Dow Corning chlorosilanes and silazanes ...five ways to improve your product and process. The unique reactivity of Dow Corning chlorosilanes and silazanes opens a variety of commercial possibilities for new or improved products and greater processing economies. For example, these chemicals are capable of modifying by silylation the active hydroxyl, amine, and thiol functionalities of many organic and inorganic materials. Although their usefulness is not limited to silylation, the following examples show how Dow Corning chlorosilanes and sila-
zanes make many reactions possible or more efficient. When necessary, desilylation is readily accomplished with water or simple alcohols. These are basic examples of how Dow Corning chlorosilanes and silazanes can significantly improve products and processes. Equal or greater opportunities exist right now in your processing techniques and new-product development. For more information, return the coupon.
Silylated cellulose.
1
OSi(CH3)3
/ Cellulose + (CHshSiCI*
>»
CH
-ChL I \ OH
CH
.0/ CH
-CH' I CH 2 0Si(CH 3 )3
Altering solubility.
The solubility of silylated cellulose in organic solvents provides unique films and coatings. Urea synthesis. HN
(CH2)n + (CHabSiCI*
Blocking reactive sites.
I
MCH 2 )n
C0CI 2 -
c=o
+~ (CH2)n
HN
H2N
Si(CH3)3
Si(CH3)3
R00H +
(CHsbSiCI* or (CHskSiNHSKCH^**
(CHafeSiOOR
[
VL
Altering solubility C-0H O C-0Si(CH3)3 and blocking reactive sites. Silylation of amino acids such as penicillanic acid provides an organic soluble intermediate with protected reactive sites allowing further chemical modification. To convert hydrophilic minerals into hydrophobic materials. Changing surface characteristics.
SiO^OHJn +
(CH^SiCI* or — • (CHsfeSiNHSKCHak"
*Dow Corning® Z-1224—Trimethylchlorosilane
DOW CORNING CORPORATION DEPARTMENT A-1212 MIDLAND, MICHIGAN 48640 • Please send additional information on chlorosilanes and silazanes. I am interested in • Defoamers, • Release Agents p Specialty Chemicals, for use in
C&EN AUG. 23, 1971
Silicone defoamer prices have dropped 20% since 1969. While today's price is now more competitive with organic defoamers, the effectiveness of silicone defoamers is far superior. Production is faster, more efficient. Result: far more value for your defoaming dollar.
DOW CORNING
Si0 2 [0Si(CH 3 b]n
*Dow Corning® Z-6079—Hexamethyldisilazane
Title
Name Company Address City
36
Dow Corning® 200 fluid is now priced at less than $1.00 per pound in drum quantities.
For more information on how these Dow Corning silicones can improve your products and processing, complete and return the coupon.
Penicillin synthesis. (CHskSiCI* (CHsfeSiHN —| or — (CH3)3SiNHSi(CH3)3"
Examples:
Specialty silicones for cosmetics, polishes, and general household products have dropped in cost steadily over the past five years. You can offer better quality products at lower selling prices.
The direct synthesis of cyclic ureas is possible after silylation of a, co-diamines. Increasing thermal stability of hydroperoxides. Increasing stability.
Dow Corning silicones built their reputation on outstanding performance. Now, there's a new dimension. Price. Substantially lower prices— for a variety of silicone products.
Silicone release agent prices have dropped 30% since 1969. This saving—plus faster production, more mold cycles per application, and fewer rejects—gives you substantial cost reduction, increased profits.
Si(CH3)3 l
Si(CH3)3 H2N
Silicone values from Dow Corning are now greater than ever.
State
Zip
