CN106750657A - A kind of cold resistant rubber encapsulant - Google Patents
A kind of cold resistant rubber encapsulant Download PDFInfo
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- CN106750657A CN106750657A CN201611225062.8A CN201611225062A CN106750657A CN 106750657 A CN106750657 A CN 106750657A CN 201611225062 A CN201611225062 A CN 201611225062A CN 106750657 A CN106750657 A CN 106750657A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2312/00—Crosslinking
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a kind of cold resistant rubber encapsulant, its raw material includes by weight：20 30 parts of polyether types of polyurethane rubber, 20 30 parts of nitrile rubber, 10 20 parts of methyl vinyl silicone rubber, 10 20 parts of polyimide resin, 30 50 parts of modified wood powder, 48 parts of boron oxide, 6 12 parts of sepiolite powder, 5 10 parts of diatomite, 48 parts of zinc oxide, 24 parts of pine tar, 24 parts of stearic acid, 24 parts of antioxidant A, 4', 424 parts of dithio morpholines, 24 parts of plasticizer, 13 parts of tetramethylthiuram disulfide, 1.5 2.5 parts of cumyl peroxide, 24 parts of sulphur.Good sealing effect of the present invention, compression set is small, and resistance to low temperature is good, and bulk density is big, and excellent in abrasion resistance does not produce leakage, long service life.
Description
Technical field
The present invention relates to encapsulant technical field, more particularly to a kind of cold resistant rubber encapsulant.
Background technology
Household cleaning appliances by hot water, often because of water temperature over-high, the rubber seal compression of part joint be deteriorated and
Sealing effectiveness fails, and produces leakage, and ultimately causing cleaning equipment can not normally use, cold additionally, due to northern market winter,
Outdoor environment can reach -40 DEG C, cause body of rubber material embrittlement, lose resilience, cause seal fails, it would be highly desirable to solve.
The content of the invention
Based on the technical problem that background technology is present, the present invention proposes a kind of cold resistant rubber encapsulant, sealing effect
Really good, compression set is small, and resistance to low temperature is good, and bulk density is big, and excellent in abrasion resistance does not produce leakage, long service life.
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
Glue 20-30 parts, nitrile rubber 20-30 parts, methyl vinyl silicone rubber 10-20 parts, polyimide resin 10-20 parts, innovation wood
Powder 30-50 parts, boron oxide 4-8 parts, sepiolite powder 6-12 parts, diatomite 5-10 parts, zinc oxide 4-8 parts, pine tar 2-4 parts, firmly
Resin acid 2-4 parts, antioxidant A 2-4 parts, 2-4 parts of 4', 4- dithio morpholine, plasticizer 2-4 parts, tetramethylthiuram disulfide
1-3 parts, cumyl peroxide 1.5-2.5 parts, sulphur 2-4 parts.
Preferably, the weight of polyether types of polyurethane rubber, nitrile rubber, methyl vinyl silicone rubber, polyimide resin
Than being 22-26：24-28：13-17：14-16.
Preferably, modified wood powder, boron oxide, sepiolite powder, diatomaceous weight ratio are 35-45：5-7：8-10：6-8.
Preferably, its raw material includes by weight：Polyether types of polyurethane rubber 22-26 parts, nitrile rubber 24-28 parts, first
13-17 parts of base vinylsiloxane rubber, polyimide resin 14-16 parts, modified wood powder 35-45 parts, boron oxide 5-7 parts, sepiolite
Powder 8-10 parts, diatomite 6-8 parts, zinc oxide 5-7 parts, pine tar 2.5-3.5 parts, stearic acid 2.5-3.5 parts, antioxidant A 2.5-
3.5 parts, 2.5-3.5 parts of 4', 4- dithio morpholine, plasticizer 2.5-3.5 parts, tetramethylthiuram disulfide 1.5-2.5 parts,
Cumyl peroxide 1.8-2.2 parts, sulphur 2.5-3.5 parts.
Preferably, modified wood powder is prepared using following technique：By in wood powder feeding vacuum drying oven, heat up, insulation charing is down to
Room temperature, adds nano silicon to be well mixed, and continues to be fed into vacuum drying oven, is warming up to, and is incubated, cooling, insulation, natural cooling
Obtain pre-processing wood powder to room temperature；By Gelatin in water, pretreatment wood powder stirring is added, add xanthans stirring, regulation
System pH is 6.2-6.5, adds glutaraldehyde stirring, is dried to obtain modified wood powder.
