Difference between revisions of "Crosslinker"

From www.leather-dictionary.com - The Leather Dictionary
Jump to: navigation, search
m
m
Line 14: Line 14:
  
 
==Other top coat additives==
 
==Other top coat additives==
In addition to the crosslinkers, there are much more additives for the Top Coat. Some additives change the [[haptic evaluation of leather surfaces]]. Additives influence if the leather feels more waxy, blunt or smooth.
+
In addition to the crosslinkers, there are much more additives for the Top Coat. Some additives change the [[haptic evaluation of leather surfaces]]. Additives can influence the grip of the leather. It can feel more waxy, rough or smooth.
  
  
 
==Spinn web effect by aziridine crosslinker==
 
==Spinn web effect by aziridine crosslinker==
In the first generations of aziridine-based crosslinkers, the so-called spider web effect occurred. The phenomenon is known from the previous century. The crosslinker reacted with time and became so hard that the surface [[leather damages|broke years later]] and a fracture pattern similar to that of a spider web arose. [[car leather#Jaguar|Jaguar]] and other British brands were affected. Nowadays, this problem is under control.
+
The first generations of aziridine-based crosslinkers resulted in the formation of the so-called spider web effect. The phenomenon is known from the previous century. The crosslinker reacted with time and became so hard that the surface [[leather damages|broke years later]] causing a fracture pattern similar to that of a spider web. [[car leather#Jaguar|Jaguar]] and other British brands were affected. Nowadays, this problem is under control.
  
  

Revision as of 10:10, 19 February 2017

LEATHER-DICTIONARY.jpg


Crosslinker as additive

The binders of the top coats and pigment leather paint are generally based on polyurethane. "Crosslinkers" are additives which are used in aqueous top coats and pigment paint based on polyurethane. The crosslinker "crosslinks" the polyurethane binders and thereby ensures the necessary fastness properties of the leather surface. By "cross-linking", the leather surfaces of pigmented leather it is more resistant to abrasion, moisture or solvents.

Isocyanate crosslinkers have proven particularly effective in demanding surfaces such as automotive leathers. Isocyanate crosslinkers do not turn yellow and are also very resistant to aging. To this end, isocyanate crosslinkers are easy to use and are not harmful to health or the environment after processing.

Aziridine crosslinkers are common in furniture leather.

Crosslinkers generally contain organic solvents. These are necessary in order to achieve sufficient mixing with the substance to be cross-linked. The manufacturers of crosslinkers are trying to reduce this solvent proportion to zero.

Other top coat additives

In addition to the crosslinkers, there are much more additives for the Top Coat. Some additives change the haptic evaluation of leather surfaces. Additives can influence the grip of the leather. It can feel more waxy, rough or smooth.


Spinn web effect by aziridine crosslinker

The first generations of aziridine-based crosslinkers resulted in the formation of the so-called spider web effect. The phenomenon is known from the previous century. The crosslinker reacted with time and became so hard that the surface broke years later causing a fracture pattern similar to that of a spider web. Jaguar and other British brands were affected. Nowadays, this problem is under control.


Aziridin-Vernetzer-02.jpg

Aziridin-Vernetzer-01.jpg Aziridin-Vernetzer-05.jpg

Cracking of the surface due to excessive crosslinking of the aziridine crosslinker.

 



Additional information


Colourlock-GB-03.jpg

WE UNDERSTAND LEATHER - WWW.COLOURLOCK.COM