JPH01129074A - Nonsticky film - Google Patents

Abstract

PURPOSE:To make it possible to form a nonsticky film having high-temperature applicability and toughness heretofore unattainable and having nonstickiness and heat resistance higher than those of a conventional fluorocarbon resin coat, by applying a paint based on a polytitanocarbosilane to a substrate. CONSTITUTION:A nonsticky film is formed by applying a paint based on a polytitanocarbosilane to a substrate and curing the wet film by heating. Examples of said substrate include hot plates, turntables of microwave ovens, trays of oven toasters, and inner walls of refrigerators. A black paint of a polytitanocarbosilane can be prepared, for example, by adding a high- temperature-resistant black pigment such as Cr, Mn, Fe or carbon and a thickener to an organic solvent varnish of a polytitanocarbosilane at such a mixing ratio that the specific gravity is 1.3, the nonvolatile content is 67%, the polytitanocarbosilane content is 20-70wt.%, and the black pigment is about 30-80wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-adhesive film formed on the cooking surface of a hot plate, the inner wall surface of an open refrigerator, the surface of a cooking plate, etc.

[Prior art]

Conventionally, fluororesin, polyphenylene sulfide (PPS),
Alternatively, there are those coated with a resin paint such as polyether sulfone (PES).

[Problem that the invention seeks to solve]

Non-adhesive coatings such as the above-mentioned fluororesin paint coating have a relatively low practical heat resistance temperature of around 250°C, and at 300°C, they become softened and decomposed, resulting in the coating disappearing.

In addition, in recent years, as consumer needs for appliances that can cook at high speeds have increased due to the rise in cooking temperatures, high-temperature heat-resistant (4.
00°C) is required.

[Means for solving problems]

In the present invention, a paint containing polytitanocarbosilane as a main component is applied to a base material and cured by heating to form a non-adhesive film.

[Effect]

According to the present invention, the film is strong and non-adhesive up to a maximum of 400°C, and even if the temperature exceeds 400°C, the non-adhesive property disappears, but the film itself becomes ceramic and becomes even stronger, making it stronger than the base material. It does not peel off and can prevent corrosion of the base material.

〔Example〕

As the base material of the present invention, a hot plate (made of aluminum alloy casting) is used, and the cooking surface of the hot plate is coated with a black paint of polytitanocarbosilane, an organometallic polymer (trade name, manufactured by Ube Industries, Ltd.). "Tyrano coat")
A coating of 20 to 200 microns is applied on the surface of the coating on which a ceramic sprayed coating has been formed in advance, and the coating is heated at 270°C for 20 minutes.
Bake for 0 minutes to form a non-stick film.

The black paint of polytitanocarbosilane contains Cr, Mn,
A mixture of black pigments such as Fe and carbon and a thickener, with a specific gravity of 1.3, non-volatile content of 67 inches, and polytitanocarbosilane of 2
The blending ratio ranges from 0 to 70% and black pigment from 30 to 80%. This paint is adjusted to a viscosity that is easy to apply with a diluted solvent and applied.

The above-mentioned polytitanocarbosilane is a polydimethylsilane synthesized by dechlorination polycondensation reaction of dimethyldichlorosilane, and a small amount of a semi-inorganic polymer called polyborodiphenylsiloxane obtained by polycondensation of diphenyldichlorosilane and boric acid. Add an appropriate amount of titanium compound,
It is a tyrannopolymer that has been subjected to condensation polymerization by heating, and the tyrannopolymer mainly has a carbosilane skeleton -←5i-C←
It is an organometallic crosslinked polymer in which a polycarbo7 run moiety is crosslinked with a titanium compound and consists of basic structural units as shown in the structural formula below.

CH3-5i-CH2- (R)-0+ R) R: Cn H2
n+1 ■ i Currently, the manufacturing process of this tyrannopolymer is as follows: BisonAlthough a hot plate was described in the above example, an open functional type is used as the base material for forming the non-adhesive film of the present invention. The turntable of a microwave oven (a press-molded product made of aluminum plated steel plate) or the holder of an open toaster may be a plate or a wall surface inside the refrigerator. .

The paint whose main component is polytitanocarbosilane is 20
Ceramicized in the range of 0 to 700℃, continuously heated to 1000℃
It is known to have heat resistance up to 1400°C discontinuously.

However, it is not known that it has the same non-adhesive properties as a fluorine coat at temperatures below 400C, and various tests have shown that fluorine coat's properties at temperatures below 240-250℃
It maintained its non-adhesive properties in continuous tests at 0°C and 860°C, and lost its non-adhesive properties when the temperature reached 400°C. From this, it has been found that if a film is formed with a paint containing the above-mentioned polytitanocarbosilane as a main component, it exhibits non-stick properties in the range of 400° C. or lower.

According to experiments, 8 to 5 g of a mixed seasoning mixture of equal amounts of flour, sugar, soybean oil, sauce, tomato ketchup, and salt with a diameter of 20 mm was placed on the surface of the non-adhesive film mainly composed of polytitanocarbosilane. , 30 minutes at 250℃, a
The mixed seasoning was heated at 850° C. for 80 minutes and 850° C. to burn and carbonize, and its non-stick properties were examined.

As a result, when it comes out of the oven, the carbonized seasonings float to the surface.
It was peeling off naturally.

Furthermore, the surface after the test showed no adhesion to the adhesive cellophane tape, indicating non-adhesion.

〔effect〕

Since the present invention is configured as described above, it is possible to provide a non-adhesive film that has non-adhesive properties and heat resistance superior to those of fluororesin coatings, and has unprecedented high-temperature use and toughness. .

Agent: Patent attorney: Takeshi Sugiyama (and 1 other person) Procedural amendments August 23, 1988 [1]

Claims (1)

[Scope of Claims] 1. A non-adhesive film formed by applying a paint containing polytitanocarbosilane as a main component to a base material and curing it by heating. 2. The non-adhesive film according to claim 1, which is formed using a cooking utensil as a base material.