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Method for producing flexible polyurethane foam, method for producing hot press molded article, and hot press molded article

A technology of soft polyurethane and manufacturing method, which is applied in the field of hot-pressed products to achieve the effects of excellent low resilience, excellent low resilience and air permeability

Inactive Publication Date: 2010-08-18
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the aforementioned methods, it is difficult to impart sufficient thermoformability to flexible polyurethane foam while maintaining excellent low resilience and air permeability.

Method used

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  • Method for producing flexible polyurethane foam, method for producing hot press molded article, and hot press molded article
  • Method for producing flexible polyurethane foam, method for producing hot press molded article, and hot press molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0177] Polyol A1 (27.7 parts), polyol B1 (38.8 parts), polyol B2 (31 parts), polyol C1 (6 parts), monohydric alcohol D1 (7.5 parts), amine catalyst N1 (0.25 parts), metal Catalyst M1 (0.04 parts), water (1.44 parts), foam stabilizer S1 (0.35 parts) and foam stabilizer S2 (0.35 parts) were mixed to make a polyol system liquid, and adjusted to a liquid temperature of 21±1°C. In addition, polyisocyanate I1 (isocyanate index 80) was adjusted to a liquid temperature of 21±1°C.

[0178] Add a specified amount of the aforementioned polyisocyanate I1 (isocyanate index 80) to the aforementioned polyol system liquid, stir with a mixer (1425 revolutions per minute) for 5 seconds, and inject it into the open upper part of the length and width of 300 mm × height at room temperature In a 300mm wooden box, a vinyl film is laid in the wooden box to make a flexible foam (slab foam). The obtained flexible polyurethane foam was taken out, left to stand in a room adjusted to room temperature (23...

Embodiment 2～8

[0180] A flexible foam was obtained in the same manner as in Example 1 except that the composition and isocyanate index of the polyol system liquid were changed to those shown in Table 1 and Table 2, and various physical properties were measured.

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PUM

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Abstract

Disclosed is a method for producing a flexible polyurethane foam which is excellent in low resilience, air permeability and hot moldability. Also disclosed is a method for producing a hot press molded article using such a flexible polyurethane foam. Further disclosed is a hot press molded article having low resilience and adequate air permeability. Specifically disclosed is a method for producing a flexible polyurethane foam, wherein a specific polyol and a specific polyisocyanate are reacted at an isocyanate index of less than 90 in the presence of a urethanization catalyst, a foaming agent and a foam control agent. Also specifically disclosed are a method for hot press molding a flexible polyurethane foam obtained by such a method, and a hot press molded article obtained by the hot press molding method.

Description

technical field [0001] The present invention relates to a method for producing a flexible polyurethane foam, a thermoformed article, and a thermoformed article. Background technique [0002] Soft polyurethane foams with a low resiliency, that is, low resiliency, are widely used, for example, as shock absorbing materials, sound insulating materials, and shock absorbing materials for automobiles, electronic equipment, and the like. For such flexible polyurethane foam, not only low resilience is required, but also high air permeability is required to facilitate heat dissipation. [0003] In addition, as the flexible polyurethane foam used for the above-mentioned applications, since it can be easily molded to an arbitrarily set density and thickness, it is obtained by thermocompression molding of a flexible polyurethane foam obtained by the reaction of polyol and polyisocyanate. Thermoformed products are widely used. [0004] Patent Document 1 discloses a low-resilience flexib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48B29C39/02B29K75/00B29K105/04C08G101/00
CPCC08G2101/0008C08G65/30C08G18/244C08G65/2663C08G2101/0083C08G65/2648C08G65/2609C08G18/4866C08G18/4808C08L71/02C08G18/283C08G2110/0008C08G2110/0083C08L2666/22
Inventor 佐佐木孝之贺来大辅
Owner AGC INC
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