CN109762342A - A kind of two-component liquid foam silica gel material and preparation method thereof - Google Patents
A kind of two-component liquid foam silica gel material and preparation method thereof Download PDFInfo
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- CN109762342A CN109762342A CN201910004527.4A CN201910004527A CN109762342A CN 109762342 A CN109762342 A CN 109762342A CN 201910004527 A CN201910004527 A CN 201910004527A CN 109762342 A CN109762342 A CN 109762342A
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Abstract
The present invention provides a kind of two ingredient liquids foamed silica gels and preparation method thereof.The two ingredient liquids foamed silica gel is that 1:1 is mixed with according to mass ratio by component A and B component, and component A includes: high viscosity vinyl silicone oil, low viscosity hydroxy silicon oil, MQ resin, white carbon black, Al (OH)3, platinum catalyst, B component includes: high viscosity vinyl silicone oil, containing hydrogen silicone oil, white carbon black, Al (OH)3, inhibitor, foam stabilizer, colorant.The preparation method the following steps are included: prepare A, B component according to raw material proportioning respectively；A, B component are uniformly mixed and obtain mixture, mixture is placed in free foaming in mold, the mixture after foaming is then subjected to post vulcanization, obtains two-component liquid foam silica gel material.Two ingredient liquids foamed silica gel material obtained by this method, uniform foam cell have the characteristics that high rate of closed hole, high foamability, low water absorption and good mechanical property.
Description
Technical field
The invention belongs to technical field of polymer materials more particularly to a kind of two-component liquid foam silica gel material and its systems
Preparation Method.
Background technique
Organosilicon material is to replace the long-chain formed as main chain, using organic group as half inorganic high score of side chain using silicon oxygen bond
Sub- polymer, organosilicon material have good resistant of high or low temperature, weatherability, chemical-resistant, anti-flammability and excellent electricity absolutely
Edge.And silicon foams composite material integrates the good characteristic of organosilicon material and foamed material, has both had organosilicon material
The high-fire resistance of material, and low-density, high flexibility, high resiliency and the good damping noise abatement performance of foamed material are maintained, it is more
For the relatively high situation of performance requirements such as waterproof, damping, gasket (sealing grade IP68), sound insulation, insulation, aviation be heat-insulated.
According to foam structure, silicon rubber foam is divided into obturator-type, open cell type and three kinds of mixed type.The organosilicon foamed material of closed-cell foam
With characteristics such as preferable shockproof cushioning, sound insulation, heat-insulation and heat-preservation and flame-proof explosion-proofs, it is mainly used in automotive field automobile mounted
Idle call heat barrier foam tubing and automobile shock, new energy car battery foamed silica gel seal washer etc..Therefore, one kind is prepared
High rate of closed hole, high-foaming multiple, good mechanical properties, low water absorption high-performance foamed silica gel material have become the heat of research
Point.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind of two-component liquid silica gel foamed material, the Silicone foam have high rate of closed hole, high foamability, low water absorption and good
The features such as mechanical property got well, while the simple preparation method of the silica gel foamed material being also provided.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of two-component liquid foam silica gel material, the two-component liquid foam silica gel material are pressed by component A and B component
It is that 1:1 is mixed with according to mass ratio, includes following in the component A to promote the comprehensive performance of foamed silica gel material
The raw material of parts by weight:
Include the raw material of following parts by weight in the B component:
Above-mentioned two-component liquid foam silica gel material, it is preferred that the high viscosity vinyl silicone oil is poly- for end-vinyl
Dimethyl siloxane, viscosity are 50Pa.s~500Pa.s；The viscosity of the low viscosity hydroxy silicon oil is 30mPa.s~5Pa.s.
Matrix resin can be improved in two-component liquid foam silica gel material of the invention, the high viscosity vinyl silicone oil added in raw material
Molecular weight, to improve the strength of materials to a certain extent, the low viscosity hydroxy silicon oil of addition can then play the work of foaming agent
With.
Above-mentioned two-component liquid foam silica gel material, it is preferred that the mass content of hydrogen is 0.1% in the containing hydrogen silicone oil
~1.5%.End containing hydrogen silicone oil in containing hydrogen silicone oil has the characteristics that hydrogen activity is high, participates in that chain extender can be used as when cross-linking reaction
Increase main chain, the comprehensive performance of foamed silica gel is higher.
