Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of halogen-free intrinsically flame-retardant rigid polyurethane foam and its preparation method

A technology of rigid polyurethane and foamed plastics, applied in the field of foamed plastics, can solve the problems of core burning, mechanical properties of rigid polyurethane foamed plastics, influence of thermal insulation performance, poor compatibility of foamed substrates, etc., and achieves low cost, simple preparation method, The effect of improving flame retardant performance

Active Publication Date: 2017-11-28
XIAMEN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardant used in this preparation method is an inorganic additive flame retardant, which has poor compatibility with the foam matrix. When producing polyurethane foam products, the phenomenon of "core burning" is easy to occur, and it will affect the mechanical properties of rigid polyurethane foam. Performance, thermal insulation performance has a greater impact

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of halogen-free intrinsically flame-retardant rigid polyurethane foam and its preparation method
  • A kind of halogen-free intrinsically flame-retardant rigid polyurethane foam and its preparation method
  • A kind of halogen-free intrinsically flame-retardant rigid polyurethane foam and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Weigh 50g of phosphorus nitrogen flame retardant polyol, 20g of polyether polyol 4110, 30g of phthalic anhydride polyester polyol PS-3152, 1.0g of N,N-dimethylcyclohexylamine, 0.02g of dibutyltin dilaurate, 1.0g of foam stabilizer AL-5309, 0.1g of water and 25g of chlorodifluoroethane (HCFC-141B) were uniformly mixed to obtain a polyurethane composition;

[0034] 2) Quickly add 130g of polymethylene polyphenyl isocyanate (PAPI) into the polyurethane composition, stir and mix evenly at a high speed at room temperature 2500r / min, when the mixture is observed to be whitish, it is poured into a self-made mould. Foaming, foaming temperature 25°C, relative humidity 25% to 50%, aging for 48 hours (ie 2 days) after foaming, and then demoulding, to obtain halogen-free intrinsically flame-retardant rigid polyurethane foam. The obtained product is measured according to GB-T2406-93 "Plastic Combustion Performance Test Method Oxygen Index Method" and the oxygen index is 25.5.

...

Embodiment 2

[0039] 1) Weigh 55g of phosphorus nitrogen flame retardant polyol, 15g of polyether polyol 4110, 30g of phthalic anhydride polyester polyol PS-3152, 1.0g of N,N-dimethylcyclohexylamine, 0.02g of dibutyltin dilaurate, 1.0g of foam stabilizer AL-5309, 0.1g of water and 25g of chlorodifluoroethane (HCFC-141B) were uniformly mixed to obtain a polyurethane composition;

[0040]2) Quickly add 130g of polymethylene polyphenyl isocyanate (PAPI) into the polyurethane composition, stir and mix evenly at a high speed at room temperature 2500r / min, when the mixture is observed to be whitish, it is poured into a self-made mould. Foaming, foaming temperature 25°C, relative humidity 25% to 50%, aging for 48 hours (ie 2 days) after foaming, and then demoulding, to obtain halogen-free intrinsically flame-retardant rigid polyurethane foam. According to GB-T2406-93 "Plastic Combustion Performance Test Method Oxygen Index Method", the obtained product has an oxygen index of 27.

[0041] In this ...

Embodiment 3

[0043] 1) Weigh 60g of phosphorus nitrogen flame retardant polyol, 10g of polyether polyol 4110, 30g of polyester polyol PS-3152, 1.0g of N,N-dimethylcyclohexylamine, 0.02g of dibutyltin dilaurate, 1.0g Foam stabilizer AL-5309, 0.1g water and 25g difluorochloroethane (HCFC-141B), mix uniformly to obtain polyurethane composition;

[0044] 2) Quickly add 130g of polymethylene polyphenyl isocyanate (PAPI) into the polyurethane composition, stir and mix evenly at a high speed at room temperature 2500r / min, when the mixture is observed to be whitish, it is poured into a self-made mould. Foaming, foaming temperature 25°C, relative humidity 25% to 50%, aging for 48 hours (ie 2 days) after foaming, and then demoulding, to obtain halogen-free intrinsically flame-retardant rigid polyurethane foam. According to GB-T2406-93 "Plastics Combustion Performance Test Method Oxygen Index Method", the obtained product has an oxygen index of 29.

[0045] In this embodiment, the phosphorus-nitroge...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
hydroxyl valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention provides halogen-free inherent flame retardant type RPUF (Rigid Polyurethane Foam) and a preparation method thereof. The preparation method comprises the following steps: firstly, uniformly mixing phosphorus-nitrogen flame retardant polyol, polyether polyol, polyester polyol, an amine catalyst, an organic tin catalyst, a foam stabilizer, water and a foaming agent, so as to obtain a polyurethane composition; then, adding isocyanate into the polyurethane composition, uniformly stirring, pouring the mixture into a die for foaming, curing, and finally demoulding, so as to obtain the halogen-free inherent flame retardant type RPUF. According to the invention, the molding technology is simple, a one-step pouring formation technology is adopted, the cost is relatively low, and the prepared halogen-free inherent flame retardant type RPUF has good flame retardant and fireproof properties, and the highest oxygen index of the RPUF can reach 32.

Description

technical field [0001] The invention relates to a foamed plastic, in particular to a halogen-free intrinsically flame-retardant rigid polyurethane foamed plastic and a preparation method thereof. Background technique [0002] Rigid polyurethane foam (RPUF) is widely used in construction, transportation, petrochemical pipelines, navigation, aviation, military and other fields due to its light weight, high specific strength, low thermal conductivity, sound insulation and shock resistance. The RPUF molecular chain contains a relatively high proportion of combustible hydrocarbon molecular chain segments, and the foam is a porous structure with low density and large specific surface area, which will accelerate the burning speed when burning, so the oxygen index of ordinary hard foam is only about 17%. It is a flammable material and cannot achieve the ideal flame retardant effect; at the same time, RPUF itself is non-toxic, but its combustion produces a large amount of toxic gas, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/32C08G18/48C08G18/42C08J9/14C08G101/00
CPCC08G18/3889C08G18/4208C08G18/48C08G18/6637C08G18/667C08G18/7614C08G18/7664C08G18/7671C08J9/141C08J9/144C08J2203/14C08J2203/142C08J2205/10C08J2375/08C08G2110/0025
Inventor 戴李宗陈国荣刘诚吴顺伟罗伟昂许一婷何凯斌
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com