셀룰로스, 부탄산 아세트산

한글명:셀룰로스, 부탄산 아세트산

카스 번호9004-36-8

상품명:Cellulose Acetate Butyrate

CBNumberCB4484697

분자식N/A

포뮬러 무게0

MOL 파일Mol file

동의어(한글)

셀룰로스,부탄산아세트산

셀룰로스,부탄산아세트산(CELLULOSE,ACETATEBUTANOATE)

셀룰로오스아세테이트부티레이트

화학적 성질

녹는점	127-240 °C
밀도	1.25 g/mL at 25 °C(lit.)
굴절률	n20/D 1.475(lit.)
저장 조건	2-8°C
용해도	물에 거의 녹지 않으며, 아세톤, 포름산 및 동량의 메탄올과 염화메틸렌 혼합물에 녹고, 에탄올(96%)에는 거의 녹지 않습니다.
물리적 상태	입상 결정성 분말
색상	하얀색
냄새	Odorless
Dielectric constant	3.2（Ambient）
EPA	Cellulose acetate butyrate (9004-36-8)

위험 및 안전 성명

안전지침서

22-24/25

WGK 독일

TSCA

TSCA listed

HS 번호

39129000

NFPA 704:

	1
1		0

그림문자(GHS)

셀룰로스, 부탄산 아세트산 화학적 특성, 용도, 생산

화학적 성질
white granular crystalline powder
용도
Contact lens material (hydrophobic).
Cellulose acetate butyrate is the most commonly used organic cel- lulose ester for coating applications.
정의
Cellulose acetate butyrate (CAB) is a cellulose ester where the hydroxyl groups attached to the glycoside rings in cellulose are partially or fully substituted by acetyl and butyryl groups. The ratio between acetyl and butyryl substitution can be varied in their synthesis, and somewhat different properties can be obtained. The total degree of substitution (DS) is regarded as a maximum of three; however, for a degree of polymerization (DP) of less than 134, a slightly higher DS can occur due to the end-group contribution. Both the DS and the molecular weight of cellulose esters can be altered, and both are reported to lead to a variation in material properties[1].
제조 방법
Cellulose acetate-butyrate (CAB) is prepared in a manner similar to that described previously for cellulose acetate. Esterification is carried out using a mixture of acetic anhydride and butyric anhydride with sulphuric acid as catalyst and then the product is slightly hydrolysed. Depending on the reaction conditions, various products may be obtained; commercial materials generally have about 1-2 butyryl groups per glucose residue.
공업 용도
Commonly called butyrate or CAB, it is somewhattougher and has lower moisture absorptionand a higher softening point than acetate.CAB is made by the esterification of cellulosewith acetic acid and butyric acid in the presenseof a catalyst. It is particularly valuedfor coatings, insulating types, varnishes, andlacquers.
Special formulations with good weatheringcharacteristics plus transparency are used foroutdoor applications such as signs, light globes,and lawn sprinklers. Clear sheets of butyrateare available for vacuum-forming applications.Other typical uses include transparent dial covers,television screen shields, tool handles, andtypewriter keys. Extruded pipe is used for electricconduits, pneumatic tubing, and low-pressurewaste lines. Cellulose acetate butyrate alsois used for cable coverings and coatings. It ismore soluble than cellulose acetate and moremiscible with gums. It forms durable and flexiblefilms. A liquid cellulose acetate butyrate isused for glossy lacquers, chemical-resistantfabric coatings, and wire-screen windows. Ittransmits ultraviolet light without yellowing orhazing and is weather-resistant.

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