CN103205234B - Low-viscosity neutral organic silicone and application thereof - Google Patents
Low-viscosity neutral organic silicone and application thereof Download PDFInfo
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- CN103205234B CN103205234B CN201310083817.5A CN201310083817A CN103205234B CN 103205234 B CN103205234 B CN 103205234B CN 201310083817 A CN201310083817 A CN 201310083817A CN 103205234 B CN103205234 B CN 103205234B
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Abstract
The invention relates to low-viscosity neutral organic silicone and an application of thereof. Raw materials for preparing the organic silicone includes, by weight, 100 parts of polydimethylsiloxane of hydroxyl end, 20-50 parts of plasticizer, 5-10 parts of cross-linking agent, 0.5-2 parts of catalyst and 5-7 parts of film enchanter. The low-viscosity neutral organic silicone is fast in setting time and strong in viscosity; and stripping performance of the low-viscosity neutral organic silicone is significantly improved by above 5N/mm.
Description
Technical field
The present invention relates to the neutral organic silica gel of a kind of low viscosity and application thereof.
Background technology
Sense stricto coating glue shields after referring to the covering surface that is applied in early days various function electronic products PCB circuit cards, glass, metal and various plastics, and coating material surface later should have protection against the tide, insulation, the function such as dustproof, anticorona.In today of electronic technology high speed development; electronics, electric equipment products have been deep into each corner of life, and sensu lato coating glue application has been widened to the coating protection that is widely used in electronic devices and components, electrical appliance module, wiring board, electricbulb outside surface coating protection and electroplates front non-electroplating part.
In recent years, organic silica gel is owing to having good high and low temperature resistance, and good electrical insulation capability has developed into the main Types of electron device coating glue.Organosilicon coating glue is generally single-component packing, is abutted against and touches water in air part solidifying during use, is not once finished and should builds in time in order to using next time again.During construction, adopt the methods such as brushing, spraying, dip-coating, coating is not not flowing hexagram, holiday is limited.One time coating thickness is generally advisable between 0.1-0.2mm.Coating glue, before construction application, must first be coated with wish moisture content and the greasy dirt Ex-all of article surface.First is filmed after surface drying, can be coated with second time.The hairbrush being finished, spray gun etc. should be cleaned in time, in order to using next time again.During construction, note ventilating, in order to solvent evaporates wherein, guarantee safety.
Most of organosilicon coating glue on the market at present, performance is very different, conventionally all exists that curing speed is slow, adhesiveproperties is low, and all shortcomings such as especially tear resistance is poor, have seriously limited the extensive application of organosilicon coating glue.
Therefore, after coating glue is coated with adhesive curing, investigate adhesive power and the toughness of glued membrane, test adhesive power and stripping performance, become the Main Means of evaluating coating colloidality energy.
Summary of the invention
Technical problem to be solved by this invention is to provide the neutral organic silica gel of a kind of low viscosity and application thereof, the invention provides a kind of temperature heating that do not rely on, curable under conventional criteria room temperature environment, in certain hour, can reach the organosilicon coating glue of needed properties, solve the coating film existing in existing coating glue use and easily torn the not enough problem of snappiness.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: the neutral organic silica gel of a kind of low viscosity, described organic silica gel is comprised of each raw material of following parts by weight: 0.5～2 part hydroxy-end capped of 5～10 parts of 20～50 parts, 100 parts of polydimethylsiloxanes, softening agent, linking agents, catalyzer, 5～7 parts of glued membrane tougheners.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described hydroxy-end capped polydimethylsiloxane is that viscosity is one or more the mixture in the polysiloxane of 1000～6000mPa.s.
Further, described softening agent is dimethyl silicone oil or phenyl silicone oil, and the viscosity of described softening agent is 50～200mPa.s.
Further, described linking agent is one or more the mixture in methyl three isopropoxy silane, vinyl silane triisopropoxide, phenyl three isopropoxy silane.
Further, described catalyzer is organic guanidine catalyst.
Further, described glued membrane toughener is comprised of silicone resin and deodorization straight chain aliphatic solvents oil, described silicone resin quality account for silicone resin and deodorization straight chain aliphatic solvents oil gross weight 10%～30%, preferably 20%.
Further, described deodorization straight chain aliphatic solvents oil for normal heptane, D20(be that high mountain ocean, Maoming company produces and commercially available molten Ji oil), high mountain ocean, D40(Maoming company produces and commercially available molten Ji oil) in one or more mixture, described silicone resin is MQ type silicone resin, and molar mass is 3000～6000.
Further, described deodorization straight chain aliphatic solvents oil is preferably normal heptane;
The beneficial effect that adopts above-mentioned further scheme is to use on the basis of deacetone linking agent, by the cooperation of glued membrane toughener and linking agent, the tear resistance of cured glue film is obviously being improved, more than stripping strength can reach 5N/mm.
The present invention also provides the application of the coating of the neutral organic silica gel of a kind of low viscosity non-electroplating part before electronic devices and components, electrical appliance module, wiring board, electricbulb outside surface apply protection and electroplate in protecting.
