CN105331117A - Foamed liquid silicone rubber and preparation method thereof - Google Patents
Foamed liquid silicone rubber and preparation method thereof Download PDFInfo
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- CN105331117A CN105331117A CN201510791410.7A CN201510791410A CN105331117A CN 105331117 A CN105331117 A CN 105331117A CN 201510791410 A CN201510791410 A CN 201510791410A CN 105331117 A CN105331117 A CN 105331117A
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Abstract
The invention discloses a preparation method of foamed liquid silicone rubber. The preparation method comprises steps as follows: 1), a base material prepared from polysiloxane composition and reinforcing filler and is divided into two parts; 2), a catalyst is added to one part of the base material, and a material A is prepared; 3), an inhibitor and a cross-linking agent are added to the other part of the base material, and a material B is prepared; 4), the material A and the material B are mixed, 20%-85% by weight of mixed gas comprising air, oxygen and CO2 is added, preferably, 60% by weight of the mixed gas is added, and a finished foamed liquid silicone rubber product is obtained after heating curing. With the adoption of the preparation method, the prepared foamed rubber has uniform foam size, foams completely, is high in elasticity and toughness, has smooth surface, saves production cost and can be widely applied to every production field of an industrial injection molding process.
Description
Technical field
The present invention relates to a kind of silicon rubber and preparation method thereof, particularly relate to a kind of foamed silastic and preparation method thereof.
Background technology
Silicon rubber is one of important silicone product.Silicon rubber has many uniquenesses and the performance of excellence is widely used in Aeronautics and Astronautics, electric, light industry, machinery, building, chemical industry, medical science, daily necessities etc.Liquid silastic is a class organic silica gel of relative mixed milling type semi-solid state silicon rubber and common self cure single component silica gel.Main existing method is prepared in proportion as whipping agent and rubber composition by the thermoplastic resin hollow bead powder (obtaining low-gravity rubber composition) of the thermoplastic resin hollow bead powder expanded during heating or preexpanding, along with the expansion of thermoplastic resin hollow bead powder, rubber composition is heated and is cured, thus obtains the silicon rubber (see Japanese patent application H5-209080 or US Patent No. 6300383) of foaming.But the method still has problems: operating process is restive, whipping agent is difficult to mixing, thus non-homogeneous expansion is even, and greatly, the elasticity that foams is inadequate for the uneven and proportion change of the foamed silastic abscess-size made.A kind of liquid silicon rubber composition of this area development & production, when solidifying, said composition becomes the problem that the foamed silastic (see patent application publication number CN1303890A) with low-gravity and low heat conductivity to a certain degree solves thermoplastic resin hollow bead powder whipping agent married operation difficulty, and the problem that the proportion change of the foamed silastic of preparation is low with thermal conductivity greatly.But the whipping agent that the method uses still uses the thermoplastic resin hollow bead powder adding thermal expansion, powder-type whipping agent still exists with the inadequate uniformity problem that mixes of silicon rubber, thus the uniformity coefficient of the abscess-size of the silica-gel sponge body produced is inadequate, the proportion of the rubber composition prepared, elasticity, the performances such as hardness need further raising.
Summary of the invention
In order to solve the problem, the invention provides a kind of foamed silastic composition and method of making the same, conventional powder type whipping agent is used to mix even not with silicon rubber to solve, thus the proportion of the foamed silastic composition prepared, elasticity, the performances such as hardness do not reach the technical problem of requirement.
The invention provides a kind of foaming liquid silicon rubber preparation method, comprise the steps:
1) make base material by polysiloxane composition and reinforced filling, be divided into two parts;
2) the finish mix A of catalyzer is added in portion wherein;
3) in another part, inhibitor and the finish mix B of linking agent is added;
Wherein, also comprise step 4) by described material A and material B mixing, and add weight ratio be 20-85% by air, oxygen and CO
2the mixed gas of composition, preferred weight ratio is 60%, obtains foaming liquid silicon rubber finished product after being heating and curing.
