Unusual Du Pont Chrome Complexes! 1
H 2 C=Ç
"QUILON"
"VOLAN"
Stearato Chromic Chloride
Methacrylato Chromic
Cl 2 :Cr )
Cr:Cl2
Chloride
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.Λ When "Volan" methacrylato chromic chloride is applied as a dilute aqueous solution to negatively charged surfaces, the complex chromium cation is strongly adsorbed and on heating polymerizes to form a film of oriented, reactive vinyl groups. These in turn are reactible with a wide variety of unsaturated resin-forming materials, such as vinyl, allyl, and methacrylate monomers. Polar association has also been ex perienced with other polymers.
The chromium atoms of "Quilon" stearato chromic chloride readily combine chemically with negatively charged surfaces, such as cellulose, siliceous materials or polyamides. Upon heating, the complex polymerizes through chromiumoxygen linkages to form a thin, oriented, insoluble, hydrophobic film which has high water repellency. Surfaces treated with "Quilon" show little or no change in appearance, strength properties or other essential characteristics.
APPLICATIONS
APPLICATIONS
' 'Quilon" stearato chromic chloride c a n be used for prod u c i n g water-repellent films o n ceramics, glass a n d o t h e r vitreous masses; asbestos, wood, paper, c o t t o n , r a y o n , cellophane, starch, hemp; also wool, silk, n y l o n , s y n t h e t i c protein fibers, gelatin, zein, leather a n d o t h e r p o l y a m i d e materials. "Quilon" stearato chromic chloride is used o n paper products where b o t h water-repellency and a h i g h degree of size are desired. Paper treated w i t h " Q u i l o n " stearato chromic chloride, t h e n w a x e d , s h o w s i m p r o v e d resistance to m a n y a q u e o u s liquids, particularly a t e l e v a t e d temperatures, b o t h w i t h respect to w a x a d hesion a n d liquid penetration. T h e a c t i o n of "Quilon" in s e t t i n g certain d y e s suggests utility i n minimizing bleeding or crocking of d y e d textiles, leather or paper. "Quilon" stearato chromic chloride i s also suggested a s a w a t e r repellent t r e a t m e n t for textiles, for modification of glass t o change surface characteristics, a n d t o insolubilize water-soluble polymers.
" V o l a n " methacrylato chromic chloride, through t h e a b o v e mechanism involving the complex chromium ca tion, contributes t o bond formation b e t w e e n glass, cera mic, cellulose (rayon, c o t t o n , cellophane, wood, etc.) or polyamide (nylon, silk, wool, etc. ) surfaces a n d m a n y t y p e s o f s y n t h e t i c resins and m o n o m e r s . I m p r o v e m e n t is par ticularly noted i n the c a s e o f adhesion o f vinyls t o glass where t h e laminated or filled composition normally t e n d s t o be weakened b y absorption o f water. I n cases such a s these, t r e a t m e n t with " V o l a n " methacrylato chromic chloride reduces water absorption a n d markedly im proves physical properties. " V o l a n " m e t h a c r y l a t o chro m i c chloride o p e n s u p a w i d e range of possible uses: for example, i t is suggested for increasing adhesion o f vinyls t o cellophane, w o v e n fabrics, and paper; paint t o wood; rubber t o tire cord; rubber t o clay; and others.
FOR CONVENIENT MAILING
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These n e w D u P o n t chromium c o m p l e x e s are two of a
family of such substances now being prepared and tested in Du Pont laboratories. Technical bulletins on "Quilon" and "Volan" are available, and other chromic complexes are obtainable for experimental study. Use the convenient coupon at right. Du Pont, Grasselli Chemicals Department, Wilmington 98, Delaware.
01 ΡΠΝΤ « e y $ PAT. orr.
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E. I. du Pont de Nemours & Co. (Inc.) Grasselli Chemicals Department Wilmington 98, Delaware
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Please send me available dataL on (Check which) α "Quilon" Π "Volan"
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MATTIA
1
Firm
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Address
1
Application
Title
BETTER THINGS FOR BETTER LIVING . . . THROUGH CHEMISTRY
V O L U M E
2 8,
NO.
1
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J A N U A R Y
2,
1950
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