Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound Intumescent Flame Retardant for Rigid Polyurethane Foam

An intumescent flame retardant and matching technology, applied in the field of flame retardant, can solve problems such as the influence of the mechanical properties of the matrix, and achieve the effects of improving mechanical properties, improving thermal stability and simple preparation process

Inactive Publication Date: 2018-08-21
ZHONGBEI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is also difficult to make RPUF reach the level of flame retardant materials when used alone, and because they are all additive flame retardants, they will also affect the mechanical properties of the matrix

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
  • Compound Intumescent Flame Retardant for Rigid Polyurethane Foam
  • Compound Intumescent Flame Retardant for Rigid Polyurethane Foam
  • Compound Intumescent Flame Retardant for Rigid Polyurethane Foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of phosphorus-nitrogen expansion type polyol (PDTM) of the present invention:

[0023] Disperse 0.1 mol of pentaerythritol phosphorus oxychloride in acetone / water and place it in a three-necked flask, add 0.15 mol of aminotrimethylolmethane and 0.2 mol of triethylamine, react at room temperature for 2 hours (or 3 hours, or 4 hours), and then react at 40°C Reaction for 1h (or 1.5h, or 2h); vacuum rotary evaporation to remove the solvent and acid-binding agent to obtain a white solid, which was washed and purified to obtain the target product PDTM with a yield of over 90%.

Embodiment 2 to 6

[0025] The preparation of flame-retardant rigid polyurethane foam by compounding phosphorus-nitrogen expandable polyol (PDTM) and expandable graphite (EG) according to the present invention will be further illustrated by specific examples below. Polyether 4110 polyol (JH-4110), expandable polyol flame retardant (PDTM), expandable graphite (EG), dibutyltin dilaurate (DBTDL), triethanolamine (THA), foam stabilizer silicone oil (SD-201), water and other reasonable formula mixing (isocyanate index R = 1.05 ~ 1.1), rapid stirring for 3 minutes, then add polymethylene polyphenyl isocyanate (PM-200) into the mixing system, rapid stirring After 20 seconds, add it to the mold, control the volume and shape it, and then cure it in an oven at 70°C for 12 hours to get a flame-retardant rigid polyurethane foam, and the density of the obtained sample is basically controlled at 50kg / m 3 about. Test and compare the LOI test values ​​under the condition of adding different components and conte...

Embodiment 7 to 11

[0029] Polyether 4110 polyol (JH-4110), expandable polyol flame retardant (PDTM), expandable graphite (EG), dibutyltin silicate (DBTDL), tertiary amine catalyst A33, foam stabilizer silicone oil ( AK8803), water and physical foaming agent (HCFC-141b) and other reasonable formulations (isocyanate index R = 1.05 ~ 1.1), rapid stirring for 3 minutes, and then polymethylene polyphenyl isocyanate (PM-200) was added to the In the mixing system, stir quickly for 20s, transfer to the mold, control the volume for molding, and cure in an oven at 70°C for 12 hours after molding to obtain a flame-retardant rigid polyurethane foam, and the density of the obtained sample is basically controlled at 50kg / m 3 about. Test and compare the LOI test values ​​under the condition of adding different components and contents of flame retardants. Among them, Example 7 is used as a comparison of non-flame retardant RPUF in this group of formulations. The specific data results are shown in Table 2. It s...

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
densityaaaaaaaaaa
oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a compound intumescent flame retardant for hard polyurethane foam, which is used for forming hard polyurethane foam according to the mass percent of 16-24%. The halogen-free compound flame retardant is composed of a novel phosphorus-nitrogen intumescent polylol and expandable graphite in a mass ratio of 1:1-2:1. The phosphorus-nitrogen intumescent polylol has the flame-retardant elements of phosphorus and nitrogen and the hexahydroxy active group, can participate in the polyurethane foaming and forming reaction, has favorable compatibility with the expandable graphite, and does not destroy the mechanical properties of the material on the premise of efficiently enhancing the flame retardancy of the hard polyurethane foam. The compound intumescent flame retardant is simple in preparation technique and convenient for industrial production. The intumescent flame-retardant hard polyurethane foam prepared from the system can be used in the fields of building energy-saving thermal insulation and the like with higher requirements for flame retardancy.

Description

technical field [0001] The invention aims at the flame retardant technology of rigid polyurethane foam materials, and specifically relates to a compound expansion flame retardant for rigid polyurethane foam. Background technique [0002] Rigid polyurethane foam (RPUF), as an excellent thermal insulation material, has been widely concerned and applied. Due to its excellent mechanical properties and simple molding process, RPUF is used more and more widely. However, the porous structure makes RPUF easier to ignite than ordinary polymer materials, and it will only spread on a large scale after being ignited, but it is basically unable to self-extinguish, thus restricting the application range of RPUF; material has important practical significance. [0003] At present, most of the organic flame retardants used in flame retardant RPUF can not produce good flame retardant effect on it; expandable graphite (EG) can effectively improve the flame retardant performance of RPUF, but i...

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): C08G18/32C08G18/66C08K7/24
CPCC08G18/3889C08G18/6688C08K7/24C08G2110/0025
Inventor 赵斌李飞刘亚青刘东月梁文俊
Owner ZHONGBEI UNIV