Wherein, described step 1) is be polysiloxane composition and the reinforced filling silicon-dioxide of (1) by general formula, after mixing with weight ratio 10:1 ~ 4, low molecule base material is deviate from through thermal treatment and vacuum-treat, obtain base material, wherein, described silicon-dioxide is selected from organosilazanes or silane coupling agent and makes the aerosil after hydrophobic process or precipitated silica;
Wherein, described general formula (1) is:
R
2SiO(SiRR’O)nSiR
2
R is vinyl,
R ' and R are identical or different, are vinyl, methyl, alkyl or phenyl,
N is the polymerization degree (30≤n≤2000).
Wherein, the thermal treatment described in step 1) and vacuum processing step, under maintenance 145-160 DEG C of constant temperature, after first atmospheric agitation 1.5-2.5 hour, stir 2.0-3.5 hour in final vacuum.
Wherein, described step 2) add 0.1%-0.5%(wt% for portion wherein), be the finish mix A of platinum complex compound catalyst of Platinic chloride and tetramethyl divinyl disiloxane polymkeric substance.
Wherein, in the polymkeric substance of described Platinic chloride and tetramethyl divinyl disiloxane, platinum content is 0.32-0.38%(wt%).
Wherein, described step 3) is for adding the organic hydride polysiloxane being not less than 3 hydrogen silicon links of general formula (2) to another part, its hydrogen content is 0.12%-1%(wt%), and 0.8%-4.5%(wt%) the finish mix B of alkynol class inhibitor, preferably, described alkynol class curing inhibitors is selected from 3-methyl-alkynyl-3-alcohol, 3,5-dimethyl-1-alkynyl-3-alcohol, 2-methyl-3-butynyl-2-alcohol and/or 2-phenyl-3-butynyl-2-alcohol;
Wherein, described general formula (2) is:
R
2SiO(SiRR’O)
x(SiHR’O)
ySiR
2
R is vinyl,
R ' and R are identical or different, are vinyl, methyl, alkyl or phenyl,
X and y is the polymerization degree (0≤x≤300) (3≤y≤30).
Wherein, described polysiloxane composition is the composition being selected from following polysiloxane one or more,
I. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane;
II. viscosity is 10000-40000mPas (25 DEG C), contents of ethylene is 0.15%-0.5%(wt%) polysiloxane;
III. viscosity is 1000-2000mPas (25 DEG C), contents of ethylene is 0.3%-1.0%(wt%) polysiloxane;
IV. viscosity is 1000-5000mPas (25 DEG C), contents of ethylene is 1.0%-10%(wt%) polysiloxane.
Wherein, expect in described step 4) that A and material B adds described mixed gas after mixing with weight ratio 1:1,110-180 DEG C of heating obtained foaming liquid silicon rubber finished product after 3-8 minute, and preferably, 160 DEG C of heating, 3 minutes after fixing obtain finished product.
Wherein, described mixed gas consist of weight percent meter: 15% ~ 25% air, 30% ~ 40% oxygen, 40% ~ 50%CO
2, preferably, the composition weight percent of mixed gas is counted: 20% air, 35% oxygen, 45%CO
2.
The present invention also comprises a kind of foaming liquid rubber composition prepared by above-mentioned preparation method.
Compared with the thermoplastic resin powder's whipping agent adopted with tradition, preparation method of the present invention, use mixing air as whipping agent, full and uniform the mixing of whipping agent and silicon rubber can be made, thus the bubble produced in foaming process is even, colloidal foam size uniform after foaming, completely, elasticity is high, toughness is large, smooth surface in foaming, and preparation method of the present invention employs the mixed gas of easy easy acquisition as whipping agent, has also saved production cost greatly.Therefore the high-performance foamed silica gel of preparation method's production of the present invention, can be widely used in each production field of industrial Shooting Technique.
Embodiment
, described part all refers to mass parts in following specific embodiment if no special instructions, and described per-cent is weight percentage.
Comparative example 1: adopt thermoplastic hollow particles's powder preparation foaming liquid silicon rubber
Step 1): the polysiloxane composition I adding polysiloxane end-blocking in strong stirring mixing machine. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage is 20 parts; With II. viscosity is 10000-40000mPas (25 DEG C), contents of ethylene is 0.15%-0.5%(wt%) polysiloxane dosage be 20 parts.
