anchoring property.

[0084] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A tertiary amine type polyurethane modified light-curing silicone oil, characterized in that: The epoxy polyether block silicone oil is reacted with a compound containing a secondary amine group, and then diisocyanate and polyether polyol are added for stepwise polymerization, and finally a hydroxy acrylic acid derivative is added for end-capping to obtain the product.

2. The tertiary amine type polyurethane modified light-curing silicone oil according to claim 1, characterized in that: The epoxy polyether silicone oil structural formula is: Wherein x is an integer, x=10 to 300; Wherein, p+q=1-50, and p and q are both integers. The secondary amine-containing compound has the general structural formula shown in the following (III): Wherein, in formula (II), R1 is an alkyl chain or a branched alkyl chain, or contains -NH2, or -OH group, and has 1 to 5 carbon atoms.

3. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 1 or 2, characterized in that: The following steps are involved: 1) Add epoxy-terminated polyether silicone oil to a reaction device, then dropwise add a secondary amine compound, stir and react at 60-100° C. for 3-8 hours, and add a neutralizing agent to obtain a polyether silicone oil containing a tertiary amine structure; 2) Add diisocyanate, solvent, polyether polyol and catalyst to the polyether silicone oil containing tertiary amine structure in step 1), stir and react at 25-100° C. for 5-12 hours, then add hydroxy acrylic acid derivative and inhibitor, continue to react until NCO reaction is complete, vacuum remove solvent, cool to room temperature, and obtain tertiary amine type polyurethane modified light-curing silicone oil.

4. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: In the step 1), the amount of the epoxy-terminated polyether silicone oil is 100 parts; the amount of the secondary amine used is twice the molar number of the epoxy polyether silicone oil.

5. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: In the step 1), the epoxy polyether silicone oil has the structural formula: Wherein x is an integer, x=10 to 300; Wherein, p+q=1-50, p and q are both integers; The secondary amine-containing compound has the general structural formula shown in the following (III): Wherein, in formula (II), R1 is an alkyl chain or a branched alkyl chain, or contains -NH2, or -OH group, and has a carbon number of 1 to 5; The neutralizing agent is selected from one of formic acid, acetic acid, propionic acid and lauric acid, and its usage is 100%-110% of the molar number of the secondary amine compound.

6. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: In the step 2), 1-50 parts of diisocyanate, 30-100 parts of solvent and 3-30 parts of polyether diol are added to the polyether silicone oil containing a tertiary amine structure.

7. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: The diisocyanate is selected from one or a combination of not less than two of isophorone diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate or toluene diisocyanate; The solvent is one of toluene, hexane, cyclohexane, acetone, methyl butyl ketone, butanone, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether, propylene glycol dimethyl ether and dipropylene glycol dimethyl ether.

8. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: The catalyst is one of an organic tin catalyst, an organic zinc catalyst and an organic bismuth catalyst, and the amount used is 0.1-0.5% of the total mass of the tertiary amine polyether silicone oil, diisocyanate and polyether polyol.

9. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: The polyether polyol is one or a combination of not less than two of polyethylene glycol, polypropylene glycol or a copolymer of the two and polytetramethylene glycol, and has a molecular weight of 200-2000.

10. The method for preparing the tertiary amine type polyurethane modified light-curing silicone oil according to claim 3, characterized in that: The addition amount of the hydroxy acrylic acid derivative is 1-10 parts; The hydroxy acrylic acid derivative is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxybutyl acrylate, hydroxyethyl acrylamide, hydroxypropyl methacrylate, hydroxypropyl acrylate and pentaerythritol triacrylate; The amount of the polymerization inhibitor is 0.1-5% of the mass of the hydroxy acrylic acid derivative.

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