CN101747860A - Single component organic silicon packaging glue cured by ultraviolet for high-power LED - Google Patents
Single component organic silicon packaging glue cured by ultraviolet for high-power LED Download PDFInfo
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Abstract
The invention relates to a single component organic silicon packaging glue cured by ultraviolet for high-power LED and a preparation method thereof. The packaging glue is prepared by mixing a prepolymer component A containing acrylate polysiloxanes, a monomer component B containing acrylate polysiloxanes, a photosensitizer component C and a tackifier component D. The packaging glues obtained with different refractive indexes such as level 1.4, level 1.5 and the like are used for packaging multiple types of high-power LEDs or encapsulation of other optical purposes. By adopting ultraviolet curing, the invention enhances the packaging efficiency of the high-power LED product to a great extend without influencing the temperature tolerance, the discoloration and the light transmittance of the product.
Description
Technical field
The present invention relates to single component organic silicon packaging glue cured by ultraviolet of a kind of great power LED and preparation method thereof.
Technical background
The photodiode of ultraphotic brightness (LIGHE EMITTING DIODE is called for short LED) is the solid state device of a based electroluminescent.LED compares with conventional incandescent, luminescent lamp, high-intensity gas discharge lamp, and it is very little, free from environmental pollution, simple in structure to have a working current, the brightness height, and volume is little, and long service life is waited until advantage.Especially the successful exploitation of White LED, great power LED production has formed the fact.In long-time, can form the 4th generation light source body.
On the structure of LED twinkler as can be known: led chip is to be bonded on the substrate material, links by lead-in wire and outer electrode.Adopt joint sealant then, base material, electrode, lead-in wire, housing equijoin are become whole.Because its volume is little, power is big, brightness is high, duration of service is long, the material of institute's embedding more strict optical property and physics, chemical property requirement have been put forward out.High transparent, anti-discolouring, high temperature resistant, long service life is the prerequisite of LED packaging plastic first-selection.
Common high-power LED encapsulation glue is main formation with the transparent epoxy resin at present, all can not satisfy the necessary performance index of existing high-power LED encapsulation because the curing speed of Resins, epoxy, thermotolerance, high temperature xanthochromia, printing opacity stability, thermal diffusivity etc. are many-sided, therefore must have more excellent material satisfy and encapsulate physics, chemical property requirement.
Summary of the invention
The objective of the invention is to defective, a kind of single component organic silicon packaging glue cured by ultraviolet of great power LED is provided at the prior art existence.This packaging plastic has the curing speed that is exceedingly fast, and has high optical property, excellent chemical performance, good physical and mechanical properties after the curing, and is easy to use, can obviously improve the package speed of big merit led light source.
The present invention also aims to provide a kind of compound method of organic silicon packaging glue of described function of different hardness.
The single component organic silicon packaging glue cured by ultraviolet of great power LED of the present invention, form by containing acrylate-based polysiloxane-based pre-polymer component A, acrylate-based polysiloxane-based monomer component B, photosensitizers component C, tackifier component D mixed preparing, each composition weight umber is as follows:
Component A 80-95
B component 8-40
Component C 0.03-0.3
Component D 0.1-1.5
Above composition weight umber sum is 100.
The polysiloxane-based of described component A is that side group or last-in-chain(LIC) end group position contain acrylate-based polysiloxane, and its functionality is more than two, and molecular weight is at 600-15000;
Described acrylate-based structure is as follows:
CH2CHCOOROCOCH2CH2-, the R=alkyl.
Described polysiloxane is line style or MQ type structure, and its molecular structural formula is as follows:
A-1 (line style)
A-2 (line style)
A-3 (MQ silicone resin)
M1＝0.2-0.3 M2＝1.4-1.6 Q＝1
Above R1=CH
2CHCOOROCOCH
2CH
2One R2 is a methyl or phenyl
A-1∶A-2∶A-3
4-7∶1-3∶2-5
Wherein the ratio of M and Q is 0.8-1.4: 1.
The side group of described polysiloxane contains the methyl or phenyl group, and its refractive index is 1.44-1.56.
