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CN115627120B - Single-component solvent-free addition type organosilicon three-proofing coating - Google Patents

Single-component solvent-free addition type organosilicon three-proofing coating Download PDF

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CN115627120B
CN115627120B CN202211319809.1A CN202211319809A CN115627120B CN 115627120 B CN115627120 B CN 115627120B CN 202211319809 A CN202211319809 A CN 202211319809A CN 115627120 B CN115627120 B CN 115627120B
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platinum catalyst
vinyl
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CN115627120A (en
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黎超华
黄有华
黄林华
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Shenzhen Huasee Electronic Technology Co ltd
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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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • 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
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/38—Polysiloxanes modified by chemical after-treatment
    • 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
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/38—Polysiloxanes modified by chemical after-treatment
    • C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
    • C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
    • 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
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • 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
    • C08G2150/00—Compositions for coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

The invention relates to the technical field of organosilicon three-proofing coating, in particular to a single-component solvent-free addition type organosilicon three-proofing coating, which comprises the following components: the single-component solvent-free organosilicon three-proofing coating is prepared by physically mixing the basic compound, the cross-linking agent, the chain extender, the toughening resin, the tackifying auxiliary agent, the delayed platinum catalyst, the inhibitor and the like, and realizes the storage stability of high-temperature rapid curing and normal-temperature non-curing.

Description

Single-component solvent-free addition type organosilicon three-proofing coating
Technical Field
The invention belongs to the field of organic silicon three-proofing coating, and particularly relates to a single-component solvent-free addition type organic silicon three-proofing coating.
Background
The organic silicon rubber has excellent weather resistance, high and low temperature resistance, high insulation, good hydrophobicity and other performance advantages, so that the organic silicon rubber is widely applied to the protection of electronic circuit boards; however, most of the current organic silicon rubber applied to the field of three proofing belongs to a condensation organic silicon system, a solvent is generally added in the use process, small molecules are released in the curing process, pollution is caused to the environment, and the small molecules have obvious corrosion to a circuit board in the long-term use process, so that the reliability of an electronic product is reduced, and the service life of the electronic product is further threatened.
The addition type organosilicon mainly depends on a hydrosilylation curing mechanism, has no small molecule release, has the performance characteristics of environmental protection and no corrosion, but is not effectively applied to the field of electronic three prevention, because on one hand, the addition type organosilicon curing agent has larger reactivity with a catalyst, and can not realize single-component storage, and on the other hand, the addition type organosilicon has larger inertia of molecular groups, has poorer adhesive force with each substrate, and can not play a role in protection.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects and the shortcomings in the background art, providing a preparation method and application of a single-component solvent-free addition type organosilicon three-proofing coating, and mainly solving the technical problems of single-component storage and high adhesive force.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the single-component solvent-free addition type organosilicon three-proofing coating is characterized by being prepared from basic compounds, cross-linking agents, chain extenders, toughening resins, tackifying assistants, delayed platinum catalysts, inhibitors and other compounds through physical mixing, and comprises the following main components:
base Compounds 10-100
0.1 to 10 portions of cross-linking agent
Chain extender 0.1-10
10 to 50 portions of toughening resin
1-10 parts of tackifying assistant
Delayed platinum catalyst 0.01-1
Inhibitor 0.01-1
Preferably, the base compound is one or more compositions of vinyl terminated linear methyl vinyl polysiloxanes having the following structural formula;
Vi-Si(CH 3 ) 2 —O—(Si(CH 3 ) 2 —O)n—Si(CH 3 ) 2 —Vi
wherein n is 2-100, the vinyl content is preferably 0.2% -10% (mass ratio), and the viscosity is 100-10000 mPa.s.
Preferably, the crosslinker is one or more compositions of pendant hydrogen polymethylhydrosiloxanes having the following structural formula;
Si(CH 3 ) 3 —O-(SiHCH 3 —O)n—Si(CH 3 ) 3
wherein n is 1-100, and the preferred H content is 0.1% -1% (mass ratio).
Preferably, the chain extender is one or more compositions of double-ended hydrosiloxanes having the structural formula;
H-Si(CH 3 ) 2 —O-(Si(CH 3 ) 2 —O)n—Si(CH 3 ) 2 -H
wherein n is 2-100, and the preferable H content is 0.01% -0.2% (mass ratio).
