CN113881224A - Anti-yellowing nylon material and preparation method thereof - Google Patents
Anti-yellowing nylon material and preparation method thereof Download PDFInfo
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- CN113881224A CN113881224A CN202111267456.0A CN202111267456A CN113881224A CN 113881224 A CN113881224 A CN 113881224A CN 202111267456 A CN202111267456 A CN 202111267456A CN 113881224 A CN113881224 A CN 113881224A
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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 a yellowing-resistant nylon material and a preparation method thereof. The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 120 parts of high-temperature nylon 100-20 parts, 10-20 parts of elastomer, 10-20 parts of carbon fiber, 2-5 parts of titanium dioxide, 1-3 parts of antioxidant and 1-3 parts of light stabilizer, wherein the antioxidant is phosphite antioxidant. The yellowing-resistant nylon material disclosed by the invention takes high-temperature nylon as a main raw material, adopts the synergistic effect of titanium dioxide and phosphite antioxidant, improves the yellowing of the nylon material, and simultaneously adopts a mode of extruding for many times in the processing process, improves the stability of the nylon material and reduces the yellowing of the nylon material.
Description
Technical Field
The invention relates to a yellowing-resistant nylon material and a preparation method thereof, belonging to the technical field of plastics.
Background
Nylon 66 has high fatigue strength and rigidity, good heat resistance, low friction coefficient and good wear resistance, and is widely used in the fields of electronics, household appliances, automobiles and the like, however, most PA materials can be applied only by modification, the dosage of filling modification and reinforcing modification is the largest, and EPDM and POE toughening modified nylon materials also have more applications. The trend of improvement in recent years is to increase the flowability, heat resistance, halogen-free flame retardancy and other properties of nylon materials. However, some aging aids such as antioxidants are added into the nylon materials, and the antioxidants contain phenol groups and react with amido bonds in the nylon to generate colored substances, namely yellowing. How to solve the yellowing problem is a challenge.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a yellowing-resistant nylon material and a preparation method thereof, which improve the yellowing phenomenon of nylon.
The invention is realized by the following technical scheme:
the yellowing-resistant nylon material comprises the following raw materials in parts by weight: 120 parts of high-temperature nylon 100-20 parts, 10-20 parts of elastomer, 10-20 parts of carbon fiber, 2-5 parts of titanium dioxide, 1-3 parts of antioxidant and 1-3 parts of light stabilizer, wherein the antioxidant is phosphite antioxidant.
The high-temperature nylon is a mixture of nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent.
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: nylon 66100-120 parts, titanium dioxide 5-8 parts, silicon dioxide 5-8 parts and silane coupling agent 1-3 parts.
The high-temperature nylon material is prepared by the following steps: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain the high-temperature nylon.
The anti-yellowing nylon material is characterized in that the elastomer is a polyamide thermoplastic elastomer, K resin or butyl rubber.
The light stabilizer is carbon black or hindered amine light stabilizer.
The preparation method of the yellowing-resistant nylon material comprises the following steps: physically blending high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer, extruding and granulating by a double-screw extruder to obtain a primary extruded material, drying the primary extruded material, repeating the extrusion process, and extruding for multiple times to obtain the yellowing-resistant nylon material.
In the preparation method of the yellowing-resistant nylon material, the temperatures of the extruder 1-9 zones are 220 ℃, 275 ℃, 265 ℃, 260 ℃, 265 ℃ and 270 ℃ of the head temperature.
The invention achieves the following beneficial effects:
the yellowing-resistant nylon material disclosed by the invention takes high-temperature nylon as a main raw material, adopts the synergistic effect of titanium dioxide and phosphite antioxidant, improves the yellowing of the nylon material, and simultaneously adopts a mode of extruding for many times in the processing process, improves the stability of the nylon material and reduces the yellowing of the nylon material.
The high-temperature nylon adopts nylon, titanium dioxide, silicon dioxide and a silane coupling agent, so that the high-temperature performance of the nylon is improved, and the stability of the nylon under the high-temperature condition is improved.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 100 parts of high-temperature nylon, 10 parts of K resin, 10 parts of carbon fiber, 2 parts of titanium dioxide, 1 part of antioxidant and 1 part of carbon black, wherein the antioxidant is phosphite antioxidant.
The high-temperature nylon is a mixture of nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent. The high-temperature nylon comprises the following raw materials in parts by weight: nylon 66100 parts, titanium dioxide 8 parts, silicon dioxide 5 parts and silane coupling agent 1 part.
The preparation method of the yellowing-resistant nylon material comprises the following steps:
(1) preparing high-temperature nylon: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain high-temperature nylon;
(2) mixing: uniformly mixing high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer to obtain a mixed material;
(3) extruding: and extruding and granulating the mixed material through a double-screw extruder to obtain a primary extruded material, drying the primary extruded material, repeating the extrusion process, and extruding for four times to obtain the yellowing-resistant nylon material. The temperatures of the extruder zones 1-9 were 220 deg.C, 275 deg.C, 265 deg.C, 260 deg.C, 265 deg.C and 270 deg.C, respectively, at the extruder head.
