CN101781464A - Preparation method of silicon rubber foam material - Google Patents
Preparation method of silicon rubber foam material Download PDFInfo
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- CN101781464A CN101781464A CN 201010133816 CN201010133816A CN101781464A CN 101781464 A CN101781464 A CN 101781464A CN 201010133816 CN201010133816 CN 201010133816 CN 201010133816 A CN201010133816 A CN 201010133816A CN 101781464 A CN101781464 A CN 101781464A
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Abstract
The invention discloses a preparation method of a silicon rubber foam material, which is characterized by mixing 100 parts of silicon rubber, 12-85 parts of white carbon black, 2-15 parts of constitution controller, 3-15 parts of foaming agent, 0-5 parts of blowing promoter and 0-8 parts of cross-linking agent promoter and forming, radiating the silicon rubber by electron beams or gamma rays to generate cross-linking reaction, heating the foaming agent for decomposing and foaming, immediately utilizing the electron beams or the gamma rays to carry out secondary radiation crosslinking after foaming the silicon rubber to further improve the comprehensive properties of the silicon rubber foam material. The silicon rubber foam material can be used for sealing, damping, insulation, sound insulation and thermal insulation materials.
Description
Technical field
The present invention relates to a kind of preparation method of silicon rubber foam material, belong to field of high polymer material processing.
Background technology
Silicon rubber foam material is a silicon rubber through the porousness macromolecular material of foaming back preparation, can be divided into closed pore, perforate and mix aperture silicon rubber foam according to the difference of foam structure.According to the Materials Academy Zhang Jikai of Beijing University of Chemical Technology professor " organosilicon material " book of showing described, silicon rubber foam material can be divided into room temperature vulcanized silicone rubber foam and high-temperature silicon disulfide rubber foam.
It is base material that the room temperature vulcanized silicone rubber foam adopts the hydroxy-end capped silicon rubber of condensed type usually, and hydroxy silicon oil is a whipping agent, and platinum complex is a catalyzer, and sulfur foam obtains spongy elastomerics with holes under the room temperature.The room temperature vulcanized silicone rubber foam is applicable to the foam-in-site moulding, plays effects such as filling, sealing, damping.
The traditional preparation process method of high temperature vulcanized foam silicone rubber is that silicon rubber, whipping agent and the vulcanizing agent uniform mixing that will contain microgranular inorganic filler make rubber unvulcanizate, by baking, foaming, makes silicon rubber foam then.The high temperature vulcanizable silicone foam is incorporated into one with the characteristic of silicon rubber and foam materials, the good characteristic that not only has silicon rubber, also have lower density, good absorption mechanical vibration or ballistic physical property, functions such as sound insulation, heat insulation, sealing, can be used as sealing, damping, insulation, sound insulation, heat insulation contour performance materials, have been widely used in fields such as communications and transportation, petrochemical complex, electronic industry, national defence and aerospace.Simultaneously, silicon rubber foam also has physiology inertia, nontoxic, odorless, nothing corrosion, and modulus is little, and softness and high resilience can be used as pharmaceutical factory, food factory is dry with liquid product or the sealing of large-scale drying plant and various filler rods etc.Because silicon rubber foam anti-combustion in light weight, heat-resisting is the excellent material of fabric liner, can be used for the field that has heat and steam transmission and other foam materials can not satisfy performance requriements.
The preparation of high-temperature silicon disulfide rubber foam materials normally adopts superoxide to carry out sulfur foam, sulfidation and foaming process coupling are the keys of the foam materials of preparation foam structure and excellent property, but accomplish that this point is not easy very much, because whipping agent and peroxide vulcanizing agent are all very responsive to temperature, every rising 10 degree of temperature, the decomposition rate of vulcanization rate and whipping agent all is multiplied; In addition, peroxide vulcanizing agent is subject to the influence of whipping agent decompose residues, and the free radical passivation that acidic substance and the easy material that produces hydrogen make superoxide produce easily reduces cross-linking efficiency.In order to regulate the rate of crosslinking of superoxide, often need to add one or more vulcanization accelerators, the research with technology of filling a prescription repeatedly is to reach the coupling of rate of crosslinking and expansion rate.In addition, the homogeneity of peroxide crosslinking is subjected to the influence of its dispersion state in silicon rubber, particularly for rubber foam, thermal conduction is poor, and inside is heated and is slower than the top layer, often causes the top layer of sizing material and internal crosslinking degree varies to cause, foamy density is also inhomogeneous, and epidermis is thicker.
