A composite foaming insulating material and a preparing method thereof

A thermal insulation material and composite foaming technology, which is applied in the field of thermal insulation building materials and its preparation, can solve the problems of complex process and high cost, and achieve the effects of low thermal conductivity, low cost and alleviating tire pollution

Inactive Publication Date: 2016-05-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, polyurethane flexible foam is prepared...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Preparation of composite foam insulation material

[0019] (1) Weigh 90g of polyethylene glycol 4000 into a beaker, put it in an oil bath and heat it at 60°C until it melts, add 30g of rubber powder (60 mesh), 5g of polyethylene glycol 200, and 1g of surfactant dimethyl Silicone oil, stir evenly at constant temperature;

[0020] (2) Weigh 43g of 4,4'-diphenylmethane diisocyanate and dissolve it in 38g of dichloromethane, stir well, add to the mixing system in step (1), stir at a constant temperature for 25s, let the mixture freely foam and mature at 35°C 1h to obtain a composite foam insulation material.

[0021] The composite foam insulation material is measured according to GB / T6344-2008, and its tensile strength is

[0022] 134KPa. The thermal conductivity is 0.027W / (m K), and the bulk density is 63Kg / m 3 .

Embodiment 2

[0023] Embodiment 2: Preparation of composite foam insulation material

[0024] (1) Weigh 152g of polyethylene glycol 6000 into a beaker, put it in an oil bath and heat it at 75°C until it melts, add 40g of rubber powder (120 mesh), 8g of polyethylene glycol 400, and 1.2g of surfactant diethylene glycol Base silicone oil, stir evenly at constant temperature;

[0025] (2) Weigh 40g of 2,4'-diphenylmethane diisocyanate and dissolve it in 35g of n-pentane, stir well, add to the mixing system in step (1), stir at a constant temperature for 10s, let the mixture freely foam and mature at 28°C 30h to obtain a composite foam insulation material.

[0026] The composite foam insulation material is measured according to GB / T6344-2008, and its tensile strength is 142KPa. The thermal conductivity is 0.031W / (m K), and the bulk density is 66Kg / m 3 .

Embodiment 3

[0027] Embodiment 3: Preparation of composite foam insulation material

[0028] (1) Weigh 380g of polyethylene glycol 20000 into a beaker, put it in an oil bath and heat it at 95°C until it melts, add 200g of rubber powder (200 mesh), 105g of polyethylene glycol 600, and 4.5g of surfactant dimethyl Base silicone oil, stir evenly at constant temperature;

[0029] (2) Weigh 176g of 2,2'-diphenylmethane diisocyanate and dissolve it in 155g of cyclopentane, stir evenly, add to the mixing system in step (1), stir at a constant temperature for 15s, and let the mixture freely foam at 25°C, Aging for 48 hours to obtain a composite foam insulation material.

[0030] The composite foam insulation material is measured according to GB / T6344-2008, and its tensile strength is 125KPa. The thermal conductivity is 0.026W / (m K), and the bulk density is 68Kg / m 3 .

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Abstract

A composite foaming insulating material and a preparing method thereof are disclosed. The insulating material is prepared from following raw materials by weight: 90-380 parts of low-hydroxyl-value polyether polyol, 5-105 parts of high-hydroxyl-value polyether polyol, 1-5 parts of a surfactant, 20-200 parts of waste tyre rubber powder the particle size of which is 60-200 meshes, 40-176 parts of 4,4'-methylenebis(phenyl isocyanate) and 35-155 parts of a foaming agent. The insulating material is polyurethane flexible foam with good mechanical and insulating properties. Synthesis of the polyurethane flexible foam is free of catalysts, simple in method, easy to operate and low in cost. Experiments prove that the waste tyre rubber powder and a polyurethane material which are added are matched, a thermal insulating property of the polyurethane flexible foam is effectively enhanced, a heat conductivity coefficient of products is lower than 0.035 W/(m.K), and the volume density is less than 70 Kg/m3. The composite foaming insulating material is used for building walls and floors, and can play good roles of insulating and reducing noise.

Description

technical field [0001] The invention relates to a thermal insulation building material and a preparation method thereof, in particular to a composite foam thermal insulation material and a preparation method thereof. Background technique [0002] my country's energy is in short supply, and building energy consumption is an important part of energy consumption. According to relevant reports, about one-third of the heat in a building is transmitted to the outside through the outer wall. Therefore, it is of great significance to improve the thermal insulation performance of the wall, improve the quality of the indoor thermal environment and save heating energy consumption. [0003] Nowadays, polyurethane rigid foam is the most widely used material for building wall insulation, but there is no report about modified polyurethane flexible foam as wall insulation material. Polyurethane soft foam has the properties of air permeability, sound absorption, heat preservation, filtrati...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08L75/08C08L21/00C08J9/14
CPCC08G18/4808C08G18/4833C08J9/141C08J9/145C08J2375/08C08J2421/00C08L75/08C08L2203/14C08L21/00
Inventor 廖辉伟曾卓邓秋林郭文杰王少波武一兵李孟秋
Owner SOUTHWEAT UNIV OF SCI & TECH
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