ALPEX® CK 450/PAST

Principal: allnex Crosslinkers

Functions: Binder & Resin, Crosslinking Agent

Chemical Family: Polyisoprenes

Compatible Polymers & Resins: Alkyds

End Uses: Anti-Corrosion Paint, Chemical Resistant Paint, Letterpress Ink, Offset Ink, Screen Printing Ink, Tank Coating

View All Documents

Enhanced TDS

Identification & Functionality

Blend
No
CASE Ingredients Functions
Chemical Family
Function
Binder, Crosslinking Agent
Product Code
MITM15713
Single Ingredient
Yes
Technologies
Product Families

Features & Benefits

CASE Ingredients Features
Key Features
  • ALPEX® CK 450/PAST differs from ALPEX® CK 514 in having higher viscosity and lager compatibility with mineral oils.
  • ALPEX® CK 514 is less inclined to cause misting. It is the preferred product for addition to letterpress inks for high-speed printing machines.

Applications & Uses

Coating End Applications
Compatible Polymers & Resins
Ink & Toner End Applications
Markets
Applications
Product Applications

Paints:

Application and Drying of the Paints:

  • When paint systems are applied in several layers, each coat should be allowed to dry for about 1-2 days but not longer. After about 14 days, paints that are required to be highly resistant to chemicals will have through-hardened adequately.

Processing:

  • ALPEX® CK 450/PAST is fully compatible with the pigments normally used. When pigments containing iron, manganese, or lead compounds are used, particularly in the presence of dryers, the storage stability of the paints is adversely affected. The suitability of such pigments should therefore be checked separately in each case.
  • As a general principle, no dryers should be used in red-lead paints which contain ALPEX® CK 450/PAST.
  • As a rule, only small quantities of dryers need to be used in combinations of ALPEX® CK 450/PAST with alkyd resins, e.g., 0.02–0.03% Co metal, calculated on solid Alpex.

Antiskinning Agents:

  • ALPEX® CK 450 also is crosslinking by oxidation. Therefore, the addition of antiskinning agents like ADDITOL® XL 297, approx. 1.5% calculated on solids of ALPEX® CK 450, is recommended.
Processing Information

Printing Inks:

  • ALPEX® CK 450/PAST can be easily dissolved in mineral oils either by heating to about 180°C or by using a high-speed-solving process. The entertainment of air during mixing should be avoid to prevent changes in compatibility due to oxidation and consequent increases in viscosity. Blanketing with inert gas is recommended.

Properties

Physical Form
Product Properties

PAINTS:

ALPEX® CK 450/PAST is a synthetic resin based on cyclized rubber. Paints based on ALPEX® CK 450/PAST dry initially by the physical process of solvent evaporation. The originally reversible solubility of the films gradually diminishes through the action of oxygen. As sole binding agent ALPEX® CK 450/PAST is very brittle, and it is therefore normally used in conjunction with plasticizers, drying oils, and alkyd resins such as VIALKYD® AR 680. Four ALPEX® CK 450/PAST combinations have been particularly successful.

  a b c d
ALPEX® CK 450 (Solid Resin) 65-55 55-50 40-35 25-20
Plasticizer (Unsaponifiable) 35-45 40-35 25-20 15-10
Alkyd Resin (Solid) or Stand Oils   5-15 35-45 60-70

Regulatory & Compliance

Certifications & Compliance
Contains any chemicals listed on Prop 65 (including impurities, residues, catalysts, monomers, and by-products and excluding heavy metals)?

Packaging & Availability

Packaging Type

Principal Information

Group Principal Number
S000001
Principal

Storage & Handling

Storage Conditions

At temperatures up to 25 °C storage stability packed in original containers amounts to at least 365 days.

Other

Appearance (SDS)
pastille
Color (SDS)
Brown
Insoluble in (SDS)
Water
Item Number
Odor (SDS)
Slight
Other Hazards
Accumulation of fine dust may entail the risk of a dust explosion in the presence of air., By excessive exposure to dust, eye and respiratory tract irritation is possible.
Oxidizing Properties (SDS)
None
USA/DOT UN Number
Not Applicable
Optical Properties
ValueUnitsTest Method / Conditions
Color Scalemax. 12.0 GardnerGardner
Color Scalemax. 12.0 ASTMASTMDIN EN ISO 4630-1
Chemical Properties
ValueUnitsTest Method / Conditions
Iodine Valuemax. 60.0 mg I₂/100mgmg I₂/100mgDIN 6162 50% in Toluene
Shelf Life & Stability
ValueUnitsTest Method / Conditions
Shelf Life365.0 dd
Physical Properties
ValueUnitsTest Method / Conditions
Density1.0 g/cm³g/cm³DIN EN ISO 1183 solids
Melting Point127.0-145.0 °C°CCapillary Chromatography
Melting Point127.0-145.0 °C°CDIN 53181
Viscosity350.0-700.0 mPa.smPa.sDIN 53177 at 23°C, 50% toluene, ubbelohde
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Melting Point (SDS)122.0-138.0 °C°CDIN 53181
Specific Gravity (SDS)1.0-at 20°C