CN109021914A - A kind of two-component silicone structure sealant of building curtain wall and preparation method thereof - Google Patents
A kind of two-component silicone structure sealant of building curtain wall and preparation method thereof Download PDFInfo
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention relates to two-component silicone structure sealants of a kind of building curtain wall and preparation method thereof, belong to silicone structure sealant field, including component A and B component, component A includes antioxidant mother slurry, α, alpha, omega-dihydroxy polydimethyl siloxane, alkoxy end-capped dimethyl silicone polymer, calcium carbonate, fumed silica and plasticizer, B component include carbon black mother slurry, crosslinking agent, coupling agent and catalyst；Antioxidant mother slurry includes α, and alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate and antioxidant, carbon black mother slurry includes carbon black and plasticizer.The present invention is compounded by the excellent antioxidant of selection environmental protection, antioxygenic property, assign silicone structure sealant excellent anti-aging property, pass through the calcium carbonate and fumed silica of selection, it can effectively improve the compatibility of rubber cement, by improving preparation process, it obtains the silicone structure sealant that compatibility is good, storage is stable and meets the requirement in industry and market suitable for building glass curtain wall.
Description
Technical field
The present invention relates to two-component silicone structure sealants of a kind of building curtain wall and preparation method thereof, belong to silicone knot
Structure sealant field.
Background technique
The structure glue for aiming at metal and glass structure in glass curtain wall or non-structural bonding assembly and designing is silicone knot
Structure sealant, for silicone structure sealant using linear polysiloxanes as main material production, main chain mainly has Si-O-Si key group
At silane crosslinker and base polymer react the webbed structure of shape in the curing process, and Si-O-Si key bond energy is high
In ultraviolet light bond energy, therefore silicone structure sealant is for other kinds of sealant, has excellent caking property, resistance to
Time property and anti-ultraviolet property.Silicone structure sealant is divided into one-component silicone structure sealant and two-component structural silicone sealing
Glue is mainly used for the second sealing structure of curtain wall glass structure sealing, hollow glass.One-component silicone structure sealant is not required to
Additional curing agent is added, the change for being moisture in ingress of air and generating physical property, one-component silicone knot are solidified
Structure sealant can be divided into de- acetic acid type according to the substance of release in the curing process, ketoxime removing type, dealcoholized type and de amide type,
Middle dealcoholized type and ketoxime removing type are neutral gum, but dealcoholized type is non-corrosive to any material, and ketoxime removing type then to aluminium,
Coated glass and inorganic material etc. are non-corrosive, are corrosive to copper, lead, zinc and polycarbonate；Two-component structural silicone sealing
Glue is divided into two groups of components, is just cured after two groups of rubber cements mix.
Although silicone structure sealant has excellent anti-aging property, in practical applications, due to environment, weather
Factor, such as light, heat, sample, rainwater, vibration, the influence of wind can all accelerate the aging of silicone structure sealant, make its discoloration, rise
Bubble, crackle, embrittlement, cracking, unsticking, so that structural silicone adhesive performance declines, service life shortens.It is right in the industry in the past
The quality and performance of silicone structure sealant are all to refer to " GB 16776-2005 structural silicone sealant for building " to design
, quality assurance in 10 years can only be provided, therefore most of commercially available silicone structure sealant product can only provide 10 years matter at present
It protects, if the service life of silicone structure sealant is more than 10 years, security risk will be greatly increased.And due to " JGJ 102-
2003 Glass Curtain Wall Projects technical specifications " in clear stipulaties Designing of Glass Curtain Walls Aluminum Alloy Machining Diuision service life minimum requirements be 25 years, at present
Only meet " JG/T 475-2015 building curtain wall silicone structure sealant " and " 002 structure sealant of ETAG assembles system
European Technical authenticates guide " silicone structure sealant can be only achieved the standard of minimum 25 years service life.Therefore, development is sent as an envoy to
High performance silicon structure sealant with the service life 25 years or more is the requirement in market future, and the hot spot of research and development.
