Document 3Q6KEe9y2avVXVKMVRVB8d9y0

/ PROJECT REPORT i BUSINESS CONFIDENTIAL LOCATION: 50-87 (Garland, TX) REF: 9JG-74 2Dn6^c,37Es> EVALUATION OF GLASS RE-ENFORCEMENT FILLERS IN LATEX HIGH-BUILD COATINGS cHq AUTHOR: R. C. PIERREHUMBERT DATE: November 20, 1979 WORK BY: A. V. PARIKH SUMMARY As a result of current OSHA regulations on asbestos-fiber handling precautions, manufacturers of latex high-build coatings and mastics have expressed interest in suggested formulations with alternate re-enforcement fillers. This current study has established a good procedure for the incorporation of two Owens Corning Fiberglas products; namely: 1/64 inch Flaked glass and 1/2 inch Chopped glass (with 10% contained water), in UCAR Latex 154 based coatings designed rewrotect urethane foam insulation and in general for weather-barrier roof protection. Test results showed excellent resistance to shrinkage cracking of high-build films, good adhesion to rigid urethane foam; plus excellent adhesion to wood, aluminum and steel at 200 to 300 percent elong ation (72-75F). This data will be presented to several specialty-coatings accounts in the Southwest market area. INTRODUCTION OSHA regulations on the safe plant-handling of asbestos-fibers re-enforcement fillers have brought about an increased aware ness in alternate fillers to use in high-build coatings and mastics. Several months ago three grades of chopped fiberglass from the Owens Corning Fiberglas Corporation (0CF) had been evaluated at our Garland, Texas technical service laboratory in high-build (68 percent solids by weight) latex coatings. All showed difficulty with good dispersion in the "let-down" portion in low-speed high-shear mixing equipment, but other film properties proved to be favorable. A report was written for general distribution. Discussions with Mr. Harold Hagmeier at 0CF Dallas Sales Office (214/233-9241) led to the evaluation in the current reported study; of their 1/64 inch Flake glass and a 1/2 inch Chopped "Fiberglas" (the latter containing ten percent contained water). ^ DISCUSSION This time, the pigments were dispersed in a disc-type high speed disperser operated at half-speed during addition of the glass re-enforcement fillers. It is important not to crush the glass particles more than necessary, and the slower speed also inhibits air entrainment in the final high-solids product. A23082 "llU! *;>V^V;^- liK-vr? ry : *i.'-.ST--J TABLE 1 SUMMARY OF TEST RESULTS ON GLASS RE-ENFORCEMENTS IN UCAR LATEX 154 HIGH-BUILD COATINGS Ref: 9JG-74 PROPERTIES TESTED Type "OCF" Glass-Filler Used Re-enforcement Levels Consistency (KU) pH 85 Angular Sheen Dry-Film Appearance % Elongation Tensile Strength (psi) *180 Peel Strength (1bs/inch) Pinewood A1uminum C. R. Steel Rigid Urethane Foam with skin onnnKage \ i/*t imcK m imj Flexibility (0F) (1/16" Dry Film Thickness) 120F Stability (3 weeks) Freeze/Thaw Stability (0F) Flame Retardance To Burning Embers To Sustained Gas Flame A Flake Glass 10 lbs 107 6.9 -8 Smooth Soft 295 67.3 B Flake Glass 15 lbs 79 6.7 6 Smooth Soft 225 66.1 C Chopped Glass 10 lbs 103 6.7 10 Orange Peel Soft. 265 82.7 16.0 (C) 15.5 (AC) 14.5 (C) 13.1 (AC) 13.5 (CA) 10.0 (C) 16.4 (C) 13.3 (CA) 11.0 (C) 4\1All 4.8 (A) 2.9 (A) MM were excel lent 5.4 (A) /\* ^-------------All passed 1-inch diameter rod--------------- Okay Poor Okay Poor Okay Poor Good Good Good f-------------All show continued slow Durni ng---------------} TV* '-i *180 Peel Legend: (C) = Cohesive Failure (A) = Adhesive Failure 7rvs rr,iorn`.%o."i is no: lo be as v.rra*)i>' O' er*ese"::g::c lo* v.rcn we assume lecai espcr.s:t*'-*ty no* j.frmis..<n o ieer-T.*r.ensa:iontorfac:'ce an, paJer.:: inve-v-on'^nou;* tcense. * cMeieC srel, lor you* conr. o&rai.on -.esi ca:.0".. ano vr*~;auon. (CA) = Mostly Cohesive Failure (AC) = Mostly Adhesive Failure UNION CARBIDE CO Sn8 3 COAT IN^S MAT K.ALS . RCScARCm a*o CFvE:0^NT DLPaRIK'.SNT r./7nno TABLE II HIGH-BUILD FLEXIBLE TEST COATINGS REF: 9JG-74 CHARGE FOLLOWING AT MIXER HALF-SPEED UCAR LATEX 154 "NALCO" 2300 DEFOAMER POTASSIUM TRIPOLYPHOSPHATE TERGITOL NP-40 (70AQ) "MINERALITE" MICA 3X AMMONIUM BENZOATE TI-PURE R 901 OCF-1/64" FLAKE GLASS OCF-1/2" CHOPPED "FIBERGLAS" "KINGSLEY" CLAY "UNICLOR" 40 ANTIMONY OXIDE TRiCRESYL PHOSPHATE "COSAN" PMA-30 WATER * "DICALITE" WB-5 WATER UCAR LATEX 154 28% AMMONIUM HYDROXIDE "NALCO" 2303 WATER A_ B C 550.0 1.0 1.0 3.0 145.0 1.0 15.0 10.0 ` 550.0 1.0 1.0 3.0 145.0 1.0 15.0 15.0 550.0 1.0 1.0 3.0 145.0 1.0 15.0 - - -- 45.0 45iO 45.0 25.0 25.0 25.0 5.0 5.0 5.0 63.0 63.0 63.0 2.0 2.0 2.0 20.0 20.0 20.0 70.0 70.0 70.0 DISPERSE 20 MINUTES AT HALF-SPEED, THEN CONTINUE AT SLOWER SPEED: 38.0 38.5 68.0 78.0 78.0 78.0 2.0 1.5 2.0 3.0 30.0 3.0 30.0 3.0 - 1118.0 1123.0 1118.0 PHYSICAL CHARACTERISTICS PVC 23.5% TOTAL SOLIDS BY WT. APROX. YIELD APROX. RMC/GALLON 69% 102 gallons $3.75 A23084 A2308b