The polysiloxane of described B component is the acrylate-based polysiloxane that contains dimethyl-silicon, and the acrylate-based structural formula that contains dimethyl-silicon is: CH2CHCOOCH2Si (CH3) 2O-;
The structural formula of the described acrylate-based siloxanes that contains dimethyl-silicon is as follows:
B-1 (simple function group)
B-2 (two functional groups)
B-3 (trifunctional)
B-4 (four-functional group)
Above R1=CH
2CHCOOCH
2Si (CH
3)
2O-R2 is a methyl or phenyl
Described component C is the light trigger alpha-hydroxyalkyl ketone of cracking type radical type, comprises 2-hydroxy-2-methyl-1-phenyl-acetone-1 (Ciba1173), 1-hydroxyl-cyclohexyl benzophenone (Irgacure184).
Described component D is the tackifier that contain the silane of alkoxyl group, comprises in acryloyl-oxy propyl trimethoxy silicane, trimethoxy isocyanuric acid ester silane, epoxypropyl Trimethoxy silane, the vinyltrimethoxy silane one or more.
Each component can obtain by following approach:
Component A: by the polysiloxane that contains methyl or phenyl of hydrogeneous class and the acrylate addition of two functionality, make the oligopolymer that contains two above acrylate groups of linearity or build, refractive index is between 1.44-1.56.
B component: react by adopting vinylformic acid methyl dimethoxy base silanol and chloride methyl or phenyl polysiloxane and siloxanes, behind the dehydrochlorination, obtain different functionality, different viscosity reactive thinner, refractive index is between 1.43-1.56.
Component C: the light trigger of free radical, can be commercial.
Component D: contain the organoalkoxysilane of active function groups, can be commercial.
The preparation method of described packaging plastic is that component A, B component and the component D that under lucifuge and 25-40 ℃ refractive index is differed less than 0.04 mixes, and packing is available.
As preferably, the preparation method of B component, the described acrylate-based siloxanes B-1 that contains dimethyl-silicon, B-2, B-3, the usage quantity of B-4 is that hardness and the flexible according to prescription requires to select for use.B-1, B-2 is apparent in view to the toughness raising of product of the present invention, B-3, B-4 is apparent in view to the raising of product hardness of the present invention.
As preferably, the preparation method of component C is characterized in that described product is active higher light trigger, mainly is the light trigger of cracking type radical type.Alpha-hydroxyalkyl ketone is to have remarkable light-initiated performance and thermostability, mainly contains 2-hydroxy-2-methyl-1-phenyl-acetone-1 (Ciba1173), 1-hydroxyl-cyclohexyl benzophenone (Irgacure184) etc.
As preferably, the described system of selection of component D is that described product is tackifier, is the silane that contains alkoxyl group, can promote the cementability with various base materials.The acryloyl-oxy propyl trimethoxy silicane is arranged, trimethoxy isocyanuric acid ester silane, epoxypropyl Trimethoxy silane, vinyltrimethoxy silane.
The present invention compared with prior art has following advantage:
1, can make the single-component transparent encapsulation material of the UV curing of extremely ageing-resistant pure silicon ketone.
2, can obtain the goods of different refractive index, can improve transmittance greatly, reduce the light decay of LED goods.
3, can adopt UV-light to solidify in second, make packaging process succinct more, efficient at 2-10.
4, the goods of various toughness and hardness, intensity be can obtain, different packaging procesies and requirement are applicable to.
5, environmental protection, efficient, easy to use.
Embodiment
Synthesizing of UV organic silicon packaging glue raw material of the present invention
Component A contains the synthetic of acrylate-based polysiloxane-based prepolymer
A-1 V9's is synthetic
1 starting material and solvent:
1. a.w-dihydro base polydimethylsiloxane, viscosity (250 ℃) 2000mm
2.s
-1Hydrogen content 0.0037 quality %, water white transparency, structural formula is: V8
2. HDDA 1,6 hexylene glycols are bought, and purity is more than 98.5%
3. stopper: isocyanic acid three (3.5-di-tert-butyl-4-hydroxyl benzyl)
4. catalyzer: hexamethyl two pyridine two iodate, two platinum (solid)
5. solvent, dry-out benzene
1, building-up reactions:
In flask, load onto in the whipping temp reflux exchanger and dropping cup, nitrogen device.Use nitrogen flush after elder generation's drying.Add HDDA4g, dry-out benzene 800g stopper 2g stirs and is warmed up to 26 ℃, adds catalyzer 0.01g, continues to stir after 15 minutes, splashes into siloxanes 460g in 30 minutes, and temperature remains on below 80 ℃.Dropwise, continue to filter then, remove catalyzer 80 ℃ of stirrings 1 hour that reflux.Change bottle again and begin to take out and heat up in a steamer, before 90 ℃, extract all benzene and low boiling out, be warmed up to then about 90 ℃/0.05mmhg extracts unreacted HDDA out, product, water white transparency or light yellow transparent liquid.Refining going hanged down molecule and discolored, and gets product.Refractive index 1.44
Molecular structural formula is:
About V9 D=730
To contain the phenyl amount be that can to make refractive index be 1.5 grades of other products for the poly-methyl of a.w-dihydro base, the phenyl siloxane of 15-20%V8 structure if select for use.
