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Polycarbonate diol composition and its production method

A technology of polycarbonate diol and composition, which is applied in the field of polycarbonate diol composition, can solve problems such as difficult to handle, and achieve the effects of excellent sun resistance and excellent compatibility

Active Publication Date: 2021-09-24
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this polycarbonate polyol is crystalline and solid at room temperature, there is a problem that it is difficult to handle

Method used

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  • Polycarbonate diol composition and its production method
  • Polycarbonate diol composition and its production method
  • Polycarbonate diol composition and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Hereinafter, although an Example etc. are used and this invention is demonstrated in more detail, this embodiment is not limited to these examples at all. It should be noted that, unless otherwise specified, the parts in the examples are parts by mass.

[0069] In addition, in the following examples and comparative examples, various physical properties of the polycarbonate diol and the polyurethane film were tested according to the following test methods.

[0070]

[0071] [1.OH value]

[0072] Prepare the acetylation reagent by distilling 12.5 g of acetic anhydride with 50 ml of pyridine. Accurately weigh 2.5-5.0 g of the sample in a 100 ml eggplant-shaped flask. After adding 5 ml of the acetylation reagent and 10 ml of toluene with a whole-capacity pipette (wholepipet), the cooling tube was attached, and it stirred and heated at 100 degreeC for 1 hour. 2.5 ml of distilled water was added with a full-capacity pipette, followed by further heating and stirring for 1...

Embodiment 1

[0137] Into a 1 L separable flask equipped with a stirrer, a thermometer, and an Oldershaw distillation column with a reflux head overhead and a vacuum jacket, were placed 371 g of 1,3-propanediol, 1 g of 1,6-hexanediol, and ethylene carbonate To 430 g of ethyl ester, 0.08 g of tetrabutyl titanate was added as a catalyst. It was heated in an oil bath set at 190° C., and reacted for 12 hours while removing a part of the distillate from the reflux head at an inner temperature of the flask of 160 to 170° C. and a degree of vacuum of 13 to 5 kPa. Then, heat with an oil bath set at 180° C., set the internal temperature of the flask to 155 to 175° C., and reduce the degree of vacuum to 0.5 kPa to remove 1,3-propanediol, 1 , 6-hexanediol and ethylene carbonate. Through this reaction, a polycarbonate diol composition having a viscous liquid form at normal temperature was obtained.

Embodiment 2-12、14-17

[0139] A polycarbonate diol composition having a viscous liquid form at normal temperature was obtained in the same manner as in Example 1 except that the types and input amounts of the raw materials described in Table 1 were changed.

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Abstract

A kind of polycarbonate diol composition, it comprises the polycarbonate diol with specific repeat unit and terminal hydroxyl group, the repeat unit shown in following formula (A) comprises the repeat unit of following formula (B), following The ratio of the repeating unit represented by the formula (B) to the entire repeating unit represented by the following formula (A) is 84.0 mass% or more and 99.4 mass% or less, the number average molecular weight is 300 or more and 20,000 or less, the terminal primary OH group ratio It is more than 95%.

Description

technical field [0001] The present invention relates to a polycarbonate diol composition and a method for producing the same. Background technique [0002] In the past, as a soft segment used in thermoplastic elastomers such as polyurethanes, urethanes, esters, and amides, it has been proposed that the use can impart excellent heat resistance, weather resistance, hydrolysis resistance, oil resistance and resistance. Chemically reactive polycarbonate polyol. [0003] As such a polycarbonate polyol, a polycarbonate polyol in which 1,6-hexanediol is used alone as a diol component is generally used. However, since such polycarbonate polyol is crystalline and solid at normal temperature, there is a problem that it is difficult to handle. [0004] In order to solve these problems, it has been proposed to use 1,3-propanediol as a diol component to produce polycarbonate diol. For example, Patent Document 1 discloses the synthesis of polycarbonate diol using 1,3-propanediol alone ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/02C08K5/1575C08L69/00C08G18/44
CPCC08G18/44C08G64/02C08K5/1575C08L69/00C08L75/04C08G18/792C08G18/022C08G18/1875C08G18/246
Inventor 矢吹勇人增渕徹夫月森康之
Owner ASAHI KASEI KK