Chinese invention patent application prospectus CN 102352214A discloses a kind of two-component structural silicone sealing
Glue, including component A and B component, wherein each component property and content include: α, alpha, omega-dihydroxy polydimethyl siloxane in component A
100 parts, alkyl-blocked dimethyl polysiloxane 10-15 parts, 75-88 parts of filler；Each component property and content include: in B component
50 parts of alkyl-blocked dimethyl polysiloxane, 8 parts of carbon black, 20 parts of alkoxy silane silane crosslinker, 15.5 parts of silane coupling agent,
1-1.5 parts of organic tin catalyst, 0.05-1 parts of ultraviolet absorber.
Chinese invention patent application prospectus CN 107805481A discloses a kind of two-component structural silicone sealing
Glue, including component A: 11 parts of hydroxy-end capped dimethyl silicone polymer, 20-80 parts of alkyl-blocked dimethyl silicone polymer, nothing
50-80 parts of machine filler, 1-5 parts of pigment, B component: 100 parts of alkyl-blocked dimethyl silicone polymer, silane crosslinker 10-30
Part, 1-4 parts of silane coupling agent, 4-8 parts of organic tin catalyst, 3-7 parts of anti-aging agent, 2-6 parts of ultraviolet absorber.
Chinese invention patent application prospectus CN 101864172A discloses a kind of two-component structural silicone for building
Sealant, including component A: 80-120 parts of hydroxy-end capped dimethyl silicone polymer, alkyl-blocked dimethyl silicone polymer 10-
80 parts, 100-300 parts of active filler, B component: 5-15 parts of alkoxy silane, 0.3-5 parts of silane coupling agent, organic tin catalysis
0.01-0.2 parts of agent, 0.01-5 parts of light stabilizer.
As can be seen that improved by increasing the ingredients such as ultraviolet absorber or anti-aging agent in presently disclosed technical literature
The ageing resistance of two-component structural silicone sealant, but the present inventor, by test, discovery makes according to these technical literatures
Finished product out is very sticky or is not able to satisfy the requirement stored for a long time, this is because the ultraviolet absorbing agent of hindered amines or
Anti-aging agent and base rubber poor compatibility, it is unstable so as to cause rubber cement obtained, construction and practical application can not be carried out, therefore now
Few service lifes reach 25 years or more silicone structure sealants on the market.
Summary of the invention
This present invention has made improvements in view of the above-mentioned problems of the prior art improve, i.e., the technical problem to be solved by the present invention is to
A kind of two-component silicone structure sealant and preparation method thereof of building curtain wall is provided, selection environmental protection, antioxygenic property are passed through
Excellent antioxidant type is compounded, thus assign silicone structure sealant excellent anti-aging property, it is specific by selecting
Calcium carbonate and fumed silica, the compatibility of rubber cement obtained can be effectively improved, passing through improves silicone structure sealant
Preparation process be suitably applied in building glass curtain wall to obtain that compatibility is good, the stable silicone structure sealant of storage
In, meet the requirement in industry and market.
In order to solve the above technical problems, the technical scheme adopted by the invention is that providing a kind of two-component of building curtain wall
Silicone structure sealant, including component A and B component, the component A includes: antioxidant mother slurry, α, the poly- diformazan of alpha, omega-dihydroxy
Radical siloxane, alkoxy end-capped dimethyl silicone polymer, calcium carbonate, fumed silica and plasticizer, the B component include
Have: carbon black mother slurry, silane crosslinker, silane coupling agent and organic tin catalyst；Wherein the antioxidant mother slurry includes α,
Alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate and antioxidant, the carbon black mother slurry includes carbon black and plasticizer.
Preferably, in parts by weight, the component A includes:
Wherein the antioxidant mother slurry includes:
α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane
30-60 parts of calcium carbonate
2-30 parts of antioxidant
The B component includes:
Wherein the carbon black mother slurry includes:
100 parts of plasticizer
5-20 parts of carbon black
Preferably, the antioxidant is selected from Hinered phenols antioxidant, phosphite ester antioxidant and sulphur ester antioxidant
One or more of.