Above-mentioned two-component liquid foam silica gel material, it is preferred that the MQ resin is multi-vinyl silicone oil, vinyl
Mass content is 4%~10%.Two-component liquid foam silica gel material of the invention, selected MQ resin is during the reaction
Crosslinking points can be increased, crosslink density is improved, so as to improve the intensity of foamed material.
Above-mentioned two-component liquid foam silica gel material, it is preferred that the platinum catalyst is Karst catalyst, and Pt contains
Amount is 1000ppm~10000ppm.If the additional amount of catalyst exceeds
Above-mentioned two-component liquid foam silica gel material, it is preferred that the inhibitor is 1- alkynyl cyclohexanol, tetramethyl four
One or more of vinyl cyclotetrasiloxane, 1,3- divinyl tetramethyl disiloxane silicon.Two-component liquid of the invention
Body foamed silica gel material, selected inhibitor match with platinum catalyst, reaction speed can be controlled in suitable model
In enclosing.
Above-mentioned two-component liquid foam silica gel material, it is preferred that the colorant is that inorganic with pigmentation is filled out
Material, specially at least one of carbon black, iron oxide red, micaceous iron oxide gray；The foam stabilizer is fluorine containing silicone oil.
The inventive concept total as one, the present invention also provides a kind of systems of above-mentioned two-component liquid foam silica gel material
Preparation Method, comprising the following steps:
(1) A, B component are prepared respectively according to the raw material proportioning of A, B component；
(2) A, B component are uniformly mixed and obtain mixture, mixture is placed in free foaming in mold, it then will foaming
Mixture afterwards carries out post vulcanization, obtains two-component liquid foam silica gel material.
Above-mentioned preparation method, it is preferred that in the step (2), blowing temperature is 80 DEG C~120 DEG C, and foamed time is
10min~30min, post vulcanization temperature are 150 DEG C~180 DEG C, and the post vulcanization time is 2h~4h.Preparation side of the invention
Foaming control is carried out at high temperature in order to make expansion rate match with crosslinking rate, can both reduce catalyst in this way by method
Additive amount, to reduce cost, and expansion rate can be promoted while guaranteeing foaming quality；Set blowing temperature is such as
Fruit is lower than the scope of the present invention, will lead to abscess and hole will cause to send out not blistering if beyond the scope of this invention.
Above-mentioned preparation method, it is preferred that in the step (2), first mixed A, B component using dispersion impeller blender
Then 5min~10min is ground 1~3 time again using three-roll grinder, obtains mixture.Since resin viscosity is big, mixed process
In can be mixed into a large amount of bubbles, cause it is resin expanded after foamed material there is the phenomenon that local macropore, ground using three-roll grinder
It can remove the bubble generated in mixed process, avoid the comprehensive performance for influencing foamed silica gel, while easy to operate convenient to carry out.
Technical solution of the present invention has not only had the component for crosslinking in the raw material of use, but also has had for being condensed dehydrogenation
The component of foaming passes through the reasonable process route, suitable technological parameter of arranging in pairs or groups, it can be ensured that foaming system in reaction process
The cross-linked speed of expansion rate and resin matches, to obtain the double groups of high-performance of closed pore, good mechanical properties, low water absorption
Part liquid foam silica gel material.
In reaction process, hydroxy silicon oil is reacted with containing hydrogen silicone oil shown in related chemical equation such as formula (1), should
Process is mainly foamable reaction, provides foaming required gas by generating hydrogen；Vinyl in vinyl silicone oil, MQ resin
Shown in chemical equation such as formula (2) involved in reacting with containing hydrogen silicone oil, which is mainly cross-linking reaction, it is ensured that gained
Two-component liquid foam silica gel material have certain intensity.
Compared with the prior art, the advantages of the present invention are as follows:
(1) two ingredient liquids foamed silica gel material of the invention, uniform foam cell have high rate of closed hole, high foamability, low
The features such as water absorption rate and good mechanical property, density 350kg/m3~450kg/m3, tensile strength > 300kPa, fracture
Elongation > 80%, water absorption rate < 3%, flame retardant property reach V0 rank.
