CN112409704A - Low-volatilization EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber - Google Patents
Low-volatilization EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber Download PDFInfo
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- CN112409704A CN112409704A CN202011282565.5A CN202011282565A CN112409704A CN 112409704 A CN112409704 A CN 112409704A CN 202011282565 A CN202011282565 A CN 202011282565A CN 112409704 A CN112409704 A CN 112409704A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
Abstract
The invention discloses low-volatility EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber, and particularly relates to the technical field of rubber, wherein the technical scheme is as follows: the environment-friendly flame-retardant rubber comprises a main raw material and auxiliary raw materials, wherein the main raw material comprises ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, the auxiliary raw material comprises a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an antifrost agent, and the main raw material comprises the following components in parts by weight: 70-120 parts of ethylene propylene diene monomer, 30-60 parts of carbon black, 3-5 parts of paraffin oil and 2-6 parts of zinc oxide, wherein the auxiliary raw materials comprise the following components in parts by weight: 10-30 parts of plasticizer, 1-3 parts of stearic acid, 0.1-0.4 part of accelerator, 4-9 parts of vulcanizing agent, 3-7 parts of cross-linking agent and 2-4 parts of antifrost agent, and the low-volatility EPDM car light sealing piece rubber has the beneficial effects that: the EPDM rubber for the car light sealing element has the effects of high temperature resistance and low volatility by selecting the EPDM rubber with high polymerization activity, narrow molecular weight distribution and less volatile matters.
Description
Technical Field
The invention relates to the technical field of rubber, in particular to low-volatility EPDM car lamp sealing element rubber.
Background
The vehicle lamp is a lamp on a vehicle, is a tool for illuminating the road when the vehicle runs at night, and is also a prompting tool for sending various vehicle running signals, the vehicle lamp has the rubber sealing element in the composition, the sealing element has the sealing performance at high temperature, the rubber sealing element is a general basic element in the sealing device, has higher elasticity and slight plasticity at normal temperature, has very good mechanical strength and small hysteresis loss, and the rubber sealing element has low heat generation when being deformed for many times, so the bending resistance and the flexibility of the rubber sealing element are also good, and the electrical insulation performance is good because the rubber sealing element is nonpolar rubber.
The prior art has the following defects: the existing EPDM car lamp sealing element rubber is influenced by radiation heat of a bulb, organic gas is generated, an atomization phenomenon is caused, the high-temperature resistance of the sealing element is reduced, and the volatilization performance is higher.
Therefore, the invention of the EPDM car lamp sealing rubber with low volatilization is necessary.
Disclosure of Invention
Therefore, the invention provides the low-volatility EPDM car lamp sealing element rubber, which solves the problems that the EPDM car lamp sealing element rubber is influenced by radiation heat of a bulb, generates organic gas, causes an atomization phenomenon, reduces the high-temperature resistance of the sealing element and has higher volatility by selecting the EPDM rubber with high polymerization activity, narrow molecular weight distribution and less volatility.
In order to achieve the above purpose, the invention provides the following technical scheme: the low-volatility EPDM car lamp sealing element rubber comprises a main raw material and an auxiliary raw material, wherein the main raw material comprises ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, and the auxiliary raw material comprises a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an antifrost agent;
the main raw materials comprise the following components in parts by weight: 70-120 parts of ethylene propylene diene monomer, 30-60 parts of carbon black, 3-5 parts of paraffin oil and 2-6 parts of zinc oxide;
the auxiliary raw materials comprise the following components in parts by weight: 10-30 parts of plasticizer, 1-3 parts of stearic acid, 0.1-0.4 part of accelerator, 4-9 parts of vulcanizing agent, 3-7 parts of cross-linking agent and 2-4 parts of antifrost agent.
Preferably, the processing method also comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor to plasticate, roll and vulcanize for 90 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
Preferably, the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
70 parts of ethylene propylene diene monomer, 30 parts of carbon black, 3 parts of paraffin oil and 2 parts of zinc oxide;
10 parts of plasticizer, 1 part of stearic acid, 0.1 part of accelerator, 4 parts of vulcanizing agent, 3 parts of crosslinking agent and 2 parts of antifrost agent.
Preferably, the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
95 parts of ethylene propylene diene monomer, 45 parts of carbon black, 4 parts of paraffin oil and 4 parts of zinc oxide;
20 parts of plasticizer, 2 parts of stearic acid, 0.25 part of accelerator, 6.5 parts of vulcanizing agent, 5 parts of cross-linking agent and 3 parts of antifrost agent.
Preferably, the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
120 parts of ethylene propylene diene monomer, 60 parts of carbon black, 5 parts of paraffin oil and 6 parts of zinc oxide;
30 parts of plasticizer, 3 parts of stearic acid, 0.4 part of accelerator, 9 parts of vulcanizing agent, 7 parts of crosslinking agent and 4 parts of antifrost agent.
