Document GzG7yznagzLdz2MOp6v2M5qyn

Cross lad.esc: Goodyear Tire & Rubber Co* Emulsion Paints INDEXED'Vv5 CCs Dr* Paul Robinson^ Lab* Mr* Stuart Graves, lab* Mr* E* Cc Eitssgerald 9 Lab* Mr* R* A* Johnston, Lab* Mr* W. C* Johnson, Lab* Philadelphia Laboratory Hovember ZZS 1949 MMQRMIXJM REPORT [-2745 nuuun IU lllniluiihLL UJUUIIfUUUJ LiUJirtll i GOODYEAR lATEX. WATER W On Hovembsr 17th Mr John Bear of the Goodyear Tire & Rubber Company visited this laboratory to discuss the recent developments of laticee in water paints* Goodyear recommends using their vchemigum" 101-A (a butadiene styrene copolymer) as the film former in emulsion paints* This latex may be modified with the Goodyear "Plicaiter type la tiea (copolymers of butadiene and styrene* higher in .styrene content) to improve the hardness of the finished paint-. The price of these various latioes is the same* namely 38$/lb* or. the solids* Literature describing the properties and application of "Chamigum5'' 101-A to emulsion paints was distributed* The paint formulations disclosed therein were discussed* The prime pigment used was a rutile titanium dioxide, also included was a llthopone to demonstrate its compatibility in the system* The extender was of the mica type** The pigmentation :isn*t necessarily I'aatr ictsc. to those materials ' however, it should be kept in mind to select pigments containing a minimum of soluble metallic salts to prevent coagulation of the latex* Roaming during brushing can be reduced by the use of pine oil, octyl alcohol or other anti-foam agents* Alpha protein or a casein solution acts as the protective colloid end also im proves brushing* .A sequesterlrg agent such as tetrabutyl phosphate is incorporated to promote latex stability and prevent pigment floc culation* A wetting agent such as "Darvan ^1" is also employed* This latex vehicle type-of formulation lends itself well . to present paint making; equipment, a short grind in a pebble mill or high speed agitation is sufficient to insure adequate -dispersion* The question of poor adhesion and consequent peeling of latex formulations was -raised. Mr, Bear replied that he had not encountered it, but that the possibility exists* N35402 "* 2 ~ Panels to stew the improved wet erosion rasistanoe of this latex film compared to conventional flat emulsions were exhibited,, Their claim is similar to the Glidden Company's for wsprsd Satin'4s which. we believe to be made from this type of latex* Mr* Bear stated that the Goodyear Company is actively investigating measures to Improve the freeze - thaw stability of laticec 0 They will inform ns when these improved latices are available* In the meantime, samples of MChemigumw 101-A ana avail able MPliolits" type latices will be transmitted to the laboratory* PHILt'^ELPHlA LABGRATCET 0> qv WiJLolv E* VffillGH EJW.tpp DUP030003169