CN1095480C - Preparation of silicon carbide grain-filling cast composite nylon material - Google Patents
Preparation of silicon carbide grain-filling cast composite nylon material Download PDFInfo
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- CN1095480C CN1095480C CN 00103503 CN00103503A CN1095480C CN 1095480 C CN1095480 C CN 1095480C CN 00103503 CN00103503 CN 00103503 CN 00103503 A CN00103503 A CN 00103503A CN 1095480 C CN1095480 C CN 1095480C
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- silicon
- carbide particle
- add
- silicon carbide
- nylon material
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Abstract
The present invention relates to a method for preparing a silicon carbide granule-filling cast composite nylon material. Firstly, silicon carbide granules are preprocessed; a coupling agent is added; then, the preprocessed silicon carbide granules and caprolactam monomers are mixed, heated, melted and dehydrated; finally, a catalyst, etc. can be added; casting is carried out after the materials are uniformly mixed, namely that the silicon carbide granule-filling cast composite nylon material of the present invention is prepared. The tensile strength, the bending strength, the bending elasticity modulus and the hardness of the composite material prepared by the method of the present invention are enhanced by 20% to 30%.
Description
The present invention relates to a kind of preparation method of silicon carbide grain-filling cast composite nylon material, belong to materials science field.
Monomer cast nylon is under normal pressure fused raw material caprolactam monomer to be made catalyzer with alkaline material, with auxiliary agents such as activators, directly inject the mould that is preheating to certain temperature, material carries out polyreaction soon in mould, condenses into the tough and tensile solid blank of white.The characteristics of monomer cast nylon are: light weight, density are generally 1.15～1.16; Vibration and noise reducing; Good rebound resilience; Have wear resistance and self lubricity, be suitable under the operating mode that can not add lubricant, using; The favorable mechanical performance, physical strength is more much higher than common nylon, good toughness, shock resistance, antifatigue.Monomer cast nylon obtains to use at a lot of industrial circles as the wear-resistant self-lubricating engineering plastics, as large-scale ball valve seal ring and the axle sleeve on oil, the natural gas transmission pipeline, the piston body of rig pump, various drive mechanism parts such as bearing shell, axle sleeve, ship propeller, weaving loom shuttle, gear etc.Along with the expansion of monomer cast nylon practical application, to its demands for higher performance.Particularly its low physical strength of comparing with ferrous materials is difficult to satisfy the requirement of large-scale workpiece to material property.Therefore, when keeping its good characteristic, how further to improve its mechanical property, exploitation material potential becomes and enlarges its key in application.
The objective of the invention is to propose a kind of preparation method of silicon carbide grain-filling cast composite nylon material, make this kind matrix material not only have the superperformance characteristics of monomer cast nylon, and having mechanical properties such as the tensile strength higher, flexural strength than monomer cast nylon, tribological property also is improved.Thereby can go out the higher workpiece of supporting capacity with this material preparation.
The preparation method of silicon carbide grain-filling cast composite nylon material of the present invention comprises following each step:
(1) pre-treatment of silicon-carbide particle: the coupling agent of getting the 1-4% of pending silicon-carbide particle amount, this coupling agent is dissolved in forms solution in the toluene, coupling agent is: titanic acid ester or γ-An Bingjisanyiyangjiguiwan are KH550, the silicon-carbide particle that will handle joins in the solution and fully stirred 30 minutes again, then particle is leached, in 120 ℃ of oven dry, in mortar, grind again, standby;
(2) silicon-carbide particle and the caprolactam monomer after will handling mixes, and wherein the add-on of silicon-carbide particle is for accounting for monomeric 2-8%, and granularity is 1-3 μ m; Put into about container internal heating to 120 ℃, material is melted, container vacuumizes dehydration, and vacuum tightness is 10
-1-10
-3Pa;
(3) open valve, remove vacuum, add catalyzer sodium hydroxide, add-on: with monomeric mol ratio be 0.002-0.003: 1, be evacuated to 10
-1-10
-3Pa is heated to 130 ℃
(4) open valve, remove vacuum, add the activator tolylene diisocyanate, add-on: with monomeric mol ratio be 0.002-0.003: 1, mix;
(5) be cast to rapidly in the mould that has been preheated to 160-170 ℃, be incubated the demoulding after 5 minutes, be silicon carbide grain-filling cast composite nylon material of the present invention.
