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High Performance Tackifier for the Rubber Industry

Part of BASF's rubber chemicals portfolio is the tackifier Koresin®. It is the industry benchmark with regard to superior tack performance, processing flexibility, reliability, high quality and uniformity.

Koresin® is successfully applied in the manufacturing of quality and premium tires in OEM, replacement and re-treading as well as industrial and technical rubber goods.

Our customers benefit from our expertise with Koresin® which extends back more than 80 years. They also benefit from the outstanding advantages of Koresin®: It provides high initial and long-term tackiness to rubber compounds and it is compatible with all current rubber formulations. Koresin® allows adjustment of tackiness according to the processing needs, thus delivering reliable tack at all desired levels.

Koresin® is available worldwide through BASF or its partners. 

Koresin® is now available in two variants for advanced sustainability

Using the ChemCycling® approach

Koresin® Ccycled®

  • Using recycled feedstock from plastic waste
  • 100% substitution of fossil with sustainably certified recycled feedstock in the value chain
  • Contribution to saving of finite fossil resources
  • Drop-in solution: identical quality and properites compared to standard Koresin®
  • Manufactured in a certified mass balance approach
Using the Biomass Balance approach

Koresin® BMBcert™

  • Using renewable feedstock
  • 100% substitution of fossil with renewable raw materials in the value chain
  • Contribution to saving CO2 emissions
  • Drop-in solution: identical quality and properties compared to standard Koresin®
  • Manufactured in a certified mass balance approach
Interview BASF Koresin Sustainability

Michael Limbach, Sales BASF, and Colin Clarke, Sales Schill+Seilacher (BASF's technical distribution partner for Koresin®) explain Koresin® Ccycled® and Koresin® BMBcert™ in an interview with industry magazine "TyreTrends". © TyreTrends 2023

Koresin® is successfully applied
in the manufacturing of

quality and premium tires of all kind

  • for cars, trucks and special vehicles
  • for OEM, replacement and re-treading
  • in light, medium, heavy and speed use operations
  • in earth and air transport rubber compounds

other industrial and technical rubber goods, such as

  • conveyor belts
  • power transmission belts
  • hoses
  • cable / roll coverings
  • lining materials

Outstanding Advantages

  • High initial and long-term tackiness of rubber compounds
  • Compatible with all current rubber formulations 
  • Processing flexibility
     - degree of tackiness can be adjusted
     - tackiness can be maintained for up to several weeks
        when needed
  • Koresin has no negative influence on the
     - vulcanization kinetics
     - properties of the vulcanized rubber
  • Proven effectiveness also in formulations with high loading of silica filler

Test Criteria Specification Test Method
Ubbelohde dropping point 140 – 160 °C DIN 51801
Ring and ball softening point 135 – 150 °C DIN 52011
Solubility in hydrocarbons soluble BASF method
Physical form yellow to brown pellets & powder
Odor almost odorless
Softening point (ball and ring/DIN 52011)            135 – 150 °C
Dropping point (Ubbelohde/DIN 51801) 140 – 160 °C
Density (20 °C) 1.02 – 1.04 g/cm3
Solubility soluble in hydrocarbons

Trust in Superior Tackiness

The tackiness curves of various tackifiers identify Koresin® as the superior short- and long-term tackifier. Similar results have been observed e.g. for steel cord (100% NR) and side wall compounds (NR:BR:EPDM 35:35:30).

Koresin® customers round the world have for years confirmed the superior tackiness performance in all kinds of tires and rubber articles.


Influence on Vulcanization

Another major advantage of Koresin® compared to other tackifiers: Koresin® has hardly any impact on the vulcanization behavior of the rubber mixes. In particular, the essential scorch time remains virtually unaffected if you add Koresin®. Users therefore enjoy improved process reliability. The positive cure behavior of Koresin® can be verified at various dosages of Koresin® and in different polymer systems.


Innovation in Logistics to Meet Most Demanding Expectations

BASF produces Koresin at its Ludwigshafen plant. The production facility is linked to a pelletizing and packaging line that packs the pellets in 25-kilogram bags and bulk bags. Koresin production and filling operations have been certified in keeping with ISO 9001:2000. Our customers may order Koresin for delivery on plastic pallets. The carriers made of recycled plastics have been introduced in response to changes in customer demand: BASF uses the plastic pallets to meet the quality and reliability requirements of the tire and rubber industries.