GB/T 24147-2009Waterborne ultraviolet curable resin - Water soluble unsaturated polyester acrylate resin (English PDF)

5.5 Water dilution stability

Dilute the sample with distilled water to that the content of non-volatile matter is about 3%; after the solution is standing for 5 minutes, visually observe whether there is flocculation and whether a uniform and transparent liquid can be formed.

5.6 Photo-curing time

5.6.1 Instruments and reagents

5.6.1.1 Balance: It shall be accurate to 0.001 g.

5.6.1.2 Wire rod coater: The size shall be 25, and the diameter of the corresponding winding wire shall be 0.25 mm.

5.6.1.3 1000 W UV lamp.

5.6.1.4 Coated art paper: 70 g/m²

5.6.1.5 Photoinitiator […]

5.6.2 Determination of the photo-curing time

take 5 g of resin solution and add a prescribed amount of photoinitiator to it. After stirring well, apply it on the coated art paper with a wire rod coater, irradiate at 10 cm vertically away from an ultraviolet lamp, and record the time consumed when the paint film is just dried; express the time in seconds (s). Judgment of paint film drying shall be carried out according to the first method in Chapter 3 of GB/T 1728-1979.

5.7 Content of volatile organic compounds (VOC)

The test shall be carried out according to the provisions of Appendix A and Appendix B in GB 18582-2008, and the test results shall be calculated according to A.7.2 in Appendix A.

6.1 Inspection classification

6.1.1 Product inspection is divided into factory inspection and type inspection.

6.1.2 The factory inspection items include appearance, pH value, non-volatile matter, viscosity, water dilution stability, and photo-curing time.

6.1.3 Type inspection items include all the technical requirements listed in this standard.

Under normal production conditions, the inspection shall be conducted at least once a […]