Silanated polyamide adhesive and its preparation

Abstract

Abstract ADHESIVE BINDERS FOR BARE METAL SUBSTRATES PREDOMINANTLY COMPRISING A THERMOPLASTIC SILANATED POLYAMIDE PREPARED BY MELT BLENDING A MELT-POLYMERIZED POLYAMIDE CONSISTING ESSENTIALLY OF RECURRING CARBOXYAMIDO GROUPS AND AT LEAST TWO DIFFERENT SPECIES OF RECURRING HYDROCARBYLENE GROUPS SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND ALICYCLIC GROUPS OF 2 TO 48 CARBON ATOMS AS INTERGRAL PARTS OF THE MAIN POLYMER CHAIN, AND HAVING AT LEAST THREE DIFFERENT RECURRING POLYAMIDE REPEAT UNITS. A CRYSTALLINE MELTING POINT BELOW ABOUT 230*C., A MELT INDEX OF ABOUT 0.1 TO 200, A MOISTURE CONTENT OF LESS THAN ABOUT 0.5 WEIGHT PERCENT, AND AT LEAST AS MANY AMINE ENDS AS CARBOXYL ENDS, AT A TEMPERATURE ABOUVE THE CRYSTALLINE MELTING POINT OF THE PLYAMIDE, WITH ABOUT 0.1 TO 3 PERCENT, BASED ON THE WEIGHT OF THE POLYAMIDE, OF A SILANATING COMPOUND OF THE FORMULA (RO3-SI-R1-Q IN WHICH R IA ALKYL OR ALKOXYALKYL, R1 IS HYDROCARBYLENE SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATICS, SATURATED ALICYCLICS AND AROMATICS OF 2 TO 40 CARBON ATOMS, AND Q IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF AMINE, OXIRANE, ALKOXYCARBONYL, CARBOXYL, HYDROXYL, ALDEHYDE, AMIDE, ANHYDRIDE, CARBAMATE, ISOCYANATE, ISOCYANIDE, ISOTHIOCYANATE, ISOTHIOUREA, KETOXIME, LACTIDE, MERCAPTO, OXIME, OZONIDE, PEROXIDE, THIAL, THIOCYANATE AND UREIDO.

Inventors

• 👤 Jerome W Sprauer

Bibliographic Details