图片名称

产品中心

+
  • 922A.jpg
  • 微信图片_20230826175249.jpg

SH-922A有机硅胶粘剂

耐火云母带、高温压敏胶带的制作、玻纤布粘接云母纸。

所属分类:

有机硅胶黏剂


在线咨询

产品描述

SH-922A有机硅胶粘剂

一、性能特点

922A系列有机硅胶粘剂是以聚硅氧烷生胶和树脂为基料,再添加助剂的甲苯溶液。具有较高耐热性,柔软性和较好绝缘防潮性,适用于耐火云母带、压敏胶带的粘接。低烟、稳定性好、耐高温、不析碳,具有较好的耐候性、耐潮湿性、电绝缘性

  • 主要技术指标

项          目

指      标

外         观

无色或淡黄色均匀液体,允许有乳白光,无机械杂质

固体含量(150℃,2h,%)       

60±2

密  度(25℃,g/cm3)

1.0±0.02

粘度(25℃,cp)        

10000~800001

注:1可按客户要求进行定制

应用说明

 本产品为双组份,可用过氧化物BPO或本公司专用固化剂固化;

 由于基材、涂敷设备、固化周期和所需特性等因素的不同,固化剂的加入量为胶水量的1.52.5%。为了保证固化剂和胶粘剂的良好混合,首先将其完全溶解于溶剂然后再加入到胶液,搅拌混匀。同时,在涂布上机前应再用180目以上的滤网过滤一次,以防止机械杂质的混入

 使用固化剂可以加快固化速度或允许在低温下固化,还可以提高粘合剂的内聚强度,提高其在基材上的附着性能。混合配制后的分散液只能使用一到两天,这是因为固化剂在溶剂中会很快失去其活性。在混合过程中胶粘剂和固化剂的充分分散是保证成品使用效果一致性的必要条件

 SH-922A系列粘合剂可以用传统的胶带涂敷设备直接涂布,在涂敷前可以进一步用相溶的溶剂如甲苯、二甲苯兑稀,工作液浓度以18-20%左右为宜,具体可根据各自的设备和经验来定。涂布使用溶剂时必须保证通风良好,并请遵守溶剂供应商的安全预防措施和相关法规。

 表面硫化周期:80-90℃*2min除溶剂,以确保在进入固化区硫化时粘合剂中没有溶剂存在;150-170℃*5min,通过热固化使其粘合力、内聚强度以及初粘力进一步加强。但硫化所需的确切条件取决于加热炉的长度、温度和效率,固化剂的类型以及所使用的底材的类型,同时必须在设备上进行试验来确定该条件。

● 如果设备和基材允许使用更高的固化温度,则固化时间可以缩短。与低温固化相比,提高固化温度可以在更短时间内达到胶粘剂的内聚强度。

包装和

装入清洁干燥的200kg或1000L钢桶中,加盖密封。室温(0~35℃)下贮存,储存期为6个月(超期检验合格,仍可使用)防止阳光直接照射,按危险品贮运。

 

 

Silicone resin SH-922A

Ⅰ Performance feature

The 922A series silicone adhesive is a kind of toluene solution based on polysiloxane rubber and resin adding additive. It has high heat resistance, softness and good insulation and moisture resistance. It is suitable for bonding fire-resistant mica tape and pressure sensitive tape. It has the performance of low smoke, good stability, high temperature resistance, no carbon out, and has good weather resistance, moisture resistancewetness and electrical insulation.

 

II Technical Index

Items

Index

Appearance

Colorless or light yellow transparent liquid, opalescent light is allowed,no mechanical impurity

Solid content(150℃, 2h, %)

60±1

Density25℃, g/cm3)

1.0±0.02

Viscosity( 25℃, cp)

10000-80000

 

Application specification

  1. This product is two components, can be cured with peroxide BPO or our special curing agent.
  2. Due to the difference of the substrate, coating equipment, curing period and required characteristics and other factors, the addition of the curing agent is 1.5 ~ 2.5% of the glue. In order to ensure the better mixture of the curing agent and the adhesive, the curing agent needs to be completely dissolved in the solvent and then added to the glue solution and mixed well. At the same time, the dilution liquid should be filtered once using more than 180 mesh filter screen before coating on the machine, to prevent the mixing of mechanical impurities.
  3. The curing agent can be used to accelerate the curing speed or allow the curing at low temperature, and it can also improve the cohesion strength of the adhesive and improve the adhesion property of the adhesive. The mixed dispersion liquid should be used up within 1-2 days. That is because peroxide will lose its activity quickly in the solvent. To ensure the consistency of the finished product, the sufficient dispersion of adhesive and peroxide in the mixing process is necessary.
  4. The SH-922A series binder can be directly coated on the substrate with traditional tape coating equipment. You can further dilute the adhesive with compatible solvent such as toluene and xylene. The advisable working liquid concentration is 18~20% that can be determined according to their own equipment and experience.When using the solvents, please ensure that it is good ventilated and comply with safety precautions and regulations of solvent suppliers.
  5. Surface curing period: 80 ~ 90 ℃ * 2 min  Eliminate the solvent to ensure that there is no solvent in the glue when it enters the solidification zone; 150 ~ 170 ℃ * 5 min, heating curing process further improves the adhesive force, cohesive strength and initial adhesion. But the exact conditions required for vulcanization depend on the length, temperature and efficiency of the furnace, the type of curing agent and the type of substrate used. It must be tested on the device to determine the condition.
  6. If temperature tolerance of the equipment and substrate is allowed, higher curing temperature can be used to shorten curing time. Compared to low temperature curing, raising the curing temperature can increase the cohesive strength of the adhesive in a shorter time.

 

Packaging, Storage & Delivery 

This product is packed in clear and dry 200KG or 1000L steel drum and sealed. Stored at room temperature035).The effective storage period  is 6 months. (Overdue the storage,if the product meet the standard, it can still be used.) Avoid direct sunlight.Be storied and transported as dangerous goods. 

推荐产品

在线咨询

立即咨询