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Method for preparing alkylated ultrafine talcum powder oil-filled elastomer

A technology of ultra-fine talc powder and oil-extended elastomer, which is applied in the field of powder modified material preparation, can solve the problems such as difficulty in controlling the degree of adhesion, improve affinity and adsorption, avoid invalid accumulation, promote interface renewal and The effect of contact

Active Publication Date: 2018-12-18
NINGBO HENGTUO POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by the particle size of talc powder and the effect of liquid-solid infiltration, the degree of adhesion is usually difficult to control, and it is difficult to fully and uniformly attach the activator to the surface of talc powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Add ultrafine talc powder with a particle size of 6.5 μm into a closed pressure reactor, heat for 45 minutes under ultrasonic and vacuum conditions, ultrasonic power 100W, vacuum degree 25kPa, heating temperature 120°C;

[0024] 2) Turn off the vacuum, inject methylsilanol vapor, keep the pressure at 0.4MPa, heat for 10min under ultrasonic and stirring conditions, ultrasonic power 100W, stirring speed 150rpm, heating temperature 120°C;

[0025] 3) Stop the introduction of methyl silanol vapor, maintain ultrasound and stirring, and continue heating for 10 minutes;

[0026] 4) Stop heating and stirring, maintain ultrasonic conditions, and vacuum for 20 minutes, with a vacuum degree of 25kPa;

[0027] 5) Turn off stirring and ultrasonic, discharge after cooling, and make alkylated superfine talcum powder;

[0028] 6) Alkylated superfine talc powder, SBS and liquid paraffin at a mass ratio of 80:20:30 were mixed with oil-extended oil for 20 minutes at high speed, melted...

Embodiment 2

[0030] 1) Add ultrafine talc powder with a particle size of 6.5 μm into a closed pressure reactor, heat for 45 minutes under ultrasonic and vacuum conditions, ultrasonic power 200W, vacuum degree 25kPa, heating temperature 130°C;

[0031] 2) Turn off the vacuum, inject methylsilanol vapor, keep the pressure at 0.6MPa, heat for 15min under ultrasonic and stirring conditions, ultrasonic power 200W, stirring speed 300rpm, heating temperature 130°C;

[0032] 3) Stop the injection of methyl silanol vapor, maintain ultrasound and stirring, and continue heating for 15 minutes;

[0033] 4) Stop heating and stirring, maintain ultrasonic conditions, and vacuum for 20 minutes, with a vacuum degree of 25kPa;

[0034] 5) Turn off the stirring and ultrasonic, and discharge the material after cooling to prepare the alkylated superfine talc powder.

[0035] 6) Alkylated ultra-fine talc powder, SBS and liquid paraffin with a mass ratio of 80:20:40 were mixed and oil-extended at high speed for...

Embodiment 3

[0037] 1) Add ultrafine talc powder with a particle size of 6.5 μm into a closed pressure reactor, heat for 60 minutes under ultrasonic and vacuum conditions, ultrasonic power 100W, vacuum degree 20kPa, heating temperature 130°C;

[0038] 2) Turn off the vacuum, inject trimethylsilanol vapor, keep the pressure at 0.6MPa, heat for 15min under ultrasonic and stirring conditions, ultrasonic power 200W, stirring speed 300rpm, heating temperature 130°C;

[0039] 3) Stop feeding trimethylsilanol vapor, maintain ultrasound and stirring, and continue heating for 15 minutes;

[0040] 4) Stop heating and stirring, maintain ultrasonic conditions, and vacuum for 20 minutes, with a vacuum degree of 20kPa;

[0041] 5) Turn off the stirring and ultrasonic, and discharge the material after cooling to prepare the alkylated superfine talc powder.

[0042] 6) Alkylated ultra-fine talc powder, SEBS and liquid paraffin in a mass ratio of 80:20:50 were mixed with oil-extended oil at high speed for...

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Abstract

The invention belongs to the field of preparation of powder modified materials, and concretely relates to a method for preparing an alkylated ultrafine talcum powder oil-filled elastomer. The method comprises the following steps: carrying out alkylation modification on the surface of ultrafine talcum powder by using vapor phase alkylsilanol, mixing the alkyl modified powder with a styrene based elastomer and liquid paraffin, filling the obtained mixture with oil, and carrying out melting mixing granulation to prepare the alkylated ultrafine talcum powder oil-filled elastomer. The oil-filled elastomer prepared from the alkylated ultrafine talcum powder has the advantages of high powder content, high oil filling rate and no oil precipitation risk, and is an elastomer material with an extremely high cost performance.

Description

technical field [0001] The invention belongs to the field of preparation of powder modified materials, and in particular relates to a method for preparing an alkylated superfine talcum powder oil-extended elastomer. Background technique [0002] Talc powder is cheap and is often used as a polymer filler. Its main component is magnesium silicate, which has strong polarity and hygroscopicity, which greatly affects its interface strength with non-polar media. In the preparation of oil-extended elastomers, the proportion of talc powder and oil in the elastomer is relatively large, often due to the poor affinity between the powder and the oil, the oil seeps out, resulting in the hardening of the elastomer and the decline in performance, so the lipophilic modification of talc powder Sex is very necessary. In the prior art, activating substances such as silane are generally attached to the surface of talc powder by means of liquid-solid mixing to improve the affinity between talc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L53/02C08K9/06C08K3/34
CPCC08L91/06C08L53/02C08L53/025C08K9/06C08K3/34
Inventor 李春松
Owner NINGBO HENGTUO POLYMER MATERIAL