CN115746556A - Low-mold-fouling halogen-free flame-retardant reinforced nylon material and preparation method and application thereof - Google Patents

Low-mold-fouling halogen-free flame-retardant reinforced nylon material and preparation method and application thereof Download PDF

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CN115746556A
CN115746556A CN202211509001.XA CN202211509001A CN115746556A CN 115746556 A CN115746556 A CN 115746556A CN 202211509001 A CN202211509001 A CN 202211509001A CN 115746556 A CN115746556 A CN 115746556A
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halogen
free flame
mold
fouling
retardant
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CN115746556B (en
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刘鑫鑫
陈平绪
叶南飚
郑一泉
罗忠富
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Kingfa Science and Technology Co Ltd
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Abstract

The invention discloses a low-mold-fouling halogen-free flame-retardant reinforced nylon material and a preparation method and application thereof, and relates to the field of high polymer materials. The flame retardant comprises nylon resin, glass fiber, a halogen-free flame retardant, an antioxidant, a lubricant and Fischer-Tropsch wax, wherein the halogen-free flame retardant is prepared from aluminum diethylphosphinate, melamine polyphosphate and zinc borate according to the mass ratio of (3-7): 1, (0-2) compounding. This application adopts fischer-tropsch wax to replace the white oil of traditional interpolation, can show and reduce melt viscosity, reduces the degradation of fire retardant in the course of working, and the content of the production of acid material reduces, and the nylon degradation reduces, adopts the steamed fire retardant of complex nothing simultaneously, coordinates the production that reduces the mould dirt, and fischer-tropsch wax helps with the effectual dispersion of powder such as fire retardant at compounding in-process simultaneously, reduces the production of mould dirt when fire behaviour is superior.