Preferably, the antioxidant includes primary antioxidant and auxiliary anti-oxidant, the primary antioxidant is selected from Hinered phenols
Antioxidant, the auxiliary anti-oxidant are one or two kinds of in phosphite ester antioxidant and sulphur ester antioxidant.
Preferably, the primary antioxidant is a kind of or several in antioxidant 1010, antioxidant 1076 and antioxidant 245
Kind, the auxiliary anti-oxidant is one or more of in irgasfos 168, anti-oxidant DLTP and antioxidant DSTP.
The antioxidant 1010 is four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters, is a kind of
The multi-functional Hinered phenols antioxidant of macromolecular, appearance are white crystalline powder, are dissolved in benzene, acetone, chloroform, not soluble in water.Without dirt
Dye, not colored, volatility is small, and resistance to extractable is good.Be widely used in polyethylene, polypropylene, polyformaldehyde, ABS resin, PS resin,
In PVC, engineering plastics, rubber and oil product, there is brilliant antioxygenic property to polypropylene, polyethylene, can effectively extend
The service life of product.
The antioxidant 1076 is β-(4- hydroxyl -3,5- di-tert-butyl-phenyl) propionic acid n-octadecyl alcohol ester, is a kind of non-
The nontoxic Hinered phenols antioxidant of contamination type, appearance are white or micro- yellow solid powder, are soluble in benzene, chloroform, hexamethylene, acetone with
And the organic solvents such as esters, it is slightly soluble in methanol, ethyl alcohol, mineral oil is not soluble in water, stable to light, not easy to change, do not pollute, no
Coloring, volatility it is low, it is water-fast extracting, the advantage that compatibility is good, antioxygenic effect is high, be widely used in polyethylene, polypropylene, poly- first
Aldehyde, ABS resin, polystyrene, polyvinyl chloride alcohol, engineering plastics, synthetic fibers, elastomer, adhesive, wax, synthetic rubber and
In oil product.Prevent substrate thermal oxidative degradation.
The antioxidant 245 is that triethylene-glycol is bis- [β-(3- tertiary butyl-4-hydroxy -5- aminomethyl phenyl) propionic ester],
For non-polluting hindered phenol antioxygen, appearance is white or off-white color crystalline powder, heat resistanceheat resistant oxygen efficiency good with polymer compatibility
Height, be suitable for high-impact polystyrene, ABS resin, AS resin, MBS resin, polyvinyl chloride, polyacetals, polyamide, polyurethane,
Hydroxylating butadiene-styrene rubber and styrene-butadiene latex etc..
The irgasfos 168 is phosphorous acid three (2.4- di-tert-butyl-phenyl) ester, is that a kind of excellent phosphorous acid esters are anti-
Oxygen agent, appearance are white powder, are soluble in the organic solvents such as benzene, chloroform, hexamethylene, are slightly soluble in ethyl alcohol, acetone, not soluble in water,
Alcohol isopolarity solvent, is slightly soluble in esters.Toxicity is low, and volatility is low, and thermal stability is high, and anti-hydrolytic performance is excellent, can effectively divide
The hydroperoxides that the materials hot working that depolymerizes generates in the process, are widely used in polyolefin (such as polyethylene, polypropylene) and alkene
The macromolecules material such as hydrocarbon copolymer, polyamide, polycarbonate, PS resin, PVC, engineering plastics, rubber and oil product, ABS resin
Material.
The anti-oxidant DLTP is dilauryl thiodipropionate, and white wadding flaky crystalline solid is not soluble in water, is dissolved in third
The organic solvents such as ketone, carbon tetrachloride, benzene, petroleum ether, can be widely used for polyethylene, in the synthetic materials such as polypropylene and ABS, PBT,
It can also be used in rubber processing and lubricant grease
The antioxidant DSTP is the double octadecyls of thio-2 acid, and white crystalline powder is dissolved in benzene, chloroform, two sulphur
Change carbon and carbon tetrachloride, be insoluble in dimethylformamide and toluene insoluble in acetone, second alcohol and water, can be widely used for polyethylene,
In the synthetic materials such as polypropylene and ABS, PBT, it can also be used in rubber processing and lubricant grease.
