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Stability of Low Molecular Weight PPOÒ Resin Solutions Disclosure Number: IPCOM000011784D
Publication Date: 2003-Mar-14

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PPOÒ SA120 resin is a new low molecular weight (Mn »2500) polyphenylene-ether (PPE) resin recently commercialized by GE Plastics. In addition to having the well-known properties inherent to PPE, this new resin has an excellent thermal performance (glass transition temperature (Tg) of 165°C) combined with a characteristic feature of improved processability. Replacing the hydroxyl group on SA120 with a reactive methacrylate forms the developmental product PPOÒMX5587 resin. PPOÒMX5587 resin can be used as the building block for films, resin coated copper foils (RCC), adhesives, laminates and many others. In processing varnish for electronic applications it is critical that a homogeneous solution is maintained. Studies were done with SA120 and MX5587 to determine which factors affected the homogeneity of PPE solutions. Factors such as PPE concentration, mixing temperature, mixing time, atmospheric conditions, and the amount of antisolvent in the solvent were evaluated using a design of experiments (DOE). The data show that a stable, homogeneous solution can be made by controlling the amount of antisolvent (e.g. water) in the solvent, in addition to the concentration of the PPE in solution and the mixing temperature. Other properties such as solution color and the time needed to dissolve under the DOE conditions were also evaluated. Key Words: polyphenylene oxide, PPO, polyphenylene ether, PPE, methacrylate endgroup, vinyl capped, stable, homogeneous, RCC, laminate, film, antisolvent, moisture, water