A-2 V12's is synthetic
1 starting material and solvent:
1. a.w-dimethyl polyphenylmethyl base oxygen radical siloxane colourless transparent liquid, structural formula is a hydrogen bond side group class: V10 or V11
D＝10-20
D′＝6-8
D＝15-26
D′＝8-10
H＝3
Viscosity (250 ℃) 800-1200mm
2.s
-1
Hydrogen content 0.1-0.15%
Phenyl content 8-32% refractive index is between 1.401-1.541
Molecular weight 2.360-3.000
HDDA buys, and purity is more than 98.5%
2. stopper isocyanic acid three (3.5-two-tertiary butyl-4-hydroxy benzyl) ester
3. catalyzer: hexamethyl two pyridine two iodate, two platinum (solid)
4. solvent, dry-out benzene
1, building-up reactions.
In flask, load onto in the whipping temp reflux exchanger and dropping cup, nitrogen device.Use nitrogen flush after elder generation's drying.Add HDDA 9g (its proportioning difference of different refractive index and structural formula, but with HDDA: H=2: 1 ratio), dry-out benzene 500g, stopper 2.5-7g, stirring is warmed up to 76 ℃, add catalyst 0.01g, continue to stir after 15 minutes, in 30 minutes, splash into viscosity (25 ℃) 1440mpa.s, contain the siloxanes 400g of phenyl 15.7% said structure formula, temperature is below 80 ℃, dropwise,, filter then 80 ℃ of stirring and refluxing 1 hour, remove out and change bottle behind the catalyzer and take out and heat up in a steamer, extract benzene 12 low-boiling-point substances out at 90 ℃.The HDDA that releases and react at 90 ℃/0.05mmhg gets the product crude product then.
Refining: remove low molecule and discolor product to analyse light be 1.486, viscosity (25 ℃) 1573mpa.s
Molecular structural formula is:
If select phenyl content 25% for use, can obtain the product of refractive index 1.52.
A-3 V13's is synthetic
1, raw material:
1. the MQ resin of hydrogeneous base, water white transparency, viscosity (25 ℃) 700mpa.s, hydrogen content is 0.105 quality %, molecular weight: 946g/mol
2. HDDA 1,6 hexylene glycol double methacrylates are bought, and purity is more than 98.5%.
3. stopper isocyanic acid three (3.5-two-tertiary butyl-4-hydroxy benzyl) ester
4. catalyzer: hexamethyl two pyridine two iodate, two platinum (solid)
5. solvent, dry-out benzene
1, building-up reactions
In flask, load onto in the whipping temp reflux exchanger and dropping cup, nitrogen device.Use nitrogen flush after elder generation's drying.Add HDDA 100g, dry toluene 100g, stopper 4g stir and are warmed up to 26 ℃ of adding catalyzer 0.03g, continue to stir 15 minutes, splash into MQ resin 160g about 40 minutes, and temperature is below 78 ℃ during dropping.Dropwise, continue to cross the elimination catalyzer then 80 ℃ of backflow stirring reactions 1 hour.After 90 ℃, extract filtrate out benzene after changing bottle, extract low-boiling-point substance out, extract unreacted HDDA out at 90 ℃/0.05mmhg then, get product, colourless or light yellow transparent liquid at 90 ℃/50mmhg.
