Film-forming resins and curing
Polyamide curing agents for epoxy resins
The mix ratio for a polyamide epoxy hardener depends on active hydrogen equivalent weight. Batch size and temperature also affect working time.
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Film-forming resins and curing
Aliphatic polyisocyanate hardeners
For two-component polyurethane, calculate mix ratio from available NCO and the polyol hydroxyl value. Similar solids do not imply equal equivalents.
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Dispersion, rheology and matting
HEUR associative thickeners
HEUR thickeners associate with latex and surfactants. Evaluate low-shear storage and high-shear application behavior together.
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Thickening, moisturization and emulsification
Carbomers
Carbomer grade, dispersion and post-neutralization viscosity govern gel behavior. A single viscosity value cannot establish grade equivalence.
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Warp sizing and desizing
Modified starches for textile warp sizing
Select modified warp-sizing starch by fiber type, sizing temperature and subsequent desizing. Viscosity alone cannot determine the grade.
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Warp sizing and desizing
Acrylic warp sizing agents
For acrylic warp sizes, specify solution or dispersion form and compatibility with starch and other sizes.
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Printing and finishing
Sodium alginate
For sodium alginate as a printing thickener, assess stock-paste viscosity, sensitivity to water quality and wash-off after printing.
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Printing and finishing
Acrylic pigment printing binders
In pigment printing, a binder forms a film on the fiber. Assess dry and wet crock fastness together with fabric handle.
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