Preferably, the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
120 parts of ethylene propylene diene monomer, 30 parts of carbon black, 5 parts of paraffin oil and 2 parts of zinc oxide;
30 parts of plasticizer, 1 part of stearic acid, 0.4 part of accelerator, 4 parts of vulcanizing agent, 7 parts of crosslinking agent and 2 parts of antifrost agent.
Preferably, in the step S2, the reactor is heated to 150 ℃.
Preferably, in step S3, the rubber vulcanization time is 5 minutes.
The invention has the beneficial effects that:
the low-volatility EPDM car lamp sealing element rubber disclosed by the invention has the advantages of better high temperature resistance, lower volatility, stronger corrosion resistance and long service life, and meets the requirement of low volatility of car lamp sealing elements.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1:
the invention provides low-volatility EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber which comprises a main raw material and an auxiliary raw material;
furthermore, the main raw materials comprise ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, the auxiliary raw materials comprise plasticizer, stearic acid, accelerator, vulcanizing agent, cross-linking agent and antifrost agent, the ethylene propylene diene monomer has excellent water resistance and chemical resistance, excellent weather resistance and ozone resistance, the ethylene propylene diene monomer with high polymerization activity, narrow molecular weight distribution and less volatile is selected, the ethylene propylene diene monomer has the function of reducing the volatilization of the EPDM car lamp sealing element rubber, is used as a sealing element and has high-temperature steam resistance, has excellent impermeability to gas, the carbon black has the reinforcing function, improves various physical properties and chemical properties of the original rubber, protects the rubber from aging, the paraffin oil regulates the hardness of the product, is used as lubricant and activator, ensures that various materials are fully mixed and reacted in the cross-linking process, and the zinc oxide is used as an inorganic activator of the rubber and has the accelerating performance, the vulcanizing agent can enable rubber molecular chains to be crosslinked into a compounding agent of vulcanized rubber, the crosslinking agent has the effects of improving the heat resistance, the flame retardance, the mechanical strength and other properties of a product, and the frost-proof agent has an obvious inhibiting function on the quality fluctuation of a rubber material, the fluctuation of a technological process and surface frost separation caused by uneven stress factors;
the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
70 parts of ethylene propylene diene monomer, 30 parts of carbon black, 3 parts of paraffin oil and 2 parts of zinc oxide;
10 parts of plasticizer, 1 part of stearic acid, 0.1 part of accelerator, 4 parts of vulcanizing agent, 3 parts of crosslinking agent and 2 parts of antifrost agent;
further, the processing method comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes, and heating the reactor to 150 ℃;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor continuously for plastication, calendering and vulcanization for 90 minutes, wherein the rubber vulcanization time is 5 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
Example 2:
the invention provides low-volatility EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber which comprises a main raw material and an auxiliary raw material;
furthermore, the main raw materials comprise ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, the auxiliary raw materials comprise plasticizer, stearic acid, accelerator, vulcanizing agent, cross-linking agent and antifrost agent, the ethylene propylene diene monomer has excellent water resistance and chemical resistance, excellent weather resistance and ozone resistance, the ethylene propylene diene monomer with high polymerization activity, narrow molecular weight distribution and less volatile is selected, the ethylene propylene diene monomer has the function of reducing the volatilization of the EPDM car lamp sealing element rubber, is used as a sealing element and has high-temperature steam resistance, has excellent impermeability to gas, the carbon black has the reinforcing function, improves various physical properties and chemical properties of the original rubber, protects the rubber from aging, the paraffin oil regulates the hardness of the product, is used as lubricant and activator, ensures that various materials are fully mixed and reacted in the cross-linking process, and the zinc oxide is used as an inorganic activator of the rubber and has the accelerating performance, the vulcanizing agent can enable rubber molecular chains to be crosslinked into a compounding agent of vulcanized rubber, the crosslinking agent has the effects of improving the heat resistance, the flame retardance, the mechanical strength and other properties of a product, and the frost-proof agent has an obvious inhibiting function on the quality fluctuation of a rubber material, the fluctuation of a technological process and surface frost separation caused by uneven stress factors;
the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
95 parts of ethylene propylene diene monomer, 45 parts of carbon black, 4 parts of paraffin oil and 4 parts of zinc oxide;
20 parts of plasticizer, 2 parts of stearic acid, 0.25 part of accelerator, 6.5 parts of vulcanizing agent, 5 parts of cross-linking agent and 3 parts of antifrost agent;
further, the processing method comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes, and heating the reactor to 150 ℃;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor continuously for plastication, calendering and vulcanization for 90 minutes, wherein the rubber vulcanization time is 5 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
Example 3:
the invention provides low-volatility EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber which comprises a main raw material and an auxiliary raw material;