Preferably, modified wood powder is prepared using following technique：By in wood powder feeding vacuum drying oven, 750-850 DEG C is warming up to, protected
Temperature charing 25-35min, is down to room temperature, adds nano silicon to be well mixed, in continuing to be fed into vacuum drying oven, with 15-20 DEG C/
The speed of min is warming up to 1200-1400 DEG C, is incubated 35-55min, is down to 450-500 DEG C, is incubated 10-20min, naturally cools to
Room temperature obtains pre-processing wood powder；By Gelatin in water, pretreatment wood powder stirring 2-4min is added, mixing speed is 450-
850r/min, adds xanthans stirring 80-120min, and mixing speed is 1500-1800r/min, and regulation system pH value is 6.2-
6.5, glutaraldehyde stirring 60-100min is added, it is dried to obtain modified wood powder.
Preferably, modified wood powder is prepared using following technique：By weight by 20-30 parts of wood powder feeding vacuum drying oven, rise
To 750-850 DEG C, insulation charing 25-35min is down to room temperature to temperature, adds 4-8 parts of nano silicon to be well mixed, and continues to send
Enter in vacuum drying oven, 1200-1400 DEG C is warming up to the speed of 15-20 DEG C/min, be incubated 35-55min, be down to 450-500 DEG C, protect
Warm 10-20min, naturally cools to room temperature and obtains pre-processing wood powder；By weight by 15-25 parts of Gelatin in 45-65 parts of water
In, 50-70 parts of pretreatment wood powder stirring 2-4min is added, mixing speed is 450-850r/min, adds 8-16 parts of xanthans to stir
80-120min is mixed, mixing speed is 1500-1800r/min, and regulation system pH value is 6.2-6.5, adds 0.4-1 parts of glutaraldehyde
Stirring 60-100min, is dried to obtain modified wood powder.
The present invention is obtained using conventional fabrication process.
The present invention is mutual using nitrile rubber, polyether types of polyurethane rubber, methyl vinyl silicone rubber, polyimide resin
Synergy, the crosslinking curing in the case where sulphur, tetramethylthiuram disulfide, N cyclohexyl 2 benzothiazole sulfenamide coordinate,
Resistance to low temperature of the invention is improved, increases bulk density of the invention, reduce the gap between rubber molecule, improve this
The wearability and intensity of invention, substantially increase service life of the invention；In modified wood powder of the invention, wood powder is by carbonization
Acted under certain technique with nano silicon afterwards and form whisker, in one-dimensional chain bead shaped nano whisker, heat endurance is good, filled
Under excellent performance, with gelatin, xanthans effect, it is crosslinked under glutaraldehyde effect, may be such that pretreatment wood powder is effectively wrapped
Wrap up in, surface compact, and with good mobility, be difficult the moisture absorption, wearability is good；Modified wood powder can strengthen sulphur, curing four
Methyl thiuram, N cyclohexyl 2 benzothiazole sulfenamide mobility, the sulfidization molding time greatly shorten, and bending strength is high,
Resistance to elevated temperatures is good, and resilience is excellent, and compression set is small；Modified wood powder, diatomite, boron oxide, sepiolite powder coordinate, greatly
Wearability of the invention is improve greatly, and heat resistance is good, and compression is small under high temperature, good sealing effect, and leakage is not produced, uses
Long lifespan.
Specific embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
20 parts of glue, 30 parts of nitrile rubber, 10 parts of methyl vinyl silicone rubber, 20 parts of polyimide resin, 30 parts of modified wood powder, boron oxide
8 parts, 6 parts of sepiolite powder, 10 parts of diatomite, 4 parts of zinc oxide, 4 parts of pine tar, 2 parts of stearic acid, 4 parts of antioxidant A, the sulphur of 4', 4- bis-
For 2 parts of dimorpholine, 4 parts of plasticizer, 1 part of tetramethylthiuram disulfide, 2.5 parts of cumyl peroxide, 2 parts of sulphur.