And then add the aerosil that hydrophobic process done by hexamethyldisilazane coupling agent, dosage 20 parts, be uniformly mixed agglomerating 1 hour.
Then be warming up to about 150 DEG C constant temperature atmospheric agitation 2 hours, then vacuum stirring stopped vacuum after 3 hours under these about 150 DEG C constant temperatures.
Add I after being cooled to 90 DEG C afterwards. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage 15 parts, after Homogeneous phase mixing, discharging grinds to form base-material, is also low molecule base material, and this base-material is divided into two parts.
Step 2) add the polymkeric substance that platinum content is (0.32wt%) Platinic chloride and tetramethyl divinyl disiloxane wherein in a base-material, dosage is 0.35 part of finish mix A of platinum complex compound.
It is 0.12%-1%(wt% that step 3) adds hydrogen content in another part of base-material) polysiloxane, dosage is 3 parts; Alkynol class inhibitor 3, the 5-dimethyl-1-alkynyl-3-alcohol of 2%, dosage is 0.04 part; Microballoon hollow foamed particle powder (this microballon of pine F-36D dry powder type, the meeting of this grease of pine pharmacy strain formula) dosage is 5 parts, makes B;
A and B mixing is added high speed dispersor according to the ratio of A:B=1:1 and fully mixes by step 4), obtain foaming liquid silica-gel composition, the viscosity of composition is greatly about 250000mPas, hold in Flat bottom container, put into oven temperature to be heating and curing about 10 minutes time at about 100 DEG C, obtain solidifying foamed silastic.
The thickness of foamed glue prepared by the method be do not send out before about 1.5 times, and foamed glue sections observation is foamed more uneven as seen, elasticity and toughness poor.
Embodiment 2: adopt the mixing air whipping agent (wt%) of 20% to prepare foaming liquid silicon rubber
Step 1): add I at strong stirring mixing machine. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage is 20 parts; With II. viscosity is 10000-40000mPas (25 DEG C), contents of ethylene is 0.15%-0.5%(wt%) polysiloxane dosage be 20 parts.
And then add the aerosil that hydrophobic process done by hexamethyldisilazane coupling agent, dosage 20 parts, be uniformly mixed agglomerating 1 hour.
Then be warming up to about 150 DEG C constant temperature atmospheric agitation 2 hours, then vacuum stirring stopped vacuum after 3 hours under these about 150 DEG C constant temperatures.
Add I after being cooled to 90 DEG C afterwards. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage 15 parts, after Homogeneous phase mixing, discharging grinds to form base-material, is also low molecule base material, and this base-material is divided into two parts.
Step 2) add the polymkeric substance that platinum content is (0.32wt%) Platinic chloride and tetramethyl divinyl disiloxane wherein in a base-material, dosage is 0.35 part of finish mix A of platinum complex compound.
It is 0.12%-1%(wt% that step 3) adds hydrogen content in another part of base-material) polysiloxane, dosage is 3 parts; Alkynol class inhibitor 3, the 5-dimethyl-1-alkynyl-3-alcohol of 2%, dosage is 0.04 part of finish mix B.
A and B mixing is added high speed dispersor and fully mixes according to the ratio of A:B=1:1 by step 4), then add weight percent be 20% mixed gas (mixed gas by 15% air, 35% oxygen, 50%CO
2composition), obtain foaming liquid silica-gel composition, the viscosity of composition is greatly about 200000mPas, hold in Flat bottom container, put into oven temperature to be heating and curing about 8 minutes time at 110 DEG C, the thickness obtaining solidifying post-foaming glue be do not send out before about 4.5 times, and it is comparatively even foamed glue sections observation to be foamed as seen, elasticity and toughness better.
Embodiment 3: adopt the mixing air whipping agent (wt%) of 60% to prepare foaming liquid silicon rubber
Step 1): add III at strong stirring mixing machine. viscosity is 1000-2000mPas (25 DEG C), contents of ethylene is 0.3%-1.0%(wt%) polysiloxane, dosage is 30 parts; With II. viscosity is 10000-40000mPas (25 DEG C), contents of ethylene is 0.15%-0.5%(wt%) polysiloxane dosage be 20 parts, dosage is 15 parts;
And then add the aerosil that hydrophobic process done by hexamethyldisilazane coupling agent, dosage 20 parts, be uniformly mixed agglomerating 1 hour.