Preferably, the tackifying additive is vinyl MQ silicon resin, the vinyl content is 1-20%, and the tackifying additive has the following structural formula;
(MeSiO0.5)a(ViMeSiO0.5)b(SiO2)c
preferably, the tackifying additive is a self-made compound and is mainly prepared from acrylic ester monomers, hydrogen-containing polysiloxane and isocyanate compounds through a two-step reaction;
the main synthesis method comprises the following steps:
firstly, accurately adding 1-20g of hydrogen-containing polysiloxane and 1-30 g acrylate monomer compound into a three-neck flask according to a set molar ratio, dissolving the mixture in a solvent, dropwise adding 0.1-1 g high-activity platinum catalyst solution, controlling the temperature to be 40-120 ℃, and reacting for 2-8 hours to obtain transparent uniform liquid;
and secondly, adding 1-20g of isocyanate compound according to the proportion, controlling the temperature to be 40-120 ℃ for reaction for 2-8 hours, and distilling the transparent uniform liquid under reduced pressure to remove the solvent, thus obtaining the tackifying additive.
Preferably, the hydrogen-containing polysiloxane is terminal hydrogen-containing polysiloxane, and the hydrogen-containing mass ratio is 0.05-0.5 wt%; the acrylic ester monomer is one or a plurality of compositions of acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, 2-methyl methacrylate, 2-ethyl methacrylate, 2-butyl methacrylate, tert-butyl acrylate, hydroxyethyl methacrylate, homologues and derivatives thereof;
the solvent is one or more of ethyl acetate, butyl acetate, toluene, xylene, cyclohexane, cyclohexanol, n-butanol, chloroform, tetrachloromethane and dichloromethane;
the isocyanate compound is one or more of isocyanatopropyl triethoxysilane, 3-isocyanatopropyl trimethoxysilane, 3-isocyanatopropyl methyl dimethoxysilane, 1,3, 5-tris (trimethoxysilylpropyl) isocyanurate, and homologs and derivatives thereof; the platinum catalyst is a high-activity platinum catalyst, and the Pt content is 3000-6000ppm.
Preferably, the delayed platinum catalyst is a self-made compound, and is mainly prepared from a high-activity platinum catalyst and a nitrile compound through a polymerization reaction of a free radical reversible addition-fragmentation transfer (RAFT) method, and the main synthesis method comprises the following steps:
firstly, adding 10-100 g platinum catalyst and 200-500 g solvent into a flask, and mixing by a mechanical stirrer;
secondly, stirring the mixture at 50-80 ℃ for 1-5h, then sequentially adding 1-20 acrylonitrile compounds, and mixing and stirring for 1-5 h;
and thirdly, dropwise adding 0-2g of catalyst, reacting for 8-10h at 50-180 ℃, extracting, distilling under reduced pressure, washing and drying to obtain the target compound delayed platinum catalyst.
Preferably, the solvent is one or more of ethyl acetate, butyl acetate, toluene, xylene, cyclohexane, cyclohexanol, n-butanol, chloroform, tetrachloromethane and dichloromethane;
the platinum catalyst is a high-activity platinum catalyst, and the Pt content is 5000-8000ppm. The nitrile compounds acrylonitrile compounds include, but are not limited to, acrylonitrile, methacrylonitrile, ethyl cyanoacrylate, 2-chloroacrylonitrile, 2-bromoacrylonitrile 3-phenylacrylonitrile, 3-cyclopentylacrylonitrile, 3-diphenylacrylonitrile, 3- (dimethylamino) acrylonitrile, 3- (benzenesulfonyl) acrylonitrile, (E) -3- (4-aminophenyl) acrylonitrile, (Z) -3- (1H-indol-3-yl) acrylonitrile, trans-3- (dimethylamino) acrylonitrile;
the catalyst is a free radical polymerization initiator including, but not limited to, one or more of azobisisobutyronitrile, azobisisoheptonitrile, dibenzoyl peroxide, t-butyl peroxybenzoate, t-butyl hydroperoxide, lauroyl peroxide.
