Accelerators for curing phenolic resole resins

Details Accelerators for curing phenolic resole resins Accelerators for curing phenolic resole resins

C - Chemistry, Metallurgy

08

G

C08G 8/28 (2006.01) B22C 1/22 (2006.01) C08J 3/24 (2006.01) C08K 3/00 (2006.01) C08K 3/22 (2006.01) C08K 3/26 (2006.01) C08K 5/04 (2006.01) C08K 5/10 (2006.01) C08K 5/13 (2006.01) C08K 5/16 (2006.01) C08K 5/3492 (2006.01) C08L 61/04 (2006.01) C08L 61/06 (2006.01)

Patent

CA 2052224

There are disclosed methods and compositions for accelerating the hardening of phenolic resole resins having a pH of about 4.5 to 9.5 with lightburned magnesium oxide or magnesium hydroxide, with or without the addition of an ester functional hardening agent. Acceleration of hardening is achieved by incorporating into said compositions an effective quantity of a material which: increases the solubility of magnesium in the hardenable mixture; by certain amines; or by certain chelating agents. Accelerator compounds include those which provide chloride, sulfamate, nitrate, formate, and phosphite anions as well as selected tertiary amines.

On divulgue des méthodes et des compositions pour accélérer le durcissement des résines phénoliques de résol ayant un pH d'environ 4,5 à 9,5 avec de l'oxyde de magnésium ou de l'hydroxyde de magnésium ayant subi une calcination légère, avec ou sans addition d'un durcisseur à fonction ester. L'accélération du durcissement est réalisée par l'incorporation dans lesdites compositions d'une quantité efficace d'une matière qui : augmente la solubilité du magnésium dans le mélange durcissable; par certaines amines; ou par certains agents chélatants. Les composés accélérateurs comprennent ceux qui fournissent du chlorure, du sulfamate, du nitrate, du formiate et des anions phosphite ainsi que des amines tertiaires choisies.

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