Copolymer and method for producing polyurethane

A technology of copolymerization and copolymerization reaction, which is applied in the field of preparation of copolymers, can solve problems such as the treatment of a large amount of waste acid, and achieve the effect of a simple preparation method

Pending Publication Date: 2021-03-26
HODOGAYA KAGAKU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, boron trifluoride-based, fuming sulfuric acid-based, fluorosulfuric acid and other catalyst systems ha

Method used

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  • Copolymer and method for producing polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] [Example 1]

[0060] [THF-polycaprolactone copolymer synthesis]

[0061] Add ε-caprolactone (B) 63.3 g (0.56 molar, relative to five-membered cycloherath ether (A) and lactone (B) with ε-caprolactone (a) and lactone (B) by 50 mol%. , THF (A) 40.0g (0.56 mol, 0.56 mol, with respect to the five-membered ring ring ether (a) and lactut (b) of 50 mol%), 1, 4 - butanediol (C) 1.7 g (0.02 moles, relative to five-membered cyclic ether (a) and lactives (b) of 1.6 mol%, Japanese Banka Chemical Co., Ltd.), phosphate Tungsten Acid (catalyst) 0.6 g (0.0003 moles, the total molar number of 0.02 mol%, Japanese New Metal Co., Ltd.), and the thermometer, nitrogen Seals, mixing devices. After stirring at 25 ° C for 15 minutes, the total molar number of oxide (D) 6.4 g (0.11 moles, relative to the five-membered cyclic ether (A) and the lactone (B) was added to 10.0 mol%. , Japanese Sanada Chemical Co., Ltd. was prepared and stirred at 25 ° C for 4 hours. Next, THF100 mL was added to the react...

Example Embodiment

[0062] [Example 2]

[0063] [THF-polycaprolactone copolymer synthesis]

[0064] The polymerization reaction was performed by the same conditions as in Example 1, except that the ε-caprolactone of Example 1 was changed to 37.7 g (0.33 mole), and THF was changed to 55.5 g (0.77 mole). The combination ratio of each raw material, the reaction temperature / stirring time, and the obtained polymer yield, number average molecular weight (Mn), and the analysis results of the color number are shown in Table 1.

Example Embodiment

[0065] [Example 3]

[0066] [3-methyl-THF-polycaprolactone copolymer synthesis]

[0067] The polymerization is performed by the same conditions as in Example 1, except that THF48.2 g (0.56 mol) of Example 1 was replaced with 3-methyl-THF48.2 g (0.56 mol). The combination ratio of each raw material, the reaction temperature / stirring time, and the obtained polymer yield, number average molecular weight (Mn), and the analysis results of the color number are shown in Table 1.

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Abstract

The invention relates to a copolymer and a preparation method of polyurethane. Provided is a method for industrially producing a high-quality polyether in a very simple and waste-free manner, according to the method, the molecular weight of a lactone polymer can be easily controlled, waste acid as a residual catalyst can be easily and completely removed, and coloring and impurity generation are reduced. The present invention relates to a method for producing a copolymer of a five-membered cyclic ether (A) and a lactone (B). The method is characterized in that a copolymerization reaction is performed at a temperature in the range of 10-50 DEG C, a heteropolyacid is used as a catalyst, an active hydrogen atom-containing compound containing a hydroxyl group, an amino group, and a mercapto group is used as a reaction initiator (C), and a three-membered to four-membered cyclic ether (D) is used.

Description

technical field [0001] The invention relates to a preparation method of a copolymer of five-membered ring cyclic ethers and lactones. Background technique [0002] Conventionally, it is known that cyclic ethers such as tetrahydrofuran (THF) are polymerized by cationic catalysts such as protonic acids, Lewis acids, and ionic complexes. In addition, it is known that lactones such as β-propiolactone and ε-caprolactone are easily polymerized by both cationic catalysts and anionic catalysts. Polymers such as polytetramethylene ether glycol and polycaprolactone glycol (polycaprolactone glycol) thus obtained are useful materials as soft segments of polyurethane resins and polyester resins. [0003] Polytetramethylene ether glycol uses polyether as the main chain, while lactone ring-opening polymers such as polycaprolactone diol use polyester as the main chain. Each has its own advantages and disadvantages that are opposite to each other. As a solution to make up for these mutual...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/664C08G63/78C08G18/42
CPCC08G63/08C08G63/664C08G63/78C08G18/4277C08G18/4291C08G65/06C08G65/331C08G18/4244C08G18/4269
Inventor 松本明洋青木良和佐藤刚
Owner HODOGAYA KAGAKU IND
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