Description

Low-mold-fouling halogen-free flame-retardant reinforced nylon material and preparation method and application thereof
Technical Field
The invention relates to the field of high polymer materials, in particular to a low-mold-fouling halogen-free flame-retardant reinforced nylon material and a preparation method and application thereof.
Background
The polyamide is named as nylon because the main chain of the polyamide contains repeated amide groups- [ NHCO ] -, and because the molecular structure of the polyamide has polar amide groups, stronger hydrogen bonding effect is formed among molecular chains, the polyamide has higher crystallinity, and the polyamide has the largest yield, the largest variety, the widest application and the most excellent comprehensive performance in five general engineering plastics. Traditional flame-retardant high-temperature nylon adopts a brominated flame retardant for flame retardation, but with the issue of Rohs instructions for limiting and prohibiting the use of toxic substances and WEEE instructions for treating waste electronic equipment in the European Union, the electronic and electrical industry, particularly the connector industry, basically adopts a non-halogenated scheme.
In the halogen-free flame-retardant nylon product, acidic substances are generated in the processing process of the flame retardant to cause the degradation of nylon, meanwhile, micromolecular substances generated by the self decomposition of the flame retardant can be continuously enriched on a mold to generate mold scale, the powder content of the flame retardant in the system is high, and in order to uniformly mix inorganic materials in the product, a certain amount of white oil needs to be added in the system, so that more oily mold scale can be generated in the sample injection molding process, the mold cleaning frequency is high, and the processing efficiency is low.
Disclosure of Invention
The invention provides a low-mold-scale halogen-free flame-retardant reinforced nylon material, and a preparation method and application thereof, which are used for reducing mold scale generated in the material injection molding process and improving the flame retardant property and the working efficiency.
In order to solve the technical problems, the invention provides a low-mold-fouling halogen-free flame-retardant reinforced nylon material, which comprises the following components in parts by weight:
nylon resin: 40-65 parts;
glass fiber: 5-40 parts of a stabilizer;
halogen-free flame retardant: 13-20 parts;
antioxidant: 0.1 to 0.8 portion;
lubricant: 0.3 to 1 portion;
Fischer-Tropsch wax: 0.1 to 0.5 portion;
wherein the halogen-free flame retardant is prepared from aluminum diethylphosphinate, melamine polyphosphate and zinc borate according to the mass ratio of (3-7): 1, (0-2) compounding.
By adopting the above scheme, adopt the Fischer-Tropsch wax to replace the white oil of tradition interpolation, can show and reduce melt viscosity, reduce the degradation of fire retardant in the course of working, the content of the production of acidic material reduces, nylon degradation also reduces, the production of the reduction mould dirt that the result can be obvious, the clear up frequency of mould is obvious reduces, fischer-Tropsch wax helps with the effectual dispersion of powder such as fire retardant in compounding process simultaneously, combine compound fire retardant system, under the prerequisite that keeps excellent flame retardant efficiency, reduce the production of mould dirt, improve the comprehensive properties of nylon materials.
Preferably, the toner also comprises 0.1 to 0.5 weight part of toner.
Preferably, the average diameter of the glass fiber is 8 μm to 15 μm.
By adopting the scheme, the glass fiber has a reinforcing effect on the nylon resin, the mechanical property of the product can be met, meanwhile, the addition amount of the flame retardant can be properly reduced by adding the glass fiber, and the excellent flame retardant property is ensured.
Preferably, the nylon resin is adipic acid hexamethylene diamine copolymer and/or caprolactam copolymer.
Preferably, the Fischer-Tropsch wax has an average molecular weight of 800-1200 and a melting point of 80-105 ℃.
Preferably, the antioxidant is one or more of 1010, 1076, 1098 and 168.
Preferably, the lubricant is one or more of silicone powder, stearate, amide and fatty ester.
Preferably, the composition comprises the following components in parts by weight:
nylon resin: 45-58 parts of;
glass fiber: 10-35 parts;
halogen-free flame retardant: 14-18 parts;
antioxidant: 0.2 to 0.5 portion;
lubricant: 0.5 to 0.8 portion;
Fischer-Tropsch wax: 0.2 to 0.3 portion;
toner: 0.2 to 0.4 portion.
In order to solve the above technical problems, the second object of the present invention is to provide a method for preparing a low-mold-fouling halogen-free flame-retardant reinforced nylon material, comprising the following steps:
(1) Weighing all the raw materials except the glass fiber, and premixing in high-mixing equipment to obtain premix;
(2) And (3) putting the premix into a double-screw extrusion device for melt mixing, carrying out side feeding on glass fibers, and carrying out extrusion granulation to obtain the halogen-free flame-retardant reinforced nylon material.
In order to solve the technical problems, the invention also provides application of the low-mold-fouling halogen-free flame-retardant reinforced nylon material in the field of electronic and electrical products or photovoltaic products, such as products of relays, low-voltage electric appliances, photovoltaic nuts and the like.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
this application adopts the Fischer-Tropsch wax to replace the white oil of tradition interpolation, can show and reduce melt viscosity, reduce the degradation of fire retardant in the course of working, the content of the production of acidic material reduces, the nylon degradation reduces, the production of the reduction mould dirt that the result can be obvious, fischer-Tropsch wax helps with the effectual dispersion of powder at the compounding in-process simultaneously, it is better to make fire retardant powder mix in the system, combine compound fire retardant system, under the prerequisite that keeps excellent flame retardant efficiency, reduce the production of mould dirt, improve the comprehensive properties of nylon materials.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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 following table 1 shows the sources of the raw materials in the examples and comparative examples of the present application, and the lubricants, toners, and antioxidants were all commercially available and used in the parallel experiments, unless otherwise specified.
