Bermocoll CCA 425 cellulose ether

Bermocoll

BERMOCOLL CCA 425 is a modified non-ionic, water soluble cellulose ether, intended as a water retaining and consistency improving additive to cement and gypsum based mortars.

 

Specifications

BERMOCOLL CCA 425 is a modified high viscosity grade of ethyl hydroxyethyl cellulose.

 

Physical data

Appearance: whitish powder

Particle size: 98 % <300 μm

Water content: max 4 %

 

Characteristics of aqueous solutions

Surface activity: weak

Viscosity at 20°C

(Brookfield LV)

1 % solution: 6,500 - 8,500 mPa.s

 

Applications

BERMOCOLL CCA 425 is used in cement and gypsum based mortars for improvement of

workability, consistency and water retention, leading to a prolongation of the open time.

CCA 425 effectively counteracts the sagging tendency of plaster.

 

BERMOCOLL CCA 425 should be admixed in dry form before the water is added. Normal dosage is 0.2 - 0.7 % depending on type of mortar. Due to its small particle size BERMOCOLL CCA 425 will dissolve rapidly after addition of water to the dry mix.

 

Packaging and Storage

BERMOCOLL CCA 425 is packed in multi-ply paper bags with an inner polyethylene bag. Net

weight 20 kg (approx 44 lbs). We recommend emptying the bags from the bottom. The empty

bags can be recycled or burned. In unopened bags, BERMOCOLL CCA 425 can be stored for

several years. In opened bags, the moisture content of BERMOCOLL CCA 425 will be

influenced by the air humidity.

 

At the temperatures above 250°C (480°F), charring of BERMOCOLL CCA 425 will occur. At high temperatures and in contact with an open flame, BERMOCOLL CCA 425 will burn slowly with the characteristics of cellulose.