Bermocoll ML 71 cellulose ether

Bermocoll

BERMOCOLL ML 71 is a low modified non-ionic, water soluble cellulose ether, intended as a water retaining and consistency improving additive to cement based mortars. BERMOCOLL ML 71 contains methyl, ethyl and hydroxyethyl substituents giving a unique balance between workability and strength.

 

Specifications

BERMOCOLL ML 71 is a modified high viscosity grade of methyl ethyl hydroxyethyl cellulose.

 

Physical data

Appearance: whitish powder

Particle size 98 % < 600 μm

Water content: max 5 %

 

Characteristics of aqueous solutions

pH (1 % solution): neutral

Surface activity: weak

Viscosity at 20°C

(Brookfield LV)

1 % solution: 6200 - 9200 mPa.s

 

Applications

BERMOCOLL ML 71 is used in cement-based tile fix and joint mortars for improvement of workability, consistency, water retention and adhesion. Normal dosage in mortar is 0.2 - 0.4 % calculated on the dry mortar weight. BERMOCOLL ML 71 counteracts slip tendency of tiles.

BERMOCOLL ML 71 is intended for dry mixing with other powder materials and should not be used for direct dissolving in water.

 

Packaging and Storage

BERMOCOLL ML 71 is packed in multiply paper bags with an inner polyethylene bag. Net weight 15 kg. We recommend emptying the bags from the bottom. The empty bags can be recycled or burned. In unopened bags, BERMOCOLL ML 71 can be stored for several years. In opened bags, the moisture content of BERMOCOLL ML 71 will be influenced by the air humidity.

 

At the temperatures above 250°C (480°F), charring of BERMOCOLL ML 71 will occur. At high

temperatures and in contact with an open flame, BERMOCOLL ML 71 will burn slowly with the characteristics of cellulose.