Although the antioxidant is common antioxidant, in the past often by the antioxidant 1010, antioxidant 1076,
Antioxidant 245, irgasfos 168, anti-oxidant DLTP and antioxidant DSTP are used as plastic additive, for improving plastic ageing
Above-mentioned antioxidant is temporarily added into sealant field using the ageing properties for being used to improve sealant without any research by performance.
Preferably, the weight ratio of the primary antioxidant and auxiliary anti-oxidant is 1:1-5:1.
Preferably, the α, viscosity of the alpha, omega-dihydroxy polydimethyl siloxane at 25 DEG C is 5000-80000mPa
S, viscosity of the alkoxy end-capped dimethyl silicone polymer at 25 DEG C are 800-20000mPas.
Preferably, the calcium carbonate is the mixture of the powdered whiting and precipitated calcium carbonate that handle through surface hydrophobicity,
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 1:5-5:1, and the average grain diameter of the calcium carbonate is 0.01-10
μm, moisture content is lower than 0.32%, and the fumed silica passes through silicic acid anhydride, the specific surface area of the fumed silica
For 150-220m2/g.The calcium carbonate by silicic acid anhydride and the fumed silica can be reduced the compatibility with water,
Increase compatibility, the wetability with organic matter.
Preferably, the plasticizer is at least one of dimethicone, MDS silicone oil, hydroxy silicon oil.
Preferably, the silane crosslinker is silester, silicic acid propyl ester, methyltrimethoxysilane oligomer, first
At least one of ethyl triethoxy silicane alkane oligomer.
Preferably, the silane coupling agent is vinyltriethoxysilane, vinyltrimethoxysilane, γ-ammonia
Propyl-triethoxysilicane, γ-aminopropyltriethoxy diethoxy silane, γ-aminopropyltrimethoxysilane, γ-aminopropyl first
Base diethoxy silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, N- (β-aminoethyl)-γ-aminopropyl trimethoxy
At least one of silane.
Preferably, the organic tin catalyst is dibutyl tin dilaurate, dibutyltin diacetate, stannous octoate
At least one of.
Preferably, the α, alpha, omega-dihydroxy polydimethyl siloxane is raw selected from Jiangxi blue star spark Chemical Co., Ltd.
It producesOne or more of in 107 V5000-V80000, the alkoxy end-capped dimethyl silicone polymer is selected from
The production of Jiangsu Ke Xing new material limited liability companyIn F-10A, F-40A, F-01A, J-15, J-200 and J-800
One or more, the precipitated calcium carbonate be selected from Kailong Chemical Group Co., Ltd., Hubei Prov production KLNM-S020,
One or more of in KLNM-S031, KLNM-S034, KLNM-S035, the fumed silica is selected from Cabot Co., Ltd of the U.S.
ProductionTS-720, the plasticizer are selected from the production of Jiangxi blue star spark Chemical Co., Ltd.
StarsilTMOne or more of in PDMS 47V50-47V1000, the antioxidant is raw selected from Ciba (China) Co., Ltd
It produces1010、1076、245、168,PS 800FL、One or more of PS 802FL, the silane crosslinker are selected from Hubei Xiantao Blue Sky Chemical Co., Ltd
One or two kinds of in the D-30 or D-90 of production, the silane coupling agent is raw selected from Hubei Xiantao Blue Sky Chemical Co., Ltd
One or more of in LT171, LT550, LT560 of production, the organic tin catalyst is selected from the new blue sky new material share in Hubei
One or more of in D-80, D-82, D-70 of Co., Ltd's production, the carbon black is selected from the DL- of Cabot Co., Ltd of U.S. production
430。
Preferably, the volume ratio of the component A and B component is 8:1-12:1.
