CN114891345A - Electroplated nylon PA6 lamp housing material and preparation method thereof - Google Patents
Electroplated nylon PA6 lamp housing material and preparation method thereof Download PDFInfo
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- CN114891345A CN114891345A CN202210591734.6A CN202210591734A CN114891345A CN 114891345 A CN114891345 A CN 114891345A CN 202210591734 A CN202210591734 A CN 202210591734A CN 114891345 A CN114891345 A CN 114891345A
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- 239000000463 material Substances 0.000 title claims abstract description 50
- 239000004677 Nylon Substances 0.000 title claims abstract description 45
- 229920001778 nylon Polymers 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000007822 coupling agent Substances 0.000 claims abstract description 37
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010445 mica Substances 0.000 claims abstract description 22
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 239000010703 silicon Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 46
- 230000003078 antioxidant effect Effects 0.000 claims description 45
- 239000000314 lubricant Substances 0.000 claims description 34
- 239000011347 resin Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 15
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 11
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 8
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical group OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 229920002545 silicone oil Polymers 0.000 claims description 7
- BBJZBUKUEUXKDJ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)-n-[1-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoylamino]hexyl]propanamide Chemical compound C=1C(C(C)(C)C)=C(O)C(C(C)(C)C)=CC=1CCC(=O)NC(CCCCC)NC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BBJZBUKUEUXKDJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical group CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 5
- 241000258971 Brachiopoda Species 0.000 claims description 3
- 239000011257 shell material Substances 0.000 claims description 2
- 238000009713 electroplating Methods 0.000 abstract description 32
- 239000000945 filler Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000007747 plating Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 5
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 7
- 229910052627 muscovite Inorganic materials 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 150000001408 amides Chemical group 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
Classifications
-
- 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
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/016—Additives defined by their aspect ratio
-
- 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
-
- 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
Abstract
The invention discloses a high-strength high-heat-resistance dimension-stable electroplated nylon PA6 lamp housing material and a preparation method thereof. According to the invention, the talcum powder with high mesh number and high silicon content is selected and compounded with the mica powder with high diameter-thickness ratio and small particle size, so that the strength, heat resistance and size stability of the nylon PA6 are obviously improved; the filler is activated by a coupling agent, and the binding force with nylon is enhanced by adding a compatilizer, so that the strength and heat resistance of the nylon are greatly enhanced, the problems that some nylon PA6 is not strong enough, and deformation is caused by overhigh temperature during electroplating are solved, and the surface effect of electroplating is improved. The water and volatile matters in the system are optimized and controlled through the formula, and the electroplating surface effect is improved, so that the electroplating nylon PA6 lamp housing material has the following characteristics: 1. high mechanical strength, heat resistance and dimensional stability; 2. the electroplating yield is high, and the stability is good; 3. the plating layer has good binding force, and has no obvious shedding in a hundred-grid test; 4. the electroplated surface has no obvious defects such as pits and the like.
Description
The invention relates to a high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material and a divisional application of a preparation method thereof, wherein the application date of the high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material is 06/04/2019.
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-strength high-heat-resistance dimension-stable electroplated nylon PA6 lamp housing material and a preparation method thereof.
Background
Many types of plastics, but not all plastics, can be plated. The binding force between some plastics and the metal layer is poor, and the practical value is not high; some plastics and metal coatings have too large difference of certain physical properties such as expansion coefficients, and the service performance of the plastics and the metal coatings is difficult to ensure in a high temperature difference environment. The most used for electroplating today is ABS, followed by PP. The unmodified nylon PA6 has poor strength and heat resistance, poor dimensional stability, difficulty in meeting the temperature use condition of the car lamp, unsatisfactory electroplating effect, high electroplating defective rate, and the defects of pockmarks on the electroplating surface, peeling, poor coating bonding force and the like. The modified nylon PA6 has high mechanical strength and heat resistance, and is suitable for being used for electroplated parts such as lamp shells of vehicle lamps, so that the development of a high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp shell material is needed.
Disclosure of Invention
In order to overcome the defects, the invention provides a high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problem is as follows: a high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material comprises the following materials in parts by weight:
60-75 parts of PA6 resin, 20-30 parts of talcum powder, 10-20 parts of mica powder, 0.1-0.5 part of coupling agent, 2-5 parts of compatilizer, 0.5-1 part of lubricant A, 0.5-1 part of lubricant B, 0.2-0.5 part of main antioxidant and 0.2-0.5 part of auxiliary antioxidant;
as a further improvement of the invention, the PA6 resin has a viscosity of 0.26-0.28, so that the material has sufficient fluidity.
