Preparation method of environment-friendly PU (polyurethane) ceiling with flame retardant and sound absorption functions

A polyurethane and environmentally friendly technology, applied in the field of polymer chemical materials, to achieve the effects of low overall cost, low board density, and less material consumption

Active Publication Date: 2014-04-16
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based adhesives need to be introduced in the above-mentioned treatment methods, and there will inevitably be solvent residues in the final product, so there are environmental problems

Method used

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  • Preparation method of environment-friendly PU (polyurethane) ceiling with flame retardant and sound absorption functions

Examples

Experimental program
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Effect test

preparation example Construction

[0025]The invention provides a method for preparing an environment-friendly polyurethane flame-retardant sound-absorbing ceiling. Polyester-type isocyanate prepolymer is used as an adhesive, mixed evenly with pulverized waste polyurethane rigid foam particles, and then molded into an environment-friendly polyurethane insulation ceiling. Sound-absorbing ceiling, wherein, the polyester-type isocyanate prepolymer is 5-10 parts by weight, the crushed waste polyurethane rigid foam particles is 90-95 parts by weight, and the polyester-type isocyanate prepolymer is An isocyanate prepolymer with an NCO content of 10-30% is prepared by reacting diisocyanate and polyester polyol at 60-80°C.

[0026] Wherein, a better processing flow using the method of the present invention is:

[0027] (1) a. Prepare polyester type isocyanate prepolymer;

[0028] The isocyanate prepolymer with an NCO content of 10-30% is prepared by reacting diisocyanate and polyester polyol at 60-80°C; among them...

Embodiment 1

[0053] Put 5.0kg of PMDI and 3.9kg of PEDA1500 into the reaction kettle, control the temperature at 60~65°C for 3~4h, discharge, and detect that the NCO content is 15.1%, and obtain a qualified polyester isocyanate prepolymer;

[0054] Pulverize the waste polyurethane rigid foam into particles below 10 mesh through a pulverizer;

[0055] Put 12 kg of waste polyurethane rigid foam particles into the mixer, start stirring to make the above particles roll in the equipment, spray evenly into 1 kg of the above-mentioned prepared polyester isocyanate prepolymer, stir and mix evenly;

[0056] Spread the mixture obtained above evenly into a mold of 2.00×1.00×0.02m between the heating plates of the press, and perform a preheating treatment at 100°C for 5 minutes; then, start the pressure to 15MPa, and then hold Press for 15 minutes, demould, and get the environment-friendly polyurethane flame-retardant sound-absorbing ceiling.

[0057]

Embodiment 2

[0059] Put 5.0kg of PMDI and 0.158kg of PEDA2000 into the reaction kettle, control the temperature at 60~65°C for 3~4h, discharge the material, and detect that the NCO content is 30.0%, and obtain a qualified polyester isocyanate prepolymer;

[0060] Pulverize the waste polyurethane rigid foam into particles below 10 mesh through a pulverizer;

[0061] Put 13.68kg of waste polyurethane rigid foam particles into the mixer, start stirring to make the above particles roll in the equipment, spray evenly into 0.72kg of the above-mentioned polyester isocyanate prepolymer, stir and mix evenly;

[0062] Spread the mixture obtained above evenly into a mold of 2.00×1.00×0.02m between the heating plates of the press, and perform a preheating treatment at 120°C for 5 minutes. At the same time, place PVC leather veneer materials on both sides of the mold; then, start The pressure is increased to 20 MPa, and then the pressure is maintained at 120°C for 20 minutes, and the mold is demoulded ...

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Abstract

The invention discloses a preparation method of an environment-friendly PU (polyurethane) ceiling with flame retardant and sound absorption functions. The preparation method comprises the following steps: adopting polyester isocyanate prepolymer as an adhesive; uniformly mixing the polyester isocyanate prepolymer with crushed waste PU rigid foam granules; carrying out mould pressing to manufacture the environment-friendly PU ceiling with the flame retardant and sound absorption functions. The ceiling comprises 5-10 parts of the polyester isocyanate prepolymer and 90-95 parts of the crushed waste PU rigid foam granules by weight; the polyester isocyanate prepolymer is isocyanate prepolymer which is prepared through reaction between diisocyanate and polyester polyatomic alcohol in 60-80 DEG C and contains 10-30% of NCO. The preparation method adopts the polyester isocyanate prepolymer as the adhesive; a product prepared according the method is excellent in performance, out of solvent and formaldehyde, safe, and environment-friendly; a large quantity of waste polyurethane rigid foam can be treated by adding a small quantity of the polyester isocyanate prepolymer; meanwhile, a pressed plate is low in density, material consumption and comprehensive cost.

Description

technical field [0001] The invention belongs to the field of polymer chemical materials, and relates to a preparation method of an environment-friendly polyurethane flame-retardant sound-absorbing ceiling. Background technique [0002] Polyurethane is the fastest-growing polymer synthetic material in recent decades, and is widely used in various industries and fields such as national defense, aerospace, transportation, industry, agriculture, sports, medical and health. Polyurethane rigid foam is an important branch of polyurethane materials. It has excellent thermal insulation properties and is widely used in many fields such as walls, pipes, solar energy, refrigerators, and ships. Among them, polyurethane rigid foam has the fastest development in the field of wall insulation and is favored by the market. Throughout the application and development process, people inevitably need to face the problem of how to deal with a large amount of waste polyurethane rigid foam. These ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L75/06C08G18/76C08G18/42E04F13/075B29C43/00
Inventor 朱彦崔恩密戴胜尤金明唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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