Summary of the invention
The preparation method that a kind of obturator-type silicone rubber foam material of providing at the deficiencies in the prior art is provided.
Technical characterictic of the present invention is: this method is that silicon rubber is mixed with strengthening agent, whipping agent and other auxiliary agent and moulding, silicon rubber generation crosslinking reaction after electron beam or gamma-rays radiation, by heating whipping agent is reduced foaming then, it is crosslinked to adopt electron beam or gamma-rays to carry out secondary rays immediately after the silicon rubber foaming, with the over-all properties of further raising silicon rubber foam material.
The silicon rubber foam material of present method preparation can be used as sealing, damping, insulation, sound insulation, lagging material.
Purpose of the present invention is realized that by following technical measures wherein said raw material umber is parts by weight except that specified otherwise.
A kind of obturator-type silicone rubber foam material, the recipe ingredient of this foam materials is by weight: 100 parts in silicon rubber, 12～85 parts of white carbon blacks, 2～15 parts of constitution controllers, 3～15 parts of whipping agents, 0～5 part of blowing promotor, 0～8 part of additional crosslinker:
Described silicon rubber is at least a in dimethyl silicone rubber, methyl vinyl silicone rubber, the methyl phenyl vinyl silicone rubber.
Described strengthening agent is any one in precipitated silica, the thermal silica.
Described constitution controller is any one in light basic silicone oil, Diphenylsilanediol, hexamethyldisilazane, octamethylcyclotetrasiloxane, the γ-An Bingjisanyiyangjiguiwan.
Described whipping agent is any one in Cellmic C 121, azobisisobutyronitrile, dinitrosopentamethylene tetramine, the two benzol sulfohydrazide ethers.
Described blowing promotor is any one in Zinic stearas, zinc oxide, the urea.
Described additional crosslinker is any one in trimethylolpropane trimethacrylate, cyanacrylate, the triallylcyanurate etc.
The preparation method of obturator-type silicone rubber foam material of the present invention comprises the steps:
1, the preparation of silicone rubber compounds
With the white carbon black of silicon rubber 12～85 weight parts of 100 weight parts, the constitution controller of 2～15 weight parts, the whipping agent of 3～15 weight parts, the blowing promotor of 0～5 weight part, the additional crosslinker of 0～8 weight part, adopt mill or Banbury mixer at room temperature mixing, mixing time is 8～15 minutes, then with the sizing material that mixes under the room temperature on vulcanizing press compression molding be shaped to sheet material.
2, the radiation crosslinking of silicone rubber compounds
Adopt cobalt 60 gamma ray projectors or electron electrostatic accelerator, at room temperature in the air silicon rubber is carried out radiation, radiation dose is 5～20kGy, makes silicon rubber generation crosslinking reaction.
3, the foaming of radiation crosslinking silicon rubber
Radiation crosslinking silicon rubber is adopted vulcanizing press, warm air or glycerol bath foamable, and blowing temperature is 140～210 ℃, and foamed time is 5～10 minutes.
4, the secondary rays after the silicon rubber foaming is crosslinked
After the silicon rubber foaming, it is crosslinked to adopt cobalt 60 gamma ray projectors or electron electrostatic accelerator to carry out secondary rays immediately, and radiation dose is 20～50kGy.
Experimental result shows, the present invention adopts the obturator-type silicone rubber foam material of radiation crosslinking method preparation to have excellent comprehensive performances, compare with u s company product of the same type, the silicon rubber foam material tensile strength and the elongation at break of the present invention's preparation are higher, and compression set is less.
The present invention has following advantage: adopt the method for radiation crosslinking to prepare silicon rubber foam material, make crosslinked and the foaming process proceed step by step, technology is simple, easy and simple to handle, when having avoided common employing peroxide vulcanizing agent, need sulfidation and foaming process to be complementary, problems such as the control more complicated of preparation process and product properties.
The abscess of the prepared silicon rubber foam material of the present invention is tiny evenly, smooth surface, tensile strength and elongation at break height, and compression set is low.
