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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

AI Technical Summary

Problems solved by technology

Moreover, boron trifluoride-based, fuming sulfuric acid-based, fluorosulfuric acid and other catalyst systems have problems such as fluoridation treatment or a large amount of waste acid treatment in the subsequent treatment.

Method used

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  • Copolymer and method for producing polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] [Synthesis of THF-polycaprolactone copolymer]

[0061] Add 63.3 g (0.56 mol) of ε-caprolactone (B) to a 500 mL four-neck separable flask (50 mol % relative to the total number of moles of five-membered cyclic ether (A) and lactones (B) , manufactured by Tokyo Chemical Industry Co., Ltd.), THF (A) 40.0 g (0.56 mol, 50 mol % relative to the total number of moles of the five-membered cyclic ether (A) and lactones (B)), 1,4 -Butanediol (C) 1.7g (0.02 mol, 1.6 mol% relative to the total number of moles of the five-membered cyclic ether (A) and lactones (B), manufactured by Kishida Chemical Co., Ltd.), tungsten phospho Acid (catalyst) 0.6g (0.0003 mol, 0.02 mol% relative to the total number of moles of the five-membered ring cyclic ether (A) and lactones (B), manufactured by Nippon Shinkoku Co., Ltd.), and a thermometer, nitrogen gas Seals, stirring devices. After stirring at 25° C. for 15 minutes, 6.4 g (0.11 mol) of propylene oxide (D) was added thereto (10.0 mol % relati...

Embodiment 2

[0063] [Synthesis of THF-polycaprolactone copolymer]

[0064] Polymerization was carried out under the same conditions and operations as in Example 1, except that ε-caprolactone in Example 1 was changed to 37.7 g (0.33 mol) and THF was changed to 55.5 g (0.77 mol). Table 1 shows the combination ratio of each raw material, the reaction temperature / stirring time, and the yield, number average molecular weight (Mn) and color number of the obtained polymer.

Embodiment 3

[0066] [Synthesis of 3-methyl-THF-polycaprolactone copolymer]

[0067] Polymerization was carried out under the same conditions and operations as in Example 1, except that 40.0 g (0.56 mol) of THF in Example 1 was replaced with 48.2 g (0.56 mol) of 3-methyl-THF. Table 1 shows the combination ratio of each raw material, the reaction temperature / stirring time, and the yield, number average molecular weight (Mn) and color number of the obtained polymer.

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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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