CAB?美國(guó)伊士曼Eastman?531-1?(醋酸丁酸纖維素)重要物性參數(shù):?
Butyryl?Content???? |
50?wt?% |
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Acetyl?Content???? |
2.8?wt?% |
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Hydroxyl?Content???? |
1.7% |
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Viscosity??a?? |
5.6?poise |
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Color??b?? |
50?ppm |
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Haze??b?? |
15?ppm |
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Acidity???as?Acetic?Acid? |
0.02?wt?% |
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Ash?Content???? |
0.05% |
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Refractive?Index???? |
1.475? |
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Heat?Test???@?160°C?for?8?hr? |
Tan?melt? |
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Melting?Point???? |
135-150°C |
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g)???? |
115°C |
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Specific?Gravity???? |
1.17? |
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Wt/Vol???(Cast?Film)? |
1.17?kg/L?(9.75?lb/gal) |
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? |
480??3?(30??3?) |
||
? |
576??3?(36??3?) |
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Dielectric?Strength???? |
787-984?kv/cm?(2-2.5?kv/mil) |
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Molecular?Weight??c??n? |
40000? |
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Tukon?Hardness???? |
15?Knoops |
?
CAB?531-1?美國(guó)伊士曼?的作用:
1、?CAB加入金屬涂料中,可加速溶劑從漆膜中釋放,縮短觸干時(shí)間;
2、?CAB作為流平劑,可改善流平性,消除漆膜縮孔;
3、?CAB加入塑料涂料中,能增強(qiáng)耐磨性、顏色穩(wěn)定性,增加韌性;
4、?CAB在汽車底漆中加入CAB有助于溶劑揮發(fā)時(shí)更好的促使底漆的收縮.
5、?CAB在汽車修補(bǔ)漆體系中加入,能縮短干燥時(shí)間,提高抗冷裂性,并具有良好的拋光性能;
6、?CAB加入清漆后,能加強(qiáng)附著力、光澤性和保光性,使體系又有交聯(lián)特性又有干燥速度。