Overview
Structural AB adhesive is a two-component epoxy system consisting of a resin (Part A) and hardener (Part B). When mixed in precise ratios, it undergoes an irreversible chemical reaction to form a rigid, high-strength bond. Developed for industrial applications where mechanical fasteners are impractical, modern formulations achieve lap-shear strengths exceeding 20 MPa. Unlike conventional adhesives, AB epoxy maintains performance across temperature fluctuations (-40°C to +150°C) and resists moisture, oils, and many solvents. Its versatility stems from customizable formulations—some versions include fillers for gap bridging or conductive particles for electrical applications.
Physical and Chemical Properties
The adhesive's mechanical properties emerge after mixing, typically reaching 80% of final strength within 24 hours at room temperature. Full curing may require 72 hours or thermal acceleration. Viscosity ranges from 10,000 to 50,000 cP (Part A) and 5,000 to 30,000 cP (Part B), allowing application by syringe, trowel, or automated dispensing systems. Chemically, cured epoxy forms a cross-linked polymer network with glass transition temperatures (Tg) between 60°C and 120°C. Certain high-performance variants incorporate toughening agents to improve peel strength and impact resistance—critical for dynamic load applications like vehicle chassis bonding.
Main Applications
In construction, AB epoxy anchors rebar in concrete and bonds prefabricated structural elements. The automotive industry uses it for panel assembly, reducing weld points and improving crash energy distribution. Manufacturers of industrial equipment rely on its vibration damping properties for gearbox and pump housing repairs. Advanced applications include wind turbine blade assembly (where its fatigue resistance outperforms mechanical fasteners) and electronic encapsulation (when formulated with thermal conductivity). Recent developments include UV-curable hybrid systems that combine epoxy's strength with acrylics' rapid curing for production line efficiency.
Safety and Storage
Uncured components may contain bisphenol A diglycidyl ether (BADGE) or amine hardeners that are skin sensitizers. OSHA requires SDS documentation and proper labeling. Storage life ranges from 6 months to 2 years in unopened, moisture-proof containers—discoloration or crystallization indicates degradation. For large-scale applications, explosion-proof mixers prevent static ignition of solvent-bearing formulations. Cured waste is non-hazardous but may require specialty disposal if containing heavy metal fillers. Always consult local regulations for spent mixing tools and containers.
B2B Procurement Guide
Industrial buyers should specify: 1) Required bond strength (tensile, shear, peel); 2) Environmental exposure (humidity, chemicals, UV); 3) Application method constraints (manual vs. robotic dispensing); 4) Compliance standards (ISO 10993 for medical devices, ASTM D1002 for shear testing). Bulk purchases (200+ kg) often qualify for 15-30% discounts. Consider just-in-time delivery for temperature-sensitive formulations. Reputable suppliers provide technical support for surface preparation (e.g., plasma treatment for polyolefins) and batch testing certificates. For critical applications, require failure mode analysis reports from the manufacturer.
