about BASF's ChemCycling® approach
Global
Rubber Additives
Koresin®
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
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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
Find further information
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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.