Polymer modified expanded perlite and method for making same

A technology of expanded perlite and polymer, which is applied in the field of polymer-modified expanded perlite material and its preparation, which can solve the problems of crushing, increase of mortar bulk density, and decline of product quality, and achieve simple preparation process and solve the problem of product quality degradation , Ease of implementation and control

Inactive Publication Date: 2008-03-12
宁波荣山新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because expanded perlite is light and brittle, expanded perlite may be crushed due to extrusion and impact du

Method used

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  • Polymer modified expanded perlite and method for making same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Referring to Fig. 1, the expanded perlite with a particle size range of 2 mm is sent into the rotating drum, and the styrene-acrylic emulsion is micro-misted with hot air at 80° C. In the drum; the expanded perlite is in full contact with the hot mist of the styrene-acrylic emulsion in the drum, thereby forming a polymer film with a certain strength on the surface, and it is discharged from the discharge port, that is, the expanded perlite particles modified by the styrene-acrylic emulsion are obtained. .

[0021] Referring to Figure 2, ordinary expanded perlite reaches saturated water absorption in 30 minutes, while expanded perlite particles modified by styrene-acrylic emulsion reach saturated water absorption in 110 minutes, and the water absorption has been significantly reduced; at the same time, the strength has also been significantly improved , The volume loss rate dropped from the original 70% to 23% under the cylinder compressive strength of 1MPa, the problem ...

Embodiment 2

[0023] The expanded perlite with a particle size range of 8mm is sent into the rotating drum, and at the same time, the polyurethane micro-mist is sent into the rotating drum with hot air at 60 ° C. The quality of polyurethane: the quality of expanded perlite = 1: 3, and the expanded perlite is in the rotating drum. Fully contact with the hot mist formed by polyurethane, so that a polyurethane film with a certain strength is formed on the surface, and the material is discharged from the discharge port, that is, polyurethane modified expanded perlite particles are obtained.

[0024] Ordinary expanded perlite reaches saturated water absorption in 30 minutes, and the expanded perlite particles are modified by polyurethane, while the modified expanded perlite reaches saturated water absorption in 250 minutes, and the water absorption has been significantly reduced; at the same time, the strength has also increased. It has been significantly improved, and the volume loss rate has dr...

Embodiment 3

[0026] The expanded perlite with a particle size range of 4mm is sent into the rotating drum, and at the same time, the polyacrylic acid emulsion, the quality of the polyacrylic acid emulsion: the quality of expanded perlite = 1: 3, is sent into the rotating drum in the form of a spray by hot air at 90°C; The perlite is in full contact with the hot mist formed by the polyacrylic acid emulsion in the drum, so that a polyacrylic acid emulsion film with a certain strength is formed on the surface, and it is discharged from the discharge port, that is, the polyacrylic acid emulsion modified expanded perlite particles are obtained. .

[0027] Ordinary expanded perlite reaches saturated water absorption in 30 minutes, expanded perlite particles modified by polyurethane, and modified expanded perlite reaches saturated water absorption in 360 minutes, and the water absorption has been significantly reduced; at the same time, the strength has also increased It has been significantly im...

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Abstract

The present invention discloses a polymer modification expansion perlite and the preparation method. The polymer modification expansion perlite is a polymer modification expansion perlite particle used to carry out the surface coating modification by adopting the polymer modifiers. The preparation method is that the expansion perlite is delivered into a rotary drum, and the polymer modifiers are delivered into the rotary drum from the other inlet of the rotary drum in the form of sprayer together with the hot air, the temperature of which ranges from 30 to 150 Celsius system. A polymer film with a certain strength is formed on the surface of the expansion perlite, and the materials are outputted from a discharge hole so as to obtain the polymer modification expansion perlite particle. The present invention has the following advantages: the polymer modifiers completely coat the expansion perlite particle, thus lowering the water absorption and eliminating the defect that the expansion perlite easily absorbs the water with the thermal insulation performance lowered; the polymer film with a certain strength and toughness is formed on the surface of the expansion perlite, thus solving the problem that the expansion perlite is easy to be broken up with lowering the quality of the products in the process of transportation and use; the preparation technique is simple and is easy to be carried out and controlled, thus being beneficial to the industrialized popularization and application.

Description

technical field [0001] The invention relates to the field of building energy conservation, in particular to a polymer-modified expanded perlite material and a preparation method thereof. Background technique [0002] The energy consumption per unit building area in my country is three times that of developed countries with similar climate conditions, and 95% of buildings are high-energy buildings, and building energy consumption accounts for about 30% of the total energy consumption of the whole society. With the rapid growth of my country's economic construction and real estate industry, it will bring a greater power burden to China, which is short of resources and increasingly polluted. Therefore, building energy saving is an extremely important and urgent subject for our country, and the research and development of high performance building energy saving materials is of great significance. [0003] Thermal insulation mortar is a building energy-saving material with excel...

Claims

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Application Information

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IPC IPC(8): C04B20/10C04B14/18
CPCC04B20/1051C04B20/1037C04B20/1033
Inventor 王智宇王小山阮华施卫平
Owner 宁波荣山新型材料有限公司
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