Another technical solution that the present invention also uses is to provide a kind of two-component silicone structure sealant of building curtain wall
Preparation method, comprising the following steps:
(1) prepare antioxidant mother slurry: by antioxidant and α, alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate are mixed
15-40min is heated to 80-130 DEG C, stirs 30-300min, and antioxidant mother slurry is obtained after cooling；
(2) component A rubber cement is prepared: by α, alpha, omega-dihydroxy polydimethyl siloxane, alkoxy end-capped polydimethylsiloxanes
Alkane, plasticizer, calcium carbonate, silica, antioxidant mother, which starch, to be mixed, and further grinds through triple-roller mill, component A glue is made
Slurry；
(3) it prepares carbon black mother slurry: carbon black and plasticizer is ground through triple-roller mill, carbon black dispersion is uniform, it is transferred in kettle, adds
Heat stirs 0.5-5 hours to 80 DEG C -130 DEG C, and carbon black mother slurry is made after cooling；
(4) it prepares B component rubber cement: carbon black mother slurry being added in planet stirring kettle, then is proportionally added into the silane
Crosslinking agent, silane coupling agent and organic tin catalyst are -0.06--0.095MPa in vacuum degree, under revolving speed 200-800rpm
30-80min is stirred, B component rubber cement is made.
It is starched by prefabricated antioxidant mother, so that the antioxidant is distributed in the blown state in antioxidant mother slurry, it can be more
It is mixed with the α, alpha, omega-dihydroxy polydimethyl siloxane and the calcium carbonate well, to guarantee the equal of the antioxidant
Even dispersion similarly, is starched, energy to guarantee the compatibility and storage stability of component A rubber cement obtained by prefabricated carbon black mother
Enough carbon blacks by hardly possible dispersion are better dispersed and are combined with other materials, thus guarantee B component rubber cement compatibility and
Storage stability.
In short, being led to using the two-component silicone structure sealant of a kind of building curtain wall and preparation method thereof of the invention
It crosses the antioxidant type that selection is environmentally friendly, antioxygenic property is excellent to be compounded, to assign, silicone structure sealant is excellent to be resisted
Ageing properties can be effectively improved the compatibility of rubber cement obtained, lead to by selecting specific calcium carbonate and fumed silica
The preparation process for improving silicone structure sealant is crossed, to obtain the silicone structure sealant that compatibility is good, storage is stable, is suitble to
It applies in building glass curtain wall, meets the requirement in industry and market.
Specific embodiment
The following detailed description of embodiments of the present invention, but it is not intended to limit the scope of the invention.
Embodiment 1
The present invention provides a kind of two-component structural silicone sealant of building curtain wall, including component A and B component, according to
Parts by weight meter, the component A includes: antioxidant mother starches 10 parts, α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, alcoxyl
5 parts of dimethyl silicone polymer of base sealing end, 120 parts of calcium carbonate, 10 parts of fumed silica and 20 parts of plasticizer, the B component packet
It has included: 100 parts of carbon black mother slurry, 80 parts of silane crosslinker, 30 parts of silane coupling agent and 8 parts of organic tin catalyst；It is wherein described
Antioxidant mother slurry includes α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, 60 parts of calcium carbonate and 30 parts of antioxidant, the charcoal
Black female slurry includes 20 parts and 100 parts of plasticizer of carbon black, and the volume ratio of the component A and B component is 8:1.
The wherein α, alpha, omega-dihydroxy polydimethyl siloxane are selected from the production of Jiangxi blue star spark Chemical Co., Ltd.107 V5000, the α, viscosity of the alpha, omega-dihydroxy polydimethyl siloxane at 25 DEG C is about 5000mPa
s。
The alkoxy end-capped dimethyl silicone polymer is selected from the production of Jiangsu Ke Xing new material limited liability companyJ-200, viscosity of the alkoxy end-capped dimethyl silicone polymer at 25 DEG C are 20000mPas.
Primary antioxidant in the antioxidant is selected from the production of Ciba (China) Co., Ltd1010, it is auxiliary
Antioxidant is selected from the production of Ciba (China) Co., Ltd168, the primary antioxidant and auxiliary anti-oxidant ratio
For 1:1, the concentration of the primary antioxidant and auxiliary anti-oxidant is 98%.
