Check patentability & draft patents in minutes with Patsnap Eureka AI!

Hydrophobic expanded perlite and preparation method thereof

A technology for expanding perlite and perlite, which is applied in the field of flame retardant materials and heat preservation, can solve the problems that the water repellent cannot be uniformly dispersed and the amount of the water repellant is large, and achieve excellent waterproof effect, reduce production cost and uniform waterproof effect. Effect

Inactive Publication Date: 2014-12-10
SOUTHWEST UNIVERSITY
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that the existing method for preparing hydrophobic expanded perlite is simply to mix the water-repellent agent with the expanded perlite, the amount of the water-repellent agent is relatively large, and the water-repellent agent cannot be uniformly dispersed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrophobic expanded perlite and preparation method thereof
  • Hydrophobic expanded perlite and preparation method thereof
  • Hydrophobic expanded perlite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment prepares the method for hydrophobic expanded perlite, comprises the following steps:

[0031] 1), take perlite ore and silane coupling agent and fully stir and mix at room temperature;

[0032] 2) Put the mixed material at 400°C for 15-20min to dry;

[0033] 3) Put the dried material at 1100°C and roast for 3s to obtain the product.

[0034] In this example:

[0035] Step 1) The particle size of the obtained perlite ore is 20-30 mesh; the obtained silane coupling agent is vinyltriethoxysilane; the mass ratio of the perlite ore and the silane coupling agent is 1000:3;

[0036] Step 2) the moisture content of the mixed material after drying is ≤2%;

[0037] The hydrophobicity of the hydrophobic expanded perlite obtained in the present embodiment is 97%, and the bulk density is 112Kg / m 3 , The operating temperature range is -190~830℃.

Embodiment 2

[0039] The present embodiment prepares the method for hydrophobic expanded perlite, comprises the following steps:

[0040] 1), take perlite ore and silane coupling agent and fully stir and mix at room temperature;

[0041] 2) Put the mixed material at 400°C for 15-20min to dry;

[0042] 3) Put the dried material at 1100°C and roast for 3s to obtain the product.

[0043] In this example:

[0044] Step 1) The particle size of the obtained perlite ore is 20-30 mesh; the obtained silane coupling agent is octyltriethoxysilane; the mass ratio of the perlite ore and the silane coupling agent is 1000:3;

[0045] Step 2) the moisture content of the mixed material after drying is ≤2%;

[0046] The hydrophobicity of the hydrophobic expanded perlite obtained in the present embodiment is 98%, and the bulk density is 118Kg / m 3 , The operating temperature range is -180~810℃.

Embodiment 3

[0048] The present embodiment prepares the method for hydrophobic expanded perlite, comprises the following steps:

[0049] 1), take perlite ore and silane coupling agent and fully stir and mix at room temperature;

[0050] 2) Put the mixed material at 400°C for 15-20min to dry;

[0051] 3) Put the dried material at 1100°C and roast for 3s to obtain the product.

[0052] In this example:

[0053] Step 1) The particle size of the obtained perlite ore is 50-60 mesh; the obtained silane coupling agent is vinyltriethoxysilane; the mass ratio of the perlite ore and the silane coupling agent is 1000:3;

[0054] Step 2) the moisture content of the mixed material after drying is ≤2%;

[0055] The hydrophobicity of the hydrophobic expanded perlite obtained in the present embodiment is 98%, and the bulk density is 126Kg / m 3 , The operating temperature range is -170~830℃.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing hydrophobic expanded perlite. The method comprises the steps of firstly mixing perlite ore and a silane coupling agent at the room temperature, then drying the mixture under 400-500 DEG C, and finally roasting the dried material at 1000-1300 DEG C to obtain the product, wherein the particle size of the perlite ore is less than or equal to 60 meshes, and the mass ratio of the perlite ore to the silane coupling agent is (1000:1)-(1000:5). According to the method for preparing hydrophobic expanded perlite, the hydrophobic expanded perlite is obtained by the steps of directly mixing the perlite ore and the silane coupling agent, and then carrying out medium temperature baking and high temperature roasting, the production technology and equipment are simple, and the production cost is greatly reduced; the hydrophobic rate of the expanded perlite produced according to the method disclosed by the invention is greater than or equal to 90 percent, and the expanded perlite has a uniform and excellent waterproof effect under the condition of no any hydrophobic agents, and can be used for producing heat insulation layers of building energy-saving plates and oil (gas) pipelines.

Description

technical field [0001] The invention belongs to the field of thermal insulation and flame-retardant materials, and relates to perlite products, in particular to a method for preparing hydrophobic expanded perlite and its products. Background technique [0002] Expanded perlite is a porous, white granular material made of natural perlite ore, which is crushed, screened, and calcined at high temperature. 3 ), low thermal conductivity (0.05~0.15kcal / m h ℃), wide temperature range (-200~800℃), good chemical stability (pH=7), non-toxic, tasteless, non-combustible, sound-absorbing, non-corrosive And other advantages, has been widely used in new construction, furniture decoration, petrochemical, high-grade coatings and other industries. [0003] However, the existing expanded perlite has the problem of easy water absorption, and its mass water absorption rate is usually as high as 500% to 800%, which makes expanded perlite products absorb a large amount of water during constructio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B20/06
Inventor 陈久存李文君刘茵沁李长明
Owner SOUTHWEST UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com