Preferably, the inhibitor is an alkynyl-and polyvinyl-containing compound including, but not limited to, one or more of 1-ethynyl cyclohexanol, 3-methyl-1-butyn-3-ol, 3-phenyl-1-butyn-3-ol, 3-propyl-1-butyn-3-ol, 3-octyl-1-butyn-3-ol.
Compared with the prior art, the invention has the beneficial effects that:
the main innovation of the invention is embodied in the three aspects, namely, the delayed platinum catalyst is obtained through autonomous design synthesis; secondly, obtaining a tackifying auxiliary agent through autonomous design synthesis, wherein the tackifying auxiliary agent introduces active groups on the molecules of the polymethyl hydrosiloxane through a platinum catalyst by a two-step method; thirdly, through formulation design and addition of toughening resin; in addition, the storage stability of the single-component addition type organic silicon coating is excellent in adhesive force between the addition type organic silicon coating and a PCB circuit board, so that the single-component solvent-free organic silicon three-proofing coating prepared by the invention realizes the storage stability of high-temperature rapid solidification and normal-temperature non-solidification.
Drawings
FIG. 1 is a table 1 of performance test results of the three-proofing coating adhesive prepared in each example of the present invention;
FIG. 2 is a diagram of the tackifier synthesis mechanism of the present invention;
FIG. 3 is a diagram showing the mechanism of synthesis of a delayed platinum catalyst according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
a single-component solvent-free addition type organosilicon three-proofing coating comprises the following components in parts by mass:
base Compound 100
Crosslinking agent 2
Chain extender 10
Toughening resin 20
Tackifying agent 10
Delayed platinum catalyst 0.5
Inhibitor 0.1
In this example, the above base compound was vinyl polysiloxane with a vinyl mass ratio of 0.32% by weight, the crosslinking agent was side hydrogen polysiloxane with a hydrogen mass ratio of 0.32% by weight, the chain extender was terminal hydrogen polysiloxane with a hydrogen mass ratio of 0.12%, the toughening resin was vinyl MQ silicone with a vinyl mass ratio of 4.5% by weight, the inhibitor was 1-ethynyl cyclohexanol, and the adhesion promoter and the delayed platinum catalyst were self-made in the laboratory.
The preparation method of the tackifying additive comprises the following steps:
firstly, accurately adding 20g of terminal hydrogen-containing polysiloxane with the hydrogen mass ratio of 0.12% and 22g of hydroxyethyl acrylate into a three-neck flask according to a set molar ratio, dissolving the mixture into ethyl acetate, dropwise adding 0.5 g high-activity platinum catalyst (Pt mass content is 5000 ppm) solution, controlling the temperature to 100 ℃, and reacting for 8 hours to obtain transparent uniform liquid;
and secondly, adding 8g of 3-isocyanatopropyl trimethoxy silane according to the proportion, controlling the temperature to 120 ℃, reacting for 6 hours, and distilling the transparent uniform liquid under reduced pressure to remove the solvent to obtain the tackifying assistant.
The preparation method of the delayed platinum catalyst comprises the following steps:
first, 20g platinum catalyst (pt content 6000 ppm) and 400 g xylene solvent were added to a flask and mixed by a mechanical stirrer;
secondly, stirring the mixture at 80 ℃ for 4 hours, then adding 15g of acrylonitrile, and mixing and stirring 5. 5 h;
thirdly, 1g of azodiisobutyronitrile is added dropwise, and the reaction is carried out for 10 hours at 120 ℃, and the delayed platinum catalyst is obtained through extraction, reduced pressure distillation, washing and drying;
the single-component solvent-free addition type organosilicon three-proofing coating prepared by the method is subjected to performance test and comparison, and the results are shown in Table 1.
Example 2:
a single-component solvent-free addition type organosilicon three-proofing coating comprises the following components in parts by mass:
base Compound 80
Crosslinking agent 1.5
Chain extender 8
Toughening resin 20
Tackifying auxiliary 15
Delayed platinum catalyst 0.3
Inhibitor 0.1
In this example, the above base compound was vinyl polysiloxane with a vinyl mass ratio of 0.42% by weight, the crosslinking agent was side hydrogen polysiloxane with a hydrogen mass ratio of 0.28% by weight, the chain extender was terminal hydrogen polysiloxane with a hydrogen mass ratio of 0.12%, the toughening resin was vinyl MQ silicone with a vinyl mass ratio of 4.5% by weight, the inhibitor was 1-ethynyl cyclohexanol, and the adhesion promoter and the delayed platinum catalyst were self-made in the laboratory.
