JPH02103252A - Flexible fluororesin composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition effective in capturing hydrogen fluoride generated by thermal decomposition, thereby suppressing the spreading of toxic gas in the case of fire, by compounding a tetrafluoroethylene-propylene copolymer with a hydrated aluminosilicate. CONSTITUTION:A flexible composition composed of a tetrafluoroethylene- propylene copolymer is compounded with 15-170 pts.wt. (preferably 30-100 pts.wt.) of a hydrated aluminosilicate based on 100 pts.wt. of the tetrafluoroethylene- propylene copolymer. The copolymer preferably has a tetrafluoroethylene/ propylene molar ratio of 55/45 and a Mooney viscosity (100 deg.C) of 30-150 from the viewpoint of electrical insulation.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a method for suppressing the spread of toxic gas in the event of a fire by capturing hydrogen fluoride generated by thermal decomposition of tetrafluoroethylene/propylene copolymer. The present invention relates to a flexible fluororesin composition.

Conventional technologies and issues Compositions using tetrafluoroethylene/propylene copolymer as a paste have excellent flexibility, electrical properties, heat resistance, flame retardance, etc., and are used as lead wires for motors, wiring for electronic devices, etc. It is widely used as a coating material in various products.

However, the tetrafluoroethylene/propylene copolymer has the problem of generating toxic hydrogen fluoride when thermally decomposed during a fire or the like.

Means for Solving the Problems The present invention overcomes the above problems by incorporating a hydrous aluminosilicate.

That is, the present invention provides a flexible composition containing a tetrafluoroethylene/propylene copolymer with 15 to 170 parts by weight per 100 parts by weight of the tetrafluoroethylene/propylene copolymer.
Provided is a flexible fluorinated antigreasing composition, characterized in that it contains part by weight of hydrated aluminosilicate to impart the ability to capture hydrogen fluoride generated by thermal decomposition of tetrafluoroethylene/propylene copolymer. It is something to do.

Function By blending hydrated aluminosilicate, flexibility and
While maintaining physical properties such as electrical properties, heat resistance, and flame retardancy, it captures toxic residue such as hydrogen fluoride generated by thermal decomposition during fires, etc., and suppresses its diffusion and spread. can do.

Exemplification of Constituent Elements of the Invention The composition of the present invention is made flexible using a tetrafluoroethylene propylene copolymer. There are no particular limitations on the type. Polymer components such as ethylene/tetrafluoroethylene, fluorinated ethylene/propylene copolymer, polyvinyl fluoride, and fluororubber-grafted fluororesin are usually 25 parts by weight or less per 100 parts by weight of tetrafluoroethylene/propylene copolymer. When used in combination with materials that improve mechanical strength, fluororesin powder or inorganic fibers are usually added in an amount of 5 to 70 parts by weight per 100 parts by weight of tetrafluoroethylene/propylene copolymer to improve tear strength. things,
Crosslinking agents such as organic peroxides, allyl compounds, iodine, etc.
Typical examples include those in which crosslinking aids such as maleimide and oximes are blended to enable steam crosslinking. Others include hydrated alumina, hydrated magnesium,
Magnesium carbonate, antimony oxide, red phosphorus, molybdenum compounds, boric acid compounds, flame retardants such as decabromodiphenyl oxide, carbon black, talc, barium sulfate, aluminum hydroxide, clay, silica, calcium carbonate, zinc sulfide, zinc oxide. Fillers such as stearic acid, lubricants such as stearic acid and sodium stearate, acid acceptors such as magnesium oxide and calcium hydroxide, imidazoles, ketone-amine condensates, phenols, hindered phenol necks, and aromatic amines. Typical examples include anti-aging agents, pigments such as titanium oxide, phthalocyanine blue, and red iron, coupling agents such as titanate, aluminum, and silane, lubricants such as stearic acid, oleic acid, and higher fatty acid metal salts, and processing aids. Examples include those that contain additives that are sometimes added to rubber and plastics, as necessary.

In addition, from the point of view of electrical insulation, the molar ratio of tetrafluoroethylene/propylene is 55/45, and the Mooney viscosity (100
It is preferable to use a tetrafluoroethylene/propylene copolymer having a temperature (°C) of 30 to 150. Further, the crosslinking treatment can also be carried out by irradiating with an electron beam or the like.

The composition of the present invention contains a hydrous aluminosilicate to impart scavenging ability. The targets to be captured are gases generated during thermal decomposition during fires, particularly toxic gases such as hydrogen fluoride generated during thermal decomposition of tetrafluoroethylene propylene copolymer.

The hydrated aluminosilicate to be used has the general formula: % formula % (where M is an alkali metal or alkaline earth metal,
X is its valence, and e, , m1n are arbitrary numbers. ), and there are commercially available products such as Zeolite (trade name). Both natural and synthetic hydrated aluminosilicates can be used. Synthetic aluminum silicate (CaO・Al2O3・2S
IO24H20) is preferably used.

The amount of hydrated aluminosilicate is
A suitable amount is 15 to 170 parts by weight, preferably 30 to 150 parts by weight, particularly preferably 30 to 100 parts by weight, per 100 parts by weight of the propylene copolymer. If the amount is less than 15 parts by weight, the scavenging ability will be poor, and if it exceeds 170 parts by weight, a composition having mechanical properties 11 that can withstand practical use cannot be obtained.

