Viscosity index/(ml/g)

K-value

Average degree of polymerization

                                                                             100~120

                                                                                    66

900~1650

Standard paste viscosity(Brookfield viscosity)/Pa.s

3.0~6.0

Apparent  density / (g/cm3) 

0.30~0.45

Grade

Excellent grade

Class-A product

Qualified product

Number of impurity particles

12

20

40

Volatile component/%≤ 

0.35

0.40

0.50

Sieve residue /%

250μm sieve size ≤

0

0.1

0.2

63μm sieve size ≤

0.1

1.0

3.0

Paste thickening rate (24h)/%  ≤

100

100

—

Whiteness (160℃,10min)/%  ≥

80

76

—

Scraper fineness/μm ≤

100

—

—

VCM residue /(μg/g)≤

5

5

10