Embodiment 2
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
30 parts of glue, 20 parts of nitrile rubber, 20 parts of methyl vinyl silicone rubber, 10 parts of polyimide resin, 50 parts of modified wood powder, boron oxide
4 parts, 12 parts of sepiolite powder, 5 parts of diatomite, 8 parts of zinc oxide, 2 parts of pine tar, 4 parts of stearic acid, 2 parts of antioxidant A, the sulphur of 4', 4- bis-
For 4 parts of dimorpholine, 2 parts of plasticizer, 3 parts of tetramethylthiuram disulfide, 1.5 parts of cumyl peroxide, 4 parts of sulphur.
Modified wood powder is prepared using following technique：By in wood powder feeding vacuum drying oven, heat up, room temperature is down in insulation charing, plus
Enter nano silicon to be well mixed, continue to be fed into vacuum drying oven, be warming up to, be incubated, cooling, insulation naturally cools to room temperature
Obtain pre-processing wood powder；By Gelatin in water, pretreatment wood powder stirring is added, add xanthans stirring, regulation system pH
It is 6.2-6.5 to be worth, and adds glutaraldehyde stirring, is dried to obtain modified wood powder.
Embodiment 3
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
22 parts of glue, 28 parts of nitrile rubber, 13 parts of methyl vinyl silicone rubber, 16 parts of polyimide resin, 35 parts of modified wood powder, boron oxide
7 parts, 8 parts of sepiolite powder, 8 parts of diatomite, 5 parts of zinc oxide, 3.5 parts of pine tar, 2.5 parts of stearic acid, 3.5 parts of antioxidant A, 4',
2.5 parts of 4- dithio morpholines, 3.5 parts of plasticizer, 1.5 parts of tetramethylthiuram disulfide, 2.2 parts of cumyl peroxide,
2.5 parts of sulphur.
Modified wood powder is prepared using following technique：By in wood powder feeding vacuum drying oven, 800 DEG C, insulation charing are warming up to
30min, is down to room temperature, adds nano silicon to be well mixed, and continues to be fed into vacuum drying oven, is heated up with the speed of 18 DEG C/min
To 1300 DEG C, 45min is incubated, is down to 480 DEG C, be incubated 15min, naturally cooled to room temperature and obtain pre-processing wood powder；Gelatin is molten
In Xie Yushui, pretreatment wood powder stirring 3min is added, mixing speed is 650r/min, adds xanthans stirring 100min, stirring
Speed is 1700r/min, and regulation system pH value is 6.2-6.5, adds glutaraldehyde stirring 80min, is dried to obtain modified wood powder.
Embodiment 4
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
26 parts of glue, 24 parts of nitrile rubber, 17 parts of methyl vinyl silicone rubber, 14 parts of polyimide resin, 45 parts of modified wood powder, boron oxide
5 parts, 10 parts of sepiolite powder, 6 parts of diatomite, 7 parts of zinc oxide, 2.5 parts of pine tar, 3.5 parts of stearic acid, 2.5 parts of antioxidant A, 4',
3.5 parts of 4- dithio morpholines, 2.5 parts of plasticizer, 2.5 parts of tetramethylthiuram disulfide, 1.8 parts of cumyl peroxide,
3.5 parts of sulphur.
Modified wood powder is prepared using following technique：By weight by 20 parts of wood powders feeding vacuum drying ovens, 850 DEG C are warming up to,
Insulation charing 25min, is down to room temperature, adds 8 parts of nano silicons to be well mixed, in continuing to be fed into vacuum drying oven, with 15 DEG C/
The speed of min is warming up to 1400 DEG C, is incubated 35min, is down to 500 DEG C, is incubated 10min, naturally cools to room temperature and is pre-processed
Wood powder；By weight by 25 parts of Gelatins in 45 parts of water, 70 parts of pretreatment wood powder stirring 2min are added, mixing speed is
850r/min, adds 8 parts of xanthans stirring 120min, and mixing speed is 1500r/min, and regulation system pH value is 6.2-6.5, plus
Enter 1 part of glutaraldehyde stirring 60min, be dried to obtain modified wood powder.
Embodiment 5
A kind of cold resistant rubber encapsulant proposed by the present invention, its raw material includes by weight：EU rubber
24 parts of glue, 26 parts of nitrile rubber, 15 parts of methyl vinyl silicone rubber, 15 parts of polyimide resin, 40 parts of modified wood powder, boron oxide
6 parts, 9 parts of sepiolite powder, 7 parts of diatomite, 6 parts of zinc oxide, 3 parts of pine tar, 3 parts of stearic acid, 3 parts of antioxidant A, the sulphur of 4', 4- bis-
For 3 parts of dimorpholine, 3 parts of plasticizer, 2 parts of tetramethylthiuram disulfide, 2 parts of cumyl peroxide, 3 parts of sulphur.
