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High-flame-retardant polyurethane foam material for vehicle seat based on modified isocyanate

A technology of polyurethane foam and isocyanate, applied in the field of polyurethane materials, can solve the problems of strong plasticizing effect, poor physical properties, unsatisfactory flame retardant effect, etc., and achieves the effect of small combustion smoke and avoiding long-term effects

Pending Publication Date: 2022-04-29
万华节能科技(烟台)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Adding phosphorus or halogen liquid flame retardants to the polyol component has problems such as strong plasticizing effect and migration of flame retardants;
[0006] 2. The development of polyols with flame retardant elements such as phosphorus, nitrogen, and halogen has the problems of poor physical properties, unsatisfactory flame retardant effect, and high cost;
[0013] At present, in order to meet the oxygen index requirements of 28% (TBT 3237-2010 technical requirements for flame-retardant materials for interior materials used in EMUs) and 26% (TBT 3138-2006 technical requirements for flame-retardant materials for rolling stock), passenger car seats for high-speed railways have chosen to use Melamine polyether (melamine polyether) is added to the combined polyether component, but it causes the release of formaldehyde>100mg / kg, seriously affecting people's health
[0014] At present, there is no perfect solution for vehicle seats that meet the oxygen index ≥ 26%, TVOC ≤ 50μgC / g, odor level (80 ℃) ≤ 3.5, formaldehyde emission ≤ 10mg / kg, fog test ≤ 5mg polyurethane foam materials

Method used

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  • High-flame-retardant polyurethane foam material for vehicle seat based on modified isocyanate
  • High-flame-retardant polyurethane foam material for vehicle seat based on modified isocyanate
  • High-flame-retardant polyurethane foam material for vehicle seat based on modified isocyanate

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A highly flame-retardant polyurethane foam material for vehicle seats based on modified isocyanate that can solve the above-mentioned technical problems in this embodiment includes modified isocyanate and polyol, and the mass ratio of the two is (110-150) :100, the chemical structural formula of modified isocyanate is as follows:

[0035]

[0036] The P content of this modified isocyanate is 4.7%, the N content is 12.7%, and the NCO% content is 19%.

[0037] A highly flame-retardant polyurethane foam material for vehicle seats based on modified isocyanate in this embodiment is formed by polymerizing modified isocyanate and polyol components, wherein the modified isocyanate uses trimethylolphosphine oxide Polymerized with TDI, the reaction equation is as follows:

[0038]

[0039] The reference synthesis process of modified isocyanate is:

[0040] (1) Heat the reactor to 48°C-52°C;

[0041] (2) According to the molar ratio of trimethylolphosphine oxide (purchase...

Embodiment 3

[0071] The index of embodiment 3 and embodiment 4 keep the amount of cyanate ester constant under the situation of 114 parts, without adding physical flame retardant, the oxygen index increases from 19.5% of non-flame retardant to 26.3% of flame retardant, while TVOC They are 34μgC / g and 31μgC / g respectively, and the odor level (80°C) is 3.5 and 3.5 respectively, which shows little change, indicating that the modified isocyanate of the present invention can simultaneously improve the flame retardancy of polyurethane foam while avoiding the purpose of flame retardants from reducing environmental protection indicators . It solves the problem of conflicting environmental protection indicators such as high flame retardancy, low TVOC and low odor.

[0072] Test example 3 index and test example 5 keep the amount of cyanate ester constant under the situation of 114 parts, test examples 3 and 5 improve foam flame retardancy by using modified isocyanate compound, adding physical flame ...

Embodiment 6

[0073] Example 6 The proportion of modified isocyanate and the weight ratio of polyols is 1.5:1, the phosphorus content in the foam system has increased to 2.82%, the oxygen index has increased to more than 28%, and environmental indicators such as TVOC, odor level (80 ° C), formaldehyde The release amount and the fog test remained basically unchanged, indicating that the modified isocyanate compound of the present invention can achieve the purpose of simultaneously improving the flame retardancy of polyurethane foam and avoiding the reduction of environmental protection indicators by flame retardants. It solves the problem of conflicting environmental protection indicators such as high flame retardancy, low TVOC and low odor.

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Abstract

The invention relates to a high-flame-retardant polyurethane foam material for vehicle seats based on modified isocyanate, and belongs to the technical field of polyurethane materials. The passenger car seat produced by using the passenger car seat combined polyether polyol and the modified isocyanate according to the mass ratio of 100: (110-150) has the oxygen index of 26.3-28.4%, wherein the foam TVOC with the oxygen index of 26.3% is 35 [mu] gC / g, the odor level (80 DEG C) is 3.5, the formaldehyde emission is 6.3 mg / kg, and the fog test is 3.68 mg.

Description

technical field [0001] The invention relates to a polyurethane foam material for highly flame-retardant vehicle seats prepared based on modified isocyanate, and belongs to the technical field of polyurethane materials. Background technique [0002] The total annual output of polyurethane in the world is about 20 million tons, and my country's output accounts for about 55% of the world's output. The most widely used and used products are foam products, accounting for about 40% of the share. The largest amount of polyurethane foam products are soft sponges for mattresses, sofas, car seats, etc., and rigid foams for building insulation in refrigerators, cold storage, and residential buildings. Many applications require polyurethane foam to have good resistance. It has good odor, TVOC and other environmental performance while burning ability. [0003] On the one hand, flame retardancy has become a bottleneck for the use of polyurethane foam in passenger cars, trains, and public...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/63C08G18/48C08G101/00
CPCC08G18/7621C08G18/7664C08G18/4072C08G18/485C08G18/632C08G2101/00C08G2110/0083
Inventor 王磊刘永亮窦忠山刘访艺余郁王耀西张峰沙丰
Owner 万华节能科技(烟台)有限公司
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