Polyurethane foam with good thermal insulation property and preparation method thereof

A technology of polyurethane foam and thermal insulation, applied in the field of foam, can solve the problems of unsatisfactory thermal insulation, poor sound absorption and damping performance, poor water resistance, etc., achieve excellent anti-vibration performance, excellent elasticity, and expand the use range

Active Publication Date: 2019-11-01
JIANGSU DAMAONIU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in daily use, as people's requirements are getting higher and higher, they hope to obtain polyurethane materials that can adapt to various harsh environmental conditions. Now polyurethane materials have defects such as thermal insulation that cannot meet current requirements, poor strength, and easy cracking. Defects such as yellowing, poor air permeability, poor heat resistance, poor water resistance, and poor sound absorption and damping performance

Method used

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  • Polyurethane foam with good thermal insulation property and preparation method thereof
  • Polyurethane foam with good thermal insulation property and preparation method thereof

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preparation example Construction

[0027] In one embodiment, the preparation method of the soybean oil polyol comprises the following steps:

[0028] (1) Add soybean oil and maleic anhydride into a four-necked flask, heat up to 190-210°C, and react for 2-3 hours to obtain the intermediate maleic anhydride-modified soybean oil;

[0029] (2) Add maleic anhydride-modified soybean oil, diethylene glycol and KOH into a four-neck flask, heat up to 190-220°C, and react for 5-6 hours to obtain crude soybean oil polyol;

[0030] (3) Add crude soybean oil polyol in a four-neck flask, remove unreacted diethylene glycol through repeated washing and liquid separation; add 3wt% water, and phosphoric acid with a mass concentration of 98% to neutralize KOH, 0.3wt % magnesium silicate adsorbent, water is removed by vacuum distillation, and adsorbent and potassium salt are removed by suction filtration.

[0031] Preferably, the maleic anhydride accounts for 0.25-0.4 wt% of the soybean oil; more preferably, the maleic anhydride ...

Embodiment 1

[0087] Embodiment 1 of the present invention provides a polyurethane foam with good thermal insulation. In parts by weight, the preparation raw materials of the polyurethane foam include 60 parts of polyester polyol, 15 parts of polyether polyol, 15 parts of airgel, 5 parts of Parts of blowing agent, 0.5 parts of foam stabilizer, 0.5 parts of catalyst, 0.75 parts of water, 65 parts of polyisocyanate, 2.5 parts of flame retardant.

[0088] The polyester polyol is a vegetable oil polyol; the vegetable oil polyol is a soybean oil polyol; the polyether polyol is purchased from Guangzhou Yinghong Chemical Co., Ltd., and the model is Puranol D204; the airgel includes two Silica airgel and amino-modified alumina / silica airgel; the weight ratio of the silica airgel and amino-modified alumina / silica airgel is 3:1; The blowing agent is 1,1,1,4,4,4-hexafluorobutene; the foam stabilizer is silicone oil; the catalyst includes triethanolamine and T-9; the triethanolamine and T-9 The weight...

Embodiment 2

[0100] Embodiment 2 of the present invention provides a kind of polyurethane foam with good thermal insulation, and by weight, the preparation raw material of described polyurethane foam comprises 60 parts of polyester polyols, 35 parts of polyether polyols, 10 parts of airgel, 10 parts of 1 part blowing agent, 2 parts foam stabilizer, 1 part catalyst, 1.6 parts water, 75 parts polyisocyanate; 5 parts flame retardant.

[0101] The polyester polyol is a vegetable oil polyol; the vegetable oil polyol is a soybean oil polyol; the polyether polyol is purchased from Guangzhou Yinghong Chemical Co., Ltd., and the model is Puranol G307; the airgel includes two Silica airgel and amino-modified alumina / silica airgel; the weight ratio of the silica airgel and amino-modified alumina / silica airgel is 6:1; The blowing agent is 1,1,1,4,4,4-hexafluorobutene; the foam stabilizer is silicone oil; the catalyst includes triethanolamine and T-9; the triethanolamine and T-9 The weight ratio is 3:...

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Abstract

The invention relates to the field of foam, in particular to polyurethane foam with good heat preservation performance and a preparation method of the polyurethane foam. The invention firstly providesthe polyurethane foam with good thermal insulation property. The polyurethane foam is prepared from the following raw materials in parts by weight: 30-70 parts of polyester polyol, 15-35 parts of polyether polyol, 10-25 parts of aerogel, 5-10 parts of a foaming agent, 0.5-2 parts of a foam stabilizer, 0.5-1 part of a catalyst, 0.75-1.6 parts of water and 65-75 parts of polyisocyanate; wherein theaerogel comprises silicon dioxide aerogel and aluminum oxide / silicon dioxide aerogel. The raw material part of the polyurethane foam provided by the invention adopts renewable resources, so that thepolyurethane foam is safe and environment-friendly. The polyurethane foam has excellent elasticity, heat insulation performance, heat resistance, water resistance and mechanical strength, has sound absorption and damping effects, has excellent vibration resistance, can be used under various environmental conditions, and widens the application range.

Description

technical field [0001] The invention relates to the field of foams, more specifically, the invention relates to a polyurethane foam with good thermal insulation and a preparation method thereof. Background technique [0002] Polyurethane foam is a high molecular polymer made of isocyanate and polyol as the main raw materials, mixed by special equipment under the action of various additives such as foaming agent, catalyst, and flame retardant, and foamed on-site by high-pressure spraying. Polyurethane foam has low cost, excellent mechanical properties, electrical properties, and chemical resistance, and is widely used in refrigerators, freezers, cold storage panels, sandwich panels, pipes, construction and other materials. [0003] However, in daily use, as people's requirements are getting higher and higher, they hope to obtain polyurethane materials that can adapt to various harsh environmental conditions. Now polyurethane materials have defects such as thermal insulation t...

Claims

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Application Information

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IPC IPC(8): C08G18/40C08G18/42C08G18/48C08J9/08C08J9/14C08K7/24C08K7/26C08K9/04C08G101/00
CPCC08G18/4018C08G18/4288C08G18/4837C08J9/08C08J9/147C08J2203/02C08J2203/162C08J2203/184C08J2375/04C08K7/24C08K7/26C08K9/04
Inventor 李金娣
Owner JIANGSU DAMAONIU NEW MATERIAL TECH CO LTD
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