The preparation method of the tackifying additive comprises the following steps:
firstly, accurately adding 15g of terminal hydrogen-containing polysiloxane with the hydrogen mass ratio of 0.18% and 32g of hydroxyethyl methacrylate into a three-neck flask according to a set molar ratio, dissolving the mixture into toluene, dropwise adding 0.5 g high-activity platinum catalyst (4000 ppm of Pt mass content) solution, controlling the temperature to 80 ℃, and reacting for 8 hours to obtain transparent uniform liquid;
and secondly, adding 8g of isocyanic propyl triethoxysilane according to the proportion, controlling the temperature to 120 ℃ for reaction for 6 hours, and distilling the transparent uniform liquid under reduced pressure to remove the solvent to obtain the tackifying assistant.
The preparation method of the delayed platinum catalyst comprises the following steps:
in the first step, 18 g platinum catalyst (pt content 6000 ppm) was added to the flask with 400 g xylene solvent and mixed by mechanical stirrer. In the second step, the mixture was stirred at 80℃for 4h, then 20g ethyl cyanoacrylate was added and mixed with stirring 5 h. Thirdly, 1g of benzoyl peroxide is added dropwise, the mixture is reacted for 10 hours at 120 ℃, and the delayed platinum catalyst is obtained through extraction, reduced pressure distillation, washing and drying.
The single-component solvent-free addition type organosilicon three-proofing coating prepared by the method is subjected to performance test and comparison, and the results are shown in Table 1.
Example 3:
a single-component solvent-free addition type organosilicon three-proofing coating comprises the following components in parts by mass:
base Compound 100
Crosslinking agent 4
Chain extender 10
Toughening resin 20
Tackifying auxiliary 20
Delayed platinum catalyst 0.2
Inhibitor 0.1
In this example, the above base compound was vinyl polysiloxane with a vinyl mass ratio of 0.32% by weight, the crosslinking agent was side hydrogen polysiloxane with a hydrogen mass ratio of 0.50% by weight, the chain extender was terminal hydrogen polysiloxane with a hydrogen mass ratio of 0.10%, the toughening resin was vinyl MQ silicone with a vinyl mass ratio of 6.4% by weight, the inhibitor was 1-ethynyl cyclohexanol, and the adhesion promoter and the delayed platinum catalyst were self-made in the laboratory.
The preparation method of the tackifying additive comprises the following steps:
firstly, accurately adding 20g of terminal hydrogen-containing polysiloxane with the hydrogen mass ratio of 0.10% and 22g of hydroxyethyl acrylate into a three-neck flask according to a set molar ratio, dissolving in dimethylbenzene, dropwise adding 0.5 g high-activity platinum catalyst (4000 ppm of Pt mass content) solution, controlling the temperature to 80 ℃, and reacting for 6h to obtain transparent uniform liquid;
and secondly, adding 8g of 3-isocyanatopropyl methyl dimethoxy silane according to the proportion, controlling the temperature to 120 ℃, reacting for 6 hours, and distilling under reduced pressure to remove the solvent, thus obtaining the tackifying additive.
The preparation method of the delayed platinum catalyst comprises the following steps:
first, 18 g platinum catalyst (pt content 6000 ppm) and 400 g xylene solvent were added to a flask and mixed by a mechanical stirrer;
second, the mixture was stirred at 80 ℃ for 4h, then 25 g of 3-cyclopentylacrylonitrile was added, and mixed and stirred for 5 h;
thirdly, 1g of azodiisoheptonitrile is added dropwise, and the reaction is carried out at 120 ℃ for 9 h, and the delayed platinum catalyst is obtained through extraction, reduced pressure distillation, washing and drying.
The single-component solvent-free addition type organosilicon three-proofing coating prepared by the method is subjected to performance test and comparison, and the results are shown in Table 1.
The performances of the single-component solvent-free addition type organosilicon three-proofing coating and similar products at home and abroad in the embodiment are tested, and the results are shown in Table 1.