Example 2
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 120 parts of high-temperature nylon, 20 parts of polyamide thermoplastic elastomer, 20 parts of carbon fiber, 5 parts of titanium dioxide, 3 parts of antioxidant and 3 parts of hindered amine light stabilizer, wherein the antioxidant is phosphite antioxidant.
The high-temperature nylon is a mixture of nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent. The high-temperature nylon comprises the following raw materials in parts by weight: nylon 66120 parts, titanium dioxide 5 parts, silicon dioxide 8 parts and silane coupling agent 3 parts.
The preparation method of the yellowing-resistant nylon material comprises the following steps:
(1) preparing high-temperature nylon: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain high-temperature nylon;
(2) mixing: uniformly mixing high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer to obtain a mixed material;
(3) extruding: and extruding and granulating the mixed material through a double-screw extruder to obtain a primary extruded material, drying the primary extruded material, repeating the extrusion process, and extruding for three times to obtain the yellowing-resistant nylon material. The temperatures of the extruder zones 1-9 were 220 deg.C, 275 deg.C, 265 deg.C, 260 deg.C, 265 deg.C and 270 deg.C, respectively, at the extruder head.
Example 3
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 110 parts of high-temperature nylon, 15 parts of butyl rubber, 12 parts of carbon fiber, 3 parts of titanium dioxide, 2 parts of antioxidant and 2 parts of carbon black, wherein the antioxidant is phosphite antioxidant.
The high-temperature nylon is a mixture of nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent. The high-temperature nylon comprises the following raw materials in parts by weight: nylon 66110 parts, titanium dioxide 6 parts, silicon dioxide 6 parts and silane coupling agent 2 parts.
The preparation method of the yellowing-resistant nylon material comprises the following steps:
(1) preparing high-temperature nylon: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain high-temperature nylon;
(2) mixing: uniformly mixing high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer to obtain a mixed material;
(3) extruding: and extruding and granulating the mixed material through a double-screw extruder to obtain a primary extruded material, drying the primary extruded material, repeating the extrusion process, and extruding for four times to obtain the yellowing-resistant nylon material. The temperatures of the extruder zones 1-9 were 220 deg.C, 275 deg.C, 265 deg.C, 260 deg.C, 265 deg.C and 270 deg.C, respectively, at the extruder head.
Comparative example 1
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 110 parts of high-temperature nylon, 15 parts of butyl rubber, 12 parts of carbon fiber, 3 parts of titanium dioxide, 1682 parts of antioxidant and 2 parts of carbon black. The rest is the same as in example 3.
Comparative example 2
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 110 parts of high-temperature nylon, 15 parts of butyl rubber, 12 parts of carbon fiber, 2 parts of antioxidant and 2 parts of carbon black, wherein the antioxidant is phosphite antioxidant. The rest is the same as in example 3.
Comparative example 3
The yellowing-resistant nylon material comprises the following raw materials in parts by weight: 110 parts of high-temperature nylon, 15 parts of butyl rubber, 12 parts of carbon fiber, 3 parts of titanium dioxide, 2 parts of antioxidant and 2 parts of carbon black, wherein the antioxidant is phosphite antioxidant.
The preparation method of the yellowing-resistant nylon material comprises the following steps:
(1) preparing high-temperature nylon: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain high-temperature nylon;
(2) mixing: uniformly mixing high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer to obtain a mixed material;
(3) extruding: and extruding and granulating the mixed material through a double-screw extruder to obtain the yellowing-resistant nylon material. The temperatures of the extruder zones 1-9 were 220 deg.C, 275 deg.C, 265 deg.C, 260 deg.C, 265 deg.C and 270 deg.C, respectively, at the extruder head. The rest is the same as in example 3.
The plastic particles in the examples and comparative examples were subjected to performance tests, and the specific results are shown in table 1.
TABLE 1 Plastic particle Performance test results
Where YI means the degree to which a colorless transparent or translucent or near-white plastic containing no fluorescent substance deviates from white. YI is a very aging sensitive parameter, and changes in YI can be detected even sometimes when structural changes are not yet reflected in its ir spectrum [4 ]. According to ASTM D1925-1970 (1977), YI is calculated as: YI =100 (1.28X-1.06Z)/Y. In the formula: x, Y, Z are three stimulus values of the color of the material measured under a standard light source. YI is positive and greater indicates a material that is more yellow in color, and negative indicates a material that is more blue in color.