Then be warming up to about 150 DEG C constant temperature atmospheric agitation 2 hours, then vacuum stirring stopped vacuum after 3 hours under these about 150 DEG C constant temperatures.
Add I after being cooled to 90 DEG C. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage 15 parts, after Homogeneous phase mixing, discharging grinds to form base-material, is also low molecule base material, and this base-material is divided into two parts.
Step 2) portion adds the polymkeric substance that platinum content is (0.375wt%) Platinic chloride and tetramethyl divinyl disiloxane, and dosage is 0.25 part of finish mix A of platinum complex compound.
It is 0.12%-1%(wt% that step 3) portion adds hydrogen content) low polymerization degree polysiloxane, dosage is 3 parts; Alkynol class inhibitor 3, the 5-dimethyl-1-alkynyl-3-alcohol of 2%, dosage is 0.04 part, finish mix B.
A and B mixing is added high speed dispersor and fully mixes according to the ratio of A:B=1:1 by step 4), then add weight percent be 60% mixed gas (mixed gas by 20% air, 35% oxygen, 45%CO
2composition), obtain foaming liquid silica-gel composition, the viscosity of composition is greatly about 150000mPas, hold in Flat bottom container, put into oven temperature to be heating and curing about 5 minutes time at 150 DEG C, the thickness obtaining solidifying post-foaming glue be do not send out before about 8 times, and it is comparatively even foamed glue sections observation to be foamed as seen, elasticity and toughness better.
Embodiment 4: adopt the mixing air whipping agent (wt%) of 80% to prepare foaming liquid silicon rubber
Step 1): add III at strong stirring mixing machine. viscosity is 1000-2000mPas (25 DEG C), contents of ethylene is 0.3%-1.0%(wt%) polysiloxane, dosage is 30 parts, and I. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane, dosage is 15 parts.
Add the aerosil that hydrophobic process done by hexamethyldisilazane coupling agent, dosage 20 parts, be uniformly mixed agglomerating 1 hour.
Then be warming up to about 150 DEG C constant temperature atmospheric agitation 2 hours, then vacuum stirring stopped vacuum after 3 hours under these about 150 DEG C constant temperatures.
Add IV after being cooled to 90 DEG C. viscosity is 1000-5000mPas (25 DEG C), contents of ethylene is 1.0%-10%(wt%) polysiloxane, dosage 5 parts, after Homogeneous phase mixing, discharging grinds to form base-material; And base-material is divided into two parts;
Step 2) portion adds the polymkeric substance that platinum content is (0.375wt%) Platinic chloride and tetramethyl divinyl disiloxane, and dosage is 0.25 part of finish mix A of platinum complex compound.
It is 0.12%-1%(wt% that step 3) portion adds hydrogen content) low polymerization degree polysiloxane, dosage is 3 parts; Alkynol class inhibitor 3, the 5-dimethyl-1-alkynyl-3-alcohol of 2%, dosage is 0.04 part, finish mix B.
A and B mixing is added high speed dispersor and fully mixes according to the ratio of A:B=1:1 by step 4), then add weight percent be 80% mixed gas (mixed gas by 25% air, 35% oxygen, 40%CO
2composition), obtain foaming liquid silica-gel composition, the viscosity of composition is greatly about 50000mPas, hold in Flat bottom container, put into oven temperature to be heating and curing about 3 minutes time at 180 DEG C, the thickness obtaining solidifying post-foaming glue be do not send out before about 6 times, and it is comparatively even foamed glue sections observation to be foamed as seen, elasticity and toughness better.
The successful that embodiment 2-4 uses mixed gas of the present invention to carry out foaming as whipping agent is better than traditional method, as comparative example 1 uses thermoplastic resin microspheres to foam, adopt the preparation method of embodiment of the present invention 2-4, whipping agent can with liquid silica gel evenly and fully mix, after being fully mixed into mixed gas, bubble in liquid silica gel keeps certain tension force and bubble is even, make the colloid elasticity after foaming high, toughness is large, smooth surface, foam size is even, foaming completely, and use preparation method of the present invention also to save cost greatly, the high performance foamed silica gel that the closed pore perforate of producing is evenly distributed, industrial Shooting Technique can be widely used in and produce multiple product.
