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Polymer Additives

Rhenosin® RB

Technical DataSheet | Supplied by Lanxess

Phenol formaldehyde resin. Acts as a hardening agent. Contains no externally added hardeners. Significantly increases the hardness of vulcanizates. Tensile strength is slightly reduced and elongation at break increased by the hardener system. Modulus is also increased, except in SBR. It does not affect scorch and vulcanization characteristics. Compatible with NR, SBR, BR, NBR and EPDM. It is not suitable for use in CR. It increases mix viscosity in NR, SBR, BR, EPDM and decreases in NBR. Recommended for for hard and very hard vulcanizates such as apex compounds in radial tires, floor coverings, paper rollers, heels, soling sheets, oil-resistant seals, brake linings, solid hose material. The dosage rate is 5-25 phr. To be fully effective, approx. 10 % hardener (Rhenogran Hexa 80) should be added.

Rhenosin® RB Product details

Product Type
Chemical Composition
Physical Form
Yellowish to brownish
Product Status
Applications/ Recommended for
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Rhenosin® RB Properties


Value & Unit
Test Condition
Test Method
xxxx g/cm3
OH number (DIN 53240)
xxxxxxxxx mg KOH/g
Melting range, DIN 53181, ISO 3146
xxxxxxxx °C
Free phenol (DIN 16916-02-L2)
xxxxx %
Last edited May 11, 2017
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