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Low-viscosity and rapid-demolding rigid polyurethane composition and preparation method thereof

A rigid polyurethane and low-viscosity technology, which is applied in the field of refrigerator insulation materials, can solve the problems affecting the curing performance of polyurethane foam, high viscosity, corrosion of ABS and HIPS, etc., and achieve shortening of foaming and curing time, excellent rapid release performance, Excellent thermal insulation effect

Inactive Publication Date: 2013-03-13
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

[0003] At present, most refrigerator manufacturers use ABS (acrylonitrile-styrene-butadiene copolymer) and HIPS (polystyrene) inner tanks, but the rigid polyurethane composite material containing high cyclopentane foaming is not suitable for ABS. It is corrosive to HIPS, causing the inner liner to sag or melt to form small holes after the refrigerator has been used for a long time
[0004] In order to solve the corrosion problem of the refrigerator liner, it is necessary to reduce the amount of cyclopentane used, but the reduction in the amount of cyclopentane used will lead to an increase in the viscosity of the polyurethane composition, thereby affecting the foaming fluidity; but solving the problem of high viscosity will affect Polyurethane foam curing properties, resulting in reduced demoulding speed, thereby reducing production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A low-viscosity and quick-release rigid polyurethane composition is prepared by reacting and foaming the following components:

[0038] 1) 60 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)

[0039] 20 parts of polyether with o-toluenediamine as the initiator and 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)

[0040] 10 parts of polyether with glycerin as the initiator and ethylene oxide as the polymerizable monomer, 3 functionalities, the average molecular weight is about 1500 (polyether C)

[0041] 5 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)

[0042] 2 parts of po...

Embodiment 2

[0051] A low-viscosity and quick-release rigid polyurethane composition is prepared by reacting and foaming the following components:

[0052] 1) 55 parts of polyether A with sucrose as the starting agent,

[0053] 25 parts of polyether B with o-toluenediamine as the initiator,

[0054] 11 parts of polyether C with glycerin as the initiator,

[0055] 6 parts of composite polyether D with sucrose and glycerin as composite starter;

[0056] Dibasic alcohol is 1 part of polyether E of initiator;

[0057] 2 parts of polyether F (polyester polyol);

[0058] 2) 2.5 parts of composite catalyst, including 0.5 parts of bis(dimethylaminohexyl) ether (A-1), 1.5 parts of trihexylenediamine (TEDA-33P), 2,4,6-tris(dimethylamine 0.5 part of methyl) phenol (TMR-30);

[0059] 3) 12.5 parts of blowing agent cyclopentane;

[0060] 4) 2.5 parts of water;

[0061] 5) Foam stabilizer B-8462 (Degusa, Degusa) 3.0 parts;

[0062] 6) Isocyanate M-200 (Kumho), the isocyanate index is 112,144 parts...

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Abstract

The invention relates to a low-viscosity and rapid-demolding rigid polyurethane composition, which comprises the following components by weight part: 1) 30 to 60 parts of polyether taking sucrose as an initiator, 10 to 30 parts of polyether taking o-tolidine as an initiator, 3 to 20 parts of polyether taking glycerol as an initiator, 3 to 15 parts of composite polyether taking sucrose and glycerol as an initiator, 1 to 10 parts of polyether taking diol as an initiator, 100 parts of composite polyether formed by 1 to 5 parts of polyester polyol; 2) 1.0 to 3.0 parts of composite catalyst; 3) 10 to 15 parts of foaming agent cyclopentane; 4) 1.5 to 3.0 parts of water; 5) 1.0 to 3.5 parts of foam stabilizer; and 6) 130 to 150 parts of isocyanate with an index of 100 to 130. The rigid polyurethane composition prepared by the invention has the advantages that: the demolding time can reach 170 seconds, the viscosity is low, the fluidity is good, the thermal conductivity is low, the thermal insulation property is excellent, and the rigid polyurethane composition has better corrosion resistance to an HIPS (high impact polystyrene) liner of a refrigerator 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 advantage of excellent thermal insulation performance, so it is widely used in the thermal insulation layer of refrigerators. [0003] At present, most refrigerator manufacturers use ABS (acrylonitrile-styrene-butadiene copolymer) and HIPS (polystyrene) inner tanks, but the rigid polyurethane composite material containing high cyclopentane foaming is not suitable for ABS. And HIPS are corrosive, causing the inner liner to sag or melt to form sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/42C08G18/18C08G18/20C08L75/06C08L75/08C08J9/14
Inventor 金大映权在槿李光雨吴星海
Owner 可利亚多元醇(南京)有限公司
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