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Imide-modified elastomer

An imide and elastomer technology, applied in the field of imide-modified elastomers, can solve the problems of increased elastomer components, difficulty in obtaining soft elastomers, and insufficient availability, and achieves excellent solvent resistance and reuse. Excellent effect of properties and formability

Inactive Publication Date: 2009-08-05
NITTA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current state of the imide-modified elastomers described in these documents is that the above-mentioned physical properties, that is, soft rubber-like materials with an elastic modulus, high strength, high heat resistance, etc., cannot be obtained sufficiently.
Specifically, in Patent Document 1, since the molecular weight of the diamine compound used is about several thousand, it is difficult to obtain a soft elastomer
In Non-Patent Document 1, the prepolymer of polyimide is synthesized in advance, and it is copolymerized with the urethane prepolymer, so the imide urethane prepolymer and the urethane prepolymer When the number of imide units formed between tetracarboxylic dianhydride and isocyanate or diamine is random, and since the aggregation of imide units is not uniform, the elastomer component increases and a soft rubber-like product is obtained , cannot obtain sufficient strength and heat resistance
In Non-Patent Document 2, since the urethane prepolymer is chain-extended with tetracarboxylic dianhydride, there is only one imide unit, so the elastomer component increases and a soft rubber-like product is obtained under, sufficient strength and heat resistance cannot be obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0101] An imide-modified elastomer (1) was synthesized according to the following formula.

[0102] [chemical 7]

[0103]

[0104] [In the formula, n represents an integer of 1-100. m represents the integer of 2-100. x represents the integer of 5-100. ]

[0105] (Synthesis of urethane prepolymer (j))

[0106] First, 4,4'-diphenylmethane diisocyanate (MDI) (h) [manufactured by Nippon Polyurethane Industry Co., Ltd.] was subjected to vacuum distillation. In addition, polyoxytetramethylene glycol (PTMG) (i) [trade name "PTMG1000" manufactured by Hodogaya Chemical Co., Ltd., weight average molecular weight: 1,000] was heated at 80° C., 2 to 3 mmHg, for 24 hours. Dry under reduced pressure.

[0107] Then, above-mentioned MDI (h) 30.4g and PTMG (i) 69.6g are respectively added in the 500ml four-necked detachable (separable) flask that is equipped with stirrer and gas introduction tube, under argon atmosphere, at 80 °C for 2 hours to obtain a urethane prepolymer (j) having ...

Synthetic example 2

[0114] Except that 30.4g of MDI(h) was changed to 27.3g, and 69.6g of PTMG(i) was changed to 72.7g, the rest were the same as the above Synthesis Example 1, and the weight average molecular weight was 2.5×10 4 The urethane prepolymer (j). Then, except having changed 1.034 g of MDA (k) into 0.721 g, it carried out similarly to the said synthesis example 1, and obtained the solution of the polyurethane-urea compound (1).

[0115] In the same manner as in Synthesis Example 1 above, except that 2.276 g of PMDA (m) added to the solution of the polyurethane-urea compound (1) was changed to 1.586 g, a sheet-like imide-modified elastic compound with a thickness of 100 μm was obtained. Body (2) (PUI sheet) (imide fraction: 25% by weight). The IR spectrum of the obtained imide-modified elastomer (2) was measured in the same manner as in Synthesis Example 1 above. The results are shown in figure 2 .

[0116] Depend on figure 2 It can be seen that at 1780cm -1 、1720cm -1 and 1380...

Synthetic example 3

[0118] Except for changing MDI(h)30.4g to 23.8g and PTMG(i)69.6g to 76.2g, the rest were the same as the above Synthesis Example 1, and the weight average molecular weight was 4.6×10 4 The urethane prepolymer (j). Then, except having changed 1.034 g of MDA (k) into 0.378 g, it carried out similarly to the said synthesis example 1, and obtained the solution of the polyurethane-urea compound (1).

[0119] In the same manner as in Synthesis Example 1 above, except that 2.276 g of PMDA (m) added to the solution of the polyurethane-urea compound (1) was changed to 0.831 g, a sheet-like imide-modified elastic compound with a thickness of 100 μm was obtained. Body (3) (PUI sheet) (imide fraction: 15% by weight). The IR spectrum of the obtained imide-modified elastomer (3) was measured in the same manner as in Synthesis Example 1 above. The results are shown in image 3 .

[0120] Depend on image 3 It can be seen that at 1780cm -1 、1720cm -1 and 1380cm -1 An absorption peak o...

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Abstract

An imide-modified elastomer represented by the following general formula (I): wherein, R 1 represents a divalent organic group having an aromatic ring or an aliphatic ring; R 2 represents a divalent organic group having a weight average molecular weight of 100 to 10,000; R 3 represents a divalent organic group having an aromatic ring, an aliphatic ring or an aliphatic chain; R 4 represents a tetravalent organic group having 4 or more carbon atoms; n represents an integer of 1 to 100; and m represents an integer of 2 to 100. The imide-modified elastomer is a rubber shaped material having a pliable elastic modulus and also has high strength and high thermal resistance.

Description

technical field [0001] The present invention relates to an imide-modified elastomer which is soft, rubber-like with an elastic modulus, and has high strength and high heat resistance. Background technique [0002] Depending on the application, the elastomer is required to be a soft rubber-like substance having an elastic modulus, and to have various physical properties such as high strength and high heat resistance. However, among current rubber materials, fluororubber and silicone rubber having high heat resistance have the problems of low recyclability due to thermosetting properties, and high molding and processing costs. In addition, although thermoplastic rubber is excellent in recyclability and molding processing cost, it has a problem of low heat resistance. [0003] On the other hand, as an elastomer excellent in heat resistance, there is an imide-modified elastomer. For example, Patent Document 1 describes an elastic polyimide elastomer compound (imide-modified el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G73/14
CPCC08G18/4854C08G18/4277C08G73/1042C08G18/10C08G73/14C08G73/1082C08G18/44C08G18/346C08G18/3225C08G18/83C08G73/10
Inventor 井上真一西尾智博井上清孝笠崎敏明坂口雄吾柴田次郎安藤卓史
Owner NITTA CORP
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