Crosslinkers

Crosslinkers help to form a three-dimensional network and thereby improve material properties such as elasticity, strength and heat resistance.

Crosslinkers in the polymer industry are used to improve the material properties of polymers. Crosslinkers are typically used in EVA (ethylene vinyl acetate). The physical and mechanical stability of EVA can be increased by adding crosslinkers during the manufacturing process. In detail, crosslinkers have a positive influence on the strength, hardness and dimensional stability of EVA.

Crosslinkers in the rubber industry are used to form three-dimensional networks. The crosslinkers, which are usually sulfur-based, form sulfide bridges between the polymer chains of the rubber, thereby improving the mechanical properties. The degree of cross-linking affects the properties of the rubber (e.g. hardness, toughness and melting point).

Crosslinkers of the LUBIO^® Sulfosafe series can significantly improve the mechanical properties of polymers through the formation of disulfide bridges.

All crosslinkers for the polymer industry at a glance:

wdt_ID	LUBIO^®	Active Ingredient	Form	PET	PBT	PLA	PBAT	PC	EVA	PU/TPU	PA	PVC
1	Sulfosafe 1	Disulfide Derivative	S						✓
3	Sulfosafe 2	Disulfide Derivative Zn Clusters	S						✓
			Form	PET	PBT	PLA	PBAT	PC	EVA	PU/TPU	PA	PVC

Crosslinkers of the LUBIO^® Sulfosafe series can be used in combination with LUBIO^® NCL 1 in order to produce heat-resistant vulcanizates, e.g. on EPDM, NR, SBR or NBR.

All crosslinkers for the rubber industry at a glance:

wdt_ID	LUBIO^®	Active Ingredient	Form	Applications	Dosage [wt%]	Sulfur [%]	Melting range [°C]
1	Sulfosafe 1	Sulfur compound	S	Elastomere, z.B. EPDM, NR, SBR, NBR	1,5 – 3,5	23	> 110
3	Sulfosafe 2	Sulfur zinc compound	S	Elastomere, z.B. EPDM, NR, SBR, NBR, CR	1,5 – 3,5	18	> 60
			Form	Applications	Dosage [wt%]	Sulfur [%]	Melting range [°C]

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Crosslinkers based on sulfur play a central role in polymer chemistry and the rubber industry in the production of polymer materials with customized properties. During the vulcanization process of rubber, these crosslinkers are used to enable the formation of disulfide bonds between the polymer chains. This leads to the formation of a three-dimensional network structure, which improves material properties such as elasticity, strength and heat resistance. In addition, sulfur-based crosslinkers are also used in other polymers such as ethylene vinyl acetate (EVA) to optimize their physical and mechanical properties. The precise dosage and selection of crosslinkers is made according to the specific requirements of the application to ensure optimum performance of the polymer materials.

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