Refining going hanged down molecule, discolors, and gets product, refractive index 1.436, viscosity (25 ℃) 894mpa.s
Molecular structural formula is: V13
Molecular weight is: 1172g/mol left and right sides refractive index 1.48
A-4 V15's is synthetic
1, raw material
1. hydrogen content MQ resin, water white transparency, viscosity (25 ℃) 1140map.s, hydrogen content is 0.073 quality %, refractive index 1.520, molecular weight is about 136g, structural formula: V14
2. HDDA buys, and content is more than 98.5%
3. stopper isocyanic acid three (3.5-two-tertiary butyl-4-hydroxy benzyl) ester
4. catalyzer: hexamethyl two pyridine two iodate, two platinum (solid)
5. solvent, dry-out benzene
2, in flask, load onto in the whipping temp reflux exchanger and dropping cup, nitrogen device.Use nitrogen flush after elder generation's drying.Add HDDA100g, dry toluene 300g, stopper 4g stirs and is warmed up to 76 ℃, add catalyzer 0.03g, continue to stir after 15 minutes, about 40 minutes, splash into MQ resin 310g, temperature remains on below 78 ℃ during dropping, dropwises, and continues 80 ℃ of backflow stirring reactions 1 hour.Cross the elimination catalyzer then.After changing bottle, solution is removed benzene solvent 12 low-boiling-point substances at 90 ℃/50mmhg, extract unreacted HDDA out at 90 ℃/0.05mmhg then and get the product crude product.Refiningly then remove low molecule, discolor product, refractive index 1.528, viscosity (25 ℃) 1200mpa.s structural formula is: V15
Molecular weight is: 1594
Synthesizing of B component hydrogen-containing siloxane oligopolymer
B-1 V17's is synthetic
1, raw material:
1. chlorine end-blocking polydimethylsiloxane, water white transparency, 22270 of molecular weight, viscosity 1540mpa.s, refractive index 1.409, structural formula is as follows: V16
2. vinylformic acid methyl dimethoxy base silanol
3. solvent toluene
2, building-up reactions:
In flask, dry back adds toluene molecule 600g, adds vinylformic acid methyl dimethoxy base silanol 4.5g, chlorine end-blocking silicone oil 310g, stirring and dissolving, to below 20 ℃, use 20 minutes then, splash into triethylamine 5g, dropwise, continue to stir 1.5 hours after-filtration, remove triethylamine hydrochloride, and with the product water time after drying dehydration of giving a baby a bath on the third day after its birth.Be warmed up to 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxane and the low-boiling-point substances that 114 ℃/10mmHg removes toluene and by-product then, get crude product.Refining then, remove low molecule, discolor the water white transparency product, viscosity 1513mpa.s, it is as follows that folding is analysed light 1.422 structural formulas: V17
B-1 V19's is synthetic
Raw material:
1. chlorine end-blocking polydimethyl diphenyl siloxane, 4000 phenyl contents 17.8% of molecular weight
Viscosity 1040mpa.s, refractive index 1.48, structural formula is as follows: V18
2. vinylformic acid methyl dimethoxy base silanol
3. solvent toluene
2, building-up reactions:
In flask, dry back adds toluene molecule 600g, add vinylformic acid methyl dimethoxy base silanol 36g, chlorine end-blocking silicone oil 450g stirring and dissolving is to below 20 ℃, use 20 minutes then, splash into triethylamine 18.7g, dropwise, continue to stir 1.5 hours after-filtration, remove triethylamine hydrochloride, and with the product water time after drying dehydration of giving a baby a bath on the third day after its birth.Be warmed up to 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxane and the low-boiling-point substances that 114 ℃/10mmHg removes toluene and by-product then, get crude product.Refining then, remove low molecule, discolor the water white transparency product, viscosity 1070mpa.s, refractive power 1.489 structural formulas are as follows: V19
If select phenyl content 25.5% for use, can obtain the product of refractive index 1.52.
B-2 V20's is synthetic
Raw material:
1. the dimethyldichlorosilane(DMCS) molecular weight 129
2. vinylformic acid methyl dimethoxy base silanol
3. solvent: dry toluene
2, building-up reactions
In flask, add dry toluene 800g, vinylformic acid methyl dimethoxy base silanol 336g, triethylamine 206g mixes below 20 ℃, splashes into dimethyldichlorosilane(DMCS) 129g when keeping 180 ℃.After drip finishing, continue at room temperature, stir filtrations in 1.5 hours, remove triethylamine hydrochloride after, add in the bottle, removal toluene arrives 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxanes of unreacted vinylformic acid methyl dimethoxy base silanol and by-product.Extract product out at 146 ℃/0.20mmHg then, obtain the product that structural formula is V20, refractive index is 1.44, molecular weight 376.
