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Rigid polyurethane-aerogel silicon dioxide composite foam plastic

A technology for syntactic foam and rigid polyurethane, which is applied in the field of rigid polyurethane syntactic foam and its preparation, can solve the problems of insufficient mechanical strength of PU foam, deviation of flame retardant performance, etc., achieves improvement of mechanical strength and thermal insulation performance, and simple process Effect

Active Publication Date: 2014-07-30
JIANGSU LVYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PU foam has shortcomings such as insufficient mechanical strength and deviation in flame retardancy, which limit its application in the field of special materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation steps of rigid polyurethane foam: according to the ratio in Table 1, mix polyether polyol, polyester polyol, foam stabilizer, water, composite catalyst and blowing agent to obtain combined polyether polyol, and finally mix with two Silica airgel and isocyanate are stirred and mixed at high speed, and foamed in the mold at a foaming temperature of 50°C.

[0041] Polyether polyol a is prepared by addition reaction of sucrose and diethylene glycol as initiators with propylene oxide, and the hydroxyl value is 400-440 mgKOH / g; polyether polyol b uses sorbitol and glycerin as initiators with cyclic Propylene oxide is prepared by addition reaction, the hydroxyl value is 260-300mgKOH / g; polyether polyol c is prepared by addition reaction with pentaerythritol as the initiator and propylene oxide, the hydroxyl value is 420-460mgKOH / g; aromatic hydrocarbon Polyester polyol e is produced by reacting PET and diethylene glycol, and its hydroxyl value is 380-420 mgKOH / ...

Embodiment 2

[0045] The preparation steps of polyurethane rigid foam: according to the ratio in the table, mix polyether polyol, polyester polyol, foam stabilizer, water, composite catalyst and foaming agent evenly to obtain combined polyether polyol, and finally combine it with carbon dioxide Silica airgel and isocyanate are stirred and mixed at high speed, and foamed in the mold at a foaming temperature of 60°C.

[0046] Polyether polyol a is prepared by addition reaction of sucrose and diethylene glycol as initiators with propylene oxide, and the hydroxyl value is 400-440 mgKOH / g; polyether polyol b uses sorbitol and glycerin as initiators with cyclic Propylene oxide is prepared by addition reaction, the hydroxyl value is 260-300mgKOH / g; polyether polyol d is obtained by addition reaction with toluene diamine as the initiator, propylene oxide and ethylene oxide, and the hydroxyl value is 740-780mgKOH / g; phthalic anhydride polyester polyol f is prepared by reacting phthalic anhydride and...

Embodiment 3

[0050] The preparation steps of polyurethane rigid foam: according to the ratio in the table, mix polyether polyol, polyester polyol, foam stabilizer, water, composite catalyst and foaming agent evenly to obtain combined polyether polyol, and finally combine it with carbon dioxide Silica airgel and isocyanate are stirred and mixed at high speed, and foamed in the mold at a foaming temperature of 80°C.

[0051]Polyether polyol b is prepared by addition reaction of sorbitol and glycerin with propylene oxide, and the hydroxyl value is 260-300mgKOH / g; polyether polyol c is prepared by adding pentaerythritol It is prepared by synthetic reaction, the hydroxyl value is 420-460mgKOH / g; aromatic polyester polyol e is prepared by reaction of PET and diethylene glycol, and the hydroxyl value is 380-420mgKOH / g; flame-retardant polyether polyol g is Phenolic resin is prepared by addition reaction of initiator and propylene oxide, the hydroxyl value is 450-500mgKOH / g; polyol h: glycerin (gl...

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Abstract

The invention discloses a rigid polyurethane-aerogel silicon dioxide composite foam plastic which is prepared by foaming the following raw materials: polyether / polyester polyol, a composite catalyst, a foam stabilizer, water, a mixed foaming agent, polyisocyanate and a hydroxy silicon dioxide aerogel solution. The rigid polyurethane-aerogel silicon dioxide composite foam plastic disclosed by the invention is simple in process, can be subjected to large-scale industrialized production and enhances the mechanical strength and heat-insulating property of foams and can be suitable for an extreme ultralow temperature environment by adding hydroxy silicon dioxide aerogel resin.

Description

technical field [0001] The invention relates to a rigid polyurethane composite foam and a preparation method thereof, in particular to a preparation method of a low-density rigid polyurethane (PU)-aerogel silica composite foam. Background technique [0002] Conventional polyurethane foam is a foam product made of polyether polyol and isocyanate under the action of a blowing agent. It has excellent thermal insulation properties, mechanical properties, electrical properties, acoustic properties and chemical resistance, especially excellent thermal insulation properties. , And widely used in refrigerators, freezers, cold storage panels, sandwich panels, pipeline insulation, refrigerated containers, building energy conservation and other thermal insulation fields. [0003] However, PU foam has shortcomings such as insufficient mechanical strength and deviation in flame retardancy, which limit its application in the field of special materials. The materials used for cold and hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08K3/36C08G18/32C08G18/48C08G18/42C08G18/76C08G65/28C08G101/00
Inventor 林永飞崔爱华
Owner JIANGSU LVYUAN NEW MATERIALS
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