(2) preparation method of the invention can both be removed because of mixed process using material after three-roll grinder ground and mixed
The bubble brought into guarantees the homogeneity of foam cell, while high-viscosity material can be made more fully mixed.
(3) preparation method of the invention, technique is brief, easy to operate, at low cost, is suitable for large-scale production.
Specific embodiment
To facilitate the understanding of the present invention, invention herein is done below in conjunction with preferred embodiment and more comprehensively, is meticulously retouched
It states, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, and it is of the invention to be not intended to limitation
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
The rate of closed hole of two-component liquid foam silica gel material in following embodiment according to GB/T 1079-2008 standard into
Row test；Density is tested according to ASTM D 1056-14 standard；Tensile strength, elongation at break are according to ASTM D 412-
16 standards are tested；Water absorption rate is tested according to ASTM D 570-98 standard；Flame retardant property is according to GB/T 2408-2008
Standard is tested.
Embodiment 1:
A kind of two-component liquid foam silica gel material of the invention, the two-component liquid foam silica gel material is by component A and B
Component is that 1:1 is mixed with according to mass ratio, wherein includes the raw material of following parts by weight in component A:
Include the raw material of following parts by weight in B component:
The preparation method of the two-component liquid foam silica gel material of the present embodiment, comprising the following steps:
(1) by above-mentioned component A medium viscosity be 200pa.s end-vinyl dimethyl silicone polymer, viscosity 200mpa.s
Low viscosity hydroxy silicon oil, contents of ethylene be 4% multi-vinyl silicone oil, white carbon black, Al (OH)3, Karst catalyst (platinum
Content 3000ppm) it is uniformly mixed, component A is made；The end-vinyl poly dimethyl silicon for being 200pa.s by above-mentioned B component medium viscosity
Oxygen alkane, containing hydrogen silicone oil, white carbon black, the Al (OH) that hydrogen content is 0.2wt%3, fluorine containing silicone oil, micaceous iron oxide gray, 1- alkynyl ring
Hexanol is uniformly mixed, and B component is made；
(2) then with three-roll grinder by dispersion impeller blender mixing 8min, removes mixing
The bubble generated in the process, obtains mixture；Mixture is placed in mold and the free foaming 20min at 115 DEG C, is then existed
Post vulcanization 4h at 180 DEG C obtains two-component liquid foam silica gel material.
Two-component liquid foam silica gel material obtained is grey in the present embodiment.After tested, the two-component of the present embodiment
The rate of closed hole of liquid foam silica gel material is 85%, density 360kg/m3, tensile strength 310kPa, elongation at break is
85%, vertical combustion grade is V0 rank, water absorption rate 2.5%.
Embodiment 2:
A kind of two-component liquid foam silica gel material of the invention, the two-component liquid foam silica gel material is by component A and B
Component is that 1:1 is mixed with according to mass ratio, wherein includes the raw material of following parts by weight in component A:
Include the raw material of following parts by weight in B component:
The preparation method of the two-component liquid foam silica gel material of the present embodiment, comprising the following steps:
(1) by above-mentioned component A medium viscosity be 300pa.s end-vinyl dimethyl silicone polymer, viscosity 200mpa.s
Low viscosity hydroxy silicon oil, contents of ethylene be 4% multi-vinyl silicone oil, white carbon black, Al (OH)3, Karst catalyst (platinum
Content 3000ppm) it is uniformly mixed, component A is made；By above-mentioned viscosity be 300pa.s end-vinyl dimethyl silicone polymer,
Hydrogen content is containing hydrogen silicone oil, white carbon black, the Al (OH) of 0.2wt%3, fluorine containing silicone oil, micaceous iron oxide gray, 1- alkynyl cyclohexanol it is mixed
It closes uniformly, B component is made；
(2) then with three-roll grinder by dispersion impeller blender mixing 8min, removes mixing
The bubble generated in the process, obtains mixture；Mixture is placed in mold and the free foaming 20min at 120 DEG C, is then existed
Post vulcanization 2h at 180 DEG C obtains two-component liquid foam silica gel material.
