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Polyisocyanurate foam plastic for ultralow-temperature insulation and preparation method thereof

A technology of polyisocyanurate and foam plastics, applied in the field of plastics, can solve problems such as brittle fracture, achieve the effect of improving temperature resistance, high strength, and reducing the risk of high temperature shrinkage and low temperature fracture

Active Publication Date: 2013-04-03
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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AI Technical Summary

Problems solved by technology

Brittle Fracture of Existing Polyisocyanurate Foam in Low Temperature Use

Method used

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  • Polyisocyanurate foam plastic for ultralow-temperature insulation and preparation method thereof

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Experimental program
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Effect test

Embodiment

[0031] 1) Mix 100g of polyol mixture (30g of glycerol-propylene oxide polyether; 30g of trimethylolpropane-propylene oxide polyether; 40g of trimethylolpropane polyester) with 10g of LK221 foam stabilizer and 50g of HCFC-141b The foaming agent and 5g of TMR-4 catalyst were mixed and stirred evenly.

[0032] 2) Add 300g of isocyanate solution PM-2010 to the mixture obtained in step 1, stir for 10s, pour the obtained mixture into a 200×200×100mm square steel mold within 30s for foaming reaction, the foaming reaction is 3min at room temperature.

[0033] 3) Heat the product obtained in step 2) in an oven at 60°C for 2 hours. After completion, polyisocyanurate foam with ultra-low temperature insulation performance can be obtained, and its density is 60kg / m 3 .

[0034] The thermal conductivity of the obtained foamed plastics was tested. According to GJB328 "Test Method for Low Temperature Steady State Thermal Conductivity of Thermal Insulation Materials", at the liquid oxygen t...

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Abstract

The invention relates to a polyisocyanurate foam plastic for ultralow-temperature insulation and a preparation method thereof, belonging to the technical field of plastics. The preparation method comprises the following steps: 1) uniformly mixing and stirring polyalcohol with foam stabilizer, foaming agent and catalyst to obtain a mixture; 2) adding an isocyanate solution into the mixture obtained in the step 1), stirring for 8-12 seconds, filling into a mold within 30 seconds, and carrying out foaming reaction at normal temperature for 2-3 minutes to obtain a foamed product; and 3) heating the foamed product obtained in the step 1) in a 50-80 DEG C drying oven for 1-3 hours to obtain the polyisocyanurate foam plastic. The invention polyisocyanurate foam plastic provided by the invention has favorable temperature resistance (the foam decomposition temperature is higher than 200 DEG C), and has the advantages of high material modulus and high strength in the aspects of mechanical properties; and the invention lowers the elongation at break on the premise of enhancing the temperature resistance, and is especially obviously apparent in a low-temperature environment.

Description

technical field [0001] The invention relates to a polyisocyanurate foam plastic for ultra-low temperature insulation and a preparation method thereof, belonging to the technical field of plastics. Background technique [0002] Rigid polyurethane foam is often used for the insulation of low-temperature storage tanks of aerospace vehicles, but the upper limit of the use temperature of polyurethane foam is 120°C. [0003] Patent CN1860147A "Catalyst Composition for Producing Rigid Polyurethane Foam and Isocyanurate Modified Rigid Polyurethane Foam and Raw Material Composition Containing It" mentioned a method for preparing isocyanurate foam, Use polyol polyether, water, amine mixture as main components. Existing polyisocyanurate foams suffer from brittle fracture in low temperature use. Contents of the invention [0004] The purpose of the present invention is to propose a polyisocyanurate foam plastic for ultra-low temperature insulation and its preparation method. The upp...

Claims

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Application Information

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IPC IPC(8): C08G18/70C08G18/48C08G18/42C08G18/16C08J9/14
Inventor 邱日尧杨汝平吴亮马晓静李坤远许小强丁仁兴赵一搏
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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