Document BRxpXp7ox8pNRaZq4qopkybLw

CHEMICALS AND PLASTICS P. O. BOX 8361, SOUTH CHARLESTON, WEST VIRGINIA 25303 To (Name) Division location Copy lo Mr. Frank W. Jeffe Chemicals and Plastics Cleveland Sales Office Mr. C. H. Carder Mr. J. P. Carolan / Dr. D. L. MacPeek / Mr. R. W. Martin Mr. H. Mayfield Dale September 9, 1977 Originating Dcpl. R/D Subject Asbestos-Free Tape Joint Formulas Dear Frank: Enclosed are several asbestos-free TJC formulations. The first formulation (2WDM29) is used in our laboratory for latex evaluation and is probably impractical for plant manu facture. This formulation contains Attagel 40 which interacts with CELLOSIZI# thickeners. The use of Attagel 40 should not be encouraged. The other formulations are various recipe modifications of 2WDM29 that do not contain Attagel 40. One of these or a modified version may be suitable for your needs. We commonly use ammonium hydroxide to speed hydration of TJC-500. A manufacturer may prefer to use another basic substance such as potassium carbonate. In any event, the thickener should be dispersed in the batch water before the base is added. I have found that using a dispersant gives improved performance; however, many manufacturers do not use them. Other changes such aspropylene glycol for ethylene glycol and mercuric preservatives for the organic preservative can be made without problems. One-gallon samples of UCAR 131 and TPX-6304 are being forwarded to you separately. TPX-6304 can be substituted for UCAR 131 in these formulations. However, if a mercury or tin containing preservative is used, the TPX-6304 should be added after the preservatives and fillers have been added. A suggested procedure is to disperse the preservative in the batch water, blend in the fillers, and add the latex. Mr. Frank W. Jeffe Page Two September 9, 1977 We are currently working on other asbestos-free formulations. Once these have been optimized the information will be forwarded to you. I hope this information will be of benefit to you. Sincerely Yours, a-<L/, uc WDM:mcb W. D. Massey Enclosure TJC Formulation 2WDM29 Ingredients Water Ethylene Glycol ` CELLOSIZE TJC-500* UCAR 131 Daxad 30 Dowicil 75 Limestone #9NCS Mica P-80-F ASP-400 Attagel 40 Parts by Weight 505.0 15.0 5.0 88.0 10.0 * 1.0 780.0 175.0 80.0 10.0 * A small amount of NH4OH is added after the CELLOSIZE has wetted to speed hydration: Properties Workability Viscosity Room Temperature Adhesion Cracking Resistance 8 545 B.U. 100% 96% 1 A2340C TJC Formulation 4WDM17 Water TJC-500* UCAR 131 Tamol 731 Limestone jr9NCS Mica P-80-F ASP-400 Dowicil 75 421.0 5.0 87.0 10.0 780.0 175.0 80.0 1.0 * NH4OH added after the TJC-500 has been dispersed. Properties;....... Workability Viscosity, B.U. Room Temperature Adhesion Cold Room Adhesion Cracking Resistance 9 570 B.U. 100% 20% 97% A 23401 TJC Formulation 4WDM43 Ingredients Water TJC-500* UCAR 131 Tamol 731 Limestone #9NCS Mica P-80-F Talc TC-100 Dowi ci 1 75 Parts by Weight 365.0 5.0 83.0 10.0 750.0 50.0 200.0 1.0 * 2g NH^OH added after the TJC-500 is dispersed Properties Viscosity . . Workability R. T. Adhesion C. R. Adhesion Crack Resistance 540 B.U.9 92% 7% 100% A23402 TJC Formulation 4WDM97 Ingredients Water Ethylene Glycol TJC-500* UCAR 131 Tamol 731 Limestone #9 White Mica P-80-F Talc TC-100 Dowicil 75 Parts by Weight 345.0 10.0 5.0 83.0 10.0 750.0 50.0 200.0 1.0 * NHjOH added after TJC dispersed. Properties Viscosity Workability R. T. Adhesion C. R. Adhesion Crack Resistance 570 B.U. 9 23% 7% 88%