POlyurethane hard foam material

A technology of rigid foam and polyurethane, which is applied in the field of polyurethane rigid foam materials, can solve the problems of low resource utilization efficiency, insufficient utilization and value-added, and low price, and achieve the effects of improving competitiveness, less environmental pollution, and reducing costs

Inactive Publication Date: 2004-12-15
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bagasse, as a potential plant resource, is highly productive and renewable, but resource-inefficient
Taking my country as an example, in 1997 / 1998 (crushing season), the planting area of ​​sugarcane was 1.3 million hectares, the output was about 79 million tons, and about 19.75 million tons of bagasse were produced in the sugar making process. The price was extremely low, and most of them were burned. Leverage and add value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 100 parts of bagasse liquefaction and add 10 parts of magnesium oxide to neutralize excess acid, neutralize to PH=7, then add 5 parts of anhydrous sodium sulfate, stir evenly, leave overnight to remove water, put the dehydrated sugarcane The slag degradation liquid is centrifuged to remove solid matter. The centrifuged bagasse degradation liquid is formulated into AB components by the following formula by weight.

[0037] A component:

[0038] Bagasse degradation solution after treatment: 100 parts

[0039]Dibutyltin dilaurate, 0.075 parts

[0040] Alkylene oxide modified polydimethylsiloxane, 2 parts

[0041] Water: 2 parts

[0042] B component

[0043] Polymeric diphenylmethane diisocyanate, 326 parts.

[0044] Among them, dibutyltin dilaurate is an industrial product and can be purchased on the market. The organosilicon foam stabilizer oxyalkylene-modified polydimethylsiloxane is F-502 produced by Shin-Etsu Chemical Co., Ltd., which is available in the ma...

Embodiment 2

[0047] Take 100 parts of bagasse liquefaction and add 10 parts of magnesium oxide to neutralize excess acid, neutralize to PH=7, then add 5 parts of anhydrous sodium sulfate, stir evenly, leave overnight to remove water, put the dehydrated sugarcane The slag degradation liquid is centrifuged to remove solid matter. The centrifuged bagasse degradation liquid is formulated into AB components by the following formula by weight.

[0048] A component:

[0049] Bagasse degradation solution after treatment: 100 parts

[0050] Dibutyltin dilaurate: 0.12 parts

[0051] Polydimethylsiloxane (kinematic viscosity 25°C 1000mm / s): 3.18 parts

[0052] Water: 2 parts

[0053] B component

[0054] Polymerized diphenylmethane diisocyanate: 161 parts.

[0055] See Example 1 for the raw materials used and the foaming process.

[0056] The polyurethane rigid foam density that makes is 283kg / m 3 .

Embodiment 3

[0058] Take 100 parts of bagasse liquefaction and add 10 parts of magnesium oxide to neutralize excess acid, neutralize to PH=7, then add 5 parts of anhydrous sodium sulfate, stir evenly, leave overnight to remove water, put the dehydrated sugarcane The slag degradation liquid is centrifuged to remove solid matter. The centrifuged bagasse degradation liquid is formulated into AB components by the following formula by weight.

[0059] A component:

[0060] Bagasse degradation solution after treatment: 100 parts

[0061] Dibutyltin dilaurate: 0.126 parts

[0062] Oxygenated polydimethylsiloxane: 2.06 parts

[0063] Dichloromethane: 6 parts

[0064] B component

[0065] Polymerized diphenylmethane diisocyanate: 326 parts.

[0066] See Example 1 for the raw materials used and the foaming process.

[0067] The polyurethane rigid foam density that makes is 55.9kg / m 3 , The compressive strength is 174kPa.

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Abstract

The present invention relates to a kind of hard foamed polyurethane material prepared with bagasse degrading liquid to replace polyol polymer and through foaming. The material consists of component A including bagasse degrading liquid 100 (in weight portions, the same below), catalyst 0.01-0.5, foam stabilizer 0.5-5 and foaming agent 0.1-10; and component B of isocyanate 50-400. The two components are mixed via stirring and foamed. The present invention utilizes plant waste resource, has obvious cost superiority and finds one way for utilizing bagasse, and the product has high performance indexes.

Description

technical field [0001] The invention relates to a polyurethane rigid foam material prepared from bagasse. technical background [0002] Polyurethane rigid foams are a broad and mass-applied class of foams. It has the advantages of low density, high strength, good sound insulation effect, and high specific strength. More importantly, its thermal conductivity is extremely low, which is the best type of material synthesized by humans in the world. It is easy to construct and is widely used in refrigerators, freezers, cold storage walls, chemical pipeline heat insulation, etc. In 1999, the polyurethane rigid foam materials used in the world's construction industry exceeded 1 million tons. [0003] The most important raw materials for the preparation of polyurethane rigid foams are polymeric polyols and isocyanates. The polymeric polyols used in the traditional method to prepare polyurethane rigid foam materials are polymerized from small organic molecules, which belong to sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/24C08G18/28
Inventor 庞浩柳雨生廖兵张松伟谌凡更
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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