Overview
Polyurethane for silver paste is a tailored polymer formulation designed to serve as a binder or matrix in conductive silver pastes. These pastes are critical in electronics manufacturing, particularly for printed circuit boards (PCBs), flexible electronics, and photovoltaic cells. The polyurethane component ensures adhesion to substrates while maintaining the dispersion of silver particles for optimal conductivity. Unlike standard polyurethanes, this variant is engineered to resist oxidation and maintain stability under the high-temperature curing processes typical in electronics production. Its compatibility with silver flakes or nanoparticles makes it indispensable for applications requiring precise electrical pathways.
Physical and Chemical Properties
The material typically exhibits a viscosity range of 2,000-5,000 cP (at 25°C) for liquid formulations, ensuring easy screen-printing or dispensing. Its thermal stability allows it to withstand curing temperatures up to 150°C without degrading, a crucial feature for post-application processing. Chemically, it resists hydrolysis and oxidation, which could otherwise compromise the conductivity of the silver filler. The polymer’s dielectric properties are carefully balanced to avoid interference with electrical performance while providing mechanical robustness to the final product.
Main Applications
The primary use is in conductive adhesives for attaching components in microelectronics, where solder isn’t feasible. It’s also integral to touchscreen coatings, RFID antennas, and thin-film solar cells, where its flexibility and adhesion prevent delamination. In the automotive sector, it enables printed heaters and sensors on curved surfaces. Recent advancements have expanded its role in wearable electronics, leveraging its stretchability and durability under repeated bending cycles.
Safety and Storage
While generally low-risk, uncured polyurethane may contain solvents like cyclohexanone, requiring ventilation during handling. Storage in moisture-proof containers is essential to prevent premature polymerization or clumping. Disposal should follow local regulations for synthetic polymers. Spills can be contained with absorbents like vermiculite, avoiding water to prevent environmental contamination.
B2B Procurement Guide
When sourcing, prioritize suppliers with ISO 9001 certification to ensure batch-to-batch consistency. Key specifications to verify include silver compatibility (tested via resistivity measurements), curing time (typically 30-60 minutes at 120°C), and shelf life (usually 6-12 months). Negotiate MOQs carefully; small-scale buyers may face premiums. Sample testing is recommended to confirm performance in your specific application, especially for high-frequency or high-temperature environments.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：巴斯夫TPU、科思创TPU、亨斯迈TPU、导电银浆树脂、路博润TPU、peek薄膜、peek网布、高温尼龙、高温pc、油墨树脂、PPSU
- 主营：异辛醇、乳化剂、乙烯醚、聚氨酯、醚羧酸、脂肪醇、分散剂、染色助剂、聚乙二醇、异构醇醚、泊洛沙姆、椰油酰胺、基羟乙基、烷基糖苷、特辛基酚、聚氧乙烯、嵌段聚醚、单油酸酯、异构十三醇、丙烯磺酸钠、氢化蓖麻油、丙烯酰胺基、醇醚葡糖苷、低泡渗透剂、甲酯乙氧基、癸基葡糖苷
- 主营：甜菊糖、甘氨酸、cmc淀粉、聚氨酯树脂、阿力甜、栀子红、胺鲜酯、柠檬油、韦兰胶、可可壳、增稠剂、海藻糖、辣椒精、姜精油、独活油、川芎油、海松素、软明胶、酪蛋白、麦芽粉、玉米肽、果乳糖、乳制品、龙脑油、牛磺酸、磷酸铁
- 主营：弹性体、工程材料、特种塑料、增韧剂、氟塑料
- 主营：合成树脂、CPP 树脂、聚酯树脂、丙烯酸树脂、交联剂、分散剂、增稠剂
- 主营：pvc热压、pu连接料、pu胶粘剂、高弹聚氨酯、油墨树脂、专用树脂、印刷树脂、水墨树脂、水性复合、水性油墨、印刷油墨、水性树脂、油墨pu树脂、pe薄膜印刷、pa耐高温树、水性环保pu、水性pu油墨、水性pa树脂、水性pu树脂、耐高温树脂、吸塑处理剂、油墨连接料、吸塑油树脂、胶粘剂树脂、热转移水墨
- 主营：hdpeppeva、ptmeg2000、黑母粒、聚氨酯、pepppspvc、ep-hs2272、色材红、400-10-e1、乙烯pvc、树脂cpp、润滑剂、洁管剂、英国禾、zemac-l65、zemace400、急结剂、ep-hp2033、ep-hp2333、pcl220np1、抗氧剂、硬质pvc、ptmeg1800、monarch880、deurexf61a、kss-frf535
- 主营：导电膜、导电PU膜、按摩腰带导电膜
- 主营：银胶搅拌机、油墨搅拌机
- 主营：树脂合、木质素、分析纯、水性聚氨酯、聚氨酯树脂、聚氨酯弹性体、化学试剂、涂覆金属、己二醇酯、油墨pu树脂、水性pu树脂、二乙二醇酯、二酸二甲酯、聚酯多元醇、树脂固化剂、聚酰胺树脂、水性喷墨打印、聚碳酸酯二醇、面料柔软整理、己二酸乙二醇、改性聚酰亚胺
- 主营：固体酸催化剂、重组胶原蛋白、硅油、特种硅油、聚硅氮烷、硼酸铝晶须、碳化硅晶须、t-BAMBP萃取剂、全氟三丁胺
- 主营：热塑性弹性体、功能助剂、石油树脂、科腾SEBS、耐刮剂、TPU雾面剂、阻燃剂、纯单体树脂、TPU流平剂、除味剂、鞋材止滑剂
- 主营：分散剂、触变剂、消泡剂、聚氨酯胶消泡剂、DW-410、DW-420、DW-110、DW-163、有机硅消泡剂、非硅消泡剂、替代BYK410、替代BYK607、聚脲流变剂、涂料油墨分散剂、环氧胶止流剂、导电炭黑分散剂、钛白粉分散剂、氢氧化铝分散剂、无树脂色浆分散剂、替代BYK420、替代BYK110、替代BYK163、替代BYk3560
- 主营：油漆回收、过期油漆、金属催化剂、油墨回收、胶水回收、树脂回收、船舶油漆回收
- 主营：无机化工、回收无水、回收无机、丁醚回收、塑料颗粒、回收氧化锌、一水柠檬酸、柠檬酸回收、乙二醇丁醚