The discovery that the present invention is also surprised, use the air of different ratios, oxygen and titanium dioxide mixed gas use as whipping agent, as long as ratio changes within the scope of aforementioned proportion, all can play good foaming effect, it is little that the concrete ratio of the component of its mixed gas affects difference to foaming effect, but the add-on of mixed gas affects significantly on foaming effect, in the scope of mixed gas adding weight ratio 20%-80%, have than the performance of the foamed silica gel adopting traditional thermoplastic resin microspheres's foaming agent foam manufacture and significantly improve, when preferably adding ratio of gas mixture and being 60%, effect is optimum, foam thickness is up to 8 times of thickness when not foaming, colloid is more flexible, toughness, foam size is also more even.In addition, contriver also finds, traditional preparation methods generally adopts less than 100 DEG C curing moldings, and the inventive method 110-180 DEG C of hot setting is shaping, this also to a certain degree improves the coefficient of expansion and the speed of expansion of silica gel, improve the elastic performance of foamed silica gel, and accelerate speed of response, the High performance silica gel that therefore prepared by method of the present invention is applicable to field more widely.
Above embodiment is only in order to illustrate the present invention and unrestricted, and the present invention is also not limited in above-mentioned citing, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in right of the present invention.
Claims (10)
1. a foaming liquid silicon rubber preparation method, comprises the steps:
1) make base material by polysiloxane composition and reinforced filling, be divided into two parts;
2) the finish mix A of catalyzer is added in portion wherein;
3) in another part, inhibitor and the finish mix B of linking agent is added;
It is characterized in that, also comprise step 4) by described material A and material B mixing, and add weight ratio be 20-85% by air, oxygen and CO
2the mixed gas of composition, preferred weight ratio is 60%, obtains foaming liquid silicon rubber finished product after being heating and curing.
2. foaming liquid silicon rubber preparation method according to claim 1, it is characterized in that, described step 1) is be polysiloxane composition and the reinforced filling silicon-dioxide of (1) by general formula, after mixing with weight ratio 10:1 ~ 4, low molecule base material is deviate from through thermal treatment and vacuum-treat, obtain base material, wherein, described silicon-dioxide is selected from organosilazanes or silane coupling agent and makes the aerosil after hydrophobic process or precipitated silica;
Wherein, described general formula (1) is:
R
2SiO(SiRR’O)nSiR
2
R is vinyl,
R ' and R are identical or different, are vinyl, methyl, alkyl or phenyl,
N is the polymerization degree (30≤n≤2000).
3. foaming liquid silicon rubber preparation method according to claim 2, it is characterized in that thermal treatment described in step 1) and vacuum processing step are under keeping 145-160 DEG C of constant temperature, first atmospheric agitation, after 1.5-2.5 hour, stirs 2.0-3.5 hour in final vacuum.
4. foaming liquid silicon rubber preparation method according to claim 1, it is characterized in that, described step 2) add 0.1%-0.5%(wt% for portion wherein), be the finish mix A of platinum complex compound catalyst of Platinic chloride and tetramethyl divinyl disiloxane polymkeric substance.
5. foaming liquid silicon rubber preparation method according to claim 4, is characterized in that, in the polymkeric substance of described Platinic chloride and tetramethyl divinyl disiloxane, platinum content is 0.32-0.38%(wt%).
6. foaming liquid silicon rubber preparation method according to claim 1, it is characterized in that, described step 3) is for adding the organic hydride polysiloxane being not less than 3 hydrogen silicon links of general formula (2) to another part, its hydrogen content is 0.12%-1%(wt%), and 0.8%-4.5%(wt%) the finish mix B of alkynol class inhibitor, preferably, described alkynol class curing inhibitors is selected from 3-methyl-alkynyl-3-alcohol, 3,5-dimethyl-1-alkynyl-3-alcohol, 2-methyl-3-butynyl-2-alcohol and/or 2-phenyl-3-butynyl-2-alcohol;
Wherein, described general formula (2) is:
R
2SiO(SiRR’O)
x(SiHR’O)
ySiR
2
R is vinyl,
R ' and R are identical or different, are vinyl, methyl, alkyl or phenyl,
X and y is the polymerization degree (0≤x≤300) (3≤y≤30).