Embodiment
Below by specific embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this following examples can only be used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1: with 100 gram dimethyl silicone rubbers, 15 gram thermal silicas, 2 gram hydroxy silicon oils, adopt at room temperature mixing 4 minutes of two roller mills, add 3 gram Cellmic C 121s, 3 gram zinc oxide, 4 gram cyanacrylates, continued mixing 4 minutes, then under the room temperature on vulcanizing press compression molding be shaped to sheet material.Adopt right cylinder formula cobalt 60 gamma ray projectors, at room temperature in the air, silicone rubber compounds is carried out radiation crosslinking, radiation dose is 6kGy.Silicon rubber after crosslinked is foamed in warm air, and hot air temperature is 200 ℃, and foamed time is 5 minutes.After the silicon rubber foaming, it is crosslinked to adopt cobalt 60 gamma ray projectors to carry out secondary rays immediately, and radiation dose is 50kGy.
Embodiment 2: with 100 gram methyl vinyl silicone rubbers, 30 gram thermal silicas, 6 gram Diphenylsilanediols, adopted Banbury mixer at room temperature mixing 7 minutes, add 8 gram dinitrosopentamethylene tetramines, 2 gram urea, 2 gram trimethylolpropane trimethacrylates, continued mixing 5 minutes, then under the room temperature on vulcanizing press compression molding be shaped to sheet material.Adopt JJ-2 type electrostatic accelerator, at room temperature in the air, silicone rubber compounds is carried out radiation crosslinking, irradiation dose is 10kGy.Film after crosslinked is foamed in warm air, and hot air temperature is 190 ℃, and foamed time is 8 minutes.After the silicon rubber foaming, it is crosslinked to adopt JJ-2 type electrostatic accelerator to carry out secondary rays immediately, and radiation dose is 30kGy.
Claims (3)
1. the preparation method of a silicon rubber foam material, it is characterized in that: with 100 parts in silicon rubber, 12～85 parts of white carbon blacks, 2～15 parts of constitution controllers, 3～15 parts of whipping agents, 0～5 part of blowing promotor, additional crosslinker mixes and moulding for 0～8 part, silicon rubber generation crosslinking reaction reduces foaming whipping agent by heating then after electron beam or gamma-rays radiation, and it is crosslinked to adopt electron beam or gamma-rays to carry out secondary rays immediately after the silicon rubber foaming.
2. according to the preparation method of the described silicon rubber foam material of claim 1, it is characterized in that:
1. described silicon rubber is at least a in dimethyl silicone rubber, methyl vinyl silicone rubber, the methyl phenyl vinyl silicone rubber;
2. described strengthening agent is any one in precipitated silica, the thermal silica;
3. described constitution controller is any one in light basic silicone oil, Diphenylsilanediol, hexamethyldisilazane, octamethylcyclotetrasiloxane, the γ-An Bingjisanyiyangjiguiwan;
4. described whipping agent is any one in Cellmic C 121, azobisisobutyronitrile, dinitrosopentamethylene tetramine, the two benzol sulfohydrazide ethers;
5. described blowing promotor is any one in Zinic stearas, zinc oxide, the urea;
6. described additional crosslinker is any one in trimethylolpropane trimethacrylate, cyanacrylate, the triallylcyanurate etc.
3. according to the preparation method of the described silicon rubber foam material of claim 1, it is characterized in that comprising the steps:
1. the preparation of silicone rubber compounds, be about to the white carbon black of silicon rubber 12～85 weight parts of 100 weight parts, the constitution controller of 2～15 weight parts, the whipping agent of 3～15 weight parts, the blowing promotor of 0～5 weight part, the additional crosslinker of 0～8 weight part, adopt mill or Banbury mixer at room temperature mixing, mixing time is 8～15 minutes, then with the sizing material that mixes under the room temperature on vulcanizing press compression molding be shaped to sheet material;
2. the radiation crosslinking of silicone rubber compounds promptly adopts cobalt 60 gamma ray projectors or electron electrostatic accelerator, at room temperature in the air silicon rubber is carried out radiation, and radiation dose is 5～20kGy, makes silicon rubber generation crosslinking reaction;
3. the foaming of radiation crosslinking silicon rubber is about to radiation crosslinking silicon rubber and adopts vulcanizing press, warm air or glycerol bath foamable, and blowing temperature is 140～210 ℃, and foamed time is 5～10 minutes;
4. the secondary rays after the silicon rubber foaming is crosslinked, i.e. after the silicon rubber foaming, it is crosslinked to adopt brill 60 gamma ray projectors or electron electrostatic accelerator to carry out secondary rays immediately, and radiation dose is 20～50kGy.
