Polyisobutylene

Detailed Product Description

 HRD Medium Molecular Poly-isobutylene (Food Grade)

Specifications & Technical Index

Grade	Volatile	StaudingerIndex	Viscosity Average Molecular Weight	Antioxidant	As, mg/kg (Calculated with As)	Heavy Metals, mg/kg (Calculated with pb)	Pb, mg/kg (Calculated with pb)
HRD-S350	≤0.3	21.5-26.0	35000±5000	No	≤3.0	≤20.0	≤3.0
HRD-S450	≤0.3	26.5-31.0	45000±5000	No	≤3.0	≤20.0	≤3.0
HRD-S550	≤0.3	31.5-36.0	55000±5000	No	≤3.0	≤20.0	≤3.0
HRD-S650	≤0.3	35.5-39.0	65000±5000	No	≤3.0	≤20.0	≤3.0

Physical and Chemical Properties:
Food grade poly-isobutylene is transparent and odorless semisolid.

Applications:
  1.Chewing Gums: Poly-isobutylene can improve the gum quality when mixed with wax paraffin wax and resin; it can also make the gum more flexible and stable, maintaining good hydrophobic property and excellent film-forming property.
Food Binding Agent: mixed with various adhesives (including pressure sensitive adhesive), poly-isobutylene has the functions of adhesive bonding and modification.
Poly-isobutylene has a hydrophobic property and can keep low-toxicity absorption and high-temperature stability when mixed with hydrophobic substances (CMC, pectin, gel). It also adjustable in hardness and has germ resistance.
Food Packing: Poly-isobutylene can be mixed with various paraffin waxes and high molecular polymers to serve as the releasing agent of packaging films, for example, polymer of poly-isobutylene and paraffin wax can be used as the packaging films for cheese. Poly-isobutylene can improve the low-temperature stability and water resistance of product.
  2.Food grade Hot Melt Adhesive: Poly-isobutylene has a function of plasticization, and can be used for thermal-plastic rubber, etc.
Medicine plaster: Food grade poly-isobutylene is now widely used in the field of medicine plaster. It has nice compatibility with both western medicines and traditional Chinese medicines because of its unique net structure long chain and macro molecule. With the properties, including non-irritability, repeated pulling and sticking, and non-hair collecting etc., food grade poly-isobutylene has developed into a leading material for medicine plasters.

    HRD Medium Molecular Polyisobutylene (Industrial Grade) 

TradeMark	Viscosity -average Molecular Weight(Mv)	Dynamic Viscosity (mPa.s)(20oC)	Dynamic Viscosity (mPa.s)(150oC)	Distribution of Molecular Weight(Mw/Mn)	VolatileMatter  (105,2h) Wt%
HRD-250	20000-30000	5.75X107-3.00X108	1.5X105-1.7X106	2.0-3.0	≤1.0
HRD-350	30000-40000	3.00X108-1.35X109	1.7X106-3.8X106
HRD-450	40000-50000	1.35X109-4.70X109	3.8X106-1.3X107
HRD-550	50000-55000	4.70X109-1.07X1010	1.3X107-2.35X107
HRD-600	55000-60000	1.07X1010-2.30X1010	2.35X107-4.5X107
HRD-650	60000-65000	2.30X1010-2.99X1010	4.5X107-5.16X107

Physical and Chemical Properties:
The product is a kind of yellowish transparent semi-solid substance, nontoxic and odorless. It has good chemical stability and resistance to heat, ozone, acid and alkali, UV ray, and weather, etc. It has high electric volume resistance, low expansion coefficient, no dielectric medium, excellent electrical insulation no residues after pyrolysis, and good compatibility with polyethylene and paraffin wax, etc. It is soluble in organic solvents such as gasoline and benzene etc., but not in water and alcohol type solvents, and has good shearing stability.

Main Applications:
1)Sealing Compound  2)Rubber Modification3)Paraffin Wax4)Printing ink5)Lubricant Grease