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فروش عمده مواد اولیه صنعت رنگ خودرویی
کب 20-381 CAB
Chlorinated Polyolefin) CPO 343-3 50% Eastman)
مشخصات فنی در ذیل آمده است.
سلولز استات بوتیرات
381-20 CAB
CAB 551-0.2
CAB 381-2
CAB 381-0.5
CAB 351-1
CAB 381-0.1

Eastman Cellulose acetate butyrate（CAB－381-20）
Eastman Cellulose acetate butyrate（CAB－381-2) is a cellulose ester with high butyryl content and high viscosity.Except high viscosity and high molecular weight,the other properties of this cellulose ester are the same with CAB－381－0.1 and CAB-381-0.5.The combination properties of CAB － 381－2 are better,such as good dissolubility,compatibility,water resistance,surface hardness and film strength. It can be supplied as free-pouring powder.According to the regulations issued by FDA,Eastman Cellulose acetate butyrate（CAB－ 381－2) is allowed to be used in some products in contact with foodstuffs.

Technical data：
Propetya Test methodb Typical number，unitc
Butyryl content 　 38%（weight）
Acetyl content 　 13.5%（weight）
Hydroxyl content 　 0.013
Viscosityd 　 2 s/ 7.6 ps
Colore 　 125 ppm
Optical hazef 　 35 ppm
Acidity，(calculated based on ethanoic acid) 　 0.03 wt % max.
Ash content 　 0.05%
Refractive index 　 1.475
Heat resistant test ＠160℃，8 h 　 Tanning melting
Melting point 　 171-184℃ (340-363℉)
Specific gravity 　 1.2
Weight/Volume proportion（cast film） 　 1.2 kg/L (10 lb/gal)
Stacking density 　 　
Casting 　 352 kg/m3 (22 lb/ft3)
Diffluence 　 465kg/m3　（39　lb/ft3 )
Dielectric strength 　 787-984 kv/cm(2-2.5kv/mil)
Glass transition temperature（Tg） 　 133-271℃
Molecular weight ,Mn f 　 20000

Matters Need Attention:
a: All tests should be conducted at the temperature of 23℃（73℉）and relative humidity of 50% unless otherwise stated.
b: According to the solution described by method D1343 formula A of ASTM and method D817 of ASTM to measure viscosity.The viscosity unit equivalent value is poise replaced by ASTM second in method D817 of ASTM.
c: Cellulose ester dissolve in MIBK to measure color and optical haze.Using Pt-Co color standard and optical haze standard of Johns-Manville diatomite(diatomite products).
d: Using Gel permeation chromatography to measure average molecular weight of polystyrene equivalent weight.
e: Cellulose ester dissolve in MIBK to measure color and optical haze.Using Pt-Co color standard and optical haze standard of Johns –Manville diatomite(diatomite products).
f: Using Gel permeation chromatography to measure average molecular weight of polystyrene equivalent weight.
Note: Above properties are general goods standard value,Eastman does not declare any specific goods should keep in exact accordance with above numbers.
Storage: It must be stored in a cool,dry and ventilated place,protected from direct sunlight,and strictly sealed after using.
Package：20 kg /paper bag.

Place of origin：U.S.Eastman