With the matrix material of method preparation of the present invention, its Main Feature is: tensile strength has improved more than 30%, and flexural strength has improved more than 20%, and bending elastic modulus reaches 3400Mpa, and hardness improves 30%, all is greatly improved than monomer cast nylon; Tribological property when particularly PV value (product of load and speed) is low under DRY SLIDING and under the water lubricating condition, has had tangible improvement.
Embodiment one:
Prepare silicon-carbide particle by following step and fill the monomer cast composite nylon material:
(1) pre-treatment of silicon-carbide particle: 1.0% the titanate coupling agent of getting pending silicon-carbide particle amount, this coupling agent is dissolved in forms solution in the toluene, the silicon-carbide particle that will handle joins in the solution and fully stirred 30 minutes again, then particle is leached, in 120 ℃ of oven dry, in mortar, grind again, standby;
(2) silicon-carbide particle and the caprolactam monomer after will handling mixes, and the add-on of silicon-carbide particle is 3%, granularity 1 μ m; Put into about container internal heating to 120 ℃, material is melted, container vacuumizes dehydration, and vacuum tightness is 10
-2Pa;
(3) open valve, remove vacuum, add catalyzer sodium hydroxide, add-on: with monomeric mol ratio be 0.002: 1, be evacuated to 10
-2Pa is heated to 130 ℃;
(4) open valve, remove vacuum, add the activator tolylene diisocyanate, add-on: with monomeric mol ratio be 0.002: 1, mix;
(5) be cast to rapidly in the mould that has been preheated to 165 ℃, be incubated the demoulding after 5 minutes, promptly obtain silicon carbide grain-filling cast composite nylon material.
Embodiment two:
Prepare silicon-carbide particle by following step and fill the monomer cast composite nylon material:
(1) pre-treatment of silicon-carbide particle: 1.5% the coupling agent of getting silicon-carbide particle amount that desire handles, coupling agent is that γ-An Bingjisanyiyangjiguiwan is KH550, this coupling agent is dissolved in forms solution in the toluene, the silicon-carbide particle that will handle joins in the solution and fully stirred 30 minutes again, then particle is leached, in 120 ℃ of oven dry, in mortar, grind again, standby;
(2) silicon-carbide particle and the caprolactam monomer after will handling mixes, and the add-on of silicon-carbide particle is 6%, granularity 2 μ m; Put into about container internal heating to 120 ℃, material is melted, container vacuumizes dehydration, and vacuum tightness is 10
-3Pa;
(3) open valve, remove vacuum, add catalyzer sodium hydroxide, add-on: with monomeric mol ratio be 0.002: 1, be evacuated to 10
-3Pa is heated to 130 ℃;
(4) open valve, remove vacuum, add the activator tolylene diisocyanate, add-on: with monomeric mol ratio be 0.002: 1, mix;
(5) be cast to rapidly in the mould that has been preheated to 160 ℃, be incubated the demoulding after 5 minutes.
Embodiment three:
Prepare silicon-carbide particle by following step and fill the monomer cast composite nylon material:
(1) pre-treatment of silicon-carbide particle: 2.5% the titanate coupling agent of getting silicon-carbide particle amount that desire handles, this coupling agent is dissolved in forms solution in the toluene, the silicon-carbide particle that will handle joins in the solution and fully stirred 30 minutes again, then particle is leached, in 120 ℃ of oven dry, in mortar, grind again, standby;
(2) silicon-carbide particle after will handling is write caprolactam monomer and is mixed, and the add-on of silicon-carbide particle is 7%, granularity 3 μ m; Put into about container internal heating to 120 ℃, material is melted, container vacuumizes dehydration, and vacuum tightness is 10
-1Pa;
(3) open valve, remove vacuum, add catalyzer sodium hydroxide, add-on: with monomeric mol ratio be 0.003: 1, be evacuated to 10
-1Pa is heated to 130 ℃;
(4) open valve, remove vacuum, add the activator tolylene diisocyanate, add-on: with monomeric mol ratio be 0.003: 1, mix;
(5) be cast to rapidly in the mould that has been preheated to 178 ℃, be incubated the demoulding after 5 minutes.