furthermore, the main raw materials comprise ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, the auxiliary raw materials comprise plasticizer, stearic acid, accelerator, vulcanizing agent, cross-linking agent and antifrost agent, the ethylene propylene diene monomer has excellent water resistance and chemical resistance, excellent weather resistance and ozone resistance, the ethylene propylene diene monomer with high polymerization activity, narrow molecular weight distribution and less volatile is selected, the ethylene propylene diene monomer has the function of reducing the volatilization of the EPDM car lamp sealing element rubber, is used as a sealing element and has high-temperature steam resistance, has excellent impermeability to gas, the carbon black has the reinforcing function, improves various physical properties and chemical properties of the original rubber, protects the rubber from aging, the paraffin oil regulates the hardness of the product, is used as lubricant and activator, ensures that various materials are fully mixed and reacted in the cross-linking process, and the zinc oxide is used as an inorganic activator of the rubber and has the accelerating performance, the vulcanizing agent can enable rubber molecular chains to be crosslinked into a compounding agent of vulcanized rubber, the crosslinking agent has the effects of improving the heat resistance, the flame retardance, the mechanical strength and other properties of a product, and the frost-proof agent has an obvious inhibiting function on the quality fluctuation of a rubber material, the fluctuation of a technological process and surface frost separation caused by uneven stress factors;
the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
120 parts of ethylene propylene diene monomer, 60 parts of carbon black, 5 parts of paraffin oil and 6 parts of zinc oxide;
30 parts of plasticizer, 3 parts of stearic acid, 0.4 part of accelerator, 9 parts of vulcanizing agent, 7 parts of crosslinking agent and 4 parts of antifrost agent;
further, the processing method comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes, and heating the reactor to 150 ℃;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor continuously for plastication, calendering and vulcanization for 90 minutes, wherein the rubber vulcanization time is 5 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
Example 4:
the invention provides low-volatility EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber which comprises a main raw material and an auxiliary raw material;
furthermore, the main raw materials comprise ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, the auxiliary raw materials comprise plasticizer, stearic acid, accelerator, vulcanizing agent, cross-linking agent and antifrost agent, the ethylene propylene diene monomer has excellent water resistance and chemical resistance, excellent weather resistance and ozone resistance, the ethylene propylene diene monomer with high polymerization activity, narrow molecular weight distribution and less volatile is selected, the ethylene propylene diene monomer has the function of reducing the volatilization of the EPDM car lamp sealing element rubber, is used as a sealing element and has high-temperature steam resistance, has excellent impermeability to gas, the carbon black has the reinforcing function, improves various physical properties and chemical properties of the original rubber, protects the rubber from aging, the paraffin oil regulates the hardness of the product, is used as lubricant and activator, ensures that various materials are fully mixed and reacted in the cross-linking process, and the zinc oxide is used as an inorganic activator of the rubber and has the accelerating performance, the vulcanizing agent can enable rubber molecular chains to be crosslinked into a compounding agent of vulcanized rubber, the crosslinking agent has the effects of improving the heat resistance, the flame retardance, the mechanical strength and other properties of a product, and the frost-proof agent has an obvious inhibiting function on the quality fluctuation of a rubber material, the fluctuation of a technological process and surface frost separation caused by uneven stress factors;
the main raw material and the auxiliary raw material are prepared from the following raw materials in parts by weight:
120 parts of ethylene propylene diene monomer, 30 parts of carbon black, 5 parts of paraffin oil and 2 parts of zinc oxide;
30 parts of plasticizer, 1 part of stearic acid, 0.4 part of accelerator, 4 parts of vulcanizing agent, 7 parts of crosslinking agent and 2 parts of antifrost agent;
further, the processing method comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes, and heating the reactor to 150 ℃;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor continuously for plastication, calendering and vulcanization for 90 minutes, wherein the rubber vulcanization time is 5 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
The low volatility EPDM vehicle light seal rubbers from examples 1-4 above were selected for testing and the following data were obtained:
| high temperature resistance | Volatility | Corrosion resistance | |
| Example 1 | Weak (weak) | Height of | Weak (weak) |
| Example 2 | Is stronger | Is lower than | Is stronger |
| Example 3 | High strength | Is low in | High strength |
| Example 4 | High strength | Height of | Weak (weak) |
As can be seen from the above table, the low-volatility EPDM car light sealing rubber in the embodiments 1-4 has the advantages of strong high temperature resistance, low volatility, strong corrosion resistance and the best combination property when the EPDM car light sealing rubber in the embodiment 2 comprises 95 parts of ethylene propylene diene monomer, 45 parts of carbon black, 4 parts of paraffin oil, 4 parts of zinc oxide, 20 parts of plasticizer, 2 parts of stearic acid, 0.25 part of accelerator, 6.5 parts of vulcanizing agent, 5 parts of cross-linking agent and 3 parts of antifrost agent.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a low EPDM car light sealing member rubber that volatilizees, includes main raw materials and supplementary raw materials, its characterized in that: the main raw materials comprise ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide, and the auxiliary raw materials comprise a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an antifrost agent;
the main raw materials comprise (by weight portion): 70-120 parts of ethylene propylene diene monomer, 30-60 parts of carbon black, 3-5 parts of paraffin oil and 2-6 parts of zinc oxide;
the auxiliary raw materials comprise (by weight portion): 10-30 parts of plasticizer, 1-3 parts of stearic acid, 0.1-0.4 part of accelerator, 4-9 parts of vulcanizing agent, 3-7 parts of cross-linking agent and 2-4 parts of antifrost agent.
