High-strength polyurethane rigid foam as well as preparation method and application thereof

A technology of rigid foam plastics and polyurethane, applied in the field of high-strength polyurethane rigid foam plastics, can solve the problems of increased usage of flame retardant additives, foam release, poor strength, fluidity and other performance problems, and achieve flame retardancy Improved performance and heat resistance, good mold release and heat insulation performance, and improved strength

Active Publication Date: 2015-06-03
WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As an insulation material used in home appliance systems, customers have higher and higher requirements for the flame retardant performance of foam. The use of polyester polyol, reactive flame re

Method used

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  • High-strength polyurethane rigid foam as well as preparation method and application thereof
  • High-strength polyurethane rigid foam as well as preparation method and application thereof
  • High-strength polyurethane rigid foam as well as preparation method and application thereof

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Embodiment Construction

[0036] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0037] Benzene imide modifier:

[0038] Add trimellitic anhydride and p-aminophenylacetic acid and 300ml acetone solvent into the reaction kettle with a molar ratio of 1:1, and then add 2.0wt% catalyst based on trimellitic anhydride and p-aminophenylacetic acid total amount after completely dissolving Anhydrous sodium acetate was subjected to ammoniation dehydration cyclization reaction at 70°C for 3 hours to form a nitrogen-containing five-membered heterocyclic dicarboxylic acid. The dibasic acid is then reacted with epichlorohydrin (molar ratio=1:2.0) through the catalysis of 0.6wt% triphenylphosphine to obtain a hydroxyl value of 220±25mgKOH / g and a functionality of 2.

[0039] Preparation of aromatic amine polyether polyols:

[00...

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Abstract

The invention discloses high-strength polyurethane rigid foam, as well as a preparation method and application thereof. The invention introduces a benzoyl imide reinforced polyurethane modifier with a rigid structure; the benzoyl imide reinforced polyurethane modifier, the corresponding high-viscosity aromatic amine polyether polyol, low functionality polyether polyol, special silicon oil for increasing isotropy of the foam, a catalyst with a specific structure, water and a foaming agent are used for preparing the premixed polyether polyols and react with the polyisocyanates to generate the high-strength polyurethane foam. The polyurethane rigid foam provided by the invention has the characteristics of low batch charging density, high compressive strength, low heat conductivity coefficient and good size stability under low temperature, and can be used in the household appliance inside insulating materials such as the fridge, the refrigerator, the solar energy, the gas water heater and the disinfection cabinet.

Description

technical field [0001] The invention belongs to the technical field of polymer material foam plastics, and in particular relates to a high-strength polyurethane rigid foam plastic. technical background [0002] As a thermal insulation material, rigid polyurethane foam has good thermal insulation properties, flame retardant properties, high mechanical properties, etc., and has been widely used in refrigerators, solar energy, water heaters, buildings, pipelines, containers and other fields. In recent years, affected by national environmental protection policies, raw material costs, production efficiency, quality requirements, etc., customer manufacturers have higher and higher performance requirements for polyurethane rigid foam. [0003] Under the condition of a certain core density, the polyurethane foam needs to maintain a high compressive strength. The high strength ensures that the refrigerator will not experience local "shrinkage" during cooling and can strongly support ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/50C08G18/48C08G18/32C08G18/76C08J9/14C08G101/00
CPCC08G18/3846C08G18/482C08G18/4883C08G18/5024C08G18/6666C08G18/7664C08J9/08C08J9/141C08J9/144C08J9/149C08J2203/02C08J2203/14C08J2203/142C08J2203/204C08J2375/08C08G2110/0025
Inventor 董国鹏朱霞林李雪艳
Owner WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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