Modified wood powder is prepared using following technique：By weight by 30 parts of wood powders feeding vacuum drying ovens, 750 DEG C are warming up to,
Insulation charing 35min, is down to room temperature, adds 4 parts of nano silicons to be well mixed, in continuing to be fed into vacuum drying oven, with 20 DEG C/
The speed of min is warming up to 1200 DEG C, is incubated 55min, is down to 450 DEG C, is incubated 10min, naturally cools to room temperature and is pre-processed
Wood powder；By weight by 25 parts of Gelatins in 45 parts of water, 70 parts of pretreatment wood powder stirring 2min are added, mixing speed is
850r/min, adds 8 parts of xanthans stirring 120min, and mixing speed is 1500r/min, and regulation system pH value is 6.2-6.5, plus
Enter 1 part of glutaraldehyde stirring 60min, be dried to obtain modified wood powder.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of cold resistant rubber encapsulant, it is characterised in that its raw material includes by weight：Polyether types of polyurethane rubber
20-30 parts, nitrile rubber 20-30 parts, methyl vinyl silicone rubber 10-20 parts, polyimide resin 10-20 parts, modified wood powder
It is 30-50 parts, boron oxide 4-8 parts, sepiolite powder 6-12 parts, diatomite 5-10 parts, zinc oxide 4-8 parts, pine tar 2-4 parts, stearic
It is sour 2-4 parts, antioxidant A 2-4 parts, 2-4 parts of 4', 4- dithio morpholine, plasticizer 2-4 parts, tetramethylthiuram disulfide 1-3
Part, cumyl peroxide 1.5-2.5 parts, sulphur 2-4 parts.
2. cold resistant rubber encapsulant according to claim 1, it is characterised in that polyether types of polyurethane rubber, butyronitrile rubber
Glue, methyl vinyl silicone rubber, the weight ratio of polyimide resin are 22-26：24-28：13-17：14-16.
3. cold resistant rubber encapsulant according to claim 1 or claim 2, it is characterised in that modified wood powder, boron oxide, Hai Pao
Stone flour, diatomaceous weight ratio are 35-45：5-7：8-10：6-8.
4. the cold resistant rubber encapsulant according to claim any one of 1-3, it is characterised in that its raw material is wrapped by weight
Include：Polyether types of polyurethane rubber 22-26 parts, nitrile rubber 24-28 parts, methyl vinyl silicone rubber 13-17 parts, polyimides tree
Fat 14-16 parts, modified wood powder 35-45 parts, boron oxide 5-7 parts, sepiolite powder 8-10 parts, diatomite 6-8 parts, zinc oxide 5-7 parts,
Pine tar 2.5-3.5 parts, stearic acid 2.5-3.5 parts, antioxidant A 2.5-3.5 parts, 2.5-3.5 parts of 4', 4- dithio morpholine,
Plasticizer 2.5-3.5 parts, tetramethylthiuram disulfide 1.5-2.5 parts, cumyl peroxide 1.8-2.2 parts, sulphur 2.5-
3.5 parts.
5. the cold resistant rubber encapsulant according to claim any one of 1-4, it is characterised in that modified wood powder is using as follows
It is prepared by technique：By in wood powder feeding vacuum drying oven, heat up, room temperature is down in insulation charing, adds nano silicon well mixed,
Continue to be fed into vacuum drying oven, be warming up to, be incubated, cooling, insulation naturally cools to room temperature and obtains pre-processing wood powder；Gelatin is molten
In Xie Yushui, pretreatment wood powder stirring is added, add xanthans stirring, regulation system pH value is 6.2-6.5, adds glutaraldehyde to stir
Mix, be dried to obtain modified wood powder.
6. the cold resistant rubber encapsulant according to claim any one of 1-5, it is characterised in that modified wood powder is using as follows
It is prepared by technique：In wood powder feeding vacuum drying oven, 750-850 DEG C will be warming up to, and insulation charing 25-35min is down to room temperature, and addition is received
Rice silica is well mixed, and continues to be fed into vacuum drying oven, and 1200-1400 DEG C, insulation are warming up to the speed of 15-20 DEG C/min
35-55min, is down to 450-500 DEG C, is incubated 10-20min, naturally cools to room temperature and obtains pre-processing wood powder；By Gelatin in
In water, pretreatment wood powder stirring 2-4min is added, mixing speed is 450-850r/min, adds xanthans stirring 80-120min,
Mixing speed is 1500-1800r/min, and regulation system pH value is 6.2-6.5, adds glutaraldehyde stirring 60-100min, dry
To modified wood powder.
