Preparation method of low-oxygen polymerization inhibition ultraviolet curing organic silica gel

Abstract

The invention provides low-oxygen-inhibition ultraviolet-curing organic silica gel and a preparation method thereof. The organic silica gel comprises the following components: 90-105 parts of acrylic modified silicone oil; 8 to 20 parts of sulfydryl silicone oil; 0.2 to 0.4 part of a photoinitiator A; 0.2 to 1 part of a photoinitiator B; and 1-2 parts of an auxiliary agent. The preparation method comprises the following steps: weighing the acrylic modified silicone oil, the photoinitiator A (thioxanthone initiator) and the photoinitiator B (cracking type initiator) according to the components, stirring and uniformly mixing to obtain a mixed solution; cooling the mixed solution, adding the sulfydryl silicone oil and the auxiliary agent according to the components, and uniformly stirring and mixing to obtain the low-oxygen polymerization inhibition ultraviolet curing organic silica gel. The adhesive can be rapidly cured at normal temperature under irradiation of 365nm wavelength and 30J / cm < 2 > energy, and has excellent surface dryness, high transparency and better strength and adhesive strength; and the cable also has outstanding high and low temperature resistance, moisture resistance, electrical insulation, corrosion resistance and aging resistance.

Description

Technical Field

[0001] The invention belongs to the field of ultraviolet light curing, and in particular relates to a method for preparing low-oxygen inhibition ultraviolet light curing organic silica gel. Background Art

[0002] Organic silica gel is a polymer composed of Si-O-Si bonds. It has low intermolecular forces and a helical structure, which determines that it has many characteristics that are difficult to replace by other similar materials: high and low temperature resistance, moisture resistance, electrical insulation, corrosion resistance, aging resistance, physiological inertness and many other unique properties. Therefore, it is widely used in aerospace, electronics and electrical, light industry, chemical industry, textile, machinery, construction, transportation, energy, medicine and healthcare, agriculture and other fields.

[0003] At present, organosilicon products are mainly produced through silane-hydrogen addition or hydroxyl condensation reactions, but both types of reactions have some unavoidable disadvantages. For example, the addition reaction requires the use of precious metal catalysts, which will be a great cost pressure in industrial production; at the same time, the presence of elements such as N, P, and S will affect the catalytic effect of the catalyst; and the condensation reaction has a long curing time and the catalyst is a heavy metal, which limits its application range. Therefore, it is crucial to find a fast and effective reaction without heavy metal catalysts to prepare organosilicon polymers.

[0004] In the free radical photocuring system, the ground state of general substances is singlet state, while the stable state of oxygen is triplet state, which has two unpaired electrons with the same spin direction. Therefore, it will compete with the polymerization reaction of free radicals and consume free radicals. Oxygen inhibition is mainly manifested in that the bottom layer of the coating is often cured, while the surface is not cured and sticky during the air photocuring process. Oxygen inhibition can eventually lead to the appearance of a large number of oxidative structures such as hydroxyl, carbonyl, and peroxy groups on the surface of the coating, thereby affecting the long-term stability of the coating.

[0005] Existing methods for inhibiting oxygen inhibition include physical methods and chemical methods. Physical methods such as inert gas protection, wax floating, coating, strong light irradiation, step-by-step irradiation, etc., may increase costs and affect the properties of the coating. Chemical methods, on the other hand, can effectively improve oxygen inhibition by adding substances that can provide active hydrogen, such as mercaptans, amines and ethers, but their solubility in the silica gel system is poor, and they will cause yellowing and residue, affecting their final performance.

[0006] The invention mainly uses acrylate-modified silicone oil as the main body, uses the mercapto group in the mercapto silicone oil to provide active hydrogen, and combines a hydrogen abstraction initiator and a free radical polymerization initiator in a suitable proportion to achieve the purpose of suppressing oxygen inhibition, thereby improving the overall curing rate. Summary of the invention

[0007] The purpose of the present invention is to provide a low-oxygen-inhibited UV-curable organic silica gel and a preparation method thereof in view of the problems existing in the prior art. The organic silica gel is mainly prepared by mixing acrylic modified silicone oil, mercapto silicone oil, photoinitiator A, photoinitiator B and auxiliary agents. The effect of inhibiting oxygen inhibition is achieved by using mercapto silicone oil and photoinitiator in combination.