The composition of the present invention is prepared by mixing the respective components to be blended. Mixing is done using a roll mill, Banbury mixer,
This may be carried out using a suitable mixer such as a Henschel mixer. In this case, when two or more types of bonoma components are used together, it is preferable to mix them in advance, since there is a risk that the hydrated aluminosilicate may release a small amount of water at 100° C. or higher.

The composition of the present invention can be used as it is for various purposes such as insulating materials for electric wires, coating materials for various articles, and sheet products. It can also be used as a modifier for other coating materials such as ethylene-propylene copolymers.

Effects of the Invention According to the present invention, since a hydrous aluminosilicate is blended, the flexibility, electrical properties, heat resistance, and flame retardance of the tetrafluoroethylene/propylene copolymer are maintained well. It is possible to suppress the diffusion or spread of hydrogen fluoride generated by thermal decomposition of the ethylene/propylene copolymer. In addition, it can also capture other toxic gases, providing excellent pollution prevention and safety.

Examples Example 1 Aflas 150E (trade name, manufactured by Asahi Glass Co., Ltd.; 4), 100 parts (parts by weight, same hereinafter) of sonicated ethylene propylene copolymer), 2 parts of sodium stearate, 3 parts of magnesia, Diamond Black H (Product name, manufactured by Mitsubishi Monzanto Corporation; Carbon Black) 5 parts, C5-100 (Product name, manufactured by Kosei Co., Ltd.; synthetic aluminum lucium silicate) 30 parts, Percmill D (Product name, manufactured by NOF Corporation; After kneading 2 parts of TAIC (trade name, Nippon Kasei Co., Ltd.; triallyl isocyanate) at room temperature using two rolls, the mixture was press-crosslinked at 170°C for 20 minutes. A crosslinked sheet with a thickness of 2M was obtained.

Example 2 A crosslinked sheet was obtained according to Example 1 except that the amount of C3-100 used was 60 parts.

Example 3 Example 1 except that the amount of C3-100 used was 120 parts.
A crosslinked sheet was obtained according to .

Example 4 A crosslinked sheet was obtained according to Example 2, except that C8-500 (trade name, manufactured by Kosei Co., Ltd.; synthetic aluminum calcium silicate) was used in place of C8-100.

Example 5 A crosslinked sheet was obtained according to Example 2, except that SP#2300 (trade name, manufactured by Nitto Funka Co., Ltd.; natural sodium aluminum silicate) was used in place of C8-100.

Example 6 Araras 150E; 80 parts and Cefural Soft G-15
0 (trade name, manufactured by Central Glass Co., Ltd.; fluorine rubber-grafted fluororesin) were thoroughly kneaded at 170 to 180°C for 20 minutes, and to the mixture were added 2 parts of sodium stearate, 3 parts of magnesia, 1,972,825 parts of diamond, and C5. -1
60 parts of Percmill D, 2 parts of TAIC, and 5 parts of TAIC were added and kneaded at room temperature using two rolls. Then,
The mixture was press crosslinked at 170° C. for 20 minutes to obtain a crosslinked sheet with a thickness of 2 m.

Example 7 The amount used of Afrons 150E was 90 parts, and Cefrarusof 1-G-150 was replaced with 20 parts by Aphron COP C.
A crosslinked sheet was obtained in accordance with Example 6, except that 10 parts of 55A (trade name, manufactured by Asahi Glass Co., Ltd.; ethylene/tetrafluoroethylene copolymer) was used.

Example 8 The amount of C5-100 used was 50 parts, and barium sulfate 10
A crosslinked sheet was obtained in the same manner as in Example 2, except that the following procedure was performed:

Comparative Example I C3-100 was not blended and the amount of barium sulfate used was 30
A crosslinked sheet was obtained according to Example 8 except that

Comparative Example 2 Example 1 except that the amount of C8-100 used was 200 parts.
A crosslinked sheet was obtained according to .

The following tests were conducted on the crosslinked sheets obtained in the evaluation test examples and comparative examples.

[Tensile Strength, Elongation] The tensile strength and elongation at break were examined in accordance with the tensile test method of JIS K 6301.

[Amount of Hydrogen Fluoride Generated] The composition was ignited at 800°C for 30 minutes in accordance with the hydrochloric acid gas measurement method in JC853 (Japan Electric Cable Manufacturers Association standard),
The generated hydrogen fluoride was absorbed into a N15 hydroxide/1 helium solution. Then, the obtained absorption liquid was rated according to JIS K
The amount of hydrogen fluoride was measured according to the ion electrode method in 0105 (Method for analyzing fluorine compounds in exhaust gas).

From the table, it can be seen that in the examples, the amount of hydrogen fluoride generated was small, and the tensile strength and elongation were maintained well.

Patent applicant: Mitsubishi Cable Industries, Ltd.

Claims (1)

[Claims] 1. A flexible composition containing tetrafluoroethylene/propylene copolymer is blended with 15 to 170 parts by weight of hydrated aluminosilicate per 100 parts by weight of tetrafluoroethylene/propylene copolymer. A flexible fluororesin composition characterized by being endowed with the ability to capture hydrogen fluoride generated by thermal decomposition of an ethylene-propylene copolymer.