7. foaming liquid silicon rubber preparation method according to claim 1 and 2, is characterized in that, described polysiloxane composition is the composition being selected from following polysiloxane one or more,
I. viscosity is 5000-10000mPas (25 DEG C), contents of ethylene is 0.25%-0.5%(wt%) polysiloxane;
II. viscosity is 10000-40000mPas (25 DEG C), contents of ethylene is 0.15%-0.5%(wt%) polysiloxane;
III. viscosity is 1000-2000mPas (25 DEG C), contents of ethylene is 0.3%-1.0%(wt%) polysiloxane;
IV. viscosity is 1000-5000mPas (25 DEG C), contents of ethylene is 1.0%-10%(wt%) polysiloxane.
8. foaming liquid silicon rubber preparation method according to claim 1, it is characterized in that, expect in described step 4) that A and material B adds described mixed gas after mixing with weight ratio 1:1,110-180 DEG C of heating obtained foaming liquid silicon rubber finished product after 3-8 minute, preferably, 160 DEG C of heating, 3 minutes after fixing obtain finished product.
9. foaming liquid silicon rubber preparation method according to claim 8, is characterized in that, described mixed gas consist of weight percent meter: 15% ~ 25% air, 30% ~ 40% oxygen, 40% ~ 50%CO
2, preferably, the composition weight percent of mixed gas is counted: 20% air, 35% oxygen, 45%CO
2.
10. the foaming liquid rubber composition prepared according to the preparation method in claim 1-9 described in any one.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815288A (en) * | 2017-10-19 | 2018-03-20 | 东莞市兆科电子材料科技有限公司 | Adiabatic gum, heat shield, the preparation method of the preparation method of adiabatic gum and heat shield |
| CN108129692A (en) * | 2017-12-25 | 2018-06-08 | 广东标美硅氟新材料有限公司 | A kind of foamed silastic material and its preparation method and application |
| CN110872440A (en) * | 2018-08-30 | 2020-03-10 | 嘉兴未来新材料科技有限公司 | Foam material for bra |
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|---|---|---|---|---|
| EP0604926A1 (en) * | 1992-12-28 | 1994-07-06 | Dow Corning Toray Silicone Company Ltd. | Method for fabricating foam gaskets from polyorganosiloxane compositions |
| CN101983989A (en) * | 2010-11-01 | 2011-03-09 | 深圳市森日有机硅材料有限公司 | Liquid silicon rubber composition and preparation method thereof |
| CN103965640A (en) * | 2013-12-05 | 2014-08-06 | 宁波银瑞有机硅科技发展有限公司 | Foamed liquid silicon rubber and preparation method thereof |
-
2015
- 2015-11-17 CN CN201510791410.7A patent/CN105331117A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0604926A1 (en) * | 1992-12-28 | 1994-07-06 | Dow Corning Toray Silicone Company Ltd. | Method for fabricating foam gaskets from polyorganosiloxane compositions |
| CN101983989A (en) * | 2010-11-01 | 2011-03-09 | 深圳市森日有机硅材料有限公司 | Liquid silicon rubber composition and preparation method thereof |
| CN103965640A (en) * | 2013-12-05 | 2014-08-06 | 宁波银瑞有机硅科技发展有限公司 | Foamed liquid silicon rubber and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815288A (en) * | 2017-10-19 | 2018-03-20 | 东莞市兆科电子材料科技有限公司 | Adiabatic gum, heat shield, the preparation method of the preparation method of adiabatic gum and heat shield |
| CN108129692A (en) * | 2017-12-25 | 2018-06-08 | 广东标美硅氟新材料有限公司 | A kind of foamed silastic material and its preparation method and application |
| CN108129692B (en) * | 2017-12-25 | 2020-11-10 | 广东标美硅氟新材料有限公司 | Foaming silicon rubber material and preparation method and application thereof |
| CN110872440A (en) * | 2018-08-30 | 2020-03-10 | 嘉兴未来新材料科技有限公司 | Foam material for bra |
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Application publication date: 20160217 |
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