Products

Cross-linkers and curing agents

CROSS-LINKERS & CURING AGENTS FOR WATERBORNE RESINS

Cross-linkers and curing agents improve durability and weathering of the cured film by increasing film cohesion and surface and interlayer adhesion. As a consequence, chemical, impact and scratch resistances are modified.

HOW TO FIND MY PRODUCT?

The key selection criterion is chemical reactivity. Some selectable combinations:

Target groups	Cross-linkers
Hydroxyls R-OH	Hydrophilic isocyanates R”-N=C=O
Amines R-NH-R’	Blocked isocyanates R”-N-(C=O)-BL
Carboxyls R-COOH	Modified ureas O=CH-CH=O
Carbonyls R-CHO	Melamines C3N3(NH2)3
Sulfhydryls R-SH	Aziridines R”-NC2H4
	Carbodiimides R”-N=C=N-R’
	Oxazolines R”-C3H4NO
	Hydrazides R”-CONH-NH2

Other aspects to consider:

- Performance benefits: relevant resistences for the final use. Stability/cleavage conditions of the new link.
- Formulation and practical curing condition: dosage, spontaneous vs triggered reactions, pot lives.

[solvent-free & solvent borne]

Reactivity

curing conditions

System

[pot life]

Product

GHS label

H phrases

UN nº

[ADR]

R-OH, R-NH-R’

waterborne resins

room T curing

[> 20ºC]

2K

post addition

[1-6 hr]

cross-linker HI100a

[solvent-free, anionic]

% NCO: 20,5 %

free NCO < 0,25%

H317
H332
H335
H412

Non-hazardous
for transport

cross-linker HI100n

[solvent-free, non-ionic]

% NCO: 18,0 %

free NCO < 0,1%

H317
H332
H335
H412

Non-hazardous
for transport

cross-linker HI070a

[solvent-borne 70%, anionic]

%NCO: 13,0%

free NCO < 0,25%

H317
H332
H335
H412

Non-hazardous
for transport

cross-linker HI070n

[solvent-borne 70%, non-ionic]

%NCO: 12,0%

free NCO < 0,1%

H317
H319
H332
H335

Non-hazardous
for transport

[waterborne & solvent-borne]

Reactivity curing conditions	System [pot life]	Product	GHS label	H phrases	UN nº [ADR]
R-OH, R-NH-R’ waterborne resins heat curing [> 90ºC]	1K one-pot	cross-linker BI090s [low curing T: 90ºC] [solvent-borne, non-ionic]	No labels	No phrases	Non-hazardous for transport
		cross-linker BI110 [standard curing T: 120-130ºC] [waterborne, non-ionic]	No labels	No phrases	Non-hazardous for transport
		cross-linker BI160 [high curing T: 160ºC] [waterborne, cationic]	No labels	No phrases	Non-hazardous for transport