JPS63210165A - Flame-retardant polymer composition - Google Patents

Abstract

PURPOSE:To obtain a flame-retardant polymer compsn. which has sufficient resistance to water and acids and can withstand the use under high temp. and humidity conditions, by adding an inorg. powder treated with an amino acid or its derivative to a polymer. CONSTITUTION:A polymer compsn. is obtd. by adding 50-200pts. inorg. powder treated with an amino acid and/or its derivative to 100pts. polymer. Examples of the amino acid are aspartic acid, aminobutyric acid, alanine, glycine, glutamic acid, crystine, lysine, etc. Examples of the amino acid derivative are N-lauryl- DL-aspartic acid beta-lauryl ester, L-glutamic amide, N'-lauryl-L-lysine, etc. As the inorg. powder, magnesium hydroxide is preferred. The amount of the amino acid or its derivative to be used for the treatment of the powder is 0.05-10pts. per 100pts. inorg. powder.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a flame retardant resin composition.

[Prior Art] As a means of imparting flame retardancy to various resins, metal oxides and carbonates such as magnesium hydroxide, basic magnesium carbonate, calcium carbonate, and hydrotalcite are added to resins. It is. In this case, from the viewpoint of effectiveness, these additives are generally used in fairly large amounts.

[Problems to be solved by the invention] However, since these additives are generally hydrophilic,
Dispersion in the resin is poor and the inherent physical properties of the resin are significantly impaired.

In addition to the above-mentioned drawbacks, magnesium hydroxide and basic magnesium carbonate also have the drawback of poor acid resistance.

To address these drawbacks, improve dispersibility in resin, maintain physical properties,
Surface treatment with anionic surfactants has been proposed for the purpose of improving acid resistance. (Tokuko Sho 57-28421
However, even after such treatment, the results are still not fully satisfactory, and in particular, the acid resistance is still quite unsatisfactory.

[Means for Solving the Problems] The present inventor has eliminated the above-mentioned drawbacks of the prior art, and created a flame retardant product that has sufficient water resistance and acid resistance, and is sufficiently durable for use even under high temperature and high humidity conditions. As a result of various studies and examinations aimed at obtaining a resin composition, it was discovered that the above object could be achieved by adding inorganic powder such as magnesium hydroxide treated with amino acids to the resin. . Thus, the present invention provides an inorganic powder treated with amino acids and/or derivatives thereof in an amount of 5 to 100 parts of resin.
It is an object of the present invention to provide a flame-retardant resin composition in which 0 to 200 parts of the present invention are added.

Examples of amino acids used in the present invention include aspartic acid, aminobutyric acid, alanine, glycine, glutamic acid, cystic acid, and lysine.

In addition, amino acid derivatives are generally those in which a part of the amino group in the amino acid is amidated with a 08 to C22 long chain fatty acid and/or a carboxylic acid group is esterified with a C8 to C22 long chain alcohol, Among these, for example, N-
Lauryl-DL-aspartic acid-βφ lauryl ester, L-glutamic acid amide, N ■-Laurolyl-L
- Lysine is preferred.

Examples of the inorganic powder used in the present invention include magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, and nodrotalside, with magnesium hydroxide being particularly preferred. The amount of amino acids and their derivatives treated with these inorganic powders is 0.05 to 10 parts, preferably 0.05 parts to 100 parts of the inorganic powders.
．． 1 to 2 parts is appropriate.

There is no particular restriction on the treatment method, for example, a dry method in which inorganic powder is placed in a Henschel, a treatment agent is added directly or diluted with an appropriate solvent, and thoroughly stirred, or a wet slurry method is used as appropriate. Can be adopted. In addition, an integral blending method, in which a processing agent is added at the same time as the inorganic powder and resin are kneaded, may also be adopted.

Next, examples of the resin used in the present invention include various thermoplastic resins and rubbers.

Examples of thermoplastic resins include polyolefin, polyamide, polycarbonate, polystyrene, acrylic resin, ABS resin, polyphenylene sulfide, urethane, ethylene vinyl acetate, etc., and examples of rubbers include natural rubber, isoprene, butadiene, styrene butadiene, Chloroprene, nitrile rubber, butyl rubber,
Examples include chlorosulfonated polyethylene, polysulfide rubber, acrylic rubber, and ethylene propylene rubber. These resins may be used alone or in combination, or may be copolymerized if desired.