As a further improvement of the invention, the talcum powder is high-mesh talcum powder with the mesh number of 2000-3000, and has extremely high silicon content of 62%.
As a further improvement of the invention, the mica powder is a high-number high-diameter-thickness ratio muscovite, the particle diameter of the muscovite is 18 mu m, and the diameter-thickness ratio of the muscovite is 80.
As a further improvement of the invention, the coupling agent is a 1:1 compound of a titanate coupling agent and a silane coupling agent, the titanate coupling agent is of a monoalkoxyl type, and the silane coupling agent is N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane.
As a further improvement of the invention, the compatilizer is POE grafted maleic anhydride polymer.
As a further improvement of the invention, the lubricant A is pentaerythritol stearate and the lubricant B is silicone oil. Pentaerythritol stearate has good thermal stability and low volatility at high temperatures. Because of no color development groups such as amide and the like, the product does not yellow or change color, the original color of the product can be kept, and the color of the product can be improved. Good flowing and demoulding characteristics, improves the dispersibility of the filler and is beneficial to improving the electroplating effect.
In a further improvement of the present invention, the primary antioxidant is a hindered phenol antioxidant, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine. The modified nylon has good compatibility with nylon, high heat resistance and low volatility, reduces the performance loss caused by degradation in the PA6 processing process, and reduces the influence on electroplating property.
As a further improvement of the invention, the auxiliary antioxidant is a phosphite antioxidant. The compound has good synergistic effect with hindered phenol antioxidants.
A preparation method of a high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material comprises the following steps:
(1) accurately weighing talcum powder, mica powder and lubricant according to the weight ratio, adding into a high-speed mixer, heating to 100 ℃, weighing the coupling agent in the formula, adding into a stirrer, stirring for 20min, and discharging for later use;
(2) accurately weighing the PA6 raw material, the compatilizer and other granules in the formula, adding the filler which is activated in the step (1), and stirring for 10 min;
(3) adding the mixed material obtained in the step (2) into a double-screw extruder hopper, setting the temperature of a screw cylinder at 230-250 ℃, and enabling a machine head to be 250 ℃;
(4) the high-strength high-heat-resistance dimensionally stable electroplating nylon PA6 material is prepared by extrusion, water cooling, air drying and grain cutting.
According to the invention, the talcum powder with high mesh number and high silicon content is selected and compounded with the mica powder with high diameter-thickness ratio and small particle size, so that the strength, heat resistance and size stability of the nylon PA6 are obviously improved; the filler is activated by a coupling agent, and the binding force with nylon is enhanced by adding a compatilizer, so that the strength and heat resistance of the nylon are greatly enhanced, the problems of insufficient strength of some nylon PA6, deformation caused by overhigh temperature during electroplating and the like are solved, and the surface effect of electroplating is improved; the water and volatile matters in the system are optimized and controlled through the formula, and the surface effect of electroplating is improved.
The electroplated nylon PA6 lamp housing material has the following characteristics: 1. high mechanical strength, heat resistance and dimensional stability; 2. the electroplating yield is high, and the stability is good; 3. the plating layer has good binding force, and has no obvious shedding in a hundred-grid test; 4. the electroplated surface has no obvious defects such as pits and the like.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example one
A high-strength high-heat-resistance dimensionally stable electroplating nylon PA6 material comprises the following materials in parts by weight:
72 parts of PA6 resin, 20 parts of talcum powder, 5 parts of mica powder, 0.2 part of coupling agent, 3 parts of compatilizer, 0.3 part of lubricant A, 0.2 part of lubricant B, 0.2 part of main antioxidant and 0.2 part of auxiliary antioxidant.
The PA6 resin has a relative viscosity of 0.27, and ensures that the material has enough fluidity.
The talcum powder is high in mesh number, 2000 meshes and extremely high in silicon content, and the silicon content is 60%.
The mica powder is muscovite with a high number and a high diameter-thickness ratio, the particle diameter of the muscovite is 28 mu m, and the diameter-thickness ratio is 70.
The coupling agent is a 1:1 compound of a titanate coupling agent and a silane coupling agent. The titanate coupling agent is of a single alkoxy type, the silane coupling agent is N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, the reaction activity is high, the bonding force between the resin and the filler is greatly improved after the two are compounded, the dispersibility of the filler is improved, and the mechanical property and the electroplating property of the material are obviously improved.
The compatilizer is POE grafted maleic anhydride polymer.
The lubricant A is pentaerythritol stearate.
