Dynasylan® 6490

Identification & Functionality

Chemical Family

Organosilane

CASE Ingredients Functions

Adhesion Promoter,

Coupling Agent,

Crosslinking Agent,

Filler,

Surface Modifier

Plastics & Elastomers Functions

Adhesion Promoter,

Compatibilizer,

Coupling Agent,

Crosslinking Agent,

Moisture Scavenger

Technologies

CASE Ingredients,

Elastomers,

Plastics

Product Families

CASE Ingredients — Additives

Fillers & Extenders,

Functional Additives,

Surface Modifiers

Elastomers — Elastomer Additives

Catalysts, Initiators & Crosslinkers,

Performance Additives,

Surface Modifiers

CASE Ingredients — Monomers & Intermediates

Chain Extenders & Crosslinkers

Plastics — Polymer Additives

Catalysts, Initiators & Crosslinkers,

Performance Additives,

Surface Modifiers

Features & Benefits

Labeling Claims

Low VOC

CASE Ingredients Features

Abrasion Resistance,

Chemical Resistance,

High Flash Point,

High Impact Strength,

High Performance,

Low Viscosity

Materials Features

Abrasion Resistant,

Chemical Resistant,

Excellent Hydrophobic Properties,

Good Environmental Stress Crack Resistance (ESCR),

Good Impact Strength,

Good Processability,

High Boiling Point,

High Flash Point,

High Performance,

Improves Filler Dispersion,

Low Viscosity,

Reduces Moisture Uptake

Reactivity

• Dynasylan® 6490 is excellent as an adhesion promoter, dispersion and hydrophobation agent in mineral filled compounds.
• In the presence of moisture, the methoxy groups of Dynasylan® 6490 hydrolyse to produce methanol and reactive silanol groups.
• These silanol groups react with the filler via silicon- oxygen bridges. The vinyl functional groups of Dynasylan® 6490 react with the polymer phase in the presence of radicals.
• The high boiling point of Dynasylan® 6490, together with its high flash point, gives it outstanding advantages with respect to safety and handling during processing.
• From an environmental viewpoint it should be noted that the amount of released hydrolysis methanol (VOC) is significantly reduced compared to monomeric vinyl silanes.

Applications & Uses

Markets

Adhesives & Sealants,

Building & Construction,

Electrical & Electronics,

Paints & Coatings

Applications

Adhesives & Sealants — Building & Construction

Sealants & Caulks

Building & Construction — Building Materials

Pipes & Plumbing

Paints & Coatings — Industrial Coatings

Industrial Coatings

Electrical & Electronics — Wire & Cable

Jacketing & Insulation

Compatible Polymers & Resins

Ethylene Propylene Diene Monomer (EPDM),

Ethylene Vinyl Acetate (EVA),

High-Density Polyethylene (HDPE),

Polyethylenes (PE)

Plastics & Elastomers End Uses

Cables,

Pipes

Application Characteristics

• A major field of application for mineral-filled compounds is the cable industry.
• EPDM and EVA can be processed into highly filled cable compounds through the adhesion promoting and hydrophobising effect of Dynasylan® 6490.
• The EPDM and EVA polymers with Dynasylan® 6490 are for the halogen-free, non-toxic, environmentally-friendly flame retardant cable compounds (HFFR) based on ATH and MDH.
• In addition, Dynasylan® 6490 can be used in many other applications such as filler and pigment coating, dispersions etc. typical property improvements obtained by using Dynasylan® 6490 in filled polymers are:
  • improved filler dispersion.
  • good processability significantly.
  • reduced water-uptake.
  • excellent balance between tensile strength and elongation at break at a high level.
  • improved chemical resistance.
  • strongly reduced tendency to stress cracking.
  • higher impact strength.
  • higher abrasion resistance.

Properties

Physical Form

Liquid

Appearance

Colorless. low - viscous liquid

Odor

Nearly odorless

Technical Data

	Value	Units	Test Method / Conditions
Density (at 20°C)	approx. 1	g/cm³	DIN 51757
Boiling Point (at 1013 hPa)	min. 220	°C	ASTM D-1120
Dynamic Viscosity (at 20°C)	2 - 4	mPa.s	DIN 53015
Flash Point	approx. 87	°C	DIN EN ISO 2719 (Pensky-Martens, closed-cup)
Silica Content (as SiO₂)	approx. 54	% w/w	AN-SAA 0754

Regulatory & Compliance

Chemical Inventories

ECL (Korea),

EINECS (EU),

ELINCS (EU),

IECSC (China),

TSCA (USA)

Packaging & Availability

Packaging Type

Drums

Packaging Information

• Dynasylan® 6490 is supplied in 25 kg, 200 kg drums and 1.000 kg containers.
• The containers must remain tightly sealed and stored in a cool, well-ventilated place protected against moisture.

Storage & Handling

Shelf Life

12 months