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Surface-modified polyurethane foam particles and their modification method and use

A technology of polyurethane foam and surface modification, applied in the field of building energy-saving thermal insulation materials, can solve the problems of uneven surface of foam particles, low water absorption rate of polyurethane foam, large specific surface area, etc. the effect of sex

Inactive Publication Date: 2014-10-08
HUNAN VARY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discarding of this material not only causes serious environmental pollution, but also wastes resources.
[0005] However, the water absorption rate of polyurethane foam itself is extremely low, and the surface of the broken foam particles is uneven, and the specific surface area is large, so it cannot be directly used as thermal insulation material in thermal insulation mortar.

Method used

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  • Surface-modified polyurethane foam particles and their modification method and use
  • Surface-modified polyurethane foam particles and their modification method and use
  • Surface-modified polyurethane foam particles and their modification method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of surface modifier binder for polyurethane foam particles: Dissolve magnesium chloride in water to make a density of 1200Kg / M 3 The aqueous solution obtains polyurethane foam particle surface modifier binding agent A agent.

[0024] (2) Surface modification of polyurethane foam particles: mix with each other according to the weight ratio of foam particles and magnesium oxide at a ratio of 1:1; turn on the mixer to keep the materials in a state of rapid stirring (stirring speed can be 100-180 rpm), stir and mix 5-10 minutes ensure complete mixing of the two components. Keep the material in a stirring state, and slowly spray the polyurethane foam particle surface modifier binder A (the amount of A agent is the same as the weight of magnesium oxide) on the granular material. After spraying, continue to stir for 10 minutes, stop stirring, discharge the mixed material from the mixer, and place it for 12-48 hours to obtain a modified polyurethane foam block....

Embodiment 2

[0028] (1) Preparation of surface modifier binder: dissolve magnesium chloride in water to make a density of 1100Kg / M 3 The aqueous solution obtains polyurethane foam particle surface modifier binding agent A agent.

[0029] (2) Surface modification of polyurethane foam particles: mix with each other according to the weight ratio of foam particles and magnesium oxide 1:0.5; turn on the mixer to keep the materials in a state of rapid stirring (stirring speed can be 100-180 rpm), stir and mix 5-10 minutes ensure complete mixing of the two components. Keep the material in a stirring state, and slowly spray the polyurethane foam particle surface modifier A agent (the ratio of agent A to magnesium oxide is 1:0.8) on the granular material. After spraying, continue to stir for 10 minutes, stop stirring, discharge the mixed material from the mixer, and place it for 12-48 hours to obtain a modified polyurethane foam block. The modified polyurethane foam blocks were crushed using a ro...

Embodiment 3

[0033] (1) Preparation of surface modifier binder: Dissolve magnesium chloride in water to make a density of 1300Kg / M 3 The aqueous solution obtains polyurethane foam particle surface modifier binding agent A agent.

[0034] (2) Surface modification of polyurethane foam particles: mix with each other according to the weight ratio of foam particles and magnesium oxide 1:1.5; turn on the mixer to keep the materials in a state of rapid stirring (stirring speed can be 100-180 rpm), stir and mix 5-10 minutes ensure complete mixing of the two components. Keep the material in a stirring state, and slowly spray the polyurethane foam particle surface modifier A agent (the amount of agent A is 1:1.2 to the amount of magnesium oxide) on the granular material. After spraying, continue to stir for 10 minutes, stop stirring, discharge the mixed material from the mixer, and place it for 12-48 hours to obtain a modified polyurethane foam block. The modified polyurethane foam blocks were cru...

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Abstract

The invention relates to a building energy-saving thermal-insulation material and especially relates to surface-modified polyurethane foam particles and their modification method and use. The surface-modified polyurethane foam particle comprises a base layer and a coating layer. The base layer is a polyurethane foam particle and the coating layer coats the outer surface of the polyurethane foam particle and is a magnesite gel material layer. The surface-modified polyurethane foam particles can be used as heat insulation materials. In mortar preparation and usage, through use of the surface-modified polyurethane foam particles, moisture loss, cracking and shedding are avoided and mortar manufacturability and strength are guaranteed.

Description

technical field [0001] The invention relates to building energy-saving and thermal insulation materials, in particular to a surface-modified polyurethane foam particle and a modification method and application thereof. Background technique [0002] Building energy-saving thermal insulation materials are an important part of building materials, and their properties are functional materials in building materials. The main purpose of building energy-saving thermal insulation materials for buildings and structures is to save energy. In recent years, with the continuous advancement of my country's building energy conservation work, especially in 2005, the Ministry of Construction issued mandatory standards, requiring that all civil buildings must be properly insulated since 2006. Therefore, building thermal insulation and energy saving has become a national mandatory requirement. Building wall insulation technology has three forms: external wall internal insulation, sandwich ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B16/08C04B28/00
Inventor 明果英张长安周军
Owner HUNAN VARY TECH
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