The calcium carbonate is the mixture of the powdered whiting and precipitated calcium carbonate that handle through surface hydrophobicity, the lightweight carbon
Sour calcium is selected from the KLNM-S020 of Kailong Chemical Group Co., Ltd., Hubei Prov's production, the powdered whiting and the lightweight
The weight ratio of calcium carbonate is 1:5, and the average grain diameter of the powdered whiting and precipitated calcium carbonate is 0.01 μm, and moisture content is
0.32%.
The fumed silica is selected from the production of Cabot Co., Ltd of the U.S.TS-720, the gas phase two
Silica passes through silicic acid anhydride, and the specific surface area of the fumed silica is 150m2/g。
The plasticizer is selected from the Starsil produced from Jiangxi blue star spark Chemical Co., Ltd.TMPDMS 47V50。
The carbon black is selected from the DL-430 of Cabot Co., Ltd of U.S. production.
The silane crosslinker is selected from the D-30 of Hubei Xiantao Blue Sky Chemical Co., Ltd's production.
The silane coupling agent is selected from the LT171 of Hubei Xiantao Blue Sky Chemical Co., Ltd's production.
The organic tin catalyst is selected from the D-80 of Hubei Xiantao Blue Sky Chemical Co., Ltd's production.
The two-component structural silicone sealant of the building curtain wall the preparation method is as follows:
(1) prepare antioxidant mother slurry: by antioxidant and α, alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate are mixed
15min is heated to 130 DEG C, stirs 30min, and antioxidant mother slurry is obtained after cooling；
(2) component A rubber cement is prepared: by α, alpha, omega-dihydroxy polydimethyl siloxane, alkoxy end-capped polydimethylsiloxanes
Alkane, plasticizer, calcium carbonate, silica, antioxidant mother, which starch, to be mixed, and further grinds through triple-roller mill, component A glue is made
Slurry；
(3) it prepares carbon black mother slurry: carbon black and plasticizer is ground through triple-roller mill, carbon black dispersion is uniform, it is transferred in kettle, adds
Heat stirs 0.5 hour to 130 DEG C, and carbon black mother slurry is made after cooling；
(4) it prepares B component rubber cement: carbon black mother slurry being added in planet stirring kettle, then is proportionally added into the silane
Crosslinking agent, silane coupling agent and organic tin catalyst are -0.06MPa in vacuum degree, stir 30min under revolving speed 800rpm, make
Obtain B component rubber cement.
Embodiment 2
Two-component structural silicone sealant and the embodiment 1 of the building curtain wall of embodiment 2 the difference is that: it is described
The ratio of primary antioxidant and auxiliary anti-oxidant is 3:1.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 3:5, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 5 μm, moisture content 0.3%.
The specific surface area of the fumed silica is 200m2/g。
The difference of the preparation method and embodiment 1 of the two-component structural silicone sealant of the building curtain wall of embodiment 2
Be in: by antioxidant and α in the step (1), 30min is mixed in alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate,
100 DEG C are heated to, 160min is stirred；It is heated to 100 DEG C in the step (3), stirs 2.5 hours；True in the step (4)
Reciprocal of duty cycle is -0.08MPa, stirs 50min under revolving speed 500rpm.
Embodiment 3
Two-component structural silicone sealant and the embodiment 1 of the building curtain wall of embodiment 3 the difference is that: it is described
The ratio of primary antioxidant and auxiliary anti-oxidant is 5:1.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 5:1, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 10 μm, moisture content 0.2%.
The specific surface area of the fumed silica is 220m2/g。
The difference of the preparation method and embodiment 1 of the two-component structural silicone sealant of the building curtain wall of embodiment 3
Be in: by antioxidant and α in the step (1), 40min is mixed in alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate,
80 DEG C are heated to, 300min is stirred；It is heated to 80 DEG C in the step (3), stirs 5 hours；In vacuum degree in the step (4)
For -0.095MPa, 80min is stirred under revolving speed 200rpm.
