Soft urethane foam with continuous air bubbles and preparation method thereof

A soft polyurethane and foam technology, which is applied in the field of soft polyurethane flat foam and its preparation, can solve the problems of low density, low foam resilience modulus, and low air permeability, and achieve high density, high air permeability, and high resilience modulus effect

Inactive Publication Date: 2010-06-23
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the rebound modulus is high, the density is low and it is not a soft-touch foam
In addition, the urethane that constitutes the foam skeleton is designed to be high-strength so that it does not feel like it is bottoming out even when the weight of the human body is loaded with light weight, so that even though the cells are continuous cells, even if they are broken, the pores cannot be completely destroyed. , low ventilation
[0004] On the other hand, in general continuous-cell flexible polyurethane foam, the soft-touch foam has a low modulus of resilience, and it is very difficult to obtain a foam with a high density and a high modulus of resilience

Method used

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  • Soft urethane foam with continuous air bubbles and preparation method thereof

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Embodiment

[0039]

[0040] 1) Polyether polyol compound

[0041] EP505SNB:

[0042] Ethylene oxide+propylene oxide copolymerized polyether polyol, EO=72% by weight, trifunctional, hydroxyl value=52 mgKOH / g (manufactured by Mitsui Chemicals Polyurethane Co., Ltd.)

[0043] PPG-3000:

[0044] Propylene oxide polymer polyether polyol, trifunctional, hydroxyl value=56 mgKOH / g (manufactured by Dow Chemical Company)

[0045] GR-09:

[0046] Trifunctional low molecular weight polyether polyol compound, hydroxyl value=400mgKOH / g (manufactured by Mitsui Chemicals Polyurethane Co., Ltd.)

[0047] 2) Catalyst: TEDA 33LV (manufactured by Tosoh Corporation)

[0048] 3) Cross-linking agent: glycerol

[0049] 4) JPP88: Antioxidant (manufactured by Seonghoku Chemical Co., Ltd.)

[0050] 5) Foaming agent: water

[0051] 6) Foam stabilizer: SF2904 (manufactured by Toray Dow Corning)

[0052] 7) Isocyanate component: TDI-80 (2,4-TDI / 2,6-TDI=80 / 20)

[0053]

[0054] According to the compounding...

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Abstract

The invention aims to provide soft urethane foam with continuous air bubbles, soft tactility, high density, high air permeability and high modulus of resilience and a preparation method for the soft urethane foam with continuous air bubbles. In order to achieve the purposes, in the soft urethane foam obtained through the reaction between polyhydric alcohol component and polyisocyanate compound, as a polyhydric alcohol component, the soft urethane foam has a hydroxyl value of 30-70 mgKOH/g and comprises polyhydric alcohol compound containing two polyether polyol compounds with different ethylene oxide content and trifunctional crosslinking agent with the molecular weight of below 150 according to the needs, and simultaneously, the content of polyether polyol compound A is 50-90 parts by weight in 100 parts of polyol compound by weight. As a polyhydric alcohol component, trifunctional crosslinking agent with the molecular weight of below 150 is preferred, and the content thereof is 0.25-2.25 parts by weight in 100 parts of polyol compound by weight.

Description

technical field [0001] The invention relates to continuous cell flexible polyurethane foam with soft touch, high density, high air permeability and high resilience modulus, especially flexible polyurethane flat foam and a preparation method thereof. Background technique [0002] As flexible polyurethane foams having a high modulus of resilience, there are known compression-molded foams widely used as automobile seat cushions, as described in JP-A-3-68618 and JP-A-8-157554. In these documents, all disclose a kind of essential component that uses polymer polyol as polyol compound, and overall density is 55kg / m 3 Below, the core density except the surface layer is 50kg / m 3 The following molded foam. [0003] The flexible polyurethane foams with a high modulus of resilience described in JP-A-3-68618 and JP-A-8-157554 are lightweight car seat cushions that require cushioning properties to prevent transmission of vehicle vibrations to the human body. . Therefore, although the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/66C08G101/00
Inventor 鎌田昌宏泽田晃之
Owner TOYO TIRE & RUBBER CO LTD
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