Related Manufacturers
- 主营：密封胶
- 主营：高强无收缩灌浆料、环氧胶泥、道路快速修补料、碳纤维布结构胶、聚合物改性水泥砂浆、水泥基渗透结晶、混凝土防碳化涂料、环氧树脂砂浆、聚合物防水砂浆、水泥自流平、丙乳砂浆、环氧粘钢胶、环氧植筋胶、环氧碳布胶、裂缝修补胶、界面剂、108胶粉、环氧界面胶、封缝胶、环氧树脂注浆液
- 主营：碳化硅修补剂、金属修补剂、钢质修补剂、环氧树脂结构AB胶、铁质修补剂、铝质修补剂、铜质修补剂、轴承位修补剂、轴磨损修补剂、高温胶水、高温修补剂、皮带胶、快速橡胶修补剂、金属导电胶水、电泳导电修补剂、搪瓷修补剂、搪瓷反应釜修补剂、高温搪瓷釜修补剂、高温密封胶、铸钢修补剂、耐磨陶瓷颗粒胶、导轨修补剂、模具修补剂、高温环氧树脂胶水、PP胶水、PU胶水
- 主营：金属胶水、塑料胶水、高温胶水、丙烯酸ab胶、瞬间胶水、环氧胶水
- 主营：环氧树脂AB胶、UV胶水系列产品、PUR热熔胶、石材ab胶、快干胶/舜干胶
- 主营：万能胶，草坪胶、聚氨酯发泡剂
- 主营：密封胶、耐候胶、白乳胶、结构胶、结构耐候、硅酮结构、石材胶、ms环保胶、解决地面、硅酮耐候、防晒防水、解决墙面、防火阻燃、阻燃绝缘、中性硅酮、阻燃防火胶、强效瓷砖背胶、竹炭净味基膜
- 主营：万能胶、大理石胶、发泡胶、结构胶、水性结构胶、聚氨酯泡沫填充剂、聚氨酯填缝发泡胶、AB干挂胶、云石胶、工业粘合剂、多用途喷胶、水性环保喷胶、环保树脂胶水、聚氨酯填缝剂、SBS万能胶、氯丁胶、喷胶、聚氨酯填缝剂发泡胶、玻璃胶、瓷白胶、美缝剂、透明免钉胶、广告字胶、快速定位胶、美容胶
- 主营：碳纤维布、碳纤维胶、植筋胶、粘钢胶、找平胶、灌缝胶、灌注胶、拼接胶、灌浆料、聚合物砂浆
- 主营：乐泰胶水、南大硅橡胶、北化502胶水、结构胶、拜高胶水、海鹰胶粘剂、卡夫特胶粘剂、安特固胶水、康达新材-万达胶水、道康宁胶水、灌封胶、乐赛尔LOXEAL、北回胶水、禹王胶水、3M胶水、劳保手套、螺纹锁固胶、管螺纹密封胶、快干胶、密封胶、固持胶-轴承胶、环氧胶、UV胶、清洗剂、白云胶水
- 主营：3M胶水、快干胶、底涂、3M结构胶、环氧结构胶、丙烯酸结构胶、粘接ab胶、密封胶、3M喷胶、3M胶带、VHB胶带、77喷胶、3M电子胶、3M热熔胶、工业胶水、助粘胶水、75喷胶、口红胶水、橡胶胶水、橙香清洁剂
- 主营：电子电器胶、工业硅酮胶、耐高温密封胶、卡夫特结构胶、厌氧胶、工业密封胶、工业高温胶、导热硅脂、导热硅胶、汽车密封胶、平面密封胶、平面厌氧胶、紫外光固化胶、灯具胶、聚氨酯胶水、耐黄变胶水、汽车免垫胶、耐油密封胶、密封胶代工
- 主营：快干胶、rtv硅胶、密封胶、结构胶、脱模剂、聚氨酯、瞬间胶、硅橡胶、胶粘剂、电路板、密封硅胶、透明环氧、莫斯胶水、陶瓷胶水、塑料陶瓷、塑料橡胶、强力胶水、环氧树脂、固化胶水、运动器材、灌封胶水、电子防潮、汽车配件、复合材料、木头胶水
- 主营：注射式植筋胶、修补胶、环氧植筋胶、双组份ab胶、涂布型ab胶、建筑结构粘钢胶、灌注胶、碳纤维胶、粘钢胶、碳纤维布、高强植筋胶、高强螺栓植筋胶、加固修补类胶、高强植筋锚固胶、道面修补胶、梁包角钢加固胶、环氧注射植筋胶、支装植筋胶
- 主营：碳纤维布、碳纤维浸渍胶
- 主营：北新防水卷材、碳纤维布、HDPE防渗膜、钢结构防火涂料、混凝土增强剂、环氧煤沥青漆、聚氨酯注浆料、高分子卷材专用胶、粘钢胶、玻璃鳞片、玄武岩纤维丝、手工聚脲、喷涂聚脲、防水施工、防腐施工