[0008] The purpose of the present invention can be achieved by the following scheme:

[0009] The present invention provides a low-oxygen-inhibited UV-curable organic silica gel, wherein the UV-curable organic silica gel comprises the following components in parts by weight:

[0010]

[0011] The photoinitiator A is a thioxanthone initiator, and the photoinitiator B is a cleavage-type initiator.

[0012] As one embodiment of the present invention, the acrylic modified silicone oil is preferably 98-105 parts, and the mercapto silicone oil is preferably 8-12 parts.

[0013] As an embodiment of the present invention, the acrylic modified silicone oil is a silicone oil containing acrylate groups at the molecular chain end or side group, with a viscosity of 1000-10000mpa.s and a mass content of acrylate groups of 2-6% (acrylate groups account for the total mass ratio). If the viscosity is less than 1000mpa.s and the acrylate content is greater than 6%, the strength of the bulk adhesive will deteriorate and it will be easy to crack; if the viscosity is greater than 10000mpa.s and the acrylate content is less than 2%, the bonding strength will be reduced.

[0014] In the acrylic modified silicone oil used in the present invention, the double bond activity of acrylate is relatively high and can undergo free radical polymerization, and some mercapto groups also add to the double bond of acrylate, so compared with conventional vinyl silicone oil (the double bond activity of vinyl is relatively low and the degree of free radical polymerization is too low), the acrylic modified silicone oil reacts more fully and has better overall performance. The initiator has the same working principle, but the initiators of the related combinations have slightly different effects.

[0015] As an embodiment of the present invention, the mercapto silicone oil is a silicone oil containing mercapto groups at the molecular chain end or side group, with a viscosity of 100-500mpa.s and a mass content of mercapto groups of 1-5% (mercapto groups account for the total mass ratio). If the viscosity is less than 100mpa.s and the mercapto content is greater than 5%, the strength of the bulk adhesive will deteriorate and it will be easy to crack; if the viscosity is greater than 500mpa.s and the mercapto content is less than 1%, the bonding strength will be reduced and the anti-oxidation and polymerization inhibition effect will be poor. If the amount of mercapto silicone oil used is high, the hardness, strength and bonding strength of the organic silica gel will be reduced.

[0016] As an embodiment of the present invention, the photoinitiator A is a medium thioxanthone initiator (hydrogen abstraction type), including: 2-chlorothioxanthone (CTX), 1-chloro-4-propoxythioxanthene-9-one (CPTX), isopropylthioxanthone (ITX), or one or more mixtures thereof.

[0017] As an embodiment of the present invention, the photoinitiator B is a cleavage-type initiator, including: 2-hydroxy-2-methyl-1-phenylpropanone (1173), 1-hydroxycyclohexyl phenyl ketone (184), 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907), 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO), 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester (TPO-L), 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone (659) or a mixture thereof.

[0018] As an embodiment of the present invention, the auxiliary agent includes 3-(acryloxy)methyldimethoxysilane, 3-(acryloxy)propyltrimethoxysilane, 3-(methacryloxy)propylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, γ-methacryloxypropyltri(trimethylsiloxy)silane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropyltriisopropoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, 3-isocyanate A mixture of one or more of propyl triethoxysilane, 3-isocyanate propyl methyl dimethoxy silane, 1,3,5-tris (trimethoxysilyl propyl) isocyanurate, γ-aminopropyl triethoxy silane, γ-aminopropyl trimethoxy silane, γ-aminopropyl methyl diethoxy silane, N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxy silane, N-β-(aminoethyl)-γ-aminopropyl trimethoxy silane, γ-divinyl triaminopropyl trimethoxy silane, 3-ureidopropyl trimethoxy silane, 3-ureidopropyl triethoxy silane, and γ-glycidyl ether oxygen propyl trimethoxy silane.

