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Catalytic complex for preparing isocyanurate foam from bagasse ployol

A polyurethane foam and polyol technology, applied in the field of catalytic composites, can solve problems such as differences in the structure of additives, restrictions on the adjustment of formulas, and difficulty in mixing to achieve uniformity.

Inactive Publication Date: 2005-11-23
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

[0007] In addition, we have found in actual work that there are two disadvantages in adding catalysts and foam stabilizers to the reaction system using the previous method: one is inaccurate weighing, because the amount of catalyst and foam stabilizer is relatively small. Errors are prone to occur during weighing, which also limits the adjustment of the formula; the second is that it is difficult to mix evenly. The more uniformly the catalyst and foam stabilizer are mixed with the bagasse polyol during the reaction, the more beneficial the reaction is, but due to the amount of less, combined with the complex composition of bagasse polyols, and the structural differences with additives, it is not easy to mix uniformly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 100g of ethylene glycol, 1g of triethylenediamine, 6g of dibutyltin dilaurate and 50g of F-502 into a glass container, stir magnetically for 5-10min, seal it up, and put it in a desiccator for later use.

[0018] Take 2.8g of the prepared catalytic compound, stir for 2-5min, add 100g of bagasse polyol, stir evenly, add 300g of polymerized diphenylmethane diisocyanate, stir for 30 seconds on a high-speed mixer at 2000 rpm, pour into Free foaming in the mold. Curing at room temperature, mold temperature 25°C. The prepared foam density is 59kg m -3 , The compressive strength is 470KPa.

Embodiment 2

[0020] Add 100g of polyethylene glycol 400, 5g of stannous octoate and 60g of AK-8805 into a glass container, stir magnetically for 5-10min, seal it up, and put it in a desiccator for later use.

[0021] Take 3.10 g of the prepared catalytic compound, stir for 2-5 minutes, add 100 g of bagasse polyol, 6 g of water, stir evenly, and add 224 g of polymerized diphenylmethane diisocyanate. Blend on a high-speed mixer at 2000 rpm for 20 seconds, pour into molds and foam freely. Curing at room temperature, mold temperature 35°C. The prepared foam density is 34kg m -3 , The compressive strength is 220KPa.

Embodiment 3

[0023] Add 100g of polyethylene glycol 400, 15g of triethylenediamine, 10g of stannous octoate and 30g of AK-8805 into a glass container, stir magnetically for 5-10min, seal it well, and put it in a desiccator for later use.

[0024]Take 3.5g of the prepared catalytic compound, stir for 2-5min, add 100g of bagasse polyol, 1.5g of water, stir evenly, add 160g of polymerized diphenylmethane diisocyanate. Blend on a high-speed mixer at 2000 rpm for 15 seconds, pour into molds and foam freely. After curing in an oven at 80°C for 20 minutes, place it at room temperature for curing, and the mold temperature is 40°C. The prepared foam density is 30kg·m -3 , Compression strength 200KPa.

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Abstract

The invention relates to a catalytic complex for preparing isocyanurate foam from bagasse ployol comprising the constituents (by mass ratio) of solvent 100 parts, foaming catalyst 0-20 parts, chain growth catalyst 1-15 parts and foam stabilizer 15-60 parts. The catalytic compound is suitable for the water foaming system of cane trash polyhydric alcohols, the reaction speed can be regulated well.

Description

technical field [0001] The invention relates to a catalytic composite, in particular to a catalytic composite for preparing polyurethane foam from bagasse polyol. Background technique [0002] There are three main types of reactions in the synthesis of polyurethane foams, namely, chain growth reactions, cross-chain reactions, and gas generation reactions. The molecular chains generated by the chain growth reaction form a polymer with a network structure through the cross-chain reaction, which becomes the meridians and skeleton of the foam, while the cells generated by the foaming reaction are distributed among them. If the three types of reactions are coordinated, the foam can be formed. The body provides good elasticity, strength and density, otherwise, the foam will be hollow or even collapsed. In the absence of a catalyst, the chain growth reaction and the foaming reaction are dominant in the foaming process, and the speed of the cross-chain reaction is quite different f...

Claims

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Application Information

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IPC IPC(8): C08G18/32
Inventor 廖兵柳雨生庞浩赵树录林果张先文
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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