Single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber and preparation method thereof
Technical field
The invention belongs to adhesive area, relate in particular to a kind of single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber and preparation method thereof.
Background technology
Room temperature vulcanized silicone rubber is that begin to grow up the sixties in 20th century a kind of is 10000~100000 with suitable molecular mass, and the polydiorganosiloxane of band active end group is the novel organosilicon product of base polymer.Its principal feature is to need not to use complicated mixing and contour machining equipment, at ambient temperature by means of airborne moisture contact or with cross-linking agent component mutually mixing can be sulfided into elastomerics with three-dimensional net structure.
Room temperature vulcanized silicone rubber can be divided into single-component and double component room temperature vulcanization silicon rubber by the physical aspect of product.Single-component room temperature vulcanized silicon rubber uses technology simple, and construction is preceding without weighing and mixing.Single-component room temperature vulcanized silicon rubber is according to the by product difference that discharges in the vulcanization crosslinking engineering, can be divided into depickling type, ketoxime removing type, dealcoholizing-type again, takes off acid amide type, dehydrogenation type, dehydration-type.
Existing room temperature vulcanized silicone rubber technically, it is slow also to exist vulcanization rate, a little less than the bonding force, characteristics such as insulating property are undesirable, its use properties also are subject to the environmental factors restriction.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part, and provides a kind of vulcanization rate fast, and bonding force is strong, good insulation preformance, environmental compatibility ideal single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber.
The present invention also provides a kind of technology for preparing above-mentioned single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber.
For achieving the above object, the present invention is achieved in that
A kind of single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber, it comprises following component: basic thing, linking agent, thixotropic agent, filler, tackifier and catalyzer.
As a kind of preferred version, single-component dealcoholization of the present invention/ketoxime type room temperature vulcanized silicone rubber in weight ratio, comprises following component:
80~120 parts of basis things
5~15 parts of linking agents
10~90 parts of thixotropic agent
10~200 parts of fillers
1~10 part of tackifier
0.1~5 part of catalyzer.
As another kind of preferred version, basic thing of the present invention is one or more the mixture in the poly-di-ethyl siloxane of α, alpha, omega-dihydroxy polysiloxane, α, alpha, omega-dihydroxy or α, the poly-diphenyl siloxane of alpha, omega-dihydroxy, α, alpha, omega-dihydroxy polysiloxane that wherein preferred 25 ℃ of following viscosity are 2000-80000mPas.
Further, linking agent of the present invention can be selected the Diacetylmonoxime methoxylsilane, Diacetylmonoxime methoxylsilane wherein, by methyltrimethoxy silane and 2-butanone oxime, under the condition of catalyst-free, in about 100~150 ℃ temperature range internal reaction 20h, make, can improve curing speed and bonding strength greatly.
Further, thixotropic agent of the present invention is one or more the mixture in cyanoethyl Trimethoxy silane, wilkinite, 3# white oil, MTD type silicone oil or the methyl-silicone oil, make it in application process, all have good thixotropic property, and can not trickle the inclined-plane of wide-angle and the construction of facade.
In addition, filler of the present invention can be selected one or more the mixture in gas-phase silica, precipitated silica, lime carbonate, talcum powder, silicon powder or the Namigai.The preferred gas-phase silica of the present invention is as filler, because white carbon black is similar to the backbone structure of silicon rubber, the molecular chain of silicon rubber can be adsorbed on the surface of white carbon black particulate, and the white carbon black surface contains a large amount of Si-OH bases, can form hydrogen bond (physical adsorption) with the Si-O key in the silicon rubber molecular chain.
Secondly, tackifier of the present invention can be selected a kind of or its mixture in γ-An Bingjisanyiyangjiguiwan or γ-(glycidoxy) propyl trimethoxy silicane.
Once more, catalyzer of the present invention can be selected in dibutyltin diacetate, dibutyl tin laurate or the tetra isopropyl titanate one or more mixture.
The preparation method of above-mentioned single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber, in weight ratio, can implement as follows:
A, 10~200 parts of 80~120 parts of basic things, filler are added in the vacuum kneader, the dehydration blend moves in the planet stirring tank, and is standby;
B, at room temperature adds 5~15 parts of linking agents, 10~90 parts of thixotropic agent, 1~10 part of tackifier, catalyzer in the described planet stirring tank of step a for 0.1~5 part and to mix, and carries out chemical reaction, promptly gets the purpose product.
As a kind of preferred version, among the step a of the present invention, in 80~150 ℃ of temperature, vacuum tightness is 0.06~0.095MPa with basic thing and filler, and dehydration blend 60~300 minutes moves in the planet stirring tank, and is standby; Among the described step b, with mixing in linking agent, thixotropic agent, tackifier and the described planet stirring tank of catalyzer adding step a, be 0.06~0.095MPa in vacuum tightness, rotating speed is that 100~600rpm carried out chemical reaction 30~180 minutes, promptly gets the purpose product.
Dealcoholysis/ketoxime type room temperature vulcanized silicone rubber is a kind of mixed type room temperature vulcanized silicone rubber, and it has overcome long, shortcoming such as adhesion is not good enough ketoxime removing type room temperature vulcanized silicone rubber set time.Simultaneously this silicon rubber also has insulation, weather-proof, water-fast, dustproof, antifouling, protection against corrosion, premium properties such as shockproof, is not subject to the influence of temperature, frequency change.
Compared with prior art, the present invention has following advantage:
1, adopting the Diacetylmonoxime methoxylsilane is linking agent, can improve the vulcanization rate and the bonding strength of product.
2, production operation is simple and easy, no generation of waste materials.
3, product easy construction, excellent combination property, every index all reaches similar products at home and abroad.
