Chiguard°GA403 Ultraviolet absorber 
Description
Chiguard® GA403 (GA403) is a new type of UV light shielding agent derived from vanillin. GA403 has a very high absorption rate in the UV-A band. Therefore, when 1500 ppm is added to a 1 mm thick PET film, GA403 can completely shield light with a wavelength below 405 nm. From the perspective of blue light absorption applications, this appropriate optical shielding property also reduces the impact of GA403 on the initial color, allowing the product to take into account both optical performance and appearance.

Chiguard?GA403 (GA403)is a UV blocker derived from vanillin,a renewable natural resource.It has a remarkably high absorption in the UV-A wavelength region,as shown in Figure 1.Therefore,at 1500 ppm loading in a1 mm

thick PET film,GA403 can block out UV light up to 405

nm,as shown in Figure 2,which indicates that GA403 will have a low impact on the initial color.

The most important property of GA403 is its insolubility in common food ingredients,and it has passed a PET

migration test in 10%ethanol,3%acetic acid,and vegeta- ble oil.The results are shown in Table 1.

However,the low solubility of GA403 does not affect its high compatibility with most commodity plastics like PET, PC,PA,PMMA,and PE.GA403 has extraordinary heat

stability as shown in Figure 3,which allows it to be used in plastics that are processed at over 300℃,such as PET, PC,and PA.Chiguard@380W is recommended for use

with GA403 to create a high-efficiency and broad-cover- age UV blocking system.

Applications

1.PET,PC,PMMA,PA,PE

2.UV/Blue light filter

3.Solar Window film

4.Transparent containers of UV-sensitive substances

Advantages

1.High UV absorption efficiency
2.Excellent thermal stability
3.Low color contribution
4.Non-migration in PET
5.Derived from natural resource

Physical property data

Figure 1.UV-VIS Absorbance spectrum Figure 2.Transmittance spectrum

Figure 3.Thermogravimetric Analysis (TGA)

Conditions: 1 .Under Air

2.Heat from 110℃ to 850℃ at 20°℃/min

3.Hold for 5 mins at850℃

Table 1.Migration Test Results

Tests were conducted in a foodsimulant at 60℃ for 10 days.

The results were analyzed by HPLC-UV

**Detection limit:50 ppb

Product catalogue