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Hard polyurethane composition with low thermal conductivity and rapid demoulding property as well as its preparation method

A rigid polyurethane, low thermal conductivity technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problem of unspecified polyether demolding time, etc., and achieve excellent rapid demoulding performance, thermal conductivity, etc. The effect of low coefficient and excellent thermal insulation performance

Inactive Publication Date: 2012-05-02
可利亚多元醇(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rigid polyurethane foam composition is based on the HCFC-141b foaming system, the release performance is only improved, and the release time of the polyether is not specified in its specification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A rigid polyurethane composition with low thermal conductivity and fast demoulding, which is prepared by reacting and foaming the following components:

[0039] 1) 50 parts of polyether with sucrose as the initiator and ethylene oxide as the polymerization monomer, 3 functionalities, and the average molecular weight is about 800 (polyether A)

[0040] 30 parts of polyether with o-toluenediamine as the initiator, ethylene oxide and propylene oxide at a weight ratio of 1:3 as polymerized monomers, 4 functionalities, and the average molecular weight is about 550 (polyether B)

[0041] 8 parts of polyether with glycerin as the initiator and ethylene oxide as the monomer, 3 functionalities, the average molecular weight is about 1500 (polyether C)

[0042] 12 parts of composite polyether with sucrose and glycerin as the composite starter and ethylene oxide as the polymerization monomer; 3 functionalities, the average molecular weight is about 700 (polyether D)

[0043] 2) 2....

Embodiment 2

[0051] A rigid polyurethane composition with low thermal conductivity and fast demoulding, which is prepared by reacting and foaming the following components:

[0052] 1) 40 parts of polyether A with sucrose as the starting agent,

[0053] 40 parts of polyether B with o-toluenediamine as the initiator,

[0054] 10 parts of polyether C with glycerin as the initiator,

[0055] 10 parts of composite polyether D with sucrose and glycerin as composite starter;

[0056] 2) 2.5 parts of composite catalyst, including 0.3 parts of bis(dimethylaminohexyl) ether (A-1), 1.5 parts of trihexylenediamine (TEDA-33P), 2,4,6-tris(dimethylamine 0.7 parts of methyl) phenol (TMR-30);

[0057] 3) 16.5 parts of blowing agent cyclopentane;

[0058] 4) 2.0 parts of water;

[0059] 5) Foam stabilizer B-8462 (Degusa, Degusa) 2.0 parts;

[0060] 6) Isocyanate M-200 (Kumho), the isocyanate index is 112, 143 parts.

[0061] The performance indexes of the above-mentioned rigid polyurethane compositio...

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Abstract

The invention relates to a hard polyurethane composition with low thermal conductivity and rapid demoulding property. The composition comprises: 1) 100 parts of composite polyethers composed of 40-70 parts of polyethers with cane sugar as a starting agent, 10-50 parts of polyethers with ortho toluenediamine as a starting agent, 3-20 parts of polyethers with glycerin as a starting agent, and 3-20 parts of composite polyethers with a composite starting agent composed of cane sugar and glycerin; 2) 1.0-3.0 parts of a composite catalyst; 3) 10-20 parts of a foaming agent cyclopentane; 4) 1.5-3.0 parts of water; 5) 1.0-3.5 parts of a foam stabilizer; and 6) 130-150 parts of isocyanate with an index of 100-130. The hard polyurethane composition of the invention has demoulding time short to 170 seconds, low thermal conductivity and excellent thermal insulation performance, and can meet the demands for energy saving, environmental protection and production efficiency improvement when used in refrigerator production.

Description

technical field [0001] The invention relates to a refrigerator insulation material, in particular to a rigid polyurethane composition and a preparation method thereof. The foam composition has excellent mold release performance, does not destroy the atmospheric ozone layer, and is a green and environment-friendly rigid polyurethane foam material. Background technique [0002] Rigid polyurethane foam is prepared by the interaction of -OH and -NCO in the presence and action of catalysts, foaming agents, and foam stabilizers. It has the characteristics of excellent thermal insulation performance, so it is widely used in the thermal insulation layer of refrigerators, freezers, cold storage panels, sandwich panels, thermal insulation pipes, refrigerated containers, etc. [0003] However, with the prohibition of the use of Freon and the restriction of the use of hydrochlorofluorocarbons (HCFCs) blowing agents, blowing agents with zero ODP (Ozone Depression Potential, atmospheric o...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08J9/14C08G101/00
CPCY02P20/10
Inventor 金大映权在槿李光雨
Owner 可利亚多元醇(南京)有限公司
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