all about: silicone products; a war baby, versatile silicone now shows up everywhere

by:Keyuan     2020-06-22
By BARNABY J. FEDERDEC.
1991 this is a digital version of an article from The Times Print Archive, before it starts online in 1996.
To keep these articles as they appear initially, the Times will not change, edit, or update them.
There are occasional copywriting errors or other problems during the digitization process.
Please send a report of such issues to archid_feedback @ nytimes. com.
Although they only occasionally make headlines and then only use them in their most exotic applications such as breast augmentation or O-
The ring of the shuttle, the silicone compound turns blue-
Collar pillar of the chemical world.
Silicone compounds are widely used in the construction, industrial applications, textile production and service sectors, supporting businesses such as printing and labeling, to the extent that Dow Corning\'s revenue growth (
Negative in 1982, down since 1987)
As the largest silicone producer, it can be used as an indicator of economic health.
On a global scale, few markets as big as silicone-
Some estimated $6 billion-
It consists of so many niches.
Dow Corning estimates that it has sold more than 5,000 silicone products to 105 different industries, none of which accounts for more than 3% of the company\'s total sales of silicone products.
General Electric Corporation, No.
According to the company\'s statistics, the company produces more than 4,000 kinds of silicone products.
Silicone is a thorn made of polymer or repetitive molecular chains alternating oxygen with silicon, an element today known as the most common building block for semiconductors.
A variety of resin, gel, foam, liquid, paste and rubber-
Like materials, it is made by attaching other chemicals to the polymer backbone or forming cross-linking between polymers.
Silicon is a major component of sand and quartz rock and one of the most common elements on Earth.
It has been used in ceramics for thousands of years and has long been known for its simple and stable bond with oxygen.
But until the beginning of the century, when researchers began to systematically explore the effects of silicon binding to organic compounds, silicon chemistry developed.
Although the basic ingredients are cheap, the series of chemical reactions needed to synthesize a useful amount of silicone is by no means.
Donald Perkins, general manager of GE\'s silicone business, said: \"advertising\" there is a lot of art and a lot of unexplored chemicals. \".
Dow Corning and G. E. Is No.
Dow Corning was founded in 1943 and quickly launched its first major silicone product. A high-quality insulating grease for electrical machinery used to help Allied aircraft fly at high altitude and low temperatures during World War II.
The company was founded by Corning Glass factory and Dow Chemical, which developed the first silicone product for hollow fiber glass in 1938.
Dow Corning, headquartered in Midland, Michigan.
Sales last year were $1, with a net profit of $0. 171 billion. 72 billion.
More than half of the company\'s silicone products are sold overseas.
The company spent about 8% of its income on Research, an unusually high figure in the chemical business.
General Electric, its silicone business base, Watford, N. Y.
Shortly after Dow Corning launched a more efficient manufacturing process, the process entered the industry and is still used in many silicone products.
He said the company is currently trying to narrow the focus of its product line. Perkins said. G. E.
Like other major companies other than Dow Corning, the company did not report any figures detailing its silicone business scope or profitability.
The third largest company in the United States is united carbide.
It is planned to sell the silicone business to G. E.
In 1988, against the Federal Trade Commission, carbide further entered the field by purchasing BP\'s silicone business in Europe.
The United States is the leading market for the latest silicone applications, but industry executives say Europe is catching up quickly.
While no one collects or reports the industry-
Sales in Europe and the Far East are believed to be similar to those in the United States.
Major foreign producers include Huls, Wakker and Bayer in Germany;
The Rhone plank is in France and Shenetsu is in Japan.
Medical use silicone from implants to burn treatment has long been considered a useful material for consumer goods such as medical equipment, medicines and deoderants, shampoo and cosmetics, because it can be made in an unusual chemical compatible form with the human body.
Other silicone properties also play a role in each application.
Silicone as foam-
The control agent is an active ingredient in many antacids.
Other ones are used to lubricate needles.
Use rubber silicone in balloons injected under the skin to stretch it, thus creating more skin for plastic surgeons in reconstruction operations for burn patients.
The other replaces natural rubber in the nipple of the baby bottle.
A new use of silicone is to chemically encapsulate other compounds in drugs and cosmetics to regulate the release of active ingredients.
Please click on the box to verify that you are not a robot.
The email address is invalid. Please re-enter.
You must select the newsletter you want to subscribe.
View all New York Times newsletters. The highest-
Profile medical silicone was recently used in breast augmentation surgery.
Over the past 30 years, more than 2 million American women have undergone silicone implants with the aim of expanding small breasts or restoring breasts lost due to cancer.
The implant consists of hard silicone around the silicone.
In recent years, critics say there is evidence that these operations are related to some diseases.
Last month, a panel from the Food and Drug Administration said more data was needed to support manufacturers claiming implants were safe, but it was recommended to leave them on the market before the study was completed.
The agency must act on this qualified vote of confidence by January. 6.
Beat more niche in oil
Competitive-based silicones tend to be more expensive than organic polymers, such as all polymers derived from oil.
As a result, silicone is usually high-
Performance without oil-
The first thing to consider is not alternatives and prices.
Silicone replaces organic lubricants when parts are exposed to extremely high or low temperatures or pressures.
A particularly precious feature is the ability of many silicones to apply in liquid or paste form, and then become solid in low heat and even simple exposure to air.
One of the most extensive applications of silica gel is to simultaneously attach glass windows to buildings and seal them.
Silicone is usually very waterproof, rust-resistant and slow to degrade when exposed to the sun.
These features, along with flexibility and simple curing, determine their use in highway expansion joints and household caulking agents.
Occasionally, a new market is almost occupied by silicone manufacturers.
This happens when there is concern that the toxicity of the PCB forces utilities to look for another substance with similar heat and electricity properties.
More often, however, manufacturers find themselves tinkering with silicone chemistry to create a collection of features that are well suited to customer needs so much that it will pay for silicone than cheap plastic or metal
\"We did a lot of molecular modeling on computers today and then tried to synthesize new compounds,\" said Leon Kosman, director of Dow Corning technology . \".
\"It made us try a lot of strange combinations.
\"Stupid putty, now a classic silicone compound, perhaps the most famous is a methyl borosiane with an unusual Cross
This connection was discovered by accident at GE labs in 1943.
Engineers are looking for a very hard silicone rubber.
But the warehouse sent the wrong chemicals. the engineer got the putty.
Just like the material crushed into pancakes when placed separately, it can be stretched like toffee, and when rolled into a ball and thrown on the floor, it bounces like crazy.
The substance was considered a simple mistake, and the result was unusually stupid until Peter C. , 1949.
Advertising copywriter Hodgson heard about it from a friend.
He borrowed some money, named these things Silly Putty, wrapped them in plastic eggs, and started marketing it as a novelty through Neiman
Marcus and the two-day bookstore
After about 3,000 tons, stupid putty no longer enjoyed the fashion status in the 1950s S, but was on sale.
It was made by Pa Easton.
Binny and Smith.
Known for its Crayola crayons.
Last year, it launched many colorful versions that match classic pink
This year, the original beige has added a lightin-the-dark version.
A version of this article was printed on page 3003010 of the National edition on December 29, 1991 with the title: all about: silicone products;
There is now a war baby everywhere, multi-functional silicone.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...