High-flow resin

Addition of high-flow resins (see section Typical Applications for Polymer Blends )... 

To achieve a better balance between flow and ductility than can otherwise be obtained with the low-MW plasticizers approach, and to retain clarity often lost when blending with other high-flow resins, manufacturers have turned to a fourth option modification of the polymer backbone itself. Polycarbonate chemistry and the process to produce it both lend themselves to incorporation of the following monomers or blocks to increase melt flow ... 

Bite-Registration Waxes are used to estabhsh the occlusion or horizontal relationship of the lower jaw to the upper jaw when there are opposing teeth present. Bite waxes may have a flow of 84% at 30°C. They are generally compounded from high-flow, low-melting paraffins, microcrystalline waxes, and resins. 

In some moulding compositions other special purpose ingredients may be incorporated. For example, naphthalene, furfural and dibutyl phthalate are occasionally used as plasticisers or more strictly as flow promoters. They are particularly useful where powders with a low moulding shrinkage are required. In such formulations a highly condensed resin is used so that there will be less reaction, and hence less shrinkage, during cure. The plasticiser is incorporated to... 

McCaskey, H.O. Jr., United States patent USP 4,123,579. Resin coated substrate using a short-set, high-flow melamine-formaldehyde impregnating resin. Assigned to Westing-house Electric Corp., 1978. 

Place a slurry of Amberlite IRA-400 (6.30 equivalents) in a glass tube 10 cm in diameter and 100 cm high. The resin is washed with 20 x 1. of 5% hydrochloric acid followed with 40 x 1. of distilled water. The yellow aqueous solution is passed through the column and the effluent, which had better be iodine free, is collected at a rate of flow of 50 ml per min. Three and one... 

Flow of resin is high Flow of resin is very low... 

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