The present invention also provides the preparation method of the neutral organic silica gel of a kind of low viscosity: will take 100 parts of hydroxy-end capped polydimethylsiloxanes, 20～50 parts, softening agent, 5～10 parts of linking agents, 0.5～2 part of catalyzer, 5～7 parts of glued membrane tougheners, add successively in stirrer and mix, be evacuated to be less than-0.098Mpa, mix N 1～2 hour
2preservation and packaging.
The invention has the beneficial effects as follows:
The invention provides the neutral organic silica gel of a low viscosity, single-component package, be easy to spraying, dip-coating, fast solidifying, cured glue film tool high-low temperature resistant, ageing-resistant, pliable and tough, insulation, protection against the tide, antidetonation, resistance to corona, anti-electric leakage, cold-and-heat resistent change the characteristics such as good, than the general better tear strength of neutral silica gel tool and bonding strength.Be widely used in various electronic devices and components, IC chip, assemble in complete wiring board; protective wire network plate is used and can not affect its work and signal in the severe environment such as various chemical burn into salt fogs, humidity, the many dusts of high pollution, vibrations and high low temperature fully, belongs to a main Types of coating glue.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
Accurately take following various raw material, 6 parts of 20 parts of 100 parts of polydimethylsiloxanes, 200mPa.s dimethyl silicone oils, vinyl silane triisopropoxides, 1 part of (tetramethyl-guanidine radicals) propyl trimethoxy silicane, glued membrane toughener 7 parts of (80 parts of normal heptanes, 20 parts of MQ silicone resin (molecular weight 6000) that 1000mPa.s is hydroxy-end capped, under room temperature, mix 2 hours to even), above-mentioned each component is added in mixing and blending machine successively, be evacuated to-0.1MPa, mix 1 hour to even, N
2preservation and packaging is placed stand-by.
Embodiment 2
Accurately take following various raw material, 20 parts of 100 parts of polydimethylsiloxanes, 100mPa.s dimethyl silicone oils, 6 parts, methyl three isopropoxy silane, 1 part of (tetramethyl-guanidine radicals) propyl trimethoxy silicane, glued membrane toughener 5 parts of (60 parts of normal heptanes, 20 parts of the molten Ji oil of D20,20 parts of MQ silicone resin (molecular weight 3000) that 1500mPa.s is hydroxy-end capped, under room temperature, mix 2 hours to even), above-mentioned each component is added in mixing and blending machine successively, be evacuated to-0.1MPa, mix 1.5 hours to even, N
2preservation and packaging is placed stand-by.
Embodiment 3
Accurately take following various raw material, 6 parts of 50 parts of 100 parts of polydimethylsiloxanes, 50mPa.s dimethyl silicone oils, vinyl silane triisopropoxides, 2 parts of (tetramethyl-guanidine radicals) propyl trimethoxy silicanes, glued membrane toughener 5 parts of (60 parts of normal heptanes, 20 parts of the molten Ji oil of D40,20 parts of MQ silicone resin (molecular weight 3000) that 6000mPa.s is hydroxy-end capped, under room temperature, mix 2 hours to even), above-mentioned each component is added in mixing and blending machine successively, be evacuated to-0.1MPa, mix 2 hours to even, N
2preservation and packaging is placed stand-by.
Embodiment 4
Accurately take following various raw material, 40 parts of 100 parts of polydimethylsiloxanes, 100mPa.s phenyl silicone oil, 8 parts, phenyl three isopropoxy silane, 0.5 part of (tetramethyl-guanidine radicals) propyl trimethoxy silicane, glued membrane toughener 6 parts of (60 parts of normal heptanes, 10 parts of the molten Ji oil of D20,10 parts of the molten Ji oil of D40,20 parts of MQ silicone resin (molecular weight 5000) that 6000mPa.s is hydroxy-end capped, under room temperature, mix 2 hours to even), above-mentioned each component is added in mixing and blending machine successively, be evacuated to-0.1MPa, mix 1 hour to even, N
2preservation and packaging is placed stand-by.
Embodiment 5
Accurately take following various raw material, 3 parts of 20 parts of 100 parts of polydimethylsiloxanes, 200mPa.s phenyl silicone oil, vinyl silane triisopropoxides, 3 parts, phenyl three isopropoxy silane that 1500mPa.s is hydroxy-end capped, 1.5 parts of (tetramethyl-guanidine radicals) propyl trimethoxy silicanes, glued membrane toughener 7 parts of (60 parts of normal heptanes, 20 parts of the molten Ji oil of D40,20 parts of MQ silicone resin (molecular weight 5000), under room temperature, mix 2 hours to even), above-mentioned each component is added in mixing and blending machine successively, be evacuated to-0.1MPa, mix 2 hours to even, N
2preservation and packaging is placed stand-by.
Embodiment 1 to 5 is done to performance test, and performance data is all at 25 ℃, and relative humidity 55%, solidifies the data of surveying after 7 days and specifically see the following form 1.Stripping strength is tested according to GB GB-T7122-1996, and tensile strength is tested according to GB GB1040.1-2006, and shearing resistance test is carried out according to GB GB/T7124-2008, and aluminium flake is selected in test piece.Data presentation, widely used MY3495/3496 like product (Dongguan Ming Yong Electronic Science and Technology Co., Ltd. product type) contrast on low viscosity organic silica gel and domestic market for coating of the present invention, the stripping strength of cured glue film is significantly improved, and has improved the tear resistance of coating glued membrane.