Molecular weight is: 376 refractive index 1.44
B-2 V21's is synthetic
1 raw material
1. diphenyl dichlorosilane, molecular weight 253
2. vinylformic acid methyl dimethoxy base silanol molecular weight: 160
3. solvent: dry toluene
2, building-up reactions:
In flask, add dry toluene 1000g, vinylformic acid methyl dimethoxy base silanol 336g, triethylamine 206g mixes below 20 ℃, keeping about 180 °, splash into diphenyl dichlorosilane 253g, after drip finishing, continue at room temperature to stir filtration in 1.5 hours, after removing triethylamine hydrochloride, add in the bottle, remove the 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxanes of toluene, get crude product then to unreacted vinylformic acid methyl dimethoxy base silanol and by-product.The refining low molecules such as by product phenylbenzene two silanols that go not have reaction and form after discoloring, obtain the product that structural formula is V21, and refractive index is 1.526, molecular weight 500
Molecular weight is: 500 refractive index 1.526
B-2 V22's is synthetic
1, raw material:
1. dichloromethyl phenylsilane
2. vinylformic acid methyl dimethoxy base silanol
3. solvent: dry toluene
2, building-up reactions:
In flask, add dry toluene 900g, vinylformic acid methyl dimethoxy base silanol 336g, triethylamine 206g mixes below 20 ℃.Keeping about 10 ℃, splash into dichloromethyl phenylsilane 191g.After drip finishing, continue at room temperature to stir 1.5 hours.Filter, after removing triethylamine hydrochloride, join again in another bottle, remove 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxanes of toluene and responseless vinylformic acid methyl dimethoxy base silanol and by-product, then about 155 ℃/0.05mmHg extracts product out, get the structural formula of following V22, molecular weight 408, refractive index 1.489
B-3 V23's is synthetic
1, raw material:
1. a phenyl three oxosilanes, molecular weight 211.5
2. vinylformic acid methyl dimethoxy base silanol
3. solvent: dry toluene
2, formation reaction
In flask, add dry toluene 1400g, vinylformic acid methyl dimethoxy base silanol 496g, add triethylamine 310g and be stirred to below 20 ℃, splashing into a phenyl-trichloro-silicane 212g below 18 ℃, dropwise at room temperature then, stirred 1 hour, be warmed up to 85 ℃-90 ℃ then and also stirred 1 hour, cooled and filtered is removed triethylamine hydrochloride.Again filtrate is joined in another bottle, steam, remove 1.3 vinylformic acid methyl 1.1.3.3 tetramethyl disiloxanes of unreacted vinylformic acid methyl dimethoxy base silanol and by-product, get crude product except that behind the toluene.
Refining: as to go solidss such as a low molecule and a phenyl silanol to get product.Molecular weight is 582, and refractive power 1.488 structures are V23.
B-4 V24's is synthetic
1, raw material:
1. silicon tetrachloride, molecular weight 170
2. vinylformic acid methyl dimethoxy base silanol
3. solvent: dry toluene
2, formation reaction
In flask, add dry toluene 1600g, vinylformic acid methyl dimethoxy base silanol 672g (4.2mol), triethylamine 410g (4.05mol) mixes below 20 ℃, when remaining on 18 ℃, splash into after silicon tetrachloride 170g (1mol) drips off, continue at room temperature to stir 1 hour, heat up then and continue to stir 1 hour after-filtration, remove triethylamine hydrochloride at 80 ℃.Filtrate is packed in another bottle, removed solvent and unreacted reactant and get crude product.
Refining: as to remove low molecule and SiO
2Deng impurity, get product behind the active carbon filtration.Structural formula is V24.
Colourless transparent liquid, molecular weight 664 refractive index 1.446.
