Flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash

A rigid foam and microencapsulation technology, applied in the field of polyurethane modification, can solve the problems affecting the foaming process of polyurethane, the complexity of the preparation process, and the impact on mechanical properties, so as to increase the decomposition temperature and residual carbon content, and improve flame retardancy Performance, the effect of improving compression performance

Inactive Publication Date: 2020-02-04
HAIYING ENTERPRISE GROUP
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Problems solved by technology

The two methods have their own advantages and disadvantages. Physically added flame retardants are easy to operate and are suitable for large-scale production and utilization, but the particle size of flame retardants will affect the polyur

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  • Flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash
  • Flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash
  • Flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash

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[0016] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments.

[0017] The present invention uses melamine and formaldehyde synthesis precursor as the capsule material, adopts in-situ polymerization to prepare microencapsulated fly ash (MFA), and then prepares polyurethane rigid foams containing different contents of MFA.

[0018] The preparation method of MFA: Add 2.4ml formaldehyde solution and 10g melamine into a 250ml four-necked flask, then add 130ml of water, then adjust the pH to 9-10 with a certain concentration of sodium hydroxide, and react at 60℃ until the solution becomes After clarification, add 5g fly ash, then add gum arabic as a dispersant, adjust the pH to 4-6 with glacial acetic acid, and react for 2-3 hours. Then it is filtered, washed repeatedly until the pH is 7, and dried to obtain microencapsulated fly ash (...

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Abstract

The invention provides flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash. The flame retardant polyurethane rigid foamed plastic is prepared from a componentA and a component B, the component A is prepared from the following raw material components in parts by weight: 60-80 parts of polyether polyol, 0.5-3 parts of a catalyst, 0.5-1.5 parts of a foam stabilizer, 0.6-1 part of deionized water, 6-30 parts of MFA and 0.06-0.1 part of triethylene diamine, and the component B is prepared from 60-100 parts of polymethylene polyphenyl polyisocyanate in parts by weight. The flame retardant polyurethane rigid foamed plastic prepared based on the microencapsulated fly ash has good heat resistance, high compressive strength, high limit oxygen index and goodflame retardant properties.

Description

technical field [0001] The invention relates to the field of polyurethane modification, in particular to a flame-retardant polyurethane rigid foam prepared based on microencapsulated fly ash. Background technique [0002] Polyurethane foam (RPUF) is a new type of polymer composite material with excellent mechanical properties, acoustic properties, electrical properties and chemical properties. But polyurethane hard foam limit oxygen index has only 17 under normal temperature, is easy to burn, can not satisfy the use requirement, it is imperative to find a kind of method of high-efficiency environment-friendly flame-retardant polyurethane hard foam. Generally, there are two ways to improve flame retardancy: physical addition and chemical synthesis. The two methods have their own advantages and disadvantages. Physically added flame retardants are easy to operate and are suitable for large-scale production and utilization, but the particle size of flame retardants will affect ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08K9/10C08K7/26C08J9/08C08G101/00
CPCC08G18/48C08G18/7664C08K7/26C08K9/10C08G2110/0025C08G2110/0083
Inventor 宋道磊李立洪陈佳运
Owner HAIYING ENTERPRISE GROUP
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