No Heavy Metals Low Voc Saturated Polyester Resin For Amino Baking Varnish

WL-187 Water Based Saturated Polyester Resin

Introduction

WL-187 is water based hydroxy-functional saturated polyester resin, it has good flexibility and chemical resistance, excellent versatility. It is usually used with amino crosslinkers (Cytec 325 and Cytec 303) for water-based amino baking varnish.

Physical Property

Viscosity *: after dilution with propylene glycol methylether (1:1)

Application Guide

◆ After WL-187 is neutralized with N, N-dimethylethanolamine( 5~6% of the resin), it can be directly diluted with water.

◆ Add methylated amino resin (20%-30% of the resin) for baking and curing. The baking temperature is above 120°C. The baking conditions and paint film properties are related to the amino resin used. When it used with the fully methylated amino resin, an acid catalyst (0.5-1% of the resin) must be added, and the baking temperature must be above 140°C.

Characteristics

WL-187 is a water-dilutable saturated polyester resin, which can be infinitely diluted with deionized water after neutralized, it can be stored stably under alkaline conditions, and will settle and stratify under acidic conditions, which is especially obvious when acidic pigments are added. Therefore, the diluted resin and finished paint should be stored under weak alkaline conditions. The pH can be adjusted using organic amines or ammonia. The viscosity of the emulsion increases with increasing pH.

The diluted emulsion has excellent shear stability and can directly participate in the grinding of pigment paste. Because the structural characteristics of the resin help the wetting of pigments and fillers. It is recommended not to add or add less wetting agent when the resin is involved in grinding.

WL-187 has excellent hardness and flexibility after cross-linking with amino resin, and can be widely used in coil and iron printing industries.

Storage Condition

Store the product in a cool and dry place, the recommended storage temperature is 0~40℃. The shelf life is one year. After the expiration date, if the test passed, it still can be used.

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Special Tips

This material is complied according to our existing technology and experience, the technical advice provided is sincere, but it is not guaranteed to be used in all samples and formulations, all the data are for users reference only.