[0019] The present invention also provides a method for preparing low-oxygen-inhibited ultraviolet-cured organic silica gel, comprising the following steps:

[0020] S1, mixing acrylic modified silicone oil and photoinitiator A, heating and stirring to obtain mixed silicone oil;

[0021] S2, after the mixed silicone oil is cooled, mercapto silicone oil and an auxiliary agent are added and mixed evenly to obtain the UV-curable organic silica gel;

[0022] When the photoinitiator B is in solid state at room temperature (≤25° C.), the photoinitiator B is added in step S1 (mixed with acrylic modified silicone oil and photoinitiator A);

[0023] When the photoinitiator B is in liquid state at room temperature (≤25° C.), the photoinitiator B is added in step S1 and / or step S2 (added together with mercapto silicone oil and an auxiliary agent, or mixed together with acrylic modified silicone oil and photoinitiator A).

[0024] As an embodiment of the present invention, in step S1, the hot stirring is stirring at 60-70°C in the dark.

[0025] As an embodiment of the present invention, in step S2, the temperature is lowered to 10-25° C. The mixing is carried out under light-proof conditions.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The low oxygen inhibition UV curing organic silica gel of the present invention has a wavelength of 365nm at room temperature and a heat release rate of 30J / cm 2 Rapid curing under energy irradiation, excellent surface dryness, high transparency, good strength and adhesion;

[0028] (2) The low-oxygen inhibited UV-curable organic silica gel of the present invention is outstanding in terms of high and low temperature resistance, moisture resistance, electrical insulation, corrosion resistance, and aging resistance. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments. The following examples are implemented under the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, which will help those skilled in the art to further understand the present invention. It should be pointed out that the protection scope of the present invention is not limited to the following embodiments, and several adjustments and improvements made under the premise of the concept of the present invention all belong to the protection scope of the present invention.

[0030] The raw materials used in the examples and comparative examples of the present invention are as follows:

[0031] Acrylic modified silicone oil: viscosity 5000mpa.s, acrylate mass content 5%;

[0032] Mercapto silicone oil: viscosity 500mpa.s, mass content of mercapto 4%;

[0033] Photoinitiator A: isopropylthioxanthone (ITX);

[0034] Photoinitiator B: 2-hydroxy-2-methyl-1-phenylpropanone (1173), 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907); 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone (659);

[0035] Auxiliary agent: 3-(acryloyloxy)propyltrimethoxysilane.

[0036] Example 1

[0037] This embodiment is the preparation A of low-oxygen-inhibited UV-curable organic silica gel.

[0038] 1. Take each raw material according to the following mass fractions:

[0039]

[0040] 2. Preparation process:

[0041] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark and uniformly mixed.

[0042] (2) Cooling to 25° C., adding mercapto silicone oil, 2-hydroxy-2-methyl-1-phenylpropanone (1173) and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in the dark to obtain the mixture.

[0043] Example 2

[0044] This example is the preparation of low oxygen inhibition ultraviolet light curing organic silica gel B

[0045] 1. Take each raw material according to the following mass fractions:

[0046]

[0047] 2. Preparation process:

[0048] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone (659) were stirred at 60°C in the dark and uniformly mixed.

[0049] (2) Cooling to 25° C., adding mercapto silicone oil, 2-hydroxy-2-methyl-1-phenylpropanone (1173) and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in the dark to obtain the mixture.

[0050] Example 3

[0051] This example is the preparation of low oxygen inhibition ultraviolet light curing organic silica gel

[0052] 1. Take each raw material according to the following mass fractions:

[0053]

[0054] 2. Preparation process:

[0055] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark and uniformly mixed.

[0056] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0057] Example 4

[0058] This example is the preparation of low oxygen inhibition ultraviolet light curing organic silica gel

[0059] 1. Take each raw material according to the following mass fractions:

[0060]

[0061]

[0062] 2. Preparation process:

[0063] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark and uniformly mixed.

[0064] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0065] Example 5

[0066] This example is the preparation of low oxygen inhibition ultraviolet light curing organic silica gel

[0067] 1. Take each raw material according to the following mass fractions:

[0068]

[0069] 2. Preparation process:

[0070] (1) Acrylic modified silicone oil, 1-chloro-4-propoxythioxanthene-9-one (CPTX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark.

[0071] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0072] Comparative Example 1

[0073] This comparative example is the preparation E of low-oxygen inhibited UV-curable organic silica gel, which is basically the same as Example 3, except that: there is no mercapto silicone oil.

[0074] 1. Take each raw material according to the following mass fractions:

[0075]

[0076] 2. Preparation process:

[0077] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark and uniformly mixed.

