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Refrigerator rigid polyurethane foam foaming formula and preparation method thereof

A technology for rigid polyurethane foam and refrigerator, applied in the field of polyurethane materials, can solve the problems of insufficient distribution of polyurethane foam, insufficient flow of polyurethane raw materials, affecting the thermal insulation performance of refrigerators, etc. stable effect

Inactive Publication Date: 2018-11-23
CHANGHONG MEILING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the foaming process of the refrigerator, the flow channel of the polyurethane raw material is narrow and the resistance of the flow channel increases, resulting in insufficient flow of the polyurethane raw material in the refrigerator, resulting in insufficient distribution of the polyurethane foam, and the phenomenon of poor filling is increasing, which affects the overall insulation performance of the refrigerator

Method used

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  • Refrigerator rigid polyurethane foam foaming formula and preparation method thereof
  • Refrigerator rigid polyurethane foam foaming formula and preparation method thereof
  • Refrigerator rigid polyurethane foam foaming formula and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of each raw material of the polyurethane foaming system of this embodiment by mass is:

[0028] 100 parts of pure white material;

[0029] 13 parts of foaming agent cyclopentane;

[0030] Polymerized MDI 136 parts.

[0031] Wherein the mass fraction of each component of the pure white material is:

[0032]

[0033]

[0034] Described polyether polyol A is the polyether polyol with sorbitol as initiator;

[0035] Described polyether polyol B is the polyether polyol with sucrose and mannitol as initiator;

[0036] The polyether polyol C is an amino polyether polyol with formaldehyde, diethanol and phenol as initiators obtained through the Mann reaction.

[0037] The preparation method comprises the steps of:

[0038] Step 1. Weigh polyether polyol A, polyether polyol B, polyether polyol C, catalyst and surfactant according to the formula and physically mix them into a pure white material;

[0039] Step 2. Mix pure white material and physical bl...

Embodiment 2

[0044] The composition of each raw material of the polyurethane foaming system of this embodiment by mass is:

[0045] 100 parts of pure white material;

[0046] 13 parts of foaming agent cyclopentane;

[0047] Polymerized MDI 136 parts.

[0048] Wherein the mass fraction of each component of the pure white material is:

[0049]

[0050] Described polyether polyol A is the polyether polyol with sorbitol as initiator;

[0051] Described polyether polyol B is the polyether polyol with sucrose and mannitol as initiator;

[0052] The polyether polyol C is an amino polyether polyol with formaldehyde, diethanol and phenol as initiators obtained through the Mann reaction.

[0053] Utilizing the polyurethane foaming system of this embodiment, the method for manufacturing the heat-insulating rigid polyurethane foam in the refrigerator box is the same as that of Embodiment 1.

[0054] After the foam box was cooled to room temperature, the rigid polyurethane foam in the box was t...

Embodiment 3

[0056] The composition of each raw material of the polyurethane foaming system of this embodiment by mass is:

[0057] 100 parts of pure white material;

[0058] 13 parts of foaming agent cyclopentane;

[0059] Polymerized MDI 136 parts.

[0060] Wherein the mass fraction of each component of the pure white material is:

[0061]

[0062]

[0063] Described polyether polyol A is the polyether polyol with sorbitol as initiator;

[0064] Described polyether polyol B is the polyether polyol with sucrose and mannitol as initiator;

[0065] The polyether polyol C is an amino polyether polyol with formaldehyde, diethanol and phenol as initiators obtained through the Mann reaction.

[0066] Utilizing the polyurethane foaming system of this embodiment, the method for manufacturing the heat-insulating rigid polyurethane foam in the refrigerator box is the same as that of Embodiment 1.

[0067] After the foam box was cooled to room temperature, the rigid polyurethane foam in t...

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Abstract

The invention discloses a refrigerator rigid polyurethane foam foaming formula, and relates to the technical field of polyurethane materials. The foaming formula is prepared after premixed polyether polyol and polymerized MDI are mixed, wherein a mass ratio of the premixed polyether polyol to the polymerized MDI is 1 to (1.1 to 1.4); the premixed polyether polyol contains a pure white material anda physical foaming agent; the pure white material is prepared from the following substances in percentage by mass: 25%-55% of polyether polyol A with a hydroxyl value of 250-500 mgKOH / g, 15%-60% of polyether polyol B with a hydroxyl value of 300-500 mgKOH / g, 10%-30% of polyether polyol C with a hydroxyl value of 250-500 mgKOH / g, 2-4% of catalyst TMR-2 and 2-3% of surfactant organosilicone. According to the refrigerator rigid polyurethane foam foaming formula, by reasonably matching the components in the formula, the mobility of a foaming raw material is improved, so that a mould is evenly filled with the foaming raw material, and the overall heat insulation performance of a refrigerator is improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane materials, in particular to a foaming formula of rigid polyurethane foam for refrigerators and a preparation method for the foaming formula of rigid polyurethane foam for refrigerators. Background technique [0002] With the continuous development of refrigerator technology, the volume of refrigerators is getting larger and larger, and its wall thickness is getting thinner and thinner. The refrigerator wiring harness is more crowded in a relatively narrow space. During the foaming process of the refrigerator, the flow path of the polyurethane raw material is narrow and the resistance of the flow path increases, resulting in insufficient flow of the polyurethane raw material in the refrigerator, resulting in uneven distribution of the polyurethane foam, and the phenomenon of poor filling is increasing, which affects the overall insulation performance of the refrigerator. Therefore it is impera...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08J9/14
CPCC08G18/4804C08J9/141C08J2203/14C08J2375/08
Inventor 刘鹏江峰吴园
Owner CHANGHONG MEILING CO LTD
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