CN108424556B - Modified powder nitrile rubber and application thereof - Google Patents
Modified powder nitrile rubber and application thereof Download PDFInfo
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- CN108424556B CN108424556B CN201810341505.2A CN201810341505A CN108424556B CN 108424556 B CN108424556 B CN 108424556B CN 201810341505 A CN201810341505 A CN 201810341505A CN 108424556 B CN108424556 B CN 108424556B
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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
- C08L27/00—Compositions 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; Compositions of derivatives of such polymers
- C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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Abstract
The invention discloses modified powder nitrile rubber and application thereof, wherein the modified powder nitrile rubber comprises the following components in parts by weight: 60-70 parts of semi-crosslinked powder nitrile rubber, 10-20 parts of fully crosslinked powder nitrile rubber and 10-30 parts of calcium terephthalate. The preparation method of the modified powder nitrile rubber comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 50-60 deg.C, adding fully crosslinked powdered nitrile rubber, mixing for 5min, adding semi-crosslinked powdered nitrile rubber, and mixing for 3-5 min. The modified powdered nitrile rubber can be used for preparing profiled bars for interior windows, is uniformly dispersed in products, can improve the toughness of the products, and simultaneously well maintains the rigidity and the heat resistance.
Description
Technical Field
The invention belongs to the field of high polymer materials, and relates to modified powdered nitrile rubber and application thereof.
Background
The hard polyvinyl chloride (PVC-U) is mainly applied to three fields of building materials, electronic appliances and packaging. It has the advantages of light weight, low manufacturing cost, convenient construction and maintenance, etc. However, the hard PVC plastic is a brittle material, and the further development and application of the hard PVC plastic are greatly limited by the defects of poor toughness, low heat resistance, poor thermal stability and the like. A series of mature routes and methods such as copolymerization, blending and the like are formed for toughening and modifying PVC-U, wherein the blending toughening modification method is most applied, and the powdered nitrile rubber is a modified material with a remarkable toughening effect.
However, although the powder nitrile rubber can improve the impact resistance, the elongation at break and the low-temperature performance of the hard PVC, the rigidity and the heat resistance of the material are reduced to different degrees along with the improvement of the impact toughness of the blend, and new defects are brought to the product. Therefore, it is urgent to develop a multifunctional toughening material which can improve the toughness of the material and also can improve the rigidity and heat resistance of the material.
Disclosure of Invention
The invention aims to solve the technical problem of providing modified powder nitrile rubber which can be uniformly dispersed in a PVC-U main body material, and the prepared PVC-U product has good toughness and good rigidity and heat resistance.
In order to achieve the purpose, the invention is realized by the following technical scheme: the modified powder nitrile rubber provided by the invention comprises the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400 and 600 microns) 60-70 parts
Fully crosslinked powdered nitrile rubber (particle size: D)90=20-30 micrometers) 10-20 parts
Calcium terephthalate (particle diameter: D)90=8-10 micron) 10-30 parts
The preparation method of the modified powder nitrile rubber comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 50-60 deg.C, adding fully crosslinked powdered nitrile rubber, mixing for 5min, adding semi-crosslinked powdered nitrile rubber, and mixing for 3-5 min.
The modified powder nitrile rubber provided by the invention can be used as a toughening agent for preparing profiled bars for interior windows. The specific formula is as follows: 100 parts of PVC (5 type), 10 parts of calcium carbonate, 5 parts of CPE, 6 parts of modified powdered nitrile rubber, 1.5 parts of processing aid, 5 parts of environment-friendly stabilizer and 0.5 part of stearic acid.
Has the advantages that: compared with the traditional powder nitrile rubber, the modified powder nitrile rubber can be uniformly dispersed in a polyvinyl chloride main material, and the modified hard polyvinyl chloride product not only has good toughness, especially has obviously improved low-temperature toughness, but also has good rigidity and heat resistance, and is not easy to discolor when being illuminated.