Table 1 test result
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the neutral organic silica gel of a low viscosity, it is characterized in that, described organic silica gel is comprised of each raw material of following parts by weight: 0.5～2 part hydroxy-end capped of 5～10 parts of 20～50 parts, 100 parts of polydimethylsiloxanes, softening agent, linking agents, catalyzer, 5～7 parts of glued membrane tougheners, wherein, described catalyzer is organic guanidine catalyst, described glued membrane toughener is comprised of silicone resin and deodorization straight chain aliphatic solvents oil, described silicone resin quality account for silicone resin and deodorization straight chain aliphatic solvents oil gross weight 10%～30%.
2. the neutral organic silica gel of low viscosity according to claim 1, is characterized in that, described hydroxy-end capped polydimethylsiloxane is that viscosity is one or more the mixture in the polysiloxane of 1000～6000mPa.s.
3. the neutral organic silica gel of low viscosity according to claim 1, is characterized in that, described softening agent is dimethyl silicone oil or phenyl silicone oil, and the viscosity of described softening agent is 50～200mPa.s.
4. the neutral organic silica gel of low viscosity according to claim 1, is characterized in that, described linking agent is one or more the mixture in methyl three isopropoxy silane, vinyl silane triisopropoxide, phenyl three isopropoxy silane.
5. the neutral organic silica gel of low viscosity according to claim 1, it is characterized in that, described deodorization straight chain aliphatic solvents oil is one or more the mixture in normal heptane, D20, D40, and described silicone resin is MQ type silicone resin, and molar mass is 3000～6000.
6. the application of the coating of the neutral organic silica gel of the low viscosity as described in as arbitrary in claim 1 to 5 non-electroplating part before electronic devices and components, electrical appliance module, wiring board, electricbulb outside surface apply protection and electroplate in protecting.
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| CN103666250B (en) * | 2013-12-13 | 2016-03-02 | 烟台德邦科技有限公司 | A kind of organosilicon coating glue and preparation method thereof |
| CN106010237A (en) * | 2016-06-08 | 2016-10-12 | 成都大蓉新材料有限责任公司 | Organosilicone coating material and preparation method thereof |
| CN105968359A (en) * | 2016-06-08 | 2016-09-28 | 成都大蓉新材料有限责任公司 | Hydroxyl resin for organic silicon-coated material and preparation method of hydroxyl resin |
| CN109943245A (en) * | 2019-04-04 | 2019-06-28 | 河北超达密封制品有限公司 | A kind of glass-fiber reinforced silicone band and preparation method thereof |
| CN110527428B (en) * | 2019-08-26 | 2022-01-25 | 广东药科大学 | Coating protection oil and use method thereof |
| CN110724462B (en) * | 2019-10-16 | 2021-07-09 | 烟台德邦科技股份有限公司 | High-surface-dryness ultraviolet curing coating adhesive and preparation method thereof |
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| FR2929286A1 (en) * | 2008-03-28 | 2009-10-02 | Bluestar Silicones France Soc | GUANIDINE-STRUCTURED COMPOUNDS AND THEIR USE AS ORGANOPOLYSILOXANE POLYCONDENSATION CATALYSTS |
| WO2011031452A1 (en) * | 2009-08-25 | 2011-03-17 | Dow Corning Corporation | Process for the preparation of a silicone pressure-sensitive adhesive |
| CN102618208B (en) * | 2011-01-28 | 2014-01-29 | 深圳市百丽春粘胶实业有限公司 | Halogen-free flame-retardant heat-conduction organosilicon electronic pouring sealant and preparation technology thereof |
| CN102558870B (en) * | 2012-01-05 | 2013-05-29 | 北京天山新材料技术股份有限公司 | Single-component ketone-oxime-removing type silicon rubber sealant and preparation method thereof |
| CN102627940A (en) * | 2012-03-28 | 2012-08-08 | 北京化工大学常州先进材料研究院 | Single-component silicone sealant for automobile lamp and preparation method of single-component silicone sealant |
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Application publication date: 20130717 Assignee: WEISHIDA SEMICONDUCTOR TECHNOLOGY (ZHANGJIAGANG) CO., LTD. Assignor: Yantai Darbond Technology Co., Ltd. Contract record no.: 2014990000766 Denomination of invention: Low-viscosity neutral organic silicone and application thereof Granted publication date: 20140416 License type: Exclusive License Record date: 20140924 |
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Address after: No.3-3, Kaifeng Road, Yantai Economic and Technological Development Zone, Shandong Province 264006 Patentee after: Yantai Debang Technology Co.,Ltd. Address before: 264006 No. 98 Jinshajiang Road, Yantai Development Zone, Yantai City, Shandong Province Patentee before: DARBOND TECHNOLOGY Co.,Ltd. |
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