As shown in experimental data in Table 1, the single-component solvent-free addition type organosilicon three-proofing coating prepared by the invention has extremely low viscosity, so that the operation manufacturability is better, compared with foreign similar products, the adhesive force and the mildew resistance are higher, the oil resistance, the solvent resistance, the ultraviolet resistance and the smoke resistance can all reach the same level, and meanwhile, the single-component solvent-free addition type organosilicon three-proofing coating prepared by the invention belongs to addition type silica gel, has no byproduct generation, is safe and environment-friendly, and has the storage temperature.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The single-component solvent-free addition type organosilicon three-proofing coating is characterized by comprising the following components in parts by weight:
base Compounds 10-100
0.1 to 10 portions of cross-linking agent
Chain extender 0.1-10
10 to 50 portions of toughening resin
1-10 parts of tackifying assistant
Delayed platinum catalyst 0.01-1
0.01-1 parts of inhibitor;
the preparation method of the tackifying additive comprises the following steps:
firstly, accurately adding 20g of terminal hydrogen-containing polysiloxane with the hydrogen mass ratio of 0.12% and 22g of hydroxyethyl acrylate into a three-neck flask according to a set molar ratio, dissolving the mixture into ethyl acetate, dropwise adding 0.5 g high-activity platinum catalyst solution, controlling the temperature to 100 ℃, and reacting for 8 hours to obtain transparent uniform liquid, wherein the mass content of the high-activity platinum catalyst is 5000ppm;
secondly, 8g of 3-isocyanatopropyl trimethoxy silane is added according to the proportion, the temperature is controlled at 120 ℃, the reaction is carried out for 6 hours, transparent uniform liquid is obtained, and the solvent is removed by reduced pressure distillation, thus obtaining the tackifying auxiliary agent;
the preparation method of the delayed platinum catalyst comprises the following steps:
the first step, adding 20g platinum catalyst and 400 g xylene solvent into a flask, and mixing by a mechanical stirrer, wherein the mass content of the platinum catalyst is 6000ppm;
secondly, stirring the mixture at 80 ℃ for 4 hours, then adding 15g of acrylonitrile, and mixing and stirring 5. 5 h;
thirdly, 1g of azodiisobutyronitrile is added dropwise, and the reaction is carried out for 10 hours at 120 ℃, and the delayed platinum catalyst is obtained through extraction, reduced pressure distillation, washing and drying.
2. The one-part solventless addition type silicone three-way coating according to claim 1, wherein the base compound is one or more compositions of vinyl-terminated linear methyl vinyl polysiloxane;
the structural formula is as follows: vi-Si (CH) 3 ) 2 —O—(Si(CH 3 ) 2 —O) n —Si(CH 3 ) 2 —Vi，
n is 2-100, vinyl content is 0.2-10 wt% and viscosity is 100-10000 mPa.s.
3. The one-part solventless addition type silicone tri-proof coating of claim 1 wherein the crosslinker is one or more compositions of pendant hydrogen polymethylhydrosiloxanes;
the structural formula is as follows: si (CH) 3 ) 3 —O-(SiHCH 3 —O)n—Si(CH 3 ) 3 ，
Wherein n is 1-100 and H content is 0.1-1 wt%.
4. The one-part solventless addition type silicone tri-proof coating of claim 1, wherein the chain extender is one or more compositions of double-ended hydrosiloxanes;
the structural formula is as follows: H-Si (CH) 3 ) 2 —O-(Si(CH 3 ) 2 —O)n—Si(CH 3 ) 2 -H
Wherein n is 2-100 and H is 0.01-0.2 wt%.
5. The one-component solventless, addition-type silicone tri-proof coating of claim 1, wherein the toughening resin is a vinyl MQ silicone resin, wherein the vinyl MQ silicone resin has a vinyl content of 1% wt-20% wt.
6. The one-part solventless, addition-type silicone tri-proof coating of claim 1, wherein the inhibitor is one or more of 1-ethynyl cyclohexanol, 3-methyl-1-butyn-3-ol, 3-phenyl-1-butyn-3-ol, 3-propyl-1-butyn-3-ol, 3-octyl-1-butyn-3-ol.
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