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| CN 201010133816 CN101781464A (en) | 2010-03-22 | 2010-03-22 | Preparation method of silicon rubber foam material |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152553A (en) * | 2010-11-24 | 2011-08-17 | 吴江朗科化纤有限公司 | Method for processing silicon rubber composite material |
| CN102584324A (en) * | 2012-01-22 | 2012-07-18 | 深圳市沃尔核材股份有限公司 | Cement flame-retardant foaming thermal insulation plate and production method thereof |
| CN103289412A (en) * | 2013-05-22 | 2013-09-11 | 易宝（福建）高分子材料股份公司 | Silicone rubber closed-cell foamed material and preparation method thereof |
| CN104312168A (en) * | 2014-11-07 | 2015-01-28 | 中蓝晨光化工研究设计院有限公司 | Porous liquid room temperature vulcanization foam silicone rubber and preparation method thereof |
| CN104725871A (en) * | 2014-12-17 | 2015-06-24 | 苏州锦腾电子科技有限公司 | Foamed silicone rubber and preparation method thereof |
| CN104744946A (en) * | 2015-04-16 | 2015-07-01 | 中国工程物理研究院核物理与化学研究所 | High-temperature-resistant silicone rubber foam material and preparation method thereof |
| CN104893312A (en) * | 2015-07-01 | 2015-09-09 | 中国工程物理研究院核物理与化学研究所 | Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof |
| CN105504820A (en) * | 2016-01-07 | 2016-04-20 | 东莞市日源盛橡胶绝缘制品有限公司 | Formula and preparation method of conductive silica gel foam material |
| CN106336668A (en) * | 2016-09-29 | 2017-01-18 | 中国工程物理研究院核物理与化学研究所 | Self-adhesion silicone rubber foam material and preparation method thereof |
| CN106349709A (en) * | 2016-08-24 | 2017-01-25 | 江苏天辰新材料股份有限公司 | Low-density microcellular foaming silicone rubber and preparation method thereof |
| CN106995610A (en) * | 2016-01-26 | 2017-08-01 | 东莞市希贝实业有限公司 | A kind of foamed silastic material and preparation method thereof |
| CN107053023A (en) * | 2017-04-27 | 2017-08-18 | 郑州磨料磨具磨削研究所有限公司 | A kind of gum cement and preparation method thereof, hard grinding wheel and preparation method thereof |
| CN108440967A (en) * | 2018-03-13 | 2018-08-24 | 天长市荣盛有机硅科技有限公司 | A kind of anion foamed silastic material |
| CN109796622A (en) * | 2019-01-12 | 2019-05-24 | 高产明 | A kind of preparation method of heat-resisting Open-Cells Silicone Rubber Foam material |
| US10457840B2 (en) | 2010-09-30 | 2019-10-29 | Zephyros, Inc. | Foamed adhesive |
| CN112225938A (en) * | 2020-09-27 | 2021-01-15 | 惠州市峄董塑胶科技有限公司 | Formula and process for foaming various plastics |
| CN112662180A (en) * | 2020-12-10 | 2021-04-16 | 中国工程物理研究院核物理与化学研究所 | Foam type low-density silicon rubber-based flexible neutron shielding material and preparation method thereof |
| CN113980663A (en) * | 2021-11-10 | 2022-01-28 | 四川大学 | High-temperature-resistant self-foaming expansion silicone rubber plugging material and preparation method thereof |
| CN114149688A (en) * | 2021-11-19 | 2022-03-08 | 北京理工大学 | Muscle equivalent material and preparation method and application thereof |
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| CN1850908A (en) * | 2006-06-01 | 2006-10-25 | 四川大学 | Obturator-type silicone rubber foam material, and its preparing method and use |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1850908A (en) * | 2006-06-01 | 2006-10-25 | 四川大学 | Obturator-type silicone rubber foam material, and its preparing method and use |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10457840B2 (en) | 2010-09-30 | 2019-10-29 | Zephyros, Inc. | Foamed adhesive |
