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o OTohlA THICKENING OF AMINE HARDENERS LluDIv WITH RESIN-GRADE 144 ASBESTOS Formulation Brookfield RVF Viscosity, cps. X 1(H 24 hours 7 days 30 days Vertical Drawdown Room Temperature (R. T.) 50*C. 80*C. 30 days at R. T. { 30 days at SOX. Parts by WL BAKEUTE ZZL-0814......100 Resin-Grade 144 Asbestos................. 4 Parts by WL BAKEUTE ZZL-0820......100 . Resin-Grade 144 Asbestos....................4 Parts byWt BAKEUTE ZZU0854.....1O0 ReslivGrado 144 Asbestos....................4 RPM. 2 20 187 36 172 34 177 34 Thixotropic Index (T.l.) 53 5.1 5.2 RPM. 2 20 67 32 66 32 67 35 Thixotropic Index (T.l.) 2.1 2.1 1.9 RPM. 2 20 102 23 104 23 104 24 Thixotropic Index (T.l.) 4.5 4.6 4.4 Mil Mil Mil 70 20 _j 70 -- 40 40 40 40 40 -- 40 40 . 40 i j Table 3 shows the thickening of a low-vis 3 cosity, cyclo-aliphatic epoxide, BAKELITE ERL-4221, with Resin-Grade 144 Asbestos bnd "Armac" C, a long chain aliphatic amine salt. BAKELITE ERL-4221 is the exception that requires an amine salt to be used with Resin-Grade 144 Asbestos for viscosity build up or thixotropic stabilization. BAKELITE ERL-2774/ZZL-0814 With a Resin-Grade 144 Asbestos loading of 4 per cent on both resin and hardener, THICKENING OF A tf LOW-VISCOSITY, CYCLO-ALIPHATIC EPOXIDE WITH RESIN-GRADE 144 ASBESTOS it was possible to hold a 70-mil thickness at room temperature. Higher loadings on the amine should result in much higher vertical drawdown. AND "Armac" C BAKELITE ERL-2774/ZZL-0820 Ingredient Parts by Wt. BAKEUTE ERL-4221................................ 100 Resin-Grade 144 Asbestos........... ................7 ' 'Armac" C.......................................................5 i ,. -- " j Brookfield RVF Viscosity, cps. X 10-* - --- . ! RPM. ! Thixotropic ; 2 ' 20 Index (T.I.) A 4-percent loading of Resin-Grade 144 Asbestos resulted in a 40-mil thickness that did not sag within 40 minutes at 80C. The system was gelled at that time. BAKELITE ERL-2774/ZZL-0854 Initial 8 Weeks at 25*C. [ 7 Weeks at 40*C. . 262 268 243 42 36 38 6.3 7.4 6.4 With a 4-per cent loading of Resin-Grade 144 Asbestos, it was possible to hold a 40-mil thickness at 80?C. until gelled (65 minutes).