Pentaerythritol stearate has good thermal stability and low volatility at high temperatures. Because of no color development groups such as amide and the like, the product does not yellow or change color, the original color of the product can be kept, and the color of the product can be improved. Good flowing and demoulding characteristics, improves the dispersibility of the filler and is beneficial to improving the electroplating effect.
And the lubricant B is silicone oil.
The main antioxidant is a hindered phenol antioxidant, and N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine has good compatibility with nylon, high heat resistance and low volatility, reduces the performance loss caused by degradation in the PA6 processing process, and reduces the influence on electroplating property.
The auxiliary antioxidant is a phosphite antioxidant and has a good synergistic effect by compounding with a hindered phenol antioxidant.
The preparation method comprises the following steps:
(1) accurately weighing talcum powder, mica powder and lubricant according to the weight ratio, adding into a high-speed mixer, heating to 100 ℃, weighing the coupling agent in the formula, adding into a stirrer, stirring for 20min, and discharging for later use.
(2) Accurately weighing the PA6 raw material, the compatilizer and other granules in the formula, adding the filler which is activated in the step (1), and stirring for 10 min.
(3) And (3) adding the mixed material obtained in the step (2) into a double-screw extruder hopper, setting the temperature of a screw cylinder to be 230-250 ℃, and enabling the temperature of a machine head to be 250 ℃.
(4) The high-strength high-heat-resistance dimensionally stable electroplating nylon PA6 material is prepared by extrusion, water cooling, air drying and grain cutting.
The performance test results are as follows:
performance of | Unit of | Market like product | Example one |
Tensile strength | MPa | 55 | 70 |
Elongation at break | % | 5 | 10 |
Bending strength | MPa | 90 | 100 |
Flexural modulus | MPa | 4500 | 5000 |
Impact strength of cantilever beam | KJ/M 2 | 4.5 | 6 |
Heat distortion temperature | ℃ | 80 | 100 |
Plating performance | With falling-off in the hundred-grid test | No obvious drop-off in the test of hundreds of cases |
Example two
A high-strength high-heat-resistance dimensionally stable electroplating nylon PA6 material comprises the following materials in parts by weight:
68 parts of PA6 resin, 20 parts of talcum powder, 8 parts of mica powder, 0.2 part of coupling agent, 4 parts of compatilizer, 0.5 part of lubricant A, 0.2 part of lubricant B, 0.2 part of main antioxidant and 0.2 part of auxiliary antioxidant.
The PA6 resin is polyamide, the relative viscosity is 0.27, and the sufficient fluidity of the material is ensured.
The talcum powder is high in mesh number, 3000 meshes and extremely high in silicon content, and the silicon content is 62%.
The mica powder is muscovite with a high number and a high diameter-thickness ratio, the particle diameter is 18 mu m, and the diameter-thickness ratio is 80.
The coupling agent is a 1:1 compound of a titanate coupling agent and a silane coupling agent. The titanate coupling agent is of a single alkoxy type, the silane coupling agent is N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane, the reaction activity is high, the bonding force between the resin and the filler is greatly improved after the titanate coupling agent and the silane coupling agent are compounded, the dispersibility of the filler is improved, and the mechanical property and the electroplating property of the material are obviously improved.
The compatilizer is POE grafted maleic anhydride polymer.
The lubricant A is pentaerythritol stearate.
Pentaerythritol stearate has good thermal stability and low volatility at high temperatures. Because of no color development groups such as amide and the like, the product does not yellow or change color, the original color of the product can be kept, and the color of the product can be improved. Good flowing and demoulding characteristics, improves the dispersibility of the filler and is beneficial to improving the electroplating effect.
And the lubricant B is silicone oil.
The main antioxidant is a hindered phenol antioxidant, and N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine has good compatibility with nylon, high heat resistance and low volatility, reduces the performance loss caused by degradation in the PA6 processing process, and reduces the influence on electroplating property.
The auxiliary antioxidant is a phosphite antioxidant and has a good synergistic effect by compounding with a hindered phenol antioxidant.
The preparation method comprises the following steps:
(1) accurately weighing talcum powder, mica powder and lubricant according to the weight ratio, adding into a high-speed mixer, heating to 100 ℃, weighing the coupling agent in the formula, adding into a stirrer, stirring for 20min, and discharging for later use.
(2) Accurately weighing the PA6 raw material, the compatilizer and other granules in the formula, adding the filler which is activated in the step (1), and stirring for 10 min.
(3) And (3) adding the mixed material obtained in the step (2) into a double-screw extruder hopper, setting the temperature of a screw cylinder to be 230-250 ℃, and enabling the temperature of a machine head to be 250 ℃.