Embodiment
The invention will be further described below in conjunction with embodiment.Protection scope of the present invention not only is confined to the statement of following content.
The present invention is basic thing with α, alpha, omega-dihydroxy polysiloxane, the Diacetylmonoxime methoxylsilane is a linking agent, and be aided with thixotropic agent, filler, tackifier and catalyzer, obtain the single-component dealcoholization that vulcanization rate is fast, bonding strength is big/ketoxime type room temperature vulcanized silicone rubber.
Embodiment 1:
Single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber is characterized in that, in weight ratio, comprises following component:
1 kilogram of α, alpha, omega-dihydroxy polysiloxane
2 kilograms of gas-phase silicas
Diacetylmonoxime methoxylsilane 50 grams
3# white oil 500 grams
γ-An Bingjisanyiyangjiguiwan 100 grams
Dibutyl tin laurate 5 grams.
The preparation method:
Under the drying nitrogen protection; 1 kilogram of α, alpha, omega-dihydroxy polysiloxane (commodity are called 107 glue, 25 ℃ of viscosity are 80000mPas), 2 kilograms of gas-phase silicas (specific surface area is 150 meters squared per gram) are added in the vacuum kneader; in 120 ℃ of temperature; vacuum tightness is 0.08MPa; dehydration blend 100 minutes; move in the planet stirring tank, standby.
At room temperature, with Diacetylmonoxime methoxylsilane 50 grams, 3# white oil 500 grams, γ-An Bingjisanyiyangjiguiwan (trade(brand)name KH550) 100 grams, mix in the dibutyl tin laurate 5 gram adding planet stirring tanks, vacuum tightness is 0.08MPa, and rotating speed is that 400rpm carried out chemical reaction 60 minutes, makes single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber.
Embodiment 2:
Single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber is characterized in that, in weight ratio, comprises following component:
1 kilogram of α, alpha, omega-dihydroxy polysiloxane
2 kilograms of precipitated silicas
Diacetylmonoxime methoxylsilane 50 grams
Methyl-silicone oil 500 grams
γ-(glycidoxy) propyl trimethoxy silicane 100 grams
Tetra isopropyl titanate 6 grams.
The preparation method:
Under the drying nitrogen protection; 1 kilogram of α, alpha, omega-dihydroxy polysiloxane (commodity are called 107 glue, 25 ℃ of viscosity are 80000mPas), 2 kilograms of precipitated silicas (specific surface area is 200 meters squared per gram) are added in the vacuum kneader; in 90 ℃ of temperature; vacuum tightness is 0.09MPa; dehydration blend 200 minutes; move in the planet stirring tank, standby.
At room temperature, with Diacetylmonoxime methoxylsilane 50 grams, methyl-silicone oil (25 ℃ of viscosity are 1000mPas) 500 grams, γ-(glycidoxy) propyl trimethoxy silicane (trade(brand)name KH560) 100 grams, mix in the tetra isopropyl titanate 6 gram adding planet stirring tanks, vacuum tightness is 0.09MPa, and rotating speed is that 200rpm carried out chemical reaction 60 minutes, makes single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber.
Embodiment 3:
Single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber is characterized in that, in weight ratio, comprises following component:
1 kilogram of α, alpha, omega-dihydroxy polysiloxane
1 kilogram of precipitated silica
Talcum powder 500 grams
Namigai 500 grams
Diacetylmonoxime methoxylsilane 50 grams
Methyl-silicone oil 500 grams
γ-An Bingjisanyiyangjiguiwan 80 grams
γ-(glycidoxy) propyl trimethoxy silicane 20 grams
Tetra isopropyl titanate 6 grams.
Under the drying nitrogen protection; with 1 kilogram of α, alpha, omega-dihydroxy polysiloxane (commodity are called 107 glue, 25 ℃ of viscosity are 80000mPas), 1 kilogram of precipitated silica (specific surface area is 200 meters squared per gram), 500 gram talcum powder, 500 gram Namigai; add in the vacuum kneader; in 90 ℃ of temperature; vacuum tightness is 0.08MPa; dehydration blend 200 minutes moves in the planet stirring tank, and is standby.
At room temperature, with Diacetylmonoxime methoxylsilane 50 grams, methyl-silicone oil (25 ℃ of viscosity are 1000mPas) 500 grams, γ-An Bingjisanyiyangjiguiwan (trade(brand)name KH550) 80 grams, γ-(glycidoxy) propyl trimethoxy silicane (trade(brand)name KH560) 20 grams mixes in the tetra isopropyl titanate 6 gram adding planet stirring tanks, and vacuum tightness is 0.08MPa, rotating speed is that 300rpm carried out chemical reaction 30~180 minutes, makes single-component dealcoholization/ketoxime type room temperature vulcanized silicone rubber.The The performance test results of product sees Table 1.
Table 1 product performance test result
Project |
Standard |
Index |
Example 1 |
Example 2 |
Example 3 |
Density (g/cm3) |
GB/T13477.2 |
1.35±0.1 |
1.36 |
1.36 |
1.35 |
Sag |
GB/T13477.6 |
≤ 3 millimeters |
1 |
1 |
1 |
Surface drying time |
GB/T13477.5 |
≤ 3 hours |
8 |
8 |
9 |
Extrudability |
GB/T16776 |
≤ 10 seconds |
7.5 |
7.7 |
7.7 |
Peel off cementability |
GB/T13477.8 |
≥1.0MPa |
1.71 |
1.70 |
1.75 |
Be with being appreciated that, more than about specific descriptions of the present invention, only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, to reach identical technique effect; Use needs as long as satisfy, all within protection scope of the present invention.