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Polyisocyanates for soft polyurethane foam board and producing method for soft polyurethane foam board using same

A polyisocyanate and polyurethane board technology, which is applied in the field of polyisocyanate for flexible polyurethane foam boards, can solve problems such as poor operability and high viscosity, and achieve good productivity and formability, good operability, and improved low-temperature storage stability Effect

Inactive Publication Date: 2006-10-18
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the freezing point of 4,4'-MDI is about 38°C under normal pressure, which is higher than that of TDI, and pretreatment such as prepolymer is required. Problems such as restrictions on production equipment conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] After nitrogen replacement in a reactor equipped with a stirrer, a cooling pipe, a nitrogen inlet pipe, and a thermometer, quantitatively add isocyanate and polyol according to the ratio shown in Table 1, and react at 80°C for 4 hours while stirring to obtain NCO-1. The isocyanate content of NCO-1 was 28.8%.

Embodiment 2～3、 comparative example 1～6

[0113] According to the ratio shown in Table 1, NCO-2-8 were prepared in the same manner as in Example 1. NCO-9 is the direct use of polymerized MDI-1 as NCO-9.

[0114] Example

comparative example

1

2

3

1

2

3

4

5

6

Polymerized MDI (parts)

Polymerized MDI-1

Polymerized MDI-2

polymeric MDI-3

90

80

95

90

90

90

59

98

100

Polyol (parts)

Polyol-1

Polyol-2

10

20

5

10

10

10

41

2

polyisocyanate liquid

name

NCO-1

NCO-

2

NCO-

3

NCO-4

NCO-5

NCO-6

NCO-7

NCO-8

NCO-9

Isocyanate content

(%)

28.7

25.3

30.4

...

Embodiment 4～10、 comparative example 6～10

[0124] According to the formulations recorded in Tables 3 and 4, the multi-component low-pressure foaming machine of Cannon Viking Company was used to manufacture flexible polyurethane foam boards with the following points. The temperature is adjusted to the raw material temperature of 25±2°C, and the components are stirred and mixed at a given ratio at a rotation speed of 4500rpm, and continuously poured onto a conveyor belt with a width of 750mm to form a foam plate with a length of 2000mm and a height of 700mm. The obtained polyurethane foam was left to stand for a whole day and night after production, and then the foam was cut into 300 mm×300 mm×50 mm, and its physical properties were measured. The results are shown in Tables 3 and 4.

[0125] Example

[0126] comparative example

[0127] In Tables 3 and 4, the state of the foam: evaluated by the state such as the appearance of the manufactured foam.

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PUM

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Abstract

The present invention provides a soft polyurethane foam plate with a well -operated stabilization stability of low temperature storage and well operating at low viscosity. Polycylisocyanate, as well as good productivity and formability, can be manufactured by low -density soft polyurethane bubble boards.The invention is prepared by reacting the polymerization MDI (A) and polyol (B) in the following shown below (A) / (B) = 80 / 20-95 / 5 (quality ratio), and the content of isocyanate is 25~ 32 quality %, aggregate MDI (A): The content of the dual -core component is 50 to 80 % of the mass, and 4, 4' -diophenyl nterrocyanate in dual -core components is 10~ 20 % of the polymerization MDI.Polynes (B): Polyal polymer polymiol with average official energy base of the nominal nominal is 4 and the average molecular weight of 5000 to 100,000.

Description

technical field [0001] The present invention relates to a polyisocyanate for a flexible polyurethane foam board and a method for producing a flexible polyurethane foam board using the polyisocyanate. More specifically, it relates to a polyisocyanate for a flexible polyurethane foam board having improved low-temperature storage stability and good handleability at low viscosity, and a method for producing a flexible polyurethane foam board which is excellent in productivity and formability and can be reduced in density. Background technique [0002] Flexible urethane foam boards can be cut into appropriate sizes, and are widely used as cushion materials for furniture and car seats, mattresses for bedding, pillows, industrial sealing materials, and sound insulation materials. In recent years, with the progress of aging, the demand for foam materials with good support and high flame retardancy has increased in furniture and mattress applications. Furthermore, at the production ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08J9/04
Inventor 园田健太郎吉井直哉大林直之山田卓
Owner NIPPON POLYURETHANE IND CO LTD
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