Solid surface modifier

Details Solid surface modifier Solid surface modifier

1995-10-23

1998-05-05

Dean, Karen A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

106 1437, 106 1439, 106 1444, 106271, 10628711, 10628713, 10628714, 10628726, 523212, 427387, 427386, 524727, 524506, C08K 906, C08K 522, B05D 302

Patent

active

057475610

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to materials technology and more particularly to protective coatings. In one of its more particular aspects the present invention is directed to multipurpose coatings having properties which make them useful for waterproofing various types of surfaces and rendering them resistant to icing, encrustation and fouling. In another of its more particular aspects this invention relates to protecting surfaces from corrosion and attack by acids, alkalies, and other strong electrolytes, and by microorganisms.
2. Description of Related Art
Various surfaces have been protected against corrosion, icing and fouling by means of coatings containing polymer films, hydrophobic solid fillers and hydrophobic liquids. A disadvantage of the use of such coatings is that it has not been possible to achieve multipurpose protection. Such coatings usually are not versatile enough to protect against damage from a variety of causes.
There is a filler or bulk modifier for epoxy compounds which includes powdered quartz and silica filler, a modifier mixture of aminopropyltriethoxysilane and octamethylcyclotetrasiloxane in a (3-6):1 ratio with the silica filler and modification mixture in a (3.5-4):1 ratio (Inventor's Certificate of the USSR 1669165, SO8K 3/36, 1988). The concentration of the pulverized quartz mixture and the modified silica filler is 35-65 percent by weight.
The filler is designed for addition to epoxy resins in amounts of 18-20 percent. The filler enhances the resistance of products and polymer composite coatings to moisture and other weather conditions, tropical climates, and cyclic temperature variations by a factor of 1.5-2.
The filler is prepared as follows.
The silica filler is loaded into a reaction vessel and heated to 200.degree. C. to remove adsorbed water. The modifier vapor is then added from below (the aminopropyltriethoxysilane and octamethylcyclotetrasiloxane in a ratio of (3-6):1.
The reaction can also be conducted in an inert gas flow or in a vacuum. The reaction byproducts and the physically adsorbed siloxane molecules are removed from the silica filler surface by means of vacuuming or by inert gas at the reaction temperature for a period of 1-2 hours. Silica filler containing an amino group modified silica surface at 0.42-0.8 mmol/g is used.
A drawback of this modifier is poor protective action upon application to surfaces.
A hydrophobic modifier-thickener of highly dispersed media which takes the form of a methoxylated Aerosil (Inventor's Certificate of the USSR 1319476, SO1V 33/18, 1985) is known. Aerosil methoxylation is initiated by surface activation through mixing with calcinated soda at 8 parts by mass per 100 parts by mass Aerosil and then treating with dimethyldichlorosilane (10 parts by mass).
The closest modifier from the technical viewpoint is a ceramic surface modifier which utilizes polyester as an adhesive, styrol as a solvent, and Aerosil as a highly dispersed powder (Inventor's Certificate of the USSR 1692126, SO4V 41/32, 1990). The Aerosil concentration is 1-3 percent by mass. The modifier forms a film of 0.1-0.3 mm on the product surface which provides moisture protection to the ceramic. The water resistance of the coating is effective for 10-12 days.
A drawback of this modifier is its poor degree of water resistance, its flammability, high drag, and the absence of comprehensive protective capacities.
It is accordingly an object of the present invention to provide multipurpose coatings capable of protecting various types of surfaces from environmental factors.
Another object is to expand the field of application and the protective functions of the coatings.
Another object of this invention is to increase the resistance of coated surfaces to corrosion and attack by chemical and biological agents as well as their resistance to weather conditions. Another object of the present invention is to enhance the protective capacity of a modifier surface by combining water repellant, anti-fouling, anti-icing, anti-corr

REFERENCES:
patent: 3024146 (1962-03-01), Bueche et al.
patent: 3177170 (1965-04-01), Lund
patent: 3341490 (1967-09-01), Burdick et al.
patent: 3649588 (1972-03-01), Kennedy-Skipton
patent: 3905823 (1975-09-01), Piskoti
patent: 4175159 (1979-11-01), Raleigh
patent: 4177315 (1979-12-01), Ubersax
patent: 4229228 (1980-10-01), Rotenberg et al.
patent: 4368235 (1983-01-01), Vaughn
patent: 5013788 (1991-05-01), Nagahima et al.
patent: 5045574 (1991-09-01), Kuwata et al.

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