7. the cold resistant rubber encapsulant according to claim any one of 1-6, it is characterised in that modified wood powder is using as follows
It is prepared by technique：By weight 750-850 DEG C will be warming up in 20-30 parts of wood powder feeding vacuum drying oven, insulation charing 25-35min,
It is down to room temperature, adds 4-8 part nano silicon well mixed, in continuing to be fed into vacuum drying oven, with the speed liter of 15-20 DEG C/min
Temperature is incubated 35-55min to 1200-1400 DEG C, is down to 450-500 DEG C, is incubated 10-20min, naturally cools to room temperature and obtains pre-
Treatment wood powder；By weight by 15-25 parts of Gelatin in 45-65 parts of water, 50-70 parts of pretreatment wood powder stirring 2- is added
4min, mixing speed is 450-850r/min, adds 8-16 parts of xanthans stirring 80-120min, and mixing speed is 1500-
1800r/min, regulation system pH value is 6.2-6.5, adds 0.4-1 parts of glutaraldehyde stirring 60-100min, is dried to obtain innovation wood
Powder.
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| CN201611225062.8A CN106750657A (en) | 2016-12-27 | 2016-12-27 | A kind of cold resistant rubber encapsulant |
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| CN201611225062.8A CN106750657A (en) | 2016-12-27 | 2016-12-27 | A kind of cold resistant rubber encapsulant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107183305A (en) * | 2017-06-08 | 2017-09-22 | 全椒县崇明米业有限公司 | A kind of preparation method for improving rice protein yield |
| CN108034261A (en) * | 2017-12-25 | 2018-05-15 | 全椒县新华机械有限责任公司 | A kind of good diesel engine oil seal of tube coil preparation method of thermal stability |
| CN109021540A (en) * | 2018-06-28 | 2018-12-18 | 芜湖卓越线束系统有限公司 | The anti-aging compounded rubber and preparation method thereof that resists cold for automotive wire bundle |
| CN110105742A (en) * | 2018-02-01 | 2019-08-09 | 中国石油化工股份有限公司 | Polyurethane foamed material of skin-core structure and preparation method thereof and sealing material |
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| CN103319819A (en) * | 2013-05-27 | 2013-09-25 | 镇江春环密封件集团有限公司 | Rubber sealing member |
| CN104962071A (en) * | 2015-07-25 | 2015-10-07 | 长泰鑫润橡塑有限公司 | Sealing rubber ring |
| CN105295130A (en) * | 2015-11-02 | 2016-02-03 | 苏州国泰科技发展有限公司 | High-sealing rubber material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103319819A (en) * | 2013-05-27 | 2013-09-25 | 镇江春环密封件集团有限公司 | Rubber sealing member |
| CN104962071A (en) * | 2015-07-25 | 2015-10-07 | 长泰鑫润橡塑有限公司 | Sealing rubber ring |
| CN105295130A (en) * | 2015-11-02 | 2016-02-03 | 苏州国泰科技发展有限公司 | High-sealing rubber material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107183305A (en) * | 2017-06-08 | 2017-09-22 | 全椒县崇明米业有限公司 | A kind of preparation method for improving rice protein yield |
| CN108034261A (en) * | 2017-12-25 | 2018-05-15 | 全椒县新华机械有限责任公司 | A kind of good diesel engine oil seal of tube coil preparation method of thermal stability |
| CN110105742A (en) * | 2018-02-01 | 2019-08-09 | 中国石油化工股份有限公司 | Polyurethane foamed material of skin-core structure and preparation method thereof and sealing material |
| CN110105742B (en) * | 2018-02-01 | 2021-12-21 | 中国石油化工股份有限公司 | Polyurethane foam material with skin-core structure, preparation method and sealing material thereof |
| CN109021540A (en) * | 2018-06-28 | 2018-12-18 | 芜湖卓越线束系统有限公司 | The anti-aging compounded rubber and preparation method thereof that resists cold for automotive wire bundle |
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Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |