Welan gum in cementing additive

Welan gum in cementing additive
1.grade
1). oil drilling grade(petroleum grade) xanthan gum.
2). special grade

2. property:
1)high viscosity under low rotation
2) high viscosity under low concentration
3 fine moisture retention
4)peculiar stability under high salinity
5)high temperature resistance

3. specifications: 

Appearance:	white to cream color powder
Odor	mild
pH:	7.0-9.0
Bulk density:	26.25 lbs./ ft3 (500-700kg/m3)
Specific Gravity:	1.45
Particle Size:	90% pass 80 mesh
Viscosity	0.66% in Dl water by Fann 35 at 70ºF	0.66% in Dl water by Fann 35 with 1.0 spring at 185ºF
300rpm	39-49	37-47
200rpm	33-43	32-42
100rpm	29-37	28-35
6rpm	> 17	> 17
3rpm	> 16	> 16

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4.storage: stored in a cool dry ventilated place
5.shelf life: 2 years at least if properly stored

6.Application:
Welan Gum is an anionic polysaccharide with excellent thermal stability and retention of 
viscosity at elevated temperatures. It is used in various industries where high molecular weight 
biopolymers are useful. Welan Gums have various oilfield applications, concrete, dry-mixed mortar,petroleum industry,foundry coating, pigment suspensions, cement or concrete viscosifiers, tire sealants and paint thickeners

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