Through table 1, compared with comparative example 1, examples 1, 2 and 3 adopt phosphite antioxidant to improve the yellowing of nylon, compared with comparative example 2, examples 1, 2 and 3 adopt titanium dioxide to cooperate with phosphite antioxidant to improve the yellowing of nylon; compared with the comparative example 3, the processing mode of multiple times of extrusion is adopted in the examples 1, 2 and 3, and the stability of the nylon material is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The yellowing-resistant nylon material is characterized by comprising the following raw materials in parts by weight: 120 parts of high-temperature nylon 100-20 parts, 10-20 parts of elastomer, 10-20 parts of carbon fiber, 2-5 parts of titanium dioxide, 1-3 parts of antioxidant and 1-3 parts of light stabilizer, wherein the antioxidant is phosphite antioxidant.
2. The yellowing-resistant nylon material as claimed in claim 1, wherein the high-temperature nylon is a mixture of nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent.
3. The yellowing-resistant nylon material as claimed in claim 2, wherein the high-temperature nylon comprises the following raw materials in parts by weight: nylon 66100-120 parts, titanium dioxide 5-8 parts, silicon dioxide 5-8 parts and silane coupling agent 1-3 parts.
4. The yellowing-resistant nylon material as claimed in claim 2 or 3, wherein the high-temperature nylon is obtained by the following steps: mixing nylon 66, titanium dioxide, silicon dioxide and a silane coupling agent, adding the mixture into a double-screw extruder, and carrying out melting, extrusion, grain cutting and drying to obtain the high-temperature nylon.
5. The yellowing-resistant nylon material as claimed in claim 1, wherein the elastomer is a polyamide-based thermoplastic elastomer, a K resin or a butyl rubber.
6. The yellowing-resistant nylon material of claim 4, wherein the light stabilizer is carbon black or a hindered amine light stabilizer.
7. The method for preparing the yellowing-resistant nylon material according to any one of claims 1 to 6, comprising the following steps: physically blending high-temperature nylon, elastomer, carbon fiber, titanium dioxide, antioxidant and light stabilizer, extruding and granulating by a double-screw extruder to obtain a primary extruded material, drying the primary extruded material, repeating the extrusion process, and extruding for multiple times to obtain the yellowing-resistant nylon material.
8. The method for preparing yellowing-resistant nylon material as claimed in claim 7, wherein the temperatures of the extruder zones 1-9 are 220 ℃, 275 ℃, 265 ℃, 260 ℃, 265 ℃ and 270 ℃ respectively.
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| CN202111267456.0A CN113881224A (en) | 2021-10-29 | 2021-10-29 | Anti-yellowing nylon material and preparation method thereof |
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| CN202111267456.0A CN113881224A (en) | 2021-10-29 | 2021-10-29 | Anti-yellowing nylon material and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105295369A (en) * | 2015-11-17 | 2016-02-03 | 芜湖信宁新材料科技有限公司 | High temperature resistant nylon material composition and preparation method of high temperature resistant nylon |
| CN107141785A (en) * | 2017-05-06 | 2017-09-08 | 广东威林工程塑料股份有限公司 | It is a kind of for polyamide compoiste material of energy-saving lamp holder and preparation method thereof |
| CN107815106A (en) * | 2017-11-17 | 2018-03-20 | 江门市荣龙新材料科技有限公司 | Composite of high temperature resistant color inhibition long carbon chain nylon 11 and preparation method thereof |
| CN108285640A (en) * | 2017-12-26 | 2018-07-17 | 浙江普利特新材料有限公司 | A kind of resisting high-temperature yellowing nylon material and preparation method thereof |
-
2021
- 2021-10-29 CN CN202111267456.0A patent/CN113881224A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105295369A (en) * | 2015-11-17 | 2016-02-03 | 芜湖信宁新材料科技有限公司 | High temperature resistant nylon material composition and preparation method of high temperature resistant nylon |
| CN107141785A (en) * | 2017-05-06 | 2017-09-08 | 广东威林工程塑料股份有限公司 | It is a kind of for polyamide compoiste material of energy-saving lamp holder and preparation method thereof |
| CN107815106A (en) * | 2017-11-17 | 2018-03-20 | 江门市荣龙新材料科技有限公司 | Composite of high temperature resistant color inhibition long carbon chain nylon 11 and preparation method thereof |
| CN108285640A (en) * | 2017-12-26 | 2018-07-17 | 浙江普利特新材料有限公司 | A kind of resisting high-temperature yellowing nylon material and preparation method thereof |
Non-Patent Citations (3)
| Title |
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| 张来胜;王婷兰;唐颂超;孟庆国;张祥福;: "挤出循环对玻纤增强PA66复合材料流变性能和力学性能的影响", 华东理工大学学报(自然科学版) * |
| 王义亮;朱春林;张勇;邱桂学;: "聚邻苯二甲酰胺高温尼龙的耐黄变研究", 工程塑料应用 * |
| 谌继宗;: "耐热抗氧化尼龙6切片的制备与性能研究", 化纤与纺织技术 * |
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