CN111004422A - NBR (nitrile-butadiene rubber) sizing material for continuous extrusion foaming - Google Patents
NBR (nitrile-butadiene rubber) sizing material for continuous extrusion foaming Download PDFInfo
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/0038—Use of organic additives containing phosphorus
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/104—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof
- C08J9/105—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof containing sulfur
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
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- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/06—Copolymers with styrene
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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Abstract
The invention discloses an NBR (nitrile-butadiene rubber) sizing material for continuous extrusion foaming, which comprises the following components in parts by weight: 40-65 parts of NBR rubber; 35-60 parts of PVC; 3-10 parts of a foaming agent; 15-20 parts of a plasticizer; 1.5-2.5 parts of sulfur; 2-4 parts of a flame retardant; 30-50 parts of a reinforcing agent; 2-4 parts of zinc oxide; 1.5-2 parts of stearic acid; 2-4 parts of an accelerator; 1-1.5 parts of microcrystalline wax; 2-3 parts of a drying agent. The invention selects more sulfur dosage, which can ensure the skinning strength; the invention is suitable for the continuous extrusion microwave vulcanization process, and the product has the advantages of uniform foaming, smooth appearance, no bubbling and small shape deformation.
Description
Technical Field
The invention belongs to the field of rubber, and particularly relates to an NBR sizing material for continuous extrusion foaming.
Background
The NBR/PVC is a mixed foaming material blended by rubber and plastic. NBR is the abbreviation for nitrile rubber, PVC is the abbreviation for polyvinyl chloride. The blend rubber prepared by blending NBR/PVC is the main rubber species used by rubber and plastic at present. The NBR/PVC blend rubber has the main advantages of ozone resistance of PVC, oil resistance and crosslinkability of NBR, certain flame retardant property, good physical and mechanical properties, rich PVC source as a main raw material and low price, so the NBR/PVC blend rubber is quite widely applied.
The microwave vulcanization is a technology for heating and vulcanizing some rubber semi-finished products under normal pressure without adding any other heat medium, which not only overcomes the internal and external temperature difference effect caused by heat conduction of the heat medium, but also can greatly shorten the vulcanization time and is beneficial to improving the vulcanization quality of rubber products.
When the microwave vulcanization process is applied, a suitable formula needs to be selected, otherwise, the smooth operation of the whole vulcanization process is difficult to ensure, and the ideal performance is difficult to achieve.
Disclosure of Invention
Aiming at the problems, the invention provides the NBR rubber material for continuous extrusion foaming, which is suitable for a continuous extrusion microwave vulcanization process, and has the advantages of uniform product foaming and smooth appearance.
In order to achieve the purpose, the technical scheme of the invention is as follows: the NBR sizing material for continuous extrusion foaming comprises the following components in parts by weight: 40-65 parts of NBR rubber; 35-60 parts of PVC; 3-10 parts of a foaming agent; 15-20 parts of a plasticizer; 1.5-2.5 parts of sulfur; 2-4 parts of a flame retardant; 30-50 parts of a reinforcing agent; 2-4 parts of zinc oxide; 1.5-2 parts of stearic acid; 2-4 parts of an accelerator; 1-1.5 parts of microcrystalline wax; 2-3 parts of a drying agent.
Preferably, the foaming agent is a mixture of foaming agent AC, foaming agent OBSH and alum.
Preferably, the plasticizer is triphenyl phosphate or diphenyl isooctyl phosphate.
Preferably, the flame retardant is a halogen-free flame retardant.
Preferably, the reinforcing agent is a mixture of carbon black and silica micropowder.
Preferably, the accelerator is a mixture of an accelerator TMTD and an accelerator D.
The invention also provides a preparation method of the NBR rubber material for continuous extrusion foaming, which sequentially comprises the following steps:
(1) preparing a rubber compound: preparing raw materials according to the proportion, sequentially putting the raw materials into an internal mixer for mixing, wherein the adding sequence is NBR, PVC → microcrystalline wax, stearic acid, a foaming agent → a reinforcing agent → a plasticizer, a flame retardant → sulfur, zinc oxide, an accelerant and a drying agent → discharging and cooling; the cooled rubber material returns to the open mill to be refined into pieces;
(2) microwave vulcanization: and on a microwave continuous vulcanization production line, extruding the rubber compound prepared in the previous step by an extruder, foaming and vulcanizing the rubber compound through a microwave section and a hot air section, cooling and cutting to finish the preparation.
The invention selects more sulfur dosage, which can ensure the skinning strength; the addition of the plasticizer firstly ensures that the dynamic performance of the rubber is not reduced, and simultaneously improves the processability of the rubber; the combination of sulfur and the accelerator ensures the dispersibility and good physical and mechanical properties of the rubber compound.
The invention has proper Mooney degree, and the Mooney degree is kept between 30 and 40. The invention is suitable for the continuous extrusion microwave vulcanization process, and the product has the advantages of uniform foaming, smooth appearance, no bubbling and small shape deformation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The NBR sizing material for continuous extrusion foaming comprises the following components in parts by weight: 40-65 parts of NBR rubber; 35-60 parts of PVC; 3-10 parts of a foaming agent; 15-20 parts of a plasticizer; 1.5-2.5 parts of sulfur; 2-4 parts of a flame retardant; 30-50 parts of a reinforcing agent; 2-4 parts of zinc oxide; 1.5-2 parts of stearic acid; 2-4 parts of an accelerator; 1-1.5 parts of microcrystalline wax; 2-3 parts of a drying agent.