Embodiment 4
Two-component structural silicone sealant and the embodiment 1 of the building curtain wall of embodiment 4 the difference is that: do not add
Add the auxiliary anti-oxidant.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 3:1, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 7 μm, moisture content 0.2%.
The specific surface area of the fumed silica is 180m2/g。
Embodiment 5
Two-component structural silicone sealant and the embodiment 1 of the building curtain wall of embodiment 5 the difference is that: according to
Parts by weight meter, the component A includes: antioxidant mother starches 5 parts, α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, alcoxyl
12 parts of dimethyl silicone polymer of base sealing end, 100 parts of calcium carbonate, 7 parts of fumed silica and 12 parts of plasticizer, the B component packet
It has included: 100 parts of carbon black mother slurry, 55 parts of silane crosslinker, 20 parts of silane coupling agent and 4 parts of organic tin catalyst；It is wherein described
Antioxidant mother slurry includes α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, 45 parts of calcium carbonate and 16 parts of antioxidant, the charcoal
Black female slurry includes 12 parts and 100 parts of plasticizer of carbon black.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 5:3, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 3 μm, moisture content 0.3%.
The specific surface area of the fumed silica is 160m2/g。
Embodiment 6
Two-component structural silicone sealant and the embodiment 1 of the building curtain wall of embodiment 6 the difference is that: according to
Parts by weight meter, the component A includes: antioxidant mother starches 1 part, α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, alcoxyl
20 parts of dimethyl silicone polymer of base sealing end, 80 parts of calcium carbonate, 4 parts of fumed silica and 4 parts of plasticizer, the B component include
Have: 100 parts of carbon black mother slurry, 30 parts of silane crosslinker, 10 parts of silane coupling agent and 1 part of organic tin catalyst；It is wherein described anti-
Oxygen agent mother slurry includes α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane, 30 parts of calcium carbonate and 2 parts of antioxidant, the carbon black mother
Slurry includes 5 parts and 100 parts of plasticizer of carbon black.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 1:3, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 1 μm, moisture content 0.1%.
The specific surface area of the fumed silica is 170m2/g。
Embodiment 7
Embodiment 7 is preferred embodiment, the two-component structural silicone sealant and embodiment of the building curtain wall of embodiment 7
1 the difference is that: the primary antioxidant be selected from Ciba (China) Co., Ltd produce1076, it is described
Auxiliary anti-oxidant is selected from the production of Ciba (China) Co., LtdPS802FL, the primary antioxidant and auxiliary antioxygen
Agent weight ratio is 3:1.
The weight ratio of the powdered whiting and the precipitated calcium carbonate is 1:5, the powdered whiting and lightweight carbonic acid
The average grain diameter of calcium is 1 μm, moisture content 0.1%.
The specific surface area of the fumed silica is 150m2/g。
Comparative example
It is commercial product that comparative example, which uses, which is also the two-component structural silicone sealing for building curtain wall
Glue is that 8:1 is deployed also according to volume ratio between component A and B component.
Related physicochemical property and the test stone such as following table of the finished product that the present invention obtains after embodiment 1-7 and comparative example
It is shown:
As seen from the above table, the tensile propcrties of the two-component structural silicone sealant that the present invention obtains and shear strength
R at 23 DEG Cu,5Value and other performance data are better than commercial product, therefore the two-component structural silicone that the present invention obtains is close
The anti-aging property of sealing is more excellent.
The invention has the benefit that compounded by the excellent antioxidant type of selection environmental protection, antioxygenic property, from
And assign silicone structure sealant excellent anti-aging property, it, can by selecting specific calcium carbonate and fumed silica
Be effectively improved the compatibility of rubber cement obtained, by improving the preparation process of silicone structure sealant, thus obtain compatibility it is good,
Stable silicone structure sealant is stored, is suitably applied in building glass curtain wall, the requirement in industry and market is met.
