Adhesives electronic-grade

RTX366. [l one-Poulenc] Supercooled liq. cyanate ester monomer for large aircraft composite structures, micro-wave antennas, radomes, spaceware, and structural or electronic grade adhesives. 

Mooney CT. Electronic grade adhesives, reliability and performance. In Proc. 35th Electron. Comp. Conf 1985 326-330. 

Mooney, C. T., Electronic Grade Adhesives, Reliability and Performance,... 

The pH of the carbon blacks is used to indicate their relative acidity or basicity, because the properties of these materials (i.e., adhesion and charge injection in carbon-polymer composites, electrochemical behavior) depend sensitively on the surface chemical and electronic sfructure [174, 222, 223]. This parameter is usually related to the amount of chemisorbed oxygen present on the surface, and to the very small amount of water soluble salts present in the material. The pH of carbon blacks is neutral to slightly alkaline for most grades, due to the low amount of chemisorbed species. To enhance certain properties, carbon blacks can be oxidised, with a subsequent increase in the amount of chemisorbed oxygen groups. These carbon blacks, therefore, show an acidic pH values, and relationships have been reported between the pH of carbon blacks and their content of volatile matter [223]. 

For Class K (space-grade), the additional tests of nondestructive wire bond pull, FIND, and radiography are imposed. Screen tests assure the reliability of the entire electronic product of which the adhesive joints are a part. 

Adhesives used in connector applications include Loctite s 3887 isotropic epoxy conductive grade. This two part product comes as a thick paste which is cured by exposure to heat and which is designed for enhanced adhesion to gold plated devices in electronic interconnect applications. The product formulation is reported to absorb stress associated with extreme thermal mismatch between dissimilar substrates. 

FireShield HPM Series High Purity antimony oxide is used as a catalyst, chemical Intermediate and flame retard2uit in specialty applications requiring low levels of lead, arsenic and other trace metals. FireShield HPM is available in tvro grades. The 1.0 to 1.6 micron average particle size is suitable for many sensitive electronic applications, while the 0.2 to 0.4 submicron grade is used in liquid systems such as epoxies, urethanes, adhesives, paints, solvents and colloids where dispersibility or surface area is ing>ortant. 

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