| CN102152553A (en) * | 2010-11-24 | 2011-08-17 | 吴江朗科化纤有限公司 | Method for processing silicon rubber composite material |
| CN102584324A (en) * | 2012-01-22 | 2012-07-18 | 深圳市沃尔核材股份有限公司 | Cement flame-retardant foaming thermal insulation plate and production method thereof |
| CN103289412A (en) * | 2013-05-22 | 2013-09-11 | 易宝（福建）高分子材料股份公司 | Silicone rubber closed-cell foamed material and preparation method thereof |
| CN103289412B (en) * | 2013-05-22 | 2017-06-16 | 易宝（福建）高分子材料股份公司 | Silicon rubber closed cell foamed material and preparation method thereof |
| CN104312168B (en) * | 2014-11-07 | 2017-06-13 | 中蓝晨光化工研究设计院有限公司 | A kind of open cell type liquid RTV foam silicone rubber and preparation method thereof |
| CN104312168A (en) * | 2014-11-07 | 2015-01-28 | 中蓝晨光化工研究设计院有限公司 | Porous liquid room temperature vulcanization foam silicone rubber and preparation method thereof |
| CN104725871A (en) * | 2014-12-17 | 2015-06-24 | 苏州锦腾电子科技有限公司 | Foamed silicone rubber and preparation method thereof |
| CN104744946B (en) * | 2015-04-16 | 2017-06-27 | 中国工程物理研究院核物理与化学研究所 | A kind of high temperature resistant type silicon rubber foam material and preparation method thereof |
| CN104744946A (en) * | 2015-04-16 | 2015-07-01 | 中国工程物理研究院核物理与化学研究所 | High-temperature-resistant silicone rubber foam material and preparation method thereof |
| CN104893312A (en) * | 2015-07-01 | 2015-09-09 | 中国工程物理研究院核物理与化学研究所 | Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof |
| CN104893312B (en) * | 2015-07-01 | 2017-12-29 | 中国工程物理研究院核物理与化学研究所 | A kind of composite enhanced high flexibility microporous silicon rubber foam material and preparation method thereof |
| CN105504820A (en) * | 2016-01-07 | 2016-04-20 | 东莞市日源盛橡胶绝缘制品有限公司 | Formula and preparation method of conductive silica gel foam material |
| CN106995610A (en) * | 2016-01-26 | 2017-08-01 | 东莞市希贝实业有限公司 | A kind of foamed silastic material and preparation method thereof |
| CN106349709A (en) * | 2016-08-24 | 2017-01-25 | 江苏天辰新材料股份有限公司 | Low-density microcellular foaming silicone rubber and preparation method thereof |
| CN106336668A (en) * | 2016-09-29 | 2017-01-18 | 中国工程物理研究院核物理与化学研究所 | Self-adhesion silicone rubber foam material and preparation method thereof |
| CN107053023A (en) * | 2017-04-27 | 2017-08-18 | 郑州磨料磨具磨削研究所有限公司 | A kind of gum cement and preparation method thereof, hard grinding wheel and preparation method thereof |
| CN108440967A (en) * | 2018-03-13 | 2018-08-24 | 天长市荣盛有机硅科技有限公司 | A kind of anion foamed silastic material |
| CN109796622A (en) * | 2019-01-12 | 2019-05-24 | 高产明 | A kind of preparation method of heat-resisting Open-Cells Silicone Rubber Foam material |
| CN112225938A (en) * | 2020-09-27 | 2021-01-15 | 惠州市峄董塑胶科技有限公司 | Formula and process for foaming various plastics |
| CN112662180A (en) * | 2020-12-10 | 2021-04-16 | 中国工程物理研究院核物理与化学研究所 | Foam type low-density silicon rubber-based flexible neutron shielding material and preparation method thereof |
| CN113980663A (en) * | 2021-11-10 | 2022-01-28 | 四川大学 | High-temperature-resistant self-foaming expansion silicone rubber plugging material and preparation method thereof |
| CN113980663B (en) * | 2021-11-10 | 2022-08-16 | 四川大学 | High-temperature-resistant self-foaming expansion silicone rubber plugging material and preparation method thereof |
| CN114149688A (en) * | 2021-11-19 | 2022-03-08 | 北京理工大学 | Muscle equivalent material and preparation method and application thereof |
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