รายละเอียดเอกสาร

These test methods measure the hydroxyl groups in polyester and polyether polyols containing primary and secondary hydroxyl groups. They also apply to many other hydroxyl-containing substances. Test Method A—Acetic Anhydride Pressure Bottle, recommended for polyesters. Test Method B—Phthalic Anhydride Pressure Bottle, recommended for polyethers and polyesters. Test Method C—Phthalic Anhydride Reflux, recommended for polyethers and polyesters. Test Method D—Imidazole–Catalyzed Phthalic Anhydride Pressure Bottle, recommended for polyethers, polyesters, polymer polyols, and amine-initiated polyols.

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