. . . to help the rubber industry perfect low t e m p e r a t u r e polymers a n d a c c e l e r a t e their commercial production for automobiles and truck tires.
. . . a new synthetic r u b b e r catalyst, P a r a - M e n t h a n e H y d r o peroxide—which shows exceptionally high polymerization activity and has b e e n found particularly satisfactory for production of synthetic cold rubbers of the G R - S - 1 0 0 t y p e . Hercules* P a r a - M e n t h a n e H y d r o p e r o x i d e ( P M H P } also shows promise as a catalyst for the emulsion polymerization o f other monomers such as acryionitrile, methyl methacrylate, vinyl acetate, a n d vinyl chloride.
ColdRubber
Catalyst
RESULTS . . . tougher, longer-wearing r u b b e r that can b e economically produced in quantity from r e a d i l y a v a i l a b l e materials. N o t only tires, but many other civilian a n d defense products a r e prospects for cold rubber. This successful synthetic owes its r a p i d growth l a r g e l y t o the catalysts which w e r e r e a d y when n e e d e d . Other commercial grade h y d r o p e r o x i d e s produced b y Hercules a n d used as p o l y m e r i z a t i o n catalysts include Hercules* C u m e n e Hydroperoxide (CHP) a n d Hercules* D i i s o p r o p y l b e n z e n e H y d r o peroxide (DIBHP). M a n y other Hercules c h e m i c a l materials h a v e helped in the d e v e l o p m e n t of synthetic rubbers a n d in i m p r o v e ments of natural rubber products, t o o . These include emulsifiers, reclaiming a g e n t s , numerous rosins a n d synthetic resins, c a s e i n , a n d purified cotton linters a s a b a s e f o r tougher tire cords. Hercules w e l c o m e s the opportunity of p l a c i n g its l o n g e x p e r i e n c e in rubber a n d associated chemical m a t e r i a l s at y o u r disposal. HERCULES
POWDER.
COMPAMY Sales Offices
932 Market
St., Wilmington,
Delaware
in Principal Cities
HERCULES
SYNTHETIC RESINS-CELLULOSE PRODUCTS —TERPENE CHEMICALS-ROSIN AND ROSIN DERIVATIVES-CHLORINATED PRODUCTS-OTHER CHEMICAL MATERIALS FOR INDUSTRY 4786
C H E M I C A L
AND
E N G I N E E R I N G
NEWS
C M C I m p r o v e s Paperboard Hercules® CMC, purified cellulose gum, is being used effectively a n d efficiently by the pa perboard industry for calen der stack water box treatment. CMC produces resistance to penetration b y oils, greases, a n d waxes; improves sur face stren cjth a n d prevents scuff resis tance and -fuzz «difficulties; and improves mullenand tensile strength. Board treated at t h e calesnder stack with CMC may be given a densometer reading 2 0 times and a decrease in oil penetration rate of 10 tim«es that obtained with water only. For Nvaxing grades such a treat ment may reduce wax consumption by 30 to 35e5& arsd give a superior print job. Very worthwhile ir»k savings and improved press operations are possible with CMC-treated board.
N e w U s e s for H EC The new&st use found for Natrosol® Hercules bydroxyethylcellulose is to a i d the coagulation of agents used in water purification; HEC promotes fast settling of alum Floes, and improves clarity of the water. HEC Is also suitable as a starch replacement in flotation, a per manent size in textiles. Other possible applications include textile printing me d i a , inks, leather coatings. Two viscosity types are available. Natrosol, Hercules hydroxyethyl cellulose is an alkali-sol uble, warer-insoluble cellulose ether of good film-forming properties. Density 1,49 gm/cc and refractive index 1.534, in film form, a t 25°C. Natrosol, Hercules hydroxyethyl cellulose is a white, taste less, odorless, fibrous solid, insoluble in all common organic solvents, oils, fats, and greases, soluble in alkalies—e.g. 2 % to 18 ^ N a OH.
For IMex:t Summer's Flies Thanite'^ will take care of them! De veloped by Hercules, this terpene thiocyanoacetate makes Insecticide sprays that have a f a s t effective kill, cost little to produce. Only three gallons of Thanite in 97 gallons of base oil produce a spray thot grades AA by the official Peet-Grady method; even 1 % Thanite gives knock-down punch to a 5% DDT res'lual spray.
Visit the Hercules exhibit, 7 W , a t the TWENTY-THIRD EXPOSITION O f CHEMICAL INDUSTRIES, Grand Central Palace, New York 17, Ν. Υ., November 2 6 t o December 1, 1951. I
GC51-6
V O L U M E
2 9,
NO.
45
»
NOVEMBER
5,
1951
4787
