Cellulose derivative, thermoformed material, molded body, production method therefor, and casing for electrical and electronic equipment

Abstract

A thermo-molding material contains a water-insoluble cellulose derivative, wherein the water-insoluble cellulose derivative comprises: A) a hydrocarbon group; B) a group containing an acyl group: -CO-R B1 and an alkyleneoxy group: -R B2 -O- (R B1 represents a hydrocarbon group, and R B2 represents an alkylene group having 3 carbon atoms); and C) an acyl group: -CO-R C (R C represents a hydrocarbon group).

Description

technical field

[0001] The present invention relates to cellulose derivatives, thermoforming materials, moldings and methods for their preparation, and housings for electrical and electronic equipment. Background technique

[0002] In components constituting electric and electronic equipment such as copiers and printers, various materials are used in consideration of the characteristics and functions required for the components. For example, for elements (housing) that play a role in accommodating and protecting the driving device of electric equipment and electronic equipment, etc., a large amount of PC (polycarbonate), ABS (acrylonitrile-butadiene- Styrene) resin, PC / ABS, etc. (Patent Document 1). These resins are prepared by reacting compounds obtained using petroleum as a raw material.

[0003] In addition, fossil resources such as petroleum, coal, and natural gas include, as a main component, carbon that is fixed underground for a long period of time. In the case whe...

Examples

preparation example Construction

[0142] 2. Preparation method of cellulose derivatives

[0143] The production method of the cellulose derivative in the present invention is not particularly limited, and the cellulose derivative of the present invention can be produced by using cellulose as a raw material and performing etherification and esterification of the cellulose. Any cellulosic source can be used including, for example, cotton, linters, pulp, and the like.

[0144] A preferred embodiment of the production method of the cellulose derivative in the present invention is carried out by a method comprising: reacting hydroxypropyl cellulose ether having a hydrocarbon group and a hydroxypropyl group with an acid chloride or an acid anhydride to perform esterification ( acylation) process.

[0145] In addition, as another embodiment, a method comprising a process of etherification of cellulose such as methyl cellulose and ethyl cellulose with propylene oxide or the like, or making alkyl chlorides such as met...

Embodiment

[0215] Although the present invention will be described in detail with reference to the following examples and comparative examples, the scope of the present invention is not limited to the following examples.

Synthetic example 1

[0216]

[0217]30 g of hydroxypropylmethylcellulose (trade name: Marpolose 60MP-4000; manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.; H-1) and 2,250 mL of N,N-dimethylacetamide were weighed and juxtaposed into a 5-liter three-necked flask equipped with a mechanical stirrer, a thermometer, a cooling tube, and a dropping funnel, followed by stirring at room temperature. After confirming that the reaction system became transparent and completely dissolved, 84 mL of acetyl chloride was slowly added dropwise, and then the temperature of the system was increased to 80°C to 90°C. Stirring was continued for 3 hours, after which time the reaction was cooled to room temperature. The reaction solution was added to 10 L of water while vigorously stirring, whereby a white solid was precipitated. The white solid was isolated by suction filtration and washed three times with copious amounts of water. The obtained white solid was dried under vacuum at 100° C. for 6 hours to obtain the ...

technical field

[0001] The present invention relates to cellulose derivatives, thermoforming materials, moldings and methods for their preparation, and housings for electrical and electronic equipment. Background technique

[0002] In components constituting electric and electronic equipment such as copiers and printers, various materials are used in consideration of the characteristics and functions required for the components. For example, for elements (housing) that play a role in accommodating and protecting the driving device of electric equipment and electronic equipment, etc., a large amount of PC (polycarbonate), ABS (acrylonitrile-butadiene- Styrene) resin, PC / ABS, etc. (Patent Document 1). These resins are prepared by reacting compounds obtained using petroleum as a raw material.

[0003] In addition, fossil resources such as petroleum, coal, and natural gas include, as a main component, carbon that is fixed underground for a long period of time. In the case whe...

Examples

preparation example Construction

[0142] 2. Preparation method of cellulose derivatives

[0143] The production method of the cellulose derivative in the present invention is not particularly limited, and the cellulose derivative of the present invention can be produced by using cellulose as a raw material and performing etherification and esterification of the cellulose. Any cellulosic source can be used including, for example, cotton, linters, pulp, and the like.

[0144] A preferred embodiment of the production method of the cellulose derivative in the present invention is carried out by a method comprising: reacting hydroxypropyl cellulose ether having a hydrocarbon group and a hydroxypropyl group with an acid chloride or an acid anhydride to perform esterification ( acylation) process.

[0145] In addition, as another embodiment, a method comprising a process of etherification of cellulose such as methyl cellulose and ethyl cellulose with propylene oxide or the like, or making alkyl chlorides such as met...

Embodiment

[0215] Although the present invention will be described in detail with reference to the following examples and comparative examples, the scope of the present invention is not limited to the following examples.

Synthetic example 1

[0216]

[0217]30 g of hydroxypropylmethylcellulose (trade name: Marpolose 60MP-4000; manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.; H-1) and 2,250 mL of N,N-dimethylacetamide were weighed and juxtaposed into a 5-liter three-necked flask equipped with a mechanical stirrer, a thermometer, a cooling tube, and a dropping funnel, followed by stirring at room temperature. After confirming that the reaction system became transparent and completely dissolved, 84 mL of acetyl chloride was slowly added dropwise, and then the temperature of the system was increased to 80°C to 90°C. Stirring was continued for 3 hours, after which time the reaction was cooled to room temperature. The reaction solution was added to 10 L of water while vigorously stirring, whereby a white solid was precipitated. The white solid was isolated by suction filtration and washed three times with copious amounts of water. The obtained white solid was dried under vacuum at 100° C. for 6 hours to obtain the ...

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