TABLE 1-Source and Performance parameters of the Main raw materials in the examples of the present application and comparative examples
Figure BDA0003969848460000041
Examples 1 to 10
A low-mold-scale halogen-free flame-retardant reinforced nylon material is shown in Table 2 and comprises nylon resin, glass fiber, a halogen-free flame retardant, fischer-Tropsch wax, an antioxidant, a lubricant and toner, wherein the nylon resin is adipic acid hexamethylene diamine copolymer or caprolactam copolymer; the halogen-free flame retardant is prepared from (3-7) by mass: 1: (0-2) a mixture of aluminum diethylhypophosphite, melamine polyphosphate, and zinc borate; the antioxidant is 1010 and 168 according to the mass ratio of 1:1, mixing; the lubricant is magnesium stearate.
The preparation method of the low-mold-scale halogen-free flame-retardant reinforced nylon material comprises the following steps:
(1) Weighing raw materials of nylon resin, halogen-free flame retardant, fischer-Tropsch wax, antioxidant, toner and lubricant according to a certain proportion, and premixing in a high-speed mixer to obtain premix;
(2) And then putting the premix into a double-screw extruder for melt mixing, feeding glass fibers laterally, extruding and granulating through a section 5 screw cylinder to obtain the halogen-free flame-retardant reinforced nylon material.
TABLE 2 Components and amounts in examples 1-10 of the present application
Figure BDA0003969848460000051
Figure BDA0003969848460000061
Comparative example 1
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the same steps as the embodiment 3 in terms of reagents and process parameters, and is characterized in that Fischer-Tropsch wax is replaced by PE wax.
Comparative example 2
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the same steps as the example 3 in terms of reagents and process parameters, and is different from the method in that Fischer-Tropsch wax is replaced by white oil.
Comparative example 3
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the same steps as the embodiment 3 in terms of reagents and process parameters, and is different from the embodiment in that the halogen-free flame retardant is zinc borate.
Comparative example 4
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the same steps, reagents used in the steps and process parameters as those in example 3, and is characterized in that the halogen-free flame retardant is diethyl aluminum hypophosphite.
Comparative example 5
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the same steps as the embodiment 3 in terms of reagents and process parameters, and is different from the embodiment in that the halogen-free flame retardant is melamine polyphosphate.
Comparative example 6
The low-mold-fouling halogen-free flame-retardant reinforced nylon material comprises the following steps, reagents used in the steps and process parameters are the same as those in example 3, and the difference is that the halogen-free flame retardant comprises the following components in a mass ratio of 1:1:3 diethyl aluminum hypophosphite, melamine polyphosphate and zinc borate.
Performance test
1. Mold fouling amount: after subjecting the materials of examples 1 to 10 and comparative examples 1 to 6 to a 200-mold continuous injection molding, mold scales on the mold were collected and the results of weighing the mold scales are shown in Table 3.
2. And (3) testing the flame retardant property: the materials of examples 1-10 and comparative examples 1-6 were tested for vertical flammability according to GB/T2408-2008, with test bars having a thickness of 0.8mm and flame retardant ratings of V-0, V-1, V-2 and none.
TABLE 3 Performance test tests of examples 1-10 and comparative examples 1-6
Detecting items Mold scale mass (mg) Flame retardant rating
Example 1 0.95 V-0
Example 2 0.89 V-0
Example 3 0.91 V-0
Example 4 0.86 V-0
Example 5 0.93 V-0
Example 6 0.93 V-0
Example 7 1.13 V-0
Example 8 1.08 V-0
Example 9 0.91 V-0
Example 10 0.94 V-0
Comparative example 1 2.85 V-1
Comparative example 2 2.48 V-1
Comparative example 3 0.23 Without hierarchy
Comparative example 4 1.57 V-1
Comparative example 5 1.89 Without grade
Comparative example 6 0.44 Without hierarchy
The performance test results of example 3 and comparative examples 1-2 in table 3 show that the mold deposit yield of the product is increased and obviously separated out when white oil is adopted, and the mold deposit yield of the product is increased and the flame retardant performance is reduced when PE wax is adopted; the Fischer-Tropsch wax is adopted to replace the white oil which is added traditionally, so that the melt viscosity can be obviously reduced, the degradation of the flame retardant in the processing process is reduced, the content of the generated acidic substances is reduced, the nylon degradation is reduced, the generation of mold fouling can be obviously reduced, meanwhile, the Fischer-Tropsch wax is beneficial to effectively dispersing the flame retardant and other powder in the material mixing process, and the flame retardant performance of the material cannot be influenced; the mold fouling quality of the final material is controlled below 1.13mg, and the flame retardant grade reaches V-0.
The performance test results of examples 3, 7-8 and comparative examples 3-6 in table 3 show that more mold scale is generated due to the independent addition of aluminum diethylphosphinate or melamine polyphosphate, while the influence of zinc borate on the mold scale of the product is small, but the flame retardant performance is low, and the product performance is easily influenced if the addition amount is too large; the application utilizes aluminum diethylphosphinate, melamine polyphosphate and zinc borate according to the weight ratio of (3-7): 1 (0-2), can reduce the generation of mold fouling to the maximum extent under the condition of the same addition amount of the flame retardant, and simultaneously improve the flame retardant efficiency.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims (10)

