CHEMICALS Courtaulds ( A l a b a m a ) . Both beloeg to a n e w family of cross-linked «celliuilosic fibers whose properties differ dis Styrene-rnodified polyester tinctly from those of rayon, acetate, or resins will take temperatures cotton. Textiles a r e Oourtaiiiilds" pres up to 5 O 0 °F. ent target, b u t tine firm is doâmg iirateniisive development on new uses for t h e JL OLYESTER rtESi^s modified with two fibers. Corval is recommended espec-ialy styrene monomer are now commercially available from General Electric. T h e for blending with synthetic fibers jamd new products Are aimed a t reinforced also with wool, for improving trheiir conplastic applications, will withstand con sumer properties. It's available n o w Era tinuous exposure at 450° F - a n d inter- small commercial quantities a ï 4CD ceauts mittant exposure at 500° F . , says G E . a pound, comes in bright a n d dnilL re'gna( Usual temperature limit o n polyesters lar a n d crimped, a n d in all stamdaird is around 300° to 4 0 0 ° F.) G E engi deniers u p to 15. neers find that additional modifications Topel is designed to b e «used jalonne will allow the materials t o withstand or blended with cotton, acetate, or 600° to 700° F . temperatures. nylon. Its relatively low elon^airionii T h e new products are ! 0 ( K r poly- at break and high alkali resistance, says merizable and B-stageable, thus they Courtaulds. m a k e it paflucnnlairly good can be used iai impregnation towers, for blending with cotton. Topel costs 34 cents a p o u n d in small coniMimeircial GE says. Varying degrees of t a c k a n d polymerization advancement a r e pos amounts; it comes only inn umcriraiped 1 sible for use im pre-impregnated glass form in I /-j a n d 3 denier, im h©th or premix molding materials. A n d t h e bright and dull. materials can he fabricated b y both A few of t h e n e w fibers^ properties vacuum bag techniques a n d niatched (possessed generally by Corval mmore metal die molds, according t o t h e com than b y T o p e l ) : pany. • Water absorption a n d sweliiisg L a b tests have sliown that t h e modi compare with those of cotton; tibias both fied resins will maintain flexural values fibers can b e yarn dyed in 100% ffomna. in excess of 3O_,O0O p.s.i. a n d compres • Good alkali resistance; eaaa b e mersion values of about 20,000 p.s.i. after 200 hours exposure at 4f£5° F . , G E cerized in blends with other syiithetïe points out. Another test conclusion, fibers. • Can b e resin-coated (for wriaiikle according to tha.e company: T h e prod resistance) with a wide r a e g e of crass ucts surpass glass reinforced-epoxy electrical specifications, thus offer possi linking materials. bilities of higher temperature operation • Can be d y e d with all dyes nased while still keeping necessary electrical normally on cellulosic fibers. C2 properties. *w -yr -^ Uses for the modified resins point to • P r e n t o x T a b u t r e x and P r e n t o x Pyburadomes, aircraft ducting, commercial t r e x concentrates 2 0 and 100 aire availheat-ducting mechanisms, and chemi able from Prentiss D r u g & Chenaica! as cal tanks. Printed circuit a n d other repellents. Tabuatmex ( dî-Jiapplications aire also envisioned, says insect GE. C 1 butylsuccinate) is used oia dairy a n d beef cattle to repel bouseSies aod bâttàeg; flies. Pybutrex, a combânatâon of New Fibers on Scene Tabutrex with pyretbrum a e d pipeironyl butoxide, not only repels^ b u t Cross-linked cellulosic fibers adds knockdown a n d IdM t o l i e s , says from Courtaulds b i d for Prentiss. C 3 textile us&s > New potting compounds
Modified Resins from GE
C^OME
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SPRING, people
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wearing clotlies made from t w o n e w fibers—Τ op&l a n d Corval—from 56
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Mitchell-Rand Mfg, They a r e based n epoxy resins using hesahydropiatthalic anhydride or methyl Nadic anhydride from Allied Chemical as cunning ©gents.
Imnipinoved ienniperaiture resistance, less weight ho>$& a t elevated temperatures^ airndl lounger p o t life* a r e claimed. C 4· • Chemical c o o l a n t , by Texacov claims t o spive sniperior rust protection in highly eliletecî s©$uiti©>iriL settle grinding diirt rapidly amd completely,, a n d leave π2θ sticky Elimi OBI machine surfaces. CooBftex L· adbo fbraQspajrerat a n d does nnot develop sMiipIeasairLt odors after p r o loniiiged mise, says t h e company. C5 P- Barium a c e t a t e and. p r e c i p i t a t e d baricsm c a r b o n a t e a r e n o w available iiiroina HuMBTuomel Chemical. Barium ace tate ί{99>% iffiMiniiiiaiiMn· purity ) is used in moLakiinisi oftfier IbairiiiEmi chemicals; a s a textile dying EïMMrdlmt; itnd for making verdlâfioriis in t h e paint industry. Major f tryptophan a n d a s a pirectuurswMr o>i serotonin. C7 • M o l y b d e n u m m e t a l p o w d e r in seven sttjuradtaindl types, is a o w being m a d e hy Sylvamiia Electric Products. C8 >• Arrtirust p o i n t from Paramount I n dminrial JrYc&dlueEs c a n be successfully .applied over dbuap mtetaJ surfaces, says the - with s t a n d a r d Litex paiirût ioomMlatiOinÈS- a n d contributes t o nmnpiroved w a t e r resistance, says t h e eonapamy. CIO • Wcrter-wcLsh d e t e r g e n t a n d d e g r e e s · ing s o l v e n t a r e oiade b y X a r d a Ultrasonnics for mise in ultrasonic cleaning equiBpanieet. C 11 • Oxone-resisting compounds for ©xysgeiai hose coisie from Dayton Rubber. T h e y meet t h e military specifications Μΐ£τΗ-55$1. MIL-T-TISS, a n d M I L · T-702.5, says t h e connpany. C 12 fr S e p o r o n N P 2 0 is a new h i g h activity, poIyaciy-laiEiide t y p e fioccuJating a g e n t imim Do\v Chemical. I t s uses lie in the BmËMiDg^ ρωΐρ ^nû paper r general chesmical pirocessing, a n d industrial w a s t e treatnnieiait fields. C 13 (C&ïïiiÊmued on page
110)