(4) The high-strength high-heat-resistance electroplating nylon PA6 material with stable size is prepared by extrusion, water cooling, air drying and grain cutting
The performance test results are as follows:
performance of | Unit of | Market like product | Example two |
Tensile strength | MPa | 55 | 72 |
Elongation at break | % | 5 | 12 |
Bending strength | MPa | 90 | 105 |
Flexural modulus | MPa | 4500 | 5200 |
Impact strength of cantilever beam | KJ/M 2 | 4.5 | 6.5 |
Heat distortion temperature | ℃ | 80 | 105 |
Plating performance | With falling-off in the hundred-grid test | No obvious drop-off in the test of hundreds of cases |
EXAMPLE III
A high-strength high-heat-resistance dimensionally stable electroplating nylon PA6 material comprises the following materials in parts by weight:
65 parts of PA6 resin, 20 parts of talcum powder, 10 parts of mica powder, 0.3 part of coupling agent, 5 parts of compatilizer, 0.5 part of lubricant A, 0.5 part of lubricant B, 0.2 part of main antioxidant and 0.2 part of auxiliary antioxidant.
The PA6 resin is polyamide, the relative viscosity is 0.27, and the sufficient fluidity of the material is ensured.
The talcum powder is high in mesh number, 3000 meshes and extremely high in silicon content, and the silicon content is 62%.
The mica powder is muscovite with a high number and a high diameter-thickness ratio, the particle diameter is 18 mu m, and the diameter-thickness ratio is 80.
The coupling agent is a 1:1 compound of a titanate coupling agent and a silane coupling agent. The titanate coupling agent is of a single alkoxy type, the silane coupling agent is N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, the reaction activity is high, the bonding force between the resin and the filler is greatly improved after the two are compounded, the dispersibility of the filler is improved, and the mechanical property and the electroplating property of the material are obviously improved.
The compatilizer is POE grafted maleic anhydride polymer.
The lubricant A is pentaerythritol stearate.
Pentaerythritol stearate has good thermal stability and low volatility at high temperatures. Because of no color development groups such as amide and the like, the product does not yellow or change color, the original color of the product can be kept, and the color of the product can be improved. Good flowing and demoulding characteristics, improves the dispersibility of the filler and is beneficial to improving the electroplating effect.
And the lubricant B is silicone oil.
The main antioxidant is a hindered phenol antioxidant, and N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine has good compatibility with nylon, high heat resistance and low volatility, reduces the performance loss caused by degradation in the PA6 processing process, and reduces the influence on electroplating property.
The auxiliary antioxidant is a phosphite antioxidant and has a good synergistic effect by compounding with a hindered phenol antioxidant.
The preparation method comprises the following steps:
(1) accurately weighing talcum powder, mica powder and lubricant according to the weight ratio, adding into a high-speed mixer, heating to 100 ℃, weighing the coupling agent in the formula, adding into a stirrer, stirring for 20min, and discharging for later use.
(2) Accurately weighing the PA6 raw material, the compatilizer and other granules in the formula, adding the filler which is activated in the step (1), and stirring for 10 min.
(3) And (3) adding the mixed material obtained in the step (2) into a double-screw extruder hopper, setting the temperature of a screw cylinder to be 230-250 ℃, and enabling the temperature of a machine head to be 250 ℃.
(4) The high-strength high-heat-resistance electroplating nylon PA6 material with stable size is prepared by extrusion, water cooling, air drying and grain cutting
The performance test results are as follows:
performance of | Unit of | Market like product | EXAMPLE III |
Tensile strength | MPa | 55 | 75 |
Elongation at break | % | 5 | 15 |
Bending strength | MPa | 90 | 110 |
Flexural modulus | MPa | 4500 | 5500 |
Impact strength of cantilever beam | KJ/M 2 | 4.5 | 7 |
Heat distortion temperature | ℃ | 80 | 110 |
Plating performance | With falling-off in the hundred-grid test | No obvious drop-off in the test of hundreds of cases |
Compared with similar products in the market, the electroplated nylon PA6 lamp housing material prepared by the invention has the following characteristics: 1. high mechanical strength, heat resistance and dimensional stability; 2. the electroplating yield is high, and the stability is good; 3. the plating layer has good binding force, and has no obvious shedding in a hundred-grid test; 4. the electroplated surface has no obvious defects such as pits and the like.
