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Process for producing flexible polyurethane foam

A technology of soft polyurethane and manufacturing method, which is applied in the field of flexible polyurethane foam, and can solve the problems of insufficient ride quality, difficulty, low resilience flexible polyurethane foam, etc.

Inactive Publication Date: 2006-06-28
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the resonance point of general heat-treated foam is also within the human sensitive frequency range (4-8Hz), the ride performance is not good enough.
That is to say, according to the above-mentioned prior art, it is very difficult to manufacture a flexible polyurethane foam that satisfies various properties such as low resilience, high shock absorption and high durability.

Method used

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  • Process for producing flexible polyurethane foam
  • Process for producing flexible polyurethane foam
  • Process for producing flexible polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10、 comparative example 1～6

[0095] Using the raw materials and mixing amounts shown in Table 2 and Table 4, adjust the mixture of all raw materials except the polyisocyanate compound and the polyisocyanate compound solution to a liquid temperature of 25 ± 1°C respectively, in a polyoxyalkylene polyol containing Add a certain amount of polyisocyanate compound to the mixture, stir and mix with a high-speed mixer for 5 seconds, immediately inject the mixture into an aluminum mold heated to 60°C, 400 mm in length and width, and 100 mm in height, and seal it. After heat treatment for 6 minutes, the soft polyisocyanate was taken out, refined for more than 24 hours, and then the physical properties of each foam were measured. The measurement results are listed in Table 3 and Table 5. In addition, the moldability was evaluated by compressing the foam to 25% of the foam thickness immediately after molding and then releasing the foam cells (crushing). ○ indicates good, and symbol △ indicates unfavorable. In addit...

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PUM

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Abstract

The invention provides a process for producing a flexible polyurethane foam satisfying low resilience, high vibration absorption, and high durability. A mixture comprising 95 to 50 wt.% polyoxyalkylene polyol produced with an alkali metal catalyst and 5 to 50 wt.% polyoxyalkylene polyol produced with a composite metal cyanide complex catalyst is reacted with a polyisocyanate compound in the presence of a catalyst and a foaming agent to produce a flexible polyurethane foam which has a resonance frequency of 3.7 Hz or lower, a resonance ratio of 3.5 or lower, and a resilience of 70% or lower.

Description

technical field [0001] The invention relates to a rebound rate and the resonance frequency and resonance ratio measured by the vibration test method according to the automobile seat cushioning test method stipulated in the automobile standard ASO B407-87 can be controlled in the optimal range, and has low repellency , High shock absorption and high durability flexible polyurethane foam manufacturing method. Background technique [0002] Car seats are basically made of soft polyurethane foam bottom cushions, springs, and foam materials. The early flexible polyurethane foams were all foams made by heat treatment (hot cure), and used together with spring materials. Here, it is called heat-treated foam because the molecular weight of the polyoxyalkylene polyol used is relatively small (generally around 3000), the reaction is relatively slow, and the reaction is completed by heating from the outside of the model, so strong heating is required , so there is the name of heat trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/40C08G18/65
CPCC08G18/4866C08G18/4072C08G18/4804C08G18/6564C08G2101/0008C08G2101/0058C08G2101/0083C08G2350/00C08G2110/0058C08G2110/0008C08G2110/0083C08G18/48
Inventor 丰田贤伯和田浩志佐佐木孝之堀江彰雄杉山佳世子武安弘光
Owner AGC INC