CN105017990A - Silicone rubber two-component sealant adhesion promoter - Google Patents
Silicone rubber two-component sealant adhesion promoter Download PDFInfo
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- CN105017990A CN105017990A CN201510437208.4A CN201510437208A CN105017990A CN 105017990 A CN105017990 A CN 105017990A CN 201510437208 A CN201510437208 A CN 201510437208A CN 105017990 A CN105017990 A CN 105017990A
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Abstract
The present invention relates to a silicone rubber two-component sealant adhesion promoter characterized by comprising components of KH550, KH560, KH602 and KH792, the four components are mixedly placed for cross-linking, the calculated weight ratio of KH550: KH560 is 2: 1, the calculated weight ratio of KH602: KH792 is 1: 1, and the calculated weight ratio of KH550: KH602 is 5-6: 1. The silicone rubber two-component sealant adhesion promoter overcomes the disadvantages of single use of KH550 and KH560, inherits the dual advantages of good adhesion and process performance stability, and has excellent overall performance.
Description
Technical field
The invention belongs to seal gum field, the two component sealing gum adhesion promoter of especially a kind of silicone adhesive.
Background technology
The two component sealing gum of silicone adhesive has the ageing-resistant of excellence, water resistance, oil resistant, heat-resisting, chemical resistance, there is the advantage of rapid deep zone solidification, manufacture at double glazing unit for building, mechano-electronic embedding, have a wide range of applications in airfield runway perfusion, but commercially available coupling agent (adhesion promoter) single application is in the two component sealing gum of silicone, there are some shortcomings in application, as KH550 (γ-aminopropyl triethoxysilane), be used alone aminopropyl more active, good to base material cohesive force, but it is very fast to there is reaction in technique, the shortcoming that storage is unstable, KH560 (γ-glycidyl ether oxygen propyl trimethoxy silicane), its epoxy group(ing) has the stable advantage of processing performance, but it is bad to base material cohesive force.
According to the retrieval, find as follows about the related seals glue product adopting above-mentioned properties-correcting agent, concrete disclosed content is as follows:
CN104418577A the invention discloses a kind of preparation method of aerosil modification Surgery therapy block of glass wool, be characterized in first preparing improved silica aerogel slurry, the raw material of improved silica aerogel slurry is, aerosil, properties-correcting agent, tensio-active agent and solvent, wherein, properties-correcting agent is Silane coupling agent KH550, KH560 or KH570; Tensio-active agent is tween 80; Solvent is deionized water or ethanol kind solvent; After the aerosil slurry of modification makes, process block of glass wool with it.Aerosil modification Surgery therapy block of glass wool thermal conductivity of the present invention is low is 0.020W/ (MK), and existing block of glass wool thermal conductivity is 0.038W/ (MK); Block of glass wool temperature tolerance through modification brings up to 650 DEG C by 400 DEG C; By reducing its thermal conductivity, the thickness of block of glass wool about 50% can be reduced, can greatly improve workman's operating efficiency, reduce comprehensive cost.
CN101168657A the present invention relates to a kind of seal gum, and especially a kind of silicon copper seal gum, is mainly used in building trade.Special silicon copper seal gum, by polydimethylsiloxane, fumed silica, 201 silicone oil, nm-class active calcium carbonate, calcium carbonate, KH550 (N-Β-aminoethyl-aminomethyl triethoxyl silane), KH560 (Γ-aminopropyl trimethoxysilane), titanate chelate, dilaurate dibutyl alkene forms.This special silicon copper seal gum can use in the temperature range of-5 DEG C-50 DEG C, and can operation under water.
By reading over, applicant finds, above-mentioned relevant colloid is when using promotor, and what all adopt is add promotor in plastic process, and promotor the application Problems existing does not improve, and the scheme gap provided with the application is larger.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, provide a kind of silicone adhesive two component sealing gum adhesion promoter.The two component sealing gum adhesion promoter of silicone adhesive provided by the invention overcomes the shortcoming that KH550 and KH560 is used alone, and the two-fold advantage that both inheriting again, cohesive force is good and processing performance is stable simultaneously, has excellent over-all properties.
The technical scheme that the present invention realizes object is:
The two component sealing gum adhesion promoter of a kind of silicone adhesive, component consists of KH550, KH560, KH602 and KH792, four kinds of component mixing are placed crosslinked, the described weight ratio through calculating K H550:KH560 is 2:1, the weight ratio of KH602:KH792 is 1:1, described KH550:KH602=5-6:1.
And, by four kinds of components in 20-30 DEG C, mixing placement 24 hours.
And, component and weight ratio as follows:
Advantage of the present invention and positively effect are:
Component KH550 in the two component sealing gum adhesion promoter of silicone adhesive provided by the invention can increase the cohesive force of colloid to base material, component KH560 can increase the package stability of B component (black glue), component KH602 has two function functional groups, the elongation of colloid can be improved, improve the deformability of colloid, applicable larger pressure difference and more large deformation amount, component KH792 has two amino group, cohesive force and the sticking power of colloid can be increased, above-mentioned four kinds of components are first carried out mixing before use and are cross-linked, and it is crosslinked more abundant.And use of the prior art is all above-mentioned auxiliary agent and colloid are mixed in the lump rear use, be not first use after crosslinked for component mixing, this is the maximum difference of the application and prior art, is also the important evidence of the effect that auxiliary agent that the application provides is advocated.
Embodiment
Describe embodiments of the invention in detail below, it should be noted that, the present embodiment is narrative, is not determinate, can not limit protection scope of the present invention with this.