Claims (9)
1. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material is characterized in that: the material comprises the following materials in parts by weight:
60-75 parts of PA6 resin, 20-30 parts of talcum powder, 10-20 parts of mica powder, 0.1-0.5 part of coupling agent, 2-5 parts of compatilizer, 0.5-1 part of lubricant A, 0.5-1 part of lubricant B, 0.2-0.5 part of main antioxidant and 0.2-0.5 part of auxiliary antioxidant;
the relative viscosity of the PA6 resin is 0.26-0.28;
the talcum powder is 2000-3000 meshes, and the silicon content is 62%;
the particle size of the mica powder is 18 mu m, and the diameter-thickness ratio is 80;
the coupling agent is a compound of a titanate coupling agent and a silane coupling agent in a mass ratio of 1:1, the titanate coupling agent is of a monoalkoxyl type, and the silane coupling agent is N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane.
2. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material as claimed in claim 1, wherein: the lubricant A is pentaerythritol stearate.
3. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material as claimed in claim 1, wherein: and the lubricant B is silicone oil.
4. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material as claimed in claim 1, wherein: the compatilizer is POE grafted maleic anhydride polymer.
5. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material as claimed in claim 1, wherein: the main antioxidant is hindered phenol antioxidant N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine.
6. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material as claimed in claim 1, wherein: the auxiliary antioxidant is phosphite antioxidant.
7. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material is characterized in that: the material comprises the following materials in parts by weight:
72 parts of PA6 resin, 20 parts of talcum powder, 5 parts of mica powder, 0.2 part of coupling agent, 3 parts of compatilizer, 0.3 part of lubricant A, 0.2 part of lubricant B, 0.2 part of main antioxidant and 0.2 part of auxiliary antioxidant;
the relative viscosity of the PA6 resin is 0.27;
the talcum powder is 2000 meshes, and the silicon content is 60%;
the particle size of the mica powder is 28 micrometers, and the diameter-thickness ratio is 70;
the coupling agent is a compound of a titanate coupling agent and a silane coupling agent in a mass ratio of 1:1, the titanate coupling agent is of a monoalkoxyl type, and the silane coupling agent is N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane;
the compatilizer is POE grafted maleic anhydride polymer;
the lubricant A is pentaerythritol stearate;
the lubricant B is silicone oil;
the main antioxidant is hindered phenol antioxidant N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine;
the auxiliary antioxidant is phosphite antioxidant.
8. A high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp housing material is characterized in that: the material comprises the following materials in parts by weight:
68 parts of PA6 resin, 20 parts of talcum powder, 8 parts of mica powder, 0.2 part of coupling agent, 4 parts of compatilizer, 0.5 part of lubricant A, 0.2 part of lubricant B, 0.2 part of main antioxidant and 0.2 part of auxiliary antioxidant;
the relative viscosity of the PA6 resin is 0.27;
the talcum powder is 3000 meshes, and the silicon content is 62%;
the particle size of the mica powder is 18 mu m, and the diameter-thickness ratio is 80;
the coupling agent is a compound of a titanate coupling agent and a silane coupling agent in a mass ratio of 1:1, the titanate coupling agent is of a monoalkoxyl type, and the silane coupling agent is N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane;
the compatilizer is POE grafted maleic anhydride polymer;
the lubricant A is pentaerythritol stearate;
the lubricant B is silicone oil;
the main antioxidant is hindered phenol antioxidant N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine;
the auxiliary antioxidant is phosphite antioxidant.
9. A method for preparing the high-strength high-heat-resistance dimensionally stable electroplated nylon PA6 lamp envelope material of any one of claims 1-8, comprising the steps of:
(1) accurately weighing the talcum powder, the mica powder and the lubricant according to the weight parts, adding the talcum powder, the mica powder and the lubricant into a high-speed mixer, heating to 100 ℃, weighing the coupling agent in the formula, adding the coupling agent into a stirrer, stirring for 20min, and discharging for later use;
(2) accurately weighing other component granules in the formula, adding the activated component in the step (1), and stirring for 10 min;
(3) adding the mixed material in the step (2) into a double-screw extruder hopper, setting the temperature of a screw cylinder at 230-250 ℃, and using a machine head at 250 ℃;
(4) the high-strength high-heat-resistance and stable-size electroplated nylon PA lamp shell material is prepared by extrusion, water cooling, air drying and grain cutting.
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CN111269561A (en) * | 2020-03-26 | 2020-06-12 | 合肥卡洛塑业科技有限公司 | Polyamide 6 composition and application thereof |
CN113667297B (en) * | 2021-09-03 | 2024-03-26 | 惠州市良化新材料有限公司 | Nylon composite material with low water absorption rate |
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