HRD Mid Molecular Weight Polyisobutylene (Industry- Grade)

[ Specifications & technical index ]
Grade
Item HRD-350 HRD-450 HRD-550 HRD-650
Viscosity Average Molecular Weight [MV ] 30,000-40,000 40,000-50,000 50,000-60,000 60,000-70,000
Specific Gravity (15/ 4 °C ) 0.92 0.92 0.92 0.92
Refractive Index ( N 20 /D ) 1.507 1.507 1.508 1.508
Flash Point COC ( °C ) 248 248 248 248
Appearance transparent and no foreign substances
Volatiles 105 °C 2h wt% ≤ 1.0 ≤ 1.0 ≤ 1.0 ≤ 1.0
Low Polymer 0.2 0.2 0.2 0.2
Pour Point ( °C ) 67.5 77.5 97.5 112.5
Penetration Degree ( 25 °C ) 150g × 5sec 225 173 139 124
100g × 5sec 182 138 110 96
Staudinger Index 26.5 27.5 32.5 34.5

Properties
Mid Molecular Weight Polyisobutylene is a kind of transparent,insipid,smellless,innoxious semi-solid. it stays stably with oxygen, ozone,acid,alkali,ultraviolet radiation and etc. Not dissolve in water, but gasoline and benzene.
Uses
1. Sealant: Polyisobutylene is the same with manufacture each kind of sealant to improve the products'flexility and penetrability.
2. Rubber: Polyisobutylene mixed with natural rubber and synthetic rubber ensures higher workability, addition of adhesion, and prevention of aging or cracking, improvement in resistance to water, electric insulation and resistance to ozone at normal and high temperatures.
3. Paraffin: Polyisobutylene mixed with paraffin can increase anti-draught ability and brittleness of paraffin , especially can improve the plasticity and anti-acid ability of the freezing food packaging.
4. Print Ink: Used as thickener and dispersant in polyethylene rotogravure print ink and add viscidity of print ink , prevent drying and splitting.
5. Lubricate Grease: Adding polyisobutylene to lubricate grease can improve the products' viscidity and ability of anti pressure.
6. Changing the character of macromolecule material,draught damp grease and etc.
Packing and Transportation
Non-hazardous chemicals, mid molecular weight polyisobutylene in 20kg carton with anti-adhesive paper or 45.4kg(100lbs) paper barrel.

Optional Information
- HS Code : 3902 Polymers of Propylene or of Other Olefins