2. A low volatility EPDM lamp seal rubber as set forth in claim 1, wherein: the processing method comprises the following specific steps:
s1: preparing a reactor;
s2: respectively adding ethylene propylene diene monomer, carbon black, paraffin oil and zinc oxide into a reactor for mixing for 60 minutes;
s3: respectively adding a plasticizer, stearic acid, an accelerator, a vulcanizing agent, a cross-linking agent and an anti-frost agent into the reactor to plasticate, roll and vulcanize for 90 minutes;
s4: extruding and molding the vulcanized rubber;
s5: cutting the formed rubber, and standing the rubber at 120 ℃ for 3-5h to obtain the rubber.
3. A low volatility EPDM lamp seal rubber as set forth in claim 1, wherein: the main raw material and the auxiliary raw material (in parts by weight) are prepared from the following raw materials:
70 parts of ethylene propylene diene monomer, 30 parts of carbon black, 3 parts of paraffin oil and 2 parts of zinc oxide; 10 parts of plasticizer, 1 part of stearic acid, 0.1 part of accelerator, 4 parts of vulcanizing agent, 3 parts of crosslinking agent and 2 parts of antifrost agent.
4. A low volatility EPDM lamp seal rubber as set forth in claim 1, wherein: the main raw material and the auxiliary raw material (in parts by weight) are prepared from the following raw materials:
95 parts of ethylene propylene diene monomer, 45 parts of carbon black, 4 parts of paraffin oil and 4 parts of zinc oxide;
20 parts of plasticizer, 2 parts of stearic acid, 0.25 part of accelerator, 6.5 parts of vulcanizing agent, 5 parts of cross-linking agent and 3 parts of antifrost agent.
5. A low volatility EPDM lamp seal rubber as set forth in claim 1, wherein: the main raw material and the auxiliary raw material (in parts by weight) are prepared from the following raw materials:
120 parts of ethylene propylene diene monomer, 60 parts of carbon black, 5 parts of paraffin oil and 6 parts of zinc oxide;
30 parts of plasticizer, 3 parts of stearic acid, 0.4 part of accelerator, 9 parts of vulcanizing agent, 7 parts of crosslinking agent and 4 parts of anti-frost agent.
6. A low volatility EPDM lamp seal rubber as set forth in claim 1, wherein: the main raw material and the auxiliary raw material (in parts by weight) are prepared from the following raw materials:
120 parts of ethylene propylene diene monomer, 30 parts of carbon black, 5 parts of paraffin oil and 2 parts of zinc oxide;
30 parts of plasticizer, 1 part of stearic acid, 0.4 part of accelerator, 4 parts of vulcanizing agent, 7 parts of crosslinking agent and 2 parts of antifrost agent.
7. A low volatility EPDM lamp seal rubber as claimed in claim 2, wherein: in said step S2, the reactor is heated to 150 ℃.
8. A low volatility EPDM lamp seal rubber as claimed in claim 2, wherein: in step S3, the rubber vulcanization time is 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282565.5A CN112409704A (en) | 2020-11-17 | 2020-11-17 | Low-volatilization EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011282565.5A CN112409704A (en) | 2020-11-17 | 2020-11-17 | Low-volatilization EPDM (ethylene-propylene-diene monomer) car lamp sealing element rubber |
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| CN112409704A true CN112409704A (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249949A (en) * | 2022-01-14 | 2022-03-29 | 四川佳世特橡胶有限公司 | Low-VOC flexible sealing material formula for pipe gallery |
-
2020
- 2020-11-17 CN CN202011282565.5A patent/CN112409704A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249949A (en) * | 2022-01-14 | 2022-03-29 | 四川佳世特橡胶有限公司 | Low-VOC flexible sealing material formula for pipe gallery |
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