Two-component liquid foam silica gel material obtained is grey in the present embodiment.After tested, the two-component of the present embodiment
The rate of closed hole of liquid foam silica gel material is 90%, density 390kg/m3, tensile strength 340kPa, elongation at break is
92%, vertical combustion grade is V0 rank, water absorption rate 1.8%.
Embodiment 3:
A kind of two-component liquid foam silica gel material of the invention, the two-component liquid foam silica gel material is by component A and B
Component is that 1:1 is mixed with according to mass ratio, wherein includes the raw material of following parts by weight in component A:
Include the raw material of following parts by weight in B component:
The preparation method of the two-component liquid foam silica gel material of the present embodiment, comprising the following steps:
(1) by above-mentioned component A medium viscosity be 400pa.s end-vinyl dimethyl silicone polymer, viscosity 200mpa.s
Low viscosity hydroxy silicon oil, contents of ethylene be 4% multi-vinyl silicone oil, white carbon black, Al (OH)3, Karst catalyst (platinum
Content 3000ppm) it is uniformly mixed, component A is made；The end-vinyl poly dimethyl silicon for being 400pa.s by above-mentioned B component medium viscosity
Oxygen alkane, containing hydrogen silicone oil, white carbon black, the Al (OH) that hydrogen content is 0.2wt%3, fluorine containing silicone oil, micaceous iron oxide gray, 1- alkynyl ring
Hexanol is uniformly mixed, and B component is made；
(2) then with three-roll grinder by dispersion impeller blender mixing 8min, removes mixing
The bubble generated in the process, obtains mixture；Mixture is placed in mold and the free foaming 20min at 120 DEG C, is then existed
Post vulcanization 2h at 180 DEG C obtains two-component liquid foam silica gel material.
Two-component liquid foam silica gel material obtained is grey in the present embodiment.After tested, the two-component of the present embodiment
The rate of closed hole of liquid foam silica gel material is 94%, density 440kg/m3, tensile strength 390kPa, elongation at break is
101%, vertical combustion grade is V0 rank, water absorption rate 1.3%.
Claims (10)
1. a kind of two-component liquid foam silica gel material, which is characterized in that the two-component liquid foam silica gel material is by component A
It is mixed with B component according to mass ratio for 1:1, includes the raw material of following parts by weight in the component A:
Include the raw material of following parts by weight in the B component:
2. two-component liquid foam silica gel material according to claim 1, which is characterized in that the high viscosity vinyl silicon
Oil is end-vinyl dimethyl silicone polymer, and viscosity is 50Pa.s~500Pa.s；The viscosity of the low viscosity hydroxy silicon oil is
30mPa.s~5Pa.s.
3. two-component liquid foam silica gel material according to claim 1 or 2, which is characterized in that in the containing hydrogen silicone oil
The mass content of hydrogen is 0.1%~1.5%.
4. two-component liquid foam silica gel material according to claim 1 or 2, which is characterized in that the MQ resin is more
Vinyl silicone oil, the mass content of vinyl are 4%~10%.
5. two-component liquid foam silica gel material according to claim 1 or 2, which is characterized in that the platinum catalyst
For Karst catalyst, Pt content is 1000ppm~10000ppm.
6. two-component liquid foam silica gel material according to claim 1 or 2, which is characterized in that the inhibitor is 1-
One of alkynyl cyclohexanol, t etram-ethyltetravinylcyclotetrasiloxane, 1,3- divinyl tetramethyl disiloxane silicon are several
Kind.
7. two-component liquid foam silica gel material according to claim 1 or 2, which is characterized in that the colorant is tool
There are the inorganic filler of pigmentation, specially at least one of carbon black, iron oxide red, micaceous iron oxide gray；The foam stabilizer
For fluorine containing silicone oil.
8. a kind of preparation method of such as two-component liquid foam silica gel material according to any one of claims 1 to 7, feature
It is, comprising the following steps:
(1) A, B component are prepared respectively according to the raw material proportioning of A, B component；
(2) A, B component are uniformly mixed and obtain mixture, mixture is placed in free foaming in mold, it then will be after foaming
Mixture carries out post vulcanization, obtains two-component liquid foam silica gel material.