Claims (10)
1. a kind of two-component silicone structure sealant of building curtain wall, which is characterized in that including component A and B component, the A
Component includes: antioxidant mother slurry, α, alpha, omega-dihydroxy polydimethyl siloxane, alkoxy end-capped dimethyl silicone polymer, carbonic acid
Calcium, fumed silica and plasticizer, the B component includes: carbon black mother slurry, silane crosslinker, silane coupling agent and organic
Tin catalyst；Wherein antioxidant mother slurry includes α, alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate and antioxidant,
The carbon black mother slurry includes carbon black and plasticizer.
2. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that according to weight
Number meter is measured, the component A includes:
Wherein the antioxidant mother slurry includes:
α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxane
30-60 parts of calcium carbonate
2-30 parts of antioxidant
The B component includes:
Wherein the carbon black mother slurry includes:
100 parts of plasticizer
5-20 parts of carbon black.
3. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that described anti-
Oxygen agent is selected from one or more of Hinered phenols antioxidant, phosphite ester antioxidant and sulphur ester antioxidant.
4. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that described anti-
Oxygen agent includes primary antioxidant and auxiliary anti-oxidant, and the primary antioxidant is selected from Hinered phenols antioxidant, and the auxiliary anti-oxidant is selected from
It is one or two kinds of in phosphite ester antioxidant and sulphur ester antioxidant.
5. the two-component silicone structure sealant of a kind of building curtain wall according to claim 4, which is characterized in that the master
Antioxidant is one or more of in antioxidant 1010, antioxidant 1076, antioxidant 245, and the auxiliary anti-oxidant is selected from antioxidant
168, one or more of in anti-oxidant DLTP and antioxidant DSTP.
6. the two-component silicone structure sealant of a kind of building curtain wall according to claim 4, which is characterized in that the master
The weight ratio of antioxidant and auxiliary anti-oxidant is 1:1-5:1.
7. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that the A
The volume ratio of component and B component is 8:1-12:1.
8. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that the α,
Viscosity of the alpha, omega-dihydroxy polydimethyl siloxane at 25 DEG C is 5000-80000mPas, the alkoxy end-capped poly- diformazan
Viscosity of the radical siloxane at 25 DEG C is 800-20000mPas.
9. the two-component silicone structure sealant of a kind of building curtain wall according to claim 1, which is characterized in that the carbon
Sour calcium is the mixture of powdered whiting and the precipitated calcium carbonate handled through surface hydrophobicity, the powdered whiting and the lightweight
The weight ratio of calcium carbonate is 1:5-5:1, and the average grain diameter of the calcium carbonate is 0.01-10 μm, and moisture content is described lower than 0.32%
Fumed silica passes through silicic acid anhydride, and the specific surface area of the fumed silica is 150-220m2/g.
10. a kind of preparation method of the two-component silicone structure sealant of building curtain wall, which is characterized in that including following step
It is rapid:
(1) prepare antioxidant mother slurry: by antioxidant and α, 15- is mixed in alpha, omega-dihydroxy polydimethyl siloxane, calcium carbonate
40min is heated to 80-130 DEG C, stirs 30-300min, and antioxidant mother slurry is obtained after cooling；
(2) component A rubber cement is prepared: by α, alpha, omega-dihydroxy polydimethyl siloxane, alkoxy end-capped dimethyl silicone polymer, increasing
Agent, calcium carbonate, silica, antioxidant mother slurry mixing are moulded, is further ground through triple-roller mill, component A rubber cement is made；
(3) it prepares carbon black mother slurry: carbon black and plasticizer is ground through triple-roller mill, carbon black dispersion is uniform, it is transferred in kettle, is heated to
It 80 DEG C -130 DEG C, stirs 0.5-5 hours, carbon black mother slurry is made after cooling；
(4) it prepares B component rubber cement: carbon black mother slurry being added in planet stirring kettle, then is proportionally added into the crosslinked with silicane
Agent, silane coupling agent and organic tin catalyst are -0.06--0.095MPa in vacuum degree, stir under revolving speed 200-800rpm
B component rubber cement is made in 30-80min.
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