[0078] (2) Cooling to 25° C., adding 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the product.

[0079] Comparative Example 2

[0080] This comparative example is the preparation F of low-oxygen inhibited UV-curable organic silica gel, which is basically the same as Example 3, except that: no initiator A is present.

[0081] 1. Take each raw material according to the following mass fractions:

[0082]

[0083] 2. Preparation process:

[0084] (1) Acrylic modified silicone oil and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark.

[0085] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0086] Comparative Example 3

[0087] This comparative example is the preparation G of low-oxygen inhibited UV-curable organic silica gel, which is basically the same as Example 3, except that: no initiator B is present.

[0088] 1. Take each raw material according to the following mass fractions:

[0089]

[0090] 2. Preparation process:

[0091] (1) Acrylic modified silicone oil and isopropylthioxanthone (ITX) were stirred at 60°C in the dark.

[0092] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0093] Comparative Example 4

[0094] This comparative example is the preparation of low-oxygen inhibited UV-curable organic silica gel H, which is basically the same as Example 3, except that: the amount of mercapto silicone oil used is less.

[0095] 1. Take each raw material according to the following mass fractions:

[0096]

[0097] 2. Preparation process:

[0098] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark;

[0099] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in the dark to obtain the result. The test data are shown in Table 1.

[0100] Comparative Example 5

[0101] This comparative example is the preparation of low-oxygen inhibited UV-curable organic silica gel I, which is basically the same as Example 3, except that: a larger amount of mercapto silicone oil is used.

[0102] 1. Take each raw material according to the following mass fractions:

[0103]

[0104] 2. Preparation process:

[0105] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark;

[0106] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in the dark to obtain the result. The test data are shown in Table 1.

[0107] Comparative Example 6

[0108] This example is the preparation of low-oxygen inhibition ultraviolet light-cured organic silica gel J, which is basically the same as Example 3, except that the acrylic modified silicone oil is replaced by vinyl silicone oil.

[0109] 1. Take each raw material according to the following mass fractions:

[0110]

[0111]

[0112] 2. Preparation process:

[0113] (1) Vinyl silicone oil, isopropylthioxanthone (ITX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark.

[0114] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0115] Comparative Example 7

[0116] This comparative example is the preparation of low-oxygen inhibited UV-curable organic silica gel, which is basically the same as Example 3, except that the photoinitiator A isopropylthioxanthone (ITX) is replaced by 2,4-diethylthioxanthone (DETX).

[0117] 1. Take each raw material according to the following mass fractions:

[0118]

[0119] 2. Preparation process:

[0120] (1) Acrylic modified silicone oil, 2,4-diethylthioxanthone (DETX), and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) were stirred at 60°C in the dark.

[0121] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0122] Comparative Example 8

[0123] This comparative example is the preparation of low-oxygen inhibited UV-curable organic silica gel, which is basically the same as Example 3, except that the photoinitiator B 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone (907) is replaced by phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (819).

[0124] 1. Take each raw material according to the following mass fractions:

[0125]

[0126]

[0127] 2. Preparation process:

[0128] (1) Acrylic modified silicone oil, isopropylthioxanthone (ITX), and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (819) were stirred at 60°C in the dark.

[0129] (2) Cooling to 25° C., adding mercapto silicone oil and 3-(acryloyloxy)propyltrimethoxysilane, and mixing evenly in a dark environment to obtain the mixture.

[0130] Performance Testing:

[0131] Table 1 is the test data of the products of the embodiments and comparative examples, and the examples are tested for their surface drying, curing condition (UVdsc curing rate), transmittance (sample thickness 2mm, UV spectrophotometer 450nm wavelength), aging resistance (reflow soldering 10min / cycle, 3cycles), hardness (sample thickness 2cm, Shore A hardness meter), tensile strength, elongation at break (universal tensile machine), bonding strength (glass), high and low temperature resistance (hot and cold cycle -40℃~-85℃: 1hour / cycle, 1000cycles). The surface drying condition is the most intuitive manifestation of oxygen inhibition, and the other data are reflected by the initiator initiation efficiency.