9. preparation method according to claim 8, which is characterized in that in the step (2), blowing temperature be 80 DEG C~
120 DEG C, foamed time is 10min~30min, and post vulcanization temperature is 150 DEG C~180 DEG C, and the post vulcanization time is 2h~4h.
10. preparation method according to claim 8 or claim 9, which is characterized in that in the step (2), first stirred using dispersion impeller
It mixes device and A, B component is mixed into 5min~10min, then ground 1~3 time using three-roll grinder again, obtain mixture.
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Cited By (9)
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| CN110292231A (en) * | 2019-06-10 | 2019-10-01 | 天津大学 | A kind of tea grounds material silica gel composite insole and preparation method thereof |
| CN110484001A (en) * | 2019-08-23 | 2019-11-22 | 深圳市红叶杰科技有限公司 | A kind of low compression set foamed silica gel and preparation method thereof |
| CN110591378A (en) * | 2019-09-26 | 2019-12-20 | 江苏矽时代材料科技有限公司 | Closed-cell organic silicon foaming adhesive and preparation method thereof |
| CN110684358A (en) * | 2019-10-14 | 2020-01-14 | 东莞市跨越电子有限公司 | Filling foaming encapsulation silica gel for new energy power battery, preparation method and application |
| CN110894363A (en) * | 2019-12-09 | 2020-03-20 | 株洲时代新材料科技股份有限公司 | Tear-resistant organic silicon foam material and preparation method thereof |
| CN111138865A (en) * | 2019-12-30 | 2020-05-12 | 佛山职业技术学院 | Preparation method of novel liquid foaming silica gel for new energy automobile |
| CN111138861A (en) * | 2019-12-31 | 2020-05-12 | 苏州桐力光电股份有限公司 | Graphene-based organic silicon porous nano material and preparation method thereof |
| WO2021035460A1 (en) * | 2019-08-26 | 2021-03-04 | Henkel Ag & Co. Kgaa | Foamable silicone composition, preparation method and use thereof |
| WO2021164241A1 (en) * | 2020-02-17 | 2021-08-26 | 苏州桐力光电股份有限公司 | Organosilicon porous breathable disinfection and sterilization nano-filtration material for masks and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110292231A (en) * | 2019-06-10 | 2019-10-01 | 天津大学 | A kind of tea grounds material silica gel composite insole and preparation method thereof |
| CN110484001A (en) * | 2019-08-23 | 2019-11-22 | 深圳市红叶杰科技有限公司 | A kind of low compression set foamed silica gel and preparation method thereof |
| WO2021035460A1 (en) * | 2019-08-26 | 2021-03-04 | Henkel Ag & Co. Kgaa | Foamable silicone composition, preparation method and use thereof |
| CN110591378A (en) * | 2019-09-26 | 2019-12-20 | 江苏矽时代材料科技有限公司 | Closed-cell organic silicon foaming adhesive and preparation method thereof |
| CN110684358A (en) * | 2019-10-14 | 2020-01-14 | 东莞市跨越电子有限公司 | Filling foaming encapsulation silica gel for new energy power battery, preparation method and application |
| CN110894363A (en) * | 2019-12-09 | 2020-03-20 | 株洲时代新材料科技股份有限公司 | Tear-resistant organic silicon foam material and preparation method thereof |
| CN111138865A (en) * | 2019-12-30 | 2020-05-12 | 佛山职业技术学院 | Preparation method of novel liquid foaming silica gel for new energy automobile |
| CN111138861A (en) * | 2019-12-31 | 2020-05-12 | 苏州桐力光电股份有限公司 | Graphene-based organic silicon porous nano material and preparation method thereof |
| WO2021135379A1 (en) * | 2019-12-31 | 2021-07-08 | 苏州桐力光电股份有限公司 | Graphene-based organic silicon porous nano material and preparation method |
| WO2021164241A1 (en) * | 2020-02-17 | 2021-08-26 | 苏州桐力光电股份有限公司 | Organosilicon porous breathable disinfection and sterilization nano-filtration material for masks and preparation method therefor |
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Application publication date: 20190517 |