Drawings
FIG. 1 is an atomic force microscope image of a cross section of a sample wafer prepared in example 1 after being subjected to a low-temperature brittle section.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that these examples are illustrative and exemplary of the present invention, and are not intended to limit the scope of the present invention in any way.
Example 1
The modified powder nitrile rubber provided by the invention comprises the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400 and 600 μm) 60 parts
Fully crosslinked powdered nitrile rubber (particle size: D)90=20-30 μm) 10 parts
Calcium terephthalate (particle diameter: D)90=8-10 micron) 30 parts
The preparation method of the modified powder nitrile rubber comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 50 deg.C, adding fully crosslinked powdered nitrile-butadiene rubber, mixing for 5min, adding semi-crosslinked powdered nitrile-butadiene rubber, and mixing for 5 min.
Example 2
The modified powder nitrile rubber provided by the invention comprises the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400 and 600 μm) 70 parts
Fully crosslinked powdered nitrile rubber (particle size: D)90=20-30 micrometers) 20 parts
Calcium terephthalate (particle diameter: D)90=8-10 microns) 10 parts
The preparation method of the modified powder nitrile rubber comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 60 deg.C, adding fully crosslinked powdered nitrile rubber, mixing for 5min, adding semi-crosslinked powdered nitrile rubber, and mixing for 3 min.
Example 3
The modified powder nitrile rubber provided by the invention comprises the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400-600 μm)65 portions of
Fully crosslinked powdered nitrile rubber (particle size: D)90=20-30 micrometers) 15 parts
Calcium terephthalate (particle diameter: D)90=8-10 microns) 20 parts
The preparation method of the modified powder nitrile rubber comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 55 deg.C, adding fully crosslinked powdered nitrile rubber, mixing for 5min, adding semi-crosslinked powdered nitrile rubber, and mixing for 4 min.
Comparative example 1
Comparative example 1 differs from example 1 in that:
the preparation method of the modified powder nitrile rubber in the comparative example 1 comprises the following process steps: and simultaneously adding calcium terephthalate, semi-crosslinked powdered nitrile rubber and fully crosslinked powdered nitrile rubber into a high-speed mixer with a heating function, mixing and heating to 50 ℃, and continuously mixing for 10min to obtain the composite material.
Comparative example 2
Comparative example 2 differs from example 1 in that:
the modified powdered nitrile rubber described in comparative example 2 consists of the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400 and 600 μm) 70 parts
Calcium terephthalate (particle diameter: D)90=8-10 micron) 30 parts
The preparation method of the modified powder nitrile rubber described in the comparative example 2 comprises the following process steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 50 deg.C, adding semi-crosslinked nitrile rubber powder, and mixing for 5 min.
Comparative example 3
Comparative example 3 differs from example 1 in that:
the modified powdered nitrile rubber described in comparative example 3 consists of the following components in parts by weight:
semi-crosslinked powdered nitrile rubber (particle diameter: D)90=400 and 600 μm) 90 parts
Fully crosslinked powdered nitrile rubber (particle size: D)90=20-30 μm) 10 parts
The preparation method of the modified powdered nitrile rubber described in the comparative example 3 comprises the following process steps: mixing the fully crosslinked powdered nitrile rubber in a high-speed mixer with heating function, heating to 50 deg.C, adding the semi-crosslinked powdered nitrile rubber, and mixing for 5 min.
And (3) performance testing:
various types of powdered nitrile rubber are applied to the interior trim window profiled bar formula, and the formula is as follows: 100 parts of PVC (5 type), 10 parts of calcium carbonate, 5 parts of CPE, 6 parts of modified powder nitrile rubber (variants: example 1, comparative example 2, comparative example 3 and unmodified pure semi-crosslinked powder nitrile rubber respectively), 1.5 parts of processing aid, 5 parts of environment-friendly stabilizer and 0.5 part of stearic acid.