1. The low-mold-fouling halogen-free flame-retardant reinforced nylon material is characterized by comprising the following components in parts by weight:
nylon resin: 40-65 parts;
glass fiber: 5-40 parts of a stabilizer;
halogen-free flame retardant: 13-20 parts;
antioxidant: 0.1 to 0.8 portion;
lubricant: 0.3 to 1 portion;
Fischer-Tropsch wax: 0.1 to 0.5 portion;
wherein the halogen-free flame retardant is prepared from aluminum diethylphosphinate, melamine polyphosphate and zinc borate according to the mass ratio of (3-7): 1, (0-2) compounding.
2. The low-mold-fouling halogen-free flame-retardant reinforced nylon material as claimed in claim 1, further comprising 0.1 to 0.5 parts by weight of a toner.
3. The low-mold-fouling halogen-free flame-retardant reinforced nylon material of claim 1, wherein the nylon resin is an adipic acid hexamethylene diamine copolymer and/or a caprolactam copolymer.
4. The low mold fouling, halogen free, flame retardant reinforced nylon material of claim 1 wherein the Fischer-Tropsch wax has an average molecular weight of 800 to 1200 and a melting point of 80 ℃ to 105 ℃.
5. The low-mold-fouling halogen-free flame-retardant reinforced nylon material of claim 1 wherein the antioxidant is one or more of 1010, 1076, 1098 and 168.
6. The low-mold-fouling halogen-free flame-retardant reinforced nylon material as claimed in claim 1, wherein the lubricant is one or more of silicone powder, stearate, amide and fatty ester.
7. The low-mold-fouling halogen-free flame-retardant reinforced nylon material of claim 1, wherein the average diameter of the glass fiber is 8 μm to 15 μm.
8. The low-mold-fouling halogen-free flame-retardant reinforced nylon material as claimed in claim 1, which comprises the following components in parts by weight:
nylon resin: 45-58 parts;
glass fiber: 10-35 parts;
halogen-free flame retardant: 14-18 parts;
antioxidant: 0.2 to 0.5 portion;
lubricant: 0.5 to 0.8 portion;
Fischer-Tropsch wax: 0.2 to 0.3 portion;
toner: 0.2-0.4 part.
9. The preparation method of the low-mold-fouling halogen-free flame-retardant reinforced nylon material as set forth in any one of claims 1 to 8, characterized by comprising the following steps:
(1) Weighing all the raw materials except the glass fiber, and premixing in high-mixing equipment to obtain premix;
(2) And (3) putting the premix into a double-screw extrusion device for melt mixing, feeding glass fibers laterally, and extruding and granulating to obtain the halogen-free flame-retardant reinforced nylon material.
10. The use of the low-mold-fouling halogen-free flame-retardant reinforced nylon material as claimed in any one of claims 1 to 8 in the field of electronic and electrical products or photovoltaic products.
CN202211509001.XA 2022-11-29 2022-11-29 Low-modulus-scale halogen-free flame-retardant reinforced nylon material and preparation method and application thereof Active CN115746556B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953014A (en) * 1995-08-16 1997-02-25 Nippon Poripenko Kk Polyamide composition
CN106189221A (en) * 2016-08-05 2016-12-07 江苏晋伦塑料科技有限公司 A kind of halogen-free flame-retardant glass fiber strengthens nylon and its preparation method and application
CN113667296A (en) * 2021-08-30 2021-11-19 中科检测技术服务(重庆)有限公司 Heat-resistant anti-aging high polymer material and preparation method thereof
CN114874616A (en) * 2022-06-10 2022-08-09 金旸(厦门)新材料科技有限公司 Anti-yellowing low-mold-scale halogen-free flame-retardant polyamide composite material and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953014A (en) * 1995-08-16 1997-02-25 Nippon Poripenko Kk Polyamide composition
CN106189221A (en) * 2016-08-05 2016-12-07 江苏晋伦塑料科技有限公司 A kind of halogen-free flame-retardant glass fiber strengthens nylon and its preparation method and application
CN113667296A (en) * 2021-08-30 2021-11-19 中科检测技术服务(重庆)有限公司 Heat-resistant anti-aging high polymer material and preparation method thereof
CN114874616A (en) * 2022-06-10 2022-08-09 金旸(厦门)新材料科技有限公司 Anti-yellowing low-mold-scale halogen-free flame-retardant polyamide composite material and preparation method thereof

Non-Patent Citations (1)

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Title
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