SH-2050粘合剂是一种中低剥离强度的加成型固化有机硅压敏胶，具有低迁移性、耐高温爬升、粘接力稳定、耐湿、耐热和耐候性好等特点。在使用过程中可以快速固化，比传统的固化方式更节省能源，固化过程中无低分子物质析出，流平性好，薄层涂布的胶面透明度高，电气绝缘性优良。可用于需要控制附着力的胶带工业保护膜。它对玻璃、金属面板、显示屏等各种目标材料表现出优良的浸润性能。主要应用在要求保护胶带/薄膜中需要较高附着性和良好润湿性能的场所。

二、主要技术指标

项目	指标
外观	无色透明黏稠液体
固含量（150℃, 2h）/%	60±2
粘度（25℃）/cp	60000~80000
剥离力(gf/25mm)	30-60^[¹^]

[1]此剥离力是在36umPET+15um干胶的条件下测试的结果。

三、使用参考

本粘合剂可直接或者与其它压敏胶混合后涂敷在衬底材料上，通常与交联剂和催化剂配合使用。为了提高与基材的粘结强度，可使用附着力添加剂。但是，在具有涂层的基材上对底漆进行电晕处理是获得良好固着性能的适宜选择。本产品可以采用相容的溶剂如甲苯、二甲苯等进一步稀释。在使用溶剂时，应确保通风良好。在准备涂布液时，推荐使用以下比例：

SH-2050主剂：交联剂 CL32：锚固剂AP810：催化剂 CAT05 = 100:0.6~1.5： 0.8~1.2:0.8~1.2

配胶：根据事先确定的配比，先将 SH-2050可单独使用也可与其他剥离力的有机硅压敏胶（如有需要）加入搅拌桶中，然后加入稀释剂（一般稀释至固含量在 25%～35%），搅拌 20～40min，待充分混合均匀后，加入交联剂 CL32，搅拌 3～5min；再加入催化剂CAT05，搅拌均匀后（一般为30min左右即可涂覆。配比后涂布液粘度寿命因涂布液浓度、溶剂、特定配方和环境温度不同而有差异。通常情况下，涂布液寿命为6小时。

固化：按上述配方制备涂布液并涂在柔性基材上，在超过 130℃ 以上的连续式涂敷烘箱中通风固化 2~5 分钟。气流形式、风量以及速度都将对压敏胶的固化速度产生影响。

注意：

1、胶料中有挥发性溶剂，使用时务必保证环境通风良好，并远离火种及高温；

2、使用中佩戴好防护用品，避免与皮肤接触，一旦接触皮肤后应及时用肥皂、流动清水冲洗干净；

3、涂布必须在适合的环境下进行，建议操作间采用无尘处理、温度控制在25-35℃，湿度控制在 15%～60%。粉尘过多会导致涂布成品有颗粒污点、不良率上升。温度过低会致使流平不佳、附着力下降。湿度过高易造成涂膜缩孔，湿度过低易造成静电安全隐患，出现表面泛白现象。

四、包装及贮运

建议本品在通风良好处低温（0℃-30℃）贮存，避光。产品有效贮存期 6 个月，超期复验，若符合标准，仍可使用；常规包装 20Kg/桶或200Kg/桶，可根据用户需求协商指定包装。本品按危险品贮存和运输。

SH-2050 Silicone Adhesive

Ⅰ. Product Description

SH-2050 is an addition-cure silicone pressure-sensitive adhesive (PSA) with low-to-medium peel strength. It features low migration, high-temperature creep resistance, stable adhesion, excellent moisture, heat, and weather resistance. During using, it cures fast, therefore, thereby saving more energy compared to conventional curing methods, and releases no low-molecular-weight substances. It also exhibits properties like good leveling performance, high transparency and excellent electrical insulation of the thin-coated adhesive layer. It is suitable for use in tapes and industrial protective films that needs adhesion control. This adhesive possesses good wetting properties on, such as glass, metal panels, display screens, etc. And it is mainly used in protective tapes or films where relatively high adhesion and good wetting performance are required.

Ⅱ. Technical Data

Item	Index
Appearance	Colorless transparent viscous liquid
Solid Content (150℃, 2h, %)	60±2
Viscosity (25℃, cp)	60000~80000
Peel Force (gf/25mm)	30~60^[1]
[1]: This result is tested under the condition of 36 μm PET + 15 μm dry adhesive.

Ⅲ. How to Use
Usually combined with a crosslinker and a catalyst, this adhesive can be applied directly to the substrate or mix it with other pressure-sensitive adhesives first. To improve its bonding to the substrate, adhesion-promoter is suggested. However, corona treatment to a coated substrate is the best option to obtain good adhesion properties. This product can be further diluted with compatible solvents such as toluene, xylene, etc. Therefore, good ventilation should be ensured when using the solvent. For preparing the coating solution, usage ratio below is recommended:

base component (SH-2050): crosslinker (CL32): anchoring agent (AP810): catalyst (CAT05) =100 : 0.6~1.5 : 0.8~1.2 : 0.8~1.2

Coating preparation: According to predetermined ration, firstly, add SH-2050 (or together with other pressure-sensitive adhesives of different peeling forces if necessary) into the mixing drum；secondly, add thinner (generally diluted to a solid content of 25%~35%), stir for 20~40min till the mixture is homogeneous; thirdly, add crosslinking agent CL32 and stir for 3~5min; then add catalyst CAT05, stir well (generally about 30min) till the mixture is ready for coating. The viscosity pot life of the prepared coating solution may vary significantly based on factors such as coating concentration, solvent, specific formulation, and ambient temperature. The typical pot life is 6 hours.

Curing: Prepare the coating solution according to the formula above, and apply it to the flexible substrate；and then cure it with ventilation for 2~5 minutes in a continuous coating oven above 130°C. Airflow pattern, air volume, and velocity may all have an impact on the curing speed of the adhesive.

Note:

1. Due to volatile solvents in the adhesive material, it is necessary to ensure a well ventilated operating environment, also away from fire and high temperature.

2. Wear protective equipment. In case of skin contact, rinse with soap and running water immediately.

3. Coating must be carried out in a proper environment. It is recommended that the operation room must be dust-free, with temperature controlled at 25°C~35°C and humidity 15%~60%. Excessive dust will lead to particle stains on the finished coating product and increase its defect rate. Too low a temperature may result in poor leveling and reduced adhesion. Excessive humidity may easily cause shrinkage of the coating film, while too low may cause electrostatic hazards and surface whitening.

Ⅳ. Packaging and Storage

It is recommended that this product be stored in a well-ventilated place away from sunlight at 0°C~30°C. The shelf life is 6 months. Re-test the product if exceeding the stated shelf life, and it may still be used if it meets the standard as well. Standard packaging is 20kg/drum or 200kg/drum, or can be customized as per customer request. Store and transport as hazardous goods.

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