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Polyurethane integral skin foam composition, polyurethane integral skin foam and method of manufacture thereof

A technology of composition and foam, which is applied in the field of polyurethane integral skin foam composition, can solve the problems of high mechanical strength, difficulty in maintaining liquid state, and inability to obtain it, and achieve the effect of improving mechanical strength and high production stability

Active Publication Date: 2020-04-28
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since this polyurethane foam uses MDI polymers or modified carbodiimides, high mechanical strength may not be obtained
Furthermore, since polytetramethylene ether glycol with high crystallinity is used as the isocyanate used, and the isocyanate group content rate is low, it is expected to have a high viscosity, and it is difficult to maintain a liquid state at room temperature, so care must be taken during use.

Method used

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  • Polyurethane integral skin foam composition, polyurethane integral skin foam and method of manufacture thereof
  • Polyurethane integral skin foam composition, polyurethane integral skin foam and method of manufacture thereof
  • Polyurethane integral skin foam composition, polyurethane integral skin foam and method of manufacture thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example I-1

[0062] Put 859g of low-isomer ratio MDI in a 1L reactor equipped with a stirrer, thermometer, cooler, and nitrogen inlet pipe, and after heating up to 75°C, put in 141g of DPG. The urethanization reaction was performed for 3 hours while mixing uniformly with a stirring blade. It cooled to 40 degreeC, and obtained the organic polyisocyanate composition "I-1" (MDI content ratio 100%, MDI isomer ratio 1%, NCO group content ratio 20.0%, viscosity 2330mPa·s at 40 degreeC).

Synthetic example I-2

[0064] Put 773g of low-isomer ratio MDI into a reactor with a capacity of 1L equipped with a stirrer, a thermometer, a cooler, and a nitrogen gas introduction pipe. After heating up to 75°C, put 127g of DPG into it. The urethanization reaction was performed for 3 hours while mixing uniformly with a stirring blade. Thereafter, 100 g of DOM was charged and uniformly mixed with a stirring blade at 50° C. for 1 hour, and then cooled to 40° C. to obtain an organic polyisocyanate composition “I-2” (MDI content ratio 100%, MDI isomer ratio 1%, NCO group content 18.0%, viscosity 860mPa·s at 40°C).

Synthetic example I-5

[0066] Put 577g of low-isomer ratio MDI and 115g of liquid MDI into a 1L reactor equipped with a stirrer, thermometer, cooler, and nitrogen inlet pipe. After the temperature rises to 75°C, put 107g of DPG and keep the temperature. Next, the urethanization reaction was performed for 3 hours while uniformly mixing with a stirring blade. Thereafter, 200 g of DOM was charged and uniformly mixed with a stirring blade at 50° C. for 1 hour, and then cooled to 40° C. to obtain an organic polyisocyanate composition “I-5” (MDI content ratio 95%, MDI isomer ratio 1%, NCO group content 18.0%, viscosity 450mPa·s at 40°C).

[0067] [Isocyanate Synthesis Example I-3~4, I-6~11]

[0068] Organic polyisocyanate compositions I-3-4, I-6-11 were obtained by performing the same operation as I-1, I-2, and I-5 using the raw material shown in Table 1-Table 2. The blending of raw materials in the table is expressed in parts by mass.

[0069] 【Table 1】

[0070]

[0071] 【Table 2】

[0072]

[00...

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Abstract

The invention provides an ISF having high impact resilience and excellent in mechanical strength and productivity, and to provide a method for manufacturing the ISF. The ISF can be prepared from a polyurethane integral skin foam composition obtained from an organic polyisocyanate composition, a polyol component, a catalyst, and a blowing agent, wherein the organic polyisocyanate composition comprises an isocyanate group-terminated prepolymer obtained from an isocyanate component comprising MDI and DPG. The MDI content in the isocyanate component containing the MDI is 97 mass% or more, and thetotal content of MDI isomers in the MDI in the isocyanate component containing the MDI is less than 3 mass%. The polyurethane integral skin foam composition is characterized by having an isocyanate group content of 15 to 25% by mass.

Description

technical field [0001] The present invention relates to a composition for polyurethane integral skin foam (hereinafter, sometimes referred to as "ISF"), ISF, and a method for producing the ISF. Background technique [0002] ISF is widely used as automotive interior parts such as raw materials for shoe soles and steering wheels due to its excellent productivity, mechanical strength, and excellent touch, but it has a high spring rate suitable for high-performance shoe soles, etc. , and has an ISF with excellent mechanical strength has not been known so far. [0003] Patent Document 1 proposes a highly elastic flexible polyurethane foam using diphenylmethane diisocyanate (hereinafter, sometimes referred to as "MDI") and having a relatively high density. [0004] However, this polyurethane foam achieves a high modulus of elasticity by increasing the amount of chemical crosslinking using a crosslinking agent, and there is a possibility that sufficient mechanical strength such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/76C08G18/66C08G18/48C08G101/00
CPCC08G18/3206C08G18/7671C08G18/4854C08G18/6674C08G2410/00C08G2110/0083
Inventor 长冈毅伊东浩幸吉井直哉
Owner TOSOH CORP