Claims (1)
1, a kind of preparation method of silicon carbide grain-filling cast composite nylon material is characterized in that, this method comprises following each step:
(1) pre-treatment of silicon-carbide particle: the coupling agent of getting the 1-4 weight % of pending silicon-carbide particle amount, this coupling agent is dissolved in forms solution in the toluene, coupling agent is titanic acid ester or γ-An Bingjisanyiyangjiguiwan, the silicon-carbide particle that will handle joins in the solution and fully stirred 30 minutes again, then particle is leached, in 120 ℃ of oven dry, in mortar, grind again, standby;
(2) silicon-carbide particle and the caprolactam monomer after will handling mixes, and wherein the add-on of silicon-carbide particle is for accounting for monomeric 2-8 weight %, and granularity is 1-3 μ m; Put into about container internal heating to 120 ℃, material is melted, container vacuumizes dehydration, and vacuum tightness is 10
-1-10
-3Pa;
(3) open valve, remove vacuum, add catalyzer sodium hydroxide, sodium hydroxide and monomeric mol ratio are 0.002-0.003: 1, be evacuated to 10
-1-10
-3Pa is heated to 130 ℃;
(4) open valve, remove vacuum, add the activator tolylene diisocyanate, tolylene diisocyanate and monomeric mol ratio are 0.002-0.003: 1, mix;
(5) be cast to rapidly in the mould that has been preheated to 160-170 ℃, be incubated the demoulding after 5 minutes, be silicon carbide grain-filling cast composite nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00103503 CN1095480C (en) | 2000-03-24 | 2000-03-24 | Preparation of silicon carbide grain-filling cast composite nylon material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00103503 CN1095480C (en) | 2000-03-24 | 2000-03-24 | Preparation of silicon carbide grain-filling cast composite nylon material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1265402A CN1265402A (en) | 2000-09-06 |
| CN1095480C true CN1095480C (en) | 2002-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00103503 Expired - Fee Related CN1095480C (en) | 2000-03-24 | 2000-03-24 | Preparation of silicon carbide grain-filling cast composite nylon material |
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| CN (1) | CN1095480C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382295A (en) * | 2010-09-03 | 2012-03-21 | 谷荒 | High-intensity, wear-resistant and modified cast nylon floatation machine impeller and production method thereof |
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| CN102532871A (en) * | 2010-12-20 | 2012-07-04 | 谷荒 | Modified monomer casting nylon with high strength, high wear resistance, and impact resistance and production method thereof |
| CN102532524B (en) * | 2010-12-28 | 2015-05-13 | 合肥杰事杰新材料股份有限公司 | Nylon chopped fiber/cast nylon composite material and preparation method thereof |
| CN102863903A (en) * | 2012-10-16 | 2013-01-09 | 河南工业大学 | Monomer casting (MC) nylon polishing abrasive grain used in roller polishing machine and preparation method of MC nylon polishing abrasive grain |
| CN103012774B (en) * | 2012-11-22 | 2017-04-26 | 合肥杰事杰新材料股份有限公司 | High-temperature resistant and high-strength type casting nylon 6 composite material and preparation method thereof |
| CN103072097B (en) * | 2013-01-19 | 2016-07-06 | 河南工业大学 | The manufacture method of MC nylon glass polishing disk |
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| CN104277452A (en) * | 2013-07-02 | 2015-01-14 | 上海杰事杰新材料(集团)股份有限公司 | High-performance wear-resisting casting nylon nano composite material and preparation method thereof |
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| CN108055711A (en) * | 2017-12-23 | 2018-05-18 | 安徽国电能源设备工程有限公司 | A kind of preparation method of high intensity heat storage electric boiler heating element |
| CN110440998B (en) * | 2019-07-30 | 2021-10-29 | 核工业第八研究所 | Method for detecting leakage rate performance of silicon carbide composite circular tube |
-
2000
- 2000-03-24 CN CN 00103503 patent/CN1095480C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382295A (en) * | 2010-09-03 | 2012-03-21 | 谷荒 | High-intensity, wear-resistant and modified cast nylon floatation machine impeller and production method thereof |
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| CN1265402A (en) | 2000-09-06 |
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