Embodiment 1
The two component sealing gum adhesion promoter of a kind of silicone adhesive, component and weight ratio as follows:
Preparation method: by above-mentioned four kinds of components in 20-30 DEG C, mixing placement 24 hours, if less than 20 DEG C, according to crosslinked progress prolongation storage period, such as 10 DEG C time, 7 days 7 liquid need be placed.
In above-mentioned reaction process, epoxide group in each component is opened, be cross-linked with each other, form new cross-linked binder promotor, instead of the combination of simple four kinds of components, after chemically crosslinked, effectively improve the performance of each monomer, define collaborative facilitation effect, ensure cohesiveness and the stability of colloid.
The weight ratio being 2:1, KH602:KH792 through the weight ratio of calculating K H550:KH560 is 1:1, when the two being mixed, through the contrast of test-results, finds that its best effect be the weight ratio of KH550:KH602 is 5-6:1.
Adopt above-mentioned promotor, the performance test of the two component sealing gum of the silicone made, particular content is as follows:
1, the preparation of the two component sealing gum component A of silicone
107 silicon rubber, dimethyl silicone oil, nm-class active calcium carbonate are weighed in proportion and adds high speed dispersor, place stand-by.
2, the preparation of the two component sealing gum B component of silicone
By dimethyl silicone oil, carbon black, put into kneader, after computer heating control certain hour, with tetraethoxy after three-roller grinding, it is stand-by that positive silicic acid propyl ester, dibutyl tin laurate etc. are mixed in proportion rear support material.
3, adhesion promoter adopts different ratios, and according to by four kinds of components in 20-30 DEG C, the preparation of the mixing placement method of 24 hours,
Table 1 test number and component as follows:
| Numbering | One-tenth is grouped into |
| 1 | KH550：KH560＝10:10 |
| 2 | KH550：KH560＝10:9 |
| 3 | KH550：KH560＝10:8 |
| 4 | KH550：KH560＝10:7 |
| 5 | KH550：KH560＝10:6 |
| 6 | KH550：KH560＝10:5 |
| 7 | KH550：KH560＝10:4 |
| 8 | KH550：KH560＝10:3 |
| 9 | KH550：KH560＝10:2 |
| 10 | KH550：KH560＝10:1 |
| 11 | KH550 |
| 12 | KH560 |
| 13 | KH550：KH560：KH602＝10:5:1.8 |
| 14 | KH550：KH560：KH792＝10:5:1.8 |
| 15 | KH550：KH560：KH602：KH792＝10:5:1.8:1.8 |
Test method: 15 samples of numbering are added the two component sealing gum B component of silicone according to same ratio, is configured to 20 samples, first weighs half beaker and holds, viscosimetric, to be then placed in baking oven 50 DEG C and to dry after 24 hours viscosimetric again.
5, by remaining for step 4 second half according to component A: B component (containing component)=10:1 ratio weighs, and after mixing, can make various test specimen and sealing member, air curing by scraping blade, carry out physical testing after 7 days with putty knife.
6, results and analysis
(1) different viscosity promotor is on the impact of B component package stability (viscosity sign), and the viscosity before namely B component is dried and after drying contrasts
Table 2 different B component storage stability synopsis
| Numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Viscosity (drying front ten thousand CP) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Viscosity (50 DEG C of 24 hours ten thousand CP) | 30 | 28 | 26 | 24 | 22 | 20 | 20 | 20 |
| Numbering | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| Viscosity (drying front ten thousand CP) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | |
| Viscosity (50 DEG C of 24 hours ten thousand CP) | 20 | 20 | 40 | 20 | 20 | 25 | 20 |
As can be seen from Table 2, different adhesion promoters need not to the shelf-stable performance of B component
With the silicone two ingredient elastic seal gum of different adhesion promoters on the impact of the adhesive property of base material (aluminium and PVC).
Table 3 stripping strength synopsis
| Numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Stripping strength (MPa) | 5.2 | 5.1 | 5.3 | 5 | 5.2 | 5.2 | 4.1 | 3.6 |
| Numbering | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| Stripping strength (MPa) | 3.1 | 2.8 | 5.2 | 1.1 | 5.0 | 5.4 | 5.4 |
(3) conclusion, the poorest with the silicone two ingredient elastic seal gum B component package stability of KH550, best to the adhesive property of base material (aluminium and PVC).Best with the silicone two ingredient elastic seal gum B component package stability of KH560, the poorest to the adhesive property of base material (aluminium and PVC).Consider from the summation of package stability and stripping strength, so No. 15 samples are best, are namely best adding KH550:KH560:KH602:KH792=10:5:1.8:1.8.
Claims (3)
1. the two component sealing gum adhesion promoter of silicone adhesive, it is characterized in that: component consists of KH550, KH560, KH602 and KH792, four kinds of component mixing are placed crosslinked, the described weight ratio through calculating K H550:KH560 is 2:1, the weight ratio of KH602:KH792 is 1:1, described KH550:KH602=5-6:1.
2. the two component sealing gum adhesion promoter of silicone adhesive according to claim 1, is characterized in that: by described four kinds of components in 20-30 DEG C, mixing placement 24 hours.
3. the two component sealing gum adhesion promoter of silicone adhesive according to claim 1, is characterized in that: component and weight ratio as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510437208.4A CN105017990A (en) | 2015-07-23 | 2015-07-23 | Silicone rubber two-component sealant adhesion promoter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437208.4A CN105017990A (en) | 2015-07-23 | 2015-07-23 | Silicone rubber two-component sealant adhesion promoter |
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| CN105017990A true CN105017990A (en) | 2015-11-04 |
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| CN201510437208.4A Pending CN105017990A (en) | 2015-07-23 | 2015-07-23 | Silicone rubber two-component sealant adhesion promoter |
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Application publication date: 20151104 |