There is no particular restriction on the means for mixing these resins and the treated inorganic powder, and any suitable means may be used as long as it is capable of uniformly mixing them. Examples include extrusion kneading, roll kneading, and kneading using a Banbury mixer. It is also possible to obtain a molded article, in which case injection molding, extrusion molding, press molding, etc. can be employed.

Furthermore, in the present invention, other appropriate additives may be used in combination with these resin compositions as long as they do not depart from the purpose of the present invention. Examples of such additives include fillers such as glass fiber, pigments and colorants such as carbon black and titanium oxide, antioxidants such as dilaurylthiodipropionate, lubricants such as zinc stearate, and 2-hydroxy-4. -Ultraviolet absorbers such as octoxybenzophenone and the like.

[Examples] The test methods used in the following Examples are as follows.

Water resistance: A sample was suspended in a saturated steam vapor phase and brought into contact with CO2 gas, and the reactivity to CO2 was evaluated by changes in appearance and weight.

Tensile test: According to JIS-7113.

Measurement of torque Torque was measured when the resin and powder were kneaded at 150° C. using a Nilapoplast mill (manufactured by Toyo Seiki ■) and used as a measure of workability.

Examples 1 to 3 For 1 kg of magnesium hydroxide with an average particle size IIL, N
10 g (Example 1), 20 g (Example 2), and 50 g of lauryl-DL-aspartic acid β-lauryl ester, respectively.
(Same 3) High-speed stirring treatment was performed at room temperature for 30 minutes using an angel mixer. Each of these is made of 100% low density polyethylene.
1, 170 parts and 2 parts of carbon black were mixed in a roll, and the mixture was press-molded and evaluated. The test results are shown in Table 1.

Examples 4 to 8 10 g (Examples 4 to 6) and 20 g (Examples 7 and 8) of N lauryl-○L-aspartic acid β-lauryl ester to 1 kg of magnesium hydroxide with an average particle size of 1 L, and Table 1 The other additives shown in 2 were used in combination, and the mixture was stirred using an Enshell mixer in the same manner as in Example 1. Then, in the same manner as in Example 1, each was mixed with resin, molded, and evaluated. The test results are shown in Table 1.

Comparative Example 1 Evaluation was carried out in the same manner as in Example 1 except that 20 g of stearic acid was used for 1 kg of magnesium hydroxide having an average particle size of 1 L. The results are shown in the table.

Comparative Example 2 Table 1 shows the results of evaluation in the same manner as in Comparative Example 1 except that 20 g of oleic acid was used in place of stearic acid in Comparative Example 1.

Comparative Example 3 1 kg of magnesium hydroxide with an average particle size of 1 l was made into a slurry with 10 g of water, a solution of 20 g of sodium stearate was added thereto, stirred for 1 hour, filtered, dried and crushed. It was mixed with the resin of Example 1 and evaluated in the same manner as in Example 1. The results are shown in Table 1.

Table 1

Claims (1)

[Scope of Claims] 1. A flame-retardant resin composition prepared by adding 50 to 200 parts of inorganic powder treated with amino acids and/or derivatives thereof to 100 parts of resin. 2. The resin composition according to claim 1, wherein the amino acids are aspartic acid, aminobutyric acid, alanine, glycine, glutamic acid, cysteic acid, and lysine. 3. Amino acid derivatives convert some of the amino groups in amino acids into C
The resin composition according to claim 1, wherein the resin composition is amidated with a long chain fatty acid of C_8 to C_2_2 and/or esterified a carboxylic acid group with a long chain alcohol of C_8 to C_2_2. 4. Amino acid derivatives are N-lauryl-DL-aspartic acid-β lauryl ester, L-glutamic acid amide,
The resin composition according to claim 1, which is N^-laurolyl-L-lysine. 5. The resin composition according to claim 1, wherein the inorganic powder is magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, or hydrotalcite. 6. The resin is polyolefin, polyamide, polycarbonate, polystyrene, acrylic resin, ABS resin, polyphenylene sulfide, urethane, ethylene vinyl acetate, natural rubber, isoprene, butadiene, styrene-butadiene rubber, chloroprene, nitrile rubber, butyl rubber, chlorosulfonated polyethylene, polysulfide rubber,
The resin composition according to claim 1, which is acrylic rubber or ethylene propylene rubber. 7. The resin composition according to claim 1, wherein the processing amount of the amino acid and/or amino acid derivative is 0.05 to 10 parts per 100 parts of the inorganic powder.