Weighing and mixing PVC resin, processing aids and other auxiliary material aids according to the formula proportion requirement, adding into a high-speed mixer, and increasing the stirring speed of the mixer from low speed to high speed; when the temperature of the mixed material is gradually increased to 100 ℃, adding calcium carbonate; when the temperature of the mixed materials rises to 100 ℃ again, continuously stirring for 30 s, and then discharging and cooling; cooling to 40-50 deg.C, adding powdered nitrile butadiene rubber, mixing, and storing.
Plasticating the prepared PVC mixed powder into sheets by using an open plasticator; pressing into test sample with certain specification by using a cold and hot press, and testing mechanical and other properties after preparing into a standard sample. The test was carried out according to the national standard and the properties obtained are shown in Table 1.
TABLE 1
From a comparison of the data in the table it can be seen that: the modified powdered nitrile rubber obtained by the invention can improve the toughness of the rigid polyvinyl chloride product at normal temperature and low temperature, and simultaneously, the rigidity and heat resistance of the product are well maintained.
FIG. 1 is an atomic force microscope photograph of a cross section of a sample sheet prepared in example 1 after a low-temperature brittle section, and it can be seen that the modified powdered nitrile rubber can be dispersed relatively uniformly.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification, and equivalents thereof.
Claims (2)
1. A modified powder nitrile rubber is characterized in that: the modified powder nitrile rubber comprises the following components in parts by weight:
60-70 parts of semi-crosslinked powder nitrile rubber,
10-20 parts of full-crosslinked powder nitrile rubber,
10-30 parts of calcium terephthalate;
the particle size of the semi-crosslinked powder nitrile rubber is D90400-micron and full-crosslinked powder nitrile rubber with the particle diameter of D9020-30 microns, the particle size of the calcium terephthalate is D908-10 microns;
the preparation method of the modified powder nitrile rubber comprises the following steps: mixing calcium terephthalate in a high-speed mixer with heating function, heating to 50-60 deg.C, adding fully crosslinked powdered nitrile rubber, mixing for 5min, adding semi-crosslinked powdered nitrile rubber, and mixing for 3-5 min.
2. Use of the modified powdered nitrile rubber according to claim 1, wherein: the modified powder nitrile rubber can be used as a toughening agent for preparing profiled bars for interior windows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810341505.2A CN108424556B (en) | 2018-04-17 | 2018-04-17 | Modified powder nitrile rubber and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810341505.2A CN108424556B (en) | 2018-04-17 | 2018-04-17 | Modified powder nitrile rubber and application thereof |
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| Publication Number | Publication Date |
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| CN108424556A CN108424556A (en) | 2018-08-21 |
| CN108424556B true CN108424556B (en) | 2021-03-09 |
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| CN201810341505.2A Active CN108424556B (en) | 2018-04-17 | 2018-04-17 | Modified powder nitrile rubber and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110903575B (en) * | 2019-12-20 | 2021-07-09 | 常州市五洲环保科技有限公司 | Preparation method of high-rigidity toughening material for PVC |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980574A (en) * | 2014-06-05 | 2014-08-13 | 常州市五洲化工有限公司 | Modified nitrile-butadiene rubber (NBR) and preparation method thereof |
| CN104774400A (en) * | 2015-03-04 | 2015-07-15 | 宁波泰甬汽车零部件有限公司 | PVC pellet composition with low compression set, and preparation method and application thereof |
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2018
- 2018-04-17 CN CN201810341505.2A patent/CN108424556B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980574A (en) * | 2014-06-05 | 2014-08-13 | 常州市五洲化工有限公司 | Modified nitrile-butadiene rubber (NBR) and preparation method thereof |
| CN104774400A (en) * | 2015-03-04 | 2015-07-15 | 宁波泰甬汽车零部件有限公司 | PVC pellet composition with low compression set, and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| "鞋底料用粉末丁腈橡胶改性PVC";康永锋;《合成橡胶工业》;20000915;第23卷(第5期);第275-278页 * |
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