[0132] Table 1 Example Comparative Example Test Data

[0133]

[0134]

[0135] It can be found from Table 1 that compared with Example 3, no mercapto silicone oil was added in Comparative Example 1, resulting in large surface oiliness and low degree of curing; no photoinitiator A was added in Comparative Example 2, resulting in large surface oiliness and low degree of curing, and the hardness, tensile strength, elongation at break and bonding strength were all low; no photoinitiator B was added in Comparative Example 3, resulting in the product being unable to cure; the small amount of mercapto silicone oil added in Comparative Example 4 resulted in incomplete resolution of cationic inhibition, resulting in surface oil; in Comparative Example 5, excessive mercapto silicone oil migrated to the surface, resulting in surface oil and reduced bonding strength. In Comparative Example 6, the vinyl group is not as active as the acrylate group, and under the action of the initiator, the ethylene double bond is slow to expand, thus affecting the curing effect. In Comparative Examples 7 and 8, other hydrogen abstraction initiators and cleavage initiators were used, respectively, but the effect was not good and it was easy to yellow.

[0136] In summary, the low-oxygen inhibited UV-curable organic silica gel of the present invention can cure quickly. When 10-20 parts of the mercapto silicone oil component is added, under the action of the initiator combination used in the present invention, it has excellent surface dryness, high transparency, good strength and adhesion; and is also outstanding in high and low temperature resistance, moisture resistance, electrical insulation, corrosion resistance, and aging resistance.

[0137] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A low oxygen inhibited UV-curable organic silica gel, characterized in that: The UV-curable organic silica gel comprises the following components in parts by weight: Acrylic modified silicone oil 90-105 parts, 8-20 parts of mercapto silicone oil, Thioxanthone initiator 0.2-0.4 parts, 0.2-1 part of cleavage initiator, 1-2 parts of additives.

2. The UV-curable organic silica gel according to claim 1, characterized in that: The acrylic modified silicone oil is silicone oil containing acrylate groups at the molecular chain end or side group, with a viscosity of 1000-10000 mPa.s and a mass content of acrylate groups of 2-6%.

3. The UV-curable organic silica gel according to claim 1, characterized in that: The mercapto silicone oil is a silicone oil containing mercapto groups at the molecular chain end or side group, with a viscosity of 100-500 mPa.s and a mass content of mercapto groups of 1-5%.

4. The UV-curable organic silica gel according to claim 1, characterized in that: The thioxanthone initiator includes one or more of 2-chlorothioxanthone, 1-chloro-4-propoxythioxanthone-9-one and isopropylthioxanthone.

5. The UV-curable organic silica gel according to claim 1, characterized in that: The cleavage initiator includes one or more of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester, and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone.

6. The UV-curable organic silica gel according to claim 1, characterized in that: The auxiliary agent includes 3-(acryloxy)methyldimethoxysilane, 3-(acryloxy)propyltrimethoxysilane, 3-(methacryloxy)propylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, γ-methacryloxypropyltri(trimethylsiloxy)silane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropyltriisopropoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, 3-isocyanatepropyltriethoxysilane. One or more of silane, 3-isocyanatepropylmethyldimethoxysilane, 1,3,5-tris(trimethoxysilylpropyl)isocyanurate, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, γ-divinyltriaminopropyltrimethoxysilane, 3-ureidopropyltrimethoxysilane, 3-ureidopropyltriethoxysilane, and γ-glycidyloxypropyltrimethoxysilane.

7. A method for preparing the low oxygen inhibited UV-curable organic silica gel according to any one of claims 1 to 6, characterized in that: The steps include: S1, mixing acrylic modified silicone oil and thioxanthone initiator, heating and stirring to obtain mixed silicone oil; S2, after the mixed silicone oil is cooled, mercapto silicone oil and auxiliary agents are added, and the mixture is evenly mixed to obtain the UV-curable organic silica gel; When the cleavage initiator is in solid state at room temperature, the cleavage initiator is added in step S1; When the cleavage initiator is in liquid state at room temperature, the cleavage initiator is added in step S1 and / or step S2.

8. The preparation method according to claim 7, characterized in that: In step S1, the heating and stirring is carried out at 60-70° C. in the dark.

9. The preparation method according to claim 7, characterized in that: In step S2, the temperature is lowered to 10-25°C.

10. The preparation method according to claim 7, characterized in that: In step S2, the mixing is performed under light-proof conditions.

Images