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Polyurethane foaming plastic with improved heat flexibility and production thereof

A foamed plastics, polyurethane technology, applied in the field of polyurethane foamed plastics, can solve problems such as not mentioned

Inactive Publication Date: 2003-01-15
BAYER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not mention that the disclosed blown vegetable oil can be used to produce rigid closed-cell polyurethane foam

Method used

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  • Polyurethane foaming plastic with improved heat flexibility and production thereof
  • Polyurethane foaming plastic with improved heat flexibility and production thereof
  • Polyurethane foaming plastic with improved heat flexibility and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0143] An isocyanate-reactive composition was prepared consisting of the materials listed in Table 1, the amounts of which are expressed in parts by weight. These isocyanate reactive components were then reacted with ISOCYANATE B in an amount such that the isocyanate index was 110 using Cannon HE-120 RIM equipment. The reaction mixture was added to an aluminum plate mold heated at 60-77°C. The properties of the moldings are shown in Table 2.

[0144] Material

[0145] determination

[0146] These examples illustrate the simple addition, without modification, of blown soybean oil to a polyurethane-making reaction mixture treated by the RIM process, which confers no appreciable benefit on the physical properties of the polyurethane foam, However, it does not adversely affect the physical properties of the foam. Since the system is more expensive by excluding the more expensive materials in the isocyanate-reactive components, there is no savings in the cost...

Embodiment 10-18

[0148] An isocyanate-reactive composition was prepared consisting of the materials listed in Table 3, the amounts of which are expressed in parts by weight. Then, using Cannon HE-120 RIM equipment, these isocyanate-reactive components were reacted with ISOCYANATE B, and the amount of ISOCYANATE B was used to make the isocyanate index 110. The reaction mixture was added to an aluminum plate mold. The properties of the moldings are shown in Table 4.

[0149] Material

[0150] determination

[0151] These examples illustrate systems employing varying amounts of blown soybean oil to replace a portion of the more expensive polyols in the polyurethane-making reaction mixture. As can be seen from these tables, the physical properties of the polyurethane foam are not adversely affected when blown soybean oil is substituted for up to about 30% by weight of the polyol. Since there is no detrimental effect on the physical properties of the foam when an inexpensive ...

Embodiment 19-30

[0153] An isocyanate-reactive composition was prepared consisting of the materials listed in Table 5, the amounts of which are expressed in parts by weight. Then use Cannon HE-120 RIM equipment to make these isocyanate-reactive components react with ISOCYANATE A. The amount of ISOCYANATE A makes the isocyanate index 110. The reaction mixture was added to an aluminum plate mold. The properties of the moldings are shown in Table 6.

[0154] Material

PD

PE

SF

PU

CB

PA

LA

CA

BA

Example 19

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Example 20

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Example 21

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0.7

Example 22

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Example 23

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12

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0.7

Example 24

55 ...

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PUM

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Abstract

The RIM method is used to react organic polyisocyanate with an isocyanate-reactive mixture in which a large amount of bio-based polyol is present to produce rigid closed-cell polyurethane foam. Foam plastics produced using this method are characterized by improved heat sag and increased heat distortion temperature.

Description

technical field [0001] The present invention relates to polyurethane foams produced by reaction injection molding ("RIM"), and methods of producing such foams, in which polyurethane foams have a closed cell content of at least 90% and improved thermal deflection properties. Background technique [0002] The RIM process for producing polyurethane foams is well known. See e.g. Oertel, Polyurethane Brochure (Polyuretbane Handbook), Second Edition, 1994, Section 7.4, pp. 368-385, and US Patents 5,026,739, 5,225,453, 5,837,172, and 6,005,016. [0003] In these known methods, an organic diisocyanate or polyisocyanate is reacted with isocyanate-reactive ingredients comprising at least one (generally more than one) polyol, catalysts, crosslinkers and other processing aids. The polyols employed are generally polyols derived from sucrose, amines, glycerol, and ethylene glycol, among others. Most of these feedstocks are obtained from increasingly expensive petrochemicals. Accordi...

Claims

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Application Information

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IPC IPC(8): C08G18/65C08G18/30C08G18/32C08G18/36C08G18/48C08G18/66C08G18/78C08G101/00
CPCC08G18/6696C08G18/36C08J9/00C08J2201/022C08J2205/052C08J2205/10C08J2375/04C08G18/4816C08G2110/0025C08G18/78
Inventor J·L·克拉蒂
Owner BAYER CORP
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