Examples
The NBR rubber materials for continuous extrusion foaming in examples 1 to 5 were produced in the proportions of the components shown in Table 1.
The NBR compound for continuous extrusion foaming of the present invention was produced according to the following steps:
(1) preparing a rubber compound: preparing raw materials according to the proportion, sequentially putting the raw materials into an internal mixer for mixing, wherein the adding sequence is NBR, PVC → microcrystalline wax, stearic acid, a foaming agent → a reinforcing agent → a plasticizer, a flame retardant → sulfur, zinc oxide, an accelerant and a drying agent → discharging and cooling; the cooled rubber material returns to the open mill to be refined into pieces;
(2) microwave vulcanization: and on a microwave continuous vulcanization production line, extruding the rubber compound prepared in the previous step by an extruder, foaming and vulcanizing the rubber compound through a microwave section and a hot air section, cooling and cutting to finish the preparation.
TABLE 1 weight percentages of the ingredients of examples 1-5
In table 1, the blowing agent is a mixture of blowing agent AC, blowing agent OBSH, alum;
the plasticizer is triphenyl phosphate or diphenyl isooctyl phosphate;
the flame retardant is a halogen-free flame retardant;
the reinforcing agent is a mixture of carbon black and silicon micropowder;
the accelerator is a mixture of an accelerator TMTD and an accelerator D.
TABLE 2 Performance testing of the products prepared in examples 1-5
As can be seen from Table 2, in the embodiments 1-5 of the invention, the skinning strength can be ensured by selecting a large amount of sulfur; the rubber material is suitable for a continuous extrusion microwave vulcanization process, and the product is uniform in foaming and smooth in appearance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The NBR sizing material for continuous extrusion foaming is characterized by comprising the following components in parts by weight: 40-65 parts of NBR rubber; 35-60 parts of PVC; 3-10 parts of a foaming agent; 15-20 parts of a plasticizer; 1.5-2.5 parts of sulfur; 2-4 parts of a flame retardant; 30-50 parts of a reinforcing agent; 2-4 parts of zinc oxide; 1.5-2 parts of stearic acid; 2-4 parts of an accelerator; 1-1.5 parts of microcrystalline wax; 2-3 parts of a drying agent.
2. The NBR compound for continuous extrusion foaming according to claim 1, characterized in that the foaming agent is a mixture of foaming agents AC, OBSH, alum.
3. The NBR compound for continuous extrusion foaming according to claim 1, characterized in that the plasticizer is triphenyl phosphate or diphenyl isooctyl phosphate.
4. The NBR compound for continuous extrusion foaming of claim 1, wherein the flame retardant is a halogen free flame retardant.
5. The NBR compound for continuous extrusion foaming according to claim 1, characterized in that the accelerator is a mixture of accelerator TMTD and accelerator D.
6. The NBR compound for continuous extrusion foaming according to claim 1, characterized in that the reinforcing agent is a mixture of carbon black and silica micropowder.
7. The NBR compound for continuous extrusion foaming of any one of claims 1 to 6, wherein the preparation method of the NBR compound for continuous extrusion foaming comprises the following steps:
(1) preparing a rubber compound: preparing raw materials according to the proportion, sequentially putting the raw materials into an internal mixer for mixing, wherein the adding sequence is NBR, PVC → microcrystalline wax, stearic acid, a foaming agent → a reinforcing agent → a plasticizer, a flame retardant → sulfur, zinc oxide, an accelerant and a drying agent → discharging and cooling; the cooled rubber material returns to the open mill to be refined into pieces;
(2) microwave vulcanization: and on a microwave continuous vulcanization production line, extruding the rubber compound prepared in the previous step by an extruder, foaming and vulcanizing the rubber compound through a microwave section and a hot air section, cooling and cutting to finish the preparation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911297147.0A CN111004422A (en) | 2019-12-16 | 2019-12-16 | NBR (nitrile-butadiene rubber) sizing material for continuous extrusion foaming |
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| CN201911297147.0A CN111004422A (en) | 2019-12-16 | 2019-12-16 | NBR (nitrile-butadiene rubber) sizing material for continuous extrusion foaming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111574759A (en) * | 2020-06-09 | 2020-08-25 | 神州节能科技集团有限公司 | Green environment-friendly rubber and plastic product and preparation method thereof |
| CN116285036A (en) * | 2023-02-24 | 2023-06-23 | 上海巨原新材料科技有限公司 | Flame-retardant PVC (polyvinyl chloride) and NBR (nitrile butadiene rubber) rubber plastic floor material and processing method thereof |
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| KR20180035409A (en) * | 2016-09-29 | 2018-04-06 | (주)엘지하우시스 | Cross linked rubber foam sheet including polyvinylcloride, welded laminate and method of cross linked rubber foam sheet including polyvinylcloride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111574759A (en) * | 2020-06-09 | 2020-08-25 | 神州节能科技集团有限公司 | Green environment-friendly rubber and plastic product and preparation method thereof |
| CN116285036A (en) * | 2023-02-24 | 2023-06-23 | 上海巨原新材料科技有限公司 | Flame-retardant PVC (polyvinyl chloride) and NBR (nitrile butadiene rubber) rubber plastic floor material and processing method thereof |
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Application publication date: 20200414 |