Be MQ=4: 1 structural formula
The preparation of UV organic silicon packaging glue of the present invention
Above-mentioned materials is mixed with four kinds of embedding sizing materials according to following ratio, and it is table 1 as a result:
Table 1
Composition experimental example 1 experimental example 2 experimental example 3 experimental example 4
A-1-V9 36.3 5.8 5 44
A-2-V12 4.5 23 25
A-3-V13 17
A-3-V15 36.3 58 60
B-1-V17 27
B-1-V19 9
B-2-V20 12
B-2-V21 13.9 10 5
B-2-V22 1.5
B-3-V23 1.7 2.5
B-4-V24 2.5
Light trigger C 0.1 0.1 0.1 0.1
Tackifier D 0.5 0.5 0.5 0.5
Viscosity CPS 1,280 1,350 1,180 1530
Refractive index 1.52 1.52 1.51 1.44
Product hardness 71A 60D 78D 35A
The result shows, the present invention can make different refractive index, different hardness, single-component silicone packaged material that different flexible is transparent.
Claims (9)
1. the single component organic silicon packaging glue cured by ultraviolet of a great power LED, it is characterized in that forming by containing acrylate-based polysiloxane-based pre-polymer component A, acrylate-based polysiloxane-based monomer component B, photosensitizers component C, tackifier component D mixed preparing, each composition weight umber is as follows:
Component A 80-95
B component 8-40
Component C 0.03-0.3
Component D 0.1-1.5
Above composition weight umber sum is 100.
2. packaging plastic according to claim 1 is characterized in that the polysiloxane-based of described component A is that side group or last-in-chain(LIC) end group position contain acrylate-based polysiloxane, and its functionality is more than two, and molecular weight is at 600-15000;
Described acrylate-based structure is as follows:
CH2CHCOOROCOCH2CH2-, the R=alkyl.
3. packaging plastic according to claim 1 and 2 is characterized in that described polysiloxane is line style or MQ type structure, and its molecular structural formula is as follows:
A-1 (line style)
A-2 (line style)
A-3 (MQ silicone resin)
M1＝0.2-0.3 M2＝1.4-1.6 Q＝1
Above R1=CH
2CHCOOROCOCH
2CH
2-R2 is a methyl or phenyl
A-1∶A-2∶A-3
4-7∶1-3∶2-5
R1=CH2CHCOORCOOCH2CH2-, the R=alkyl, R2=CH3-or C6H11-, wherein the ratio of M and Q is 0.8-1.4: 1.
4. packaging plastic according to claim 3 is characterized in that the side group of described polysiloxane contains the methyl or phenyl group, and its refractive index is 1.44-1.56.
5. packaging plastic according to claim 4, the polysiloxane that it is characterized in that described B component are the acrylate-based polysiloxane that contains dimethyl-silicon, and the acrylate-based structural formula that contains dimethyl-silicon is: CH2CHCOOCH2Si (CH3) 20-;
The structural formula of the described acrylate-based siloxanes that contains dimethyl-silicon is as follows:
B-1 (simple function group)
B-2 (two functional groups)
B-3 (trifunctional)
B-4 (four-functional group)
Above R1=CH
2CHCOOCH
2Si (CH
3)
2O-R2 is a methyl or phenyl
R1=CH2CHCOOCH2Si (CH3) 20-, R2=CH3-or C6H5-.
6. packaging plastic according to claim 5, it is characterized in that described component C is the light trigger alpha-hydroxyalkyl ketone of cracking type radical type, comprise 2-hydroxy-2-methyl-1-phenyl-acetone-1 (Ciba1173), 1-hydroxyl-cyclohexyl benzophenone (Irgacure184).
7. packaging plastic according to claim 6, it is characterized in that described component D is the tackifier that contain the silane of alkoxyl group, comprise in acryloyl-oxy propyl trimethoxy silicane, trimethoxy isocyanuric acid ester silane, epoxypropyl Trimethoxy silane, the vinyltrimethoxy silane one or more.
8. packaging plastic according to claim 7 is characterized in that the preparation method of component A, B is as follows:
Component A: by the polysiloxane that contains methyl or phenyl of hydrogeneous class and the acrylate addition of two functionality, make the oligopolymer that contains two above acrylate groups of linearity or build, refractive index is between 1.44-1.56;
B component: react by adopting vinylformic acid methyl dimethoxy base silanol and chloride methyl or phenyl polysiloxane and siloxanes, behind the dehydrochlorination, the acquisition reactive thinner, refractive index is between 1.43-1.56.
9. the preparation method of the described packaging plastic of claim 1-8 is characterized in that the component A, B component and the component D that under lucifuge and 25-40 ℃ refractive index are differed less than 0.04 mix, and packing is available.
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