Document B8DNpOVoVbQ34drXgD9X1KEYL

FILE NAME: Union Carbide (UC) DATE: 1968 DOC#: UC030 DOCUMENT DESCRIPTION: Industry Warning Information - Calidria Asbestos "C A LID R IA " A S B E S T O S SG -130 AND SS-2 1 0 For Tape Joint Compounds Lowers Costs Two Ways CALIDRIA Asbestos acts as a body ing and secondary thickening agent permitting formulation of lower den sity, more economical tape joint com pounds without the sacrifice of per formance. CALIDRIA Asbestos is produced by a proprietary manufactur ing process that yields unusually high fiber content and more complete fiber liberation from the natural bundles. As a result, CALIDRIA Asbestos goes up to twice as far, pound for pound, as commercial grades of as bestos containing large amounts of other filler materials that have no . specific desirable effects on tape joint compound properties. Red uces Cracking The fibers of CALIDRIA Asbestos behave as an active lyophobic colloid in aqueous dispersion; by this mecha nism CALIDRIA Asbestos increases tape joint compound liquid cohesive strength during drying. Increased liquid cohesive strength greatly re duces the tendency for cracks over nail holes, in thick sections at the center of the joint, and along the feathered edges. Enhances Sandability CALIDRIA Asbestos contains mainly chrysotile fiber atid is essentially free from abrasive contaminants,such as magnetite and serpentine rock dust. This composition results in a low density product, free from con taminants that interfere with sanding. Improves Uniformity Narrow and well-controlled particle size distribution, low alkalinity and high brightness are characteristic of CALIDRIA Asbestos. These proper ties are consistent from batch to batch and improve the uniformity of tape joint compounds using CALIDRIA Asbestos. Suggestions for Use of C A LID R IA Asbestos CALIDRIA Asbestos can be readily used in your present tape joint compound formulation. Add approximately one-half the proportion of asbestos you now use. Increase the proportion of calcium carbon ate or other inert filler to make up for the lower quantity of asbestos. You may ala> be able to use slightly more water in your ready-mix and maintain your present vis cosity level. No other changes in your October, 196S F.42258 CALIDRIA. CELLOSIZE. L'CAR, and UNION CARBIDE ate trade macks of Union Catbide Cotpocanon. U N IO N CA RBID E CORPORATION CH EM ICALS AN D PLASTICS 3 7 0 PARK AVPNi ip w v m v 10017 "CAL1DRIA"ASBESTO S SG-130 ANO SG-210 For Tope Joint Compounds Suggestions for Use of C A LID R IA Asbestos (Continued) formulacin or manufacturing procedure are required. CALIDRIA Asbestos SG-130 has che coarser particle size; it finds use for bedding compounds or perhaps spackling compound. The SG-210 has the finer parti cle size and is favored for topping com pounds, all-purpose compositions, texture paints, and similar formulas. o v> O n -T . -> I I 5 # - a. ! A Suggested Ready-Mix Tape Joint Compound For Use With C A L ID R IA Asbestos Fillers: Calcium Carbonate, No. 1 White (Thompson Weinman) . Mica, P80F (Western Mica)..................................... Clay, ASP-400 (Minerals and Chemicals Philipp Corp.) 9 C A L ID R IA Asbestos, SG-210 (Union Carbide)........... Binder: ` U C A R Latex 131 (Union Carbide)............................ Workability Control Agent: C E L L O S IZ E Thickener, TJC Grade (Union Carbide)... Drying Control: - Ethylene Glycol (Union Carbide)............................. Defoamer: " Nopco" PD-1 (Nopco Chemical Company) .............. Dispersant: " Daxad" 30 (Dewey & Almy Chemical Div.).............. Bacteriastat: " Dowicide" A (Dow Chemical C o . ) ......................... Total Water: about 56 parts by weight per 100 parts dry solids "Contained solids basis C - Ce. Parts by Weight Dry Basis TT -V . T '< 61.42 21.00 4.00 4.58 J ./ . ,' 6 c 6.60' 0.50 1.00 o.io -4 0.60 ..2 ............... 0.20 / ? 100-00 U c Triers 2  r "CALIDRIA" ASBESTOS SG-130 AND SG-210 For Tope Joint Compounds Typical Product Characteristics Reflectance (G.E. Photovolt) ................... Contained magnetite............................... Alkalinity (as ? of Na2) ....................... pH (5?S aqueous slurry)............................ Surface area ( B E T ) ................................. Oil Adsorption (OOP #/l00# a sb e sto s)...... Wet Bulk, settled voi. (ml.) 10g/250 ml./l hr Dry Bulk (#/ft.3) .................................. Water absorption (wt. % in filter cake) ...... Size distribution (cumulative % retained) Wet Screen mesh size 100 ....................................................... 200 ...................................................................... 325 ............................................. CALIDRIA Asbestos SG-130 SG-210 68? 2? max. 0.5 to 0.06 8.5 to 9.5 50 to 60 m^/g. 90 to 100 200 Z. to 8 55 to 60 n o to 120 220 5 to 6 62 to 65 5 17 28 to 32 Trace 3 10 to 15 Packaging and Shipping Information Product Form - Opened (finely ground) chrysotile asbestos fiber. Packaging - One Package.............................................................. Pallet Weight Carload ................................................................ T ruckload.............................................................. Shipping -- Classification - asbestos shorts Rail point of origin - Welby, California (King City, California) C A L ID R IA Asbestos SG-130 SG-210 40 lb. 30 lb. 1,600 lb. 2,000 lb. 1,050 lb. 1,500 lb. ' TOXICOLOGICAL PRO PERTIES Ic has been known for many years that some persons working in asbescos produc tion were prone to develop a disabling lung disease. In time, this condition became known as asbestosis and was related to exposure to high concentrations of asbes tos dust. With further experience, it was found that men could work with asbestos without development of lung disease if dust concentrations were kept below a certain level. It is now generally accepted that a man can work a 40-hour week for a lifetime without developing asbestosis if the asbestos dust particle count is kept at or below 5 million parricles per cubic foot of air. This dust concentration of 5 million particles per cubic foot of air is the Thresh old Limit Value for asbestos, and no cases 3 "CALIDRIA" ASBESTOS SG-130 AND SG-^10 T O X I C O L O G I C A L P R O P E R T I E S (Continued) of asbestosis are believed to have occurred when exposures have been maintained at or below this level, despite large-scale utilization (now approaching one million tons per year in the U.S.A.). This concen tration of dust is generally not visible in the average work area unless a beam of light causing a Tyndall effect is present. Usually the dust concentration must be from 8 -1 0 million particles per cubic foot before its presence is visible in average lighting conditions. Several years ago, it was reported that there was an increase in the incidence of cancerous tumors, especially of the lung, associated with asbestosis. Recently there have been reports of some cancers occurring in individuals exposed to asbestos dust, but who have not developed clinical as bestosis. It is believed by most authorities that these cases have been associated with exposures significantly exceeding the Threshold Limit Value. A major manufac turer of asbestos products who also mines asbestos has not been able to show an in crease in cancerous growths in men work ing where dust concentrations were main tained at the Threshold Limit Value. Control of asbestos dust exposure is therefore necessary. The control methods are the standard ones applicable to a variety of dusty operations. They include closed flow systems, wet processes where possi ble, and adequate exhaust ventilation where openings in the system are necessary. Pelletizing is sometimes used to impro^ the handling characteristics of otherwise dusty materials. Where satisfactory con tainment to stay within the Threshold Lim Value is impractical or impossible, effi cient and reliable respirators are availab for the protection of the employee. A pr gram of environmental monitoring in manu facturing operations is highly desirable :o determine that Threshold Limit Values a e not being exceeded. Employees shou. wear respirators where dusting occurs jn finishing products such as sanding tap^d joints. Pre-employment and periodic physical examinations of workers are desirable. These should include chest X-rays to in sure that the worker has no chest con dition prior to work with asbestos and :o determine that no lung changes are result ing from work with asbestos. In conclusion, while asbestos du:st in excess of the Threshold Limit Value is potentially harmful, as are many other dusts encountered in industry', it is as readily controlled as other such dusts and it can be used safely with appropriale precautions. 4