JPS58152037A - Flame-retardant packing composition for rug - Google Patents

Abstract

PURPOSE:A composition, prepared by incorporating an emulsion of a copolymer consisting of vinyl chloride, ethylene and vinyl acetate in a specific composition ratio with a synthetic rubber type latex and a flame retardant plasticizer, and having improved reinforcing effect, flame retardancy, feeling and rubber elasticity. CONSTITUTION:A flame-retardant packing composition prepared by incorporating 100pts.wt. composition consisting of (A) 95-40pts.wt. emulsion of a copolymer consisting of vinyl chloride, ethylene and vinyl acetate at (30-95):(5-70): (55-0) monomeric composition weight ratio or a modified material thereof with (B) 60-5pts.wt. synthetic rubber type latex and (C) 2-35pts.wt. flame-retardant plasticizer. A butadiene type copolymer, e.g. styrene-butadiene, particularly strongly anionic copolymer modified with carboxyl or acid amide groups, is preferred for the component (B).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to flame retardant backing compositions for rugs (including carpets or areas, mat cushions or sheets, etc.).

Traditionally, carpets with various textures and structures have been used, but in recent years, for reasons such as ease of manufacture and economic efficiency, carpets with piles embedded in the base fabric called tufted carpets have been used. The use of carpets called needle punch carpets, in which webs are mechanically entwined by a method called needle punching, is becoming more common.

However, since such rugs are simply made of piles embedded or intertwined, their shape is unstable in that state, and the piles easily fall off, making them unsuitable for practical use. Therefore, a method of reinforcing the rug by impregnating or coating the front or back surface of the rug with rubber or synthetic resin has been adopted. The most common of these reinforcement techniques is to apply a backing composition made by using natural or synthetic rubber latex as a backing material and blending this with fillers and other compounds to the back side of the rug, or Depending on the requirements, this method involves further laminating woven fabrics or forming a thermoplastic synthetic resin film. However, as rugs have come to be used for a variety of purposes including houses, vehicles, aircraft, and ships, there has been a demand for rugs to be flame retardant to prevent fire accidents.

Although methods such as making the fiber material of the rug flame retardant have been considered to make such rugs flame retardant, a backing composition that is applied to the back side of the rug for reinforcement is considered to be more practical and advantageous. This is a method of making the entire rug flame retardant by adding a flame retardant to the material.The most popular method for this method is backing with a composition made of rubber latex mixed with a flame retardant such as aluminum hydroxide6. It's a method.

However, there is a limit to making the entire rug flame retardant using this method, and it is insufficient especially when a high degree of flame retardancy is required, such as for vehicles.

This is because the backing material itself, such as natural or synthetic rubber latex, is easily combustible, so in order to make the rug flame retardant, it is necessary to make the backing material itself flame retardant. It is necessary to increase the amount of aluminum etc., but in this case, even if it is effective for flame retardation, the original reinforcing effect of the rug, such as preventing pile thread removal and stabilizing the shape, will be significantly impaired.

In this way, with conventional methods, it is difficult to simultaneously make the rug flame retardant and reinforcing the rug.
There is a strong need for a flame retardant backing composition that provides sufficient flame retardancy without sacrificing the reinforcing effect on the rug.

On the other hand, emulsions containing vinyl chloride have excellent performance as flame-retardant backing compositions, but they lack texture and rubber elasticity, which limits their use in cases where poor properties are required. .

Compositions made of emulsions containing vinyl chloride and synthetic rubber latex have flame retardant properties, texture, and rubber elasticity, but as the proportion of synthetic rubber latex increases, stricter flame retardance is required. There are limits to how much you can do.

In view of the circumstances, the present inventors have conducted extensive studies on a flame-retardant backing composition that has excellent reinforcing effects and texture for rugs, has rubber elasticity, and can simultaneously achieve flame retardancy.
It has been found that a composition containing a copolymer emulsion having a specific monomer composition ratio of vinyl chloride, ethylene, or even vinyl acetate, a synthetic rubber latex, and a flame-retardant plasticizer in a specific ratio is extremely effective. Heading: The present invention has been completed.

That is, in the present invention, the monomer composition (weight ratio) of vinyl chloride, ethylene, and vinyl acetate is 80 to 95:6 to 70.
Flame retardant plasticizer per 100 parts by weight of a composition consisting of 95 to 40 parts by weight of an emulsion (as a solid content) of a copolymer or a modified product thereof having a ratio of 55 to 0 and 60 to 5 parts by weight of a synthetic rubber latex. This is a flame retardant composition for rugs, containing 2 to 86 parts by weight of.

In the present invention, natural or synthetic fibers such as wool, rayon, polyacrylonitrile, polyamide, polyester, l-propylene, and nylon are used as the fiber material for the rug made of woven or nonwoven fabric, and there are no particular limitations on the structure of the rug. Instead, it can be what is generally called tufted carpet or needle punch carpet.

An important part of the composition of the present invention is that as a backing material (gradient vinyl ethylene copolymer emulsion or vinyl chloride-ethylene-vinyl acetate copolymer or a modified product thereof and (B) a synthetic rubber latex of 96 to 40: 6
The flame retardant plasticizer is added in an amount of 2 to 35 parts by weight per 100 parts by weight of the composition in a proportion of 0 to 5 (parts by weight). It is essential to achieve the object of the present invention that the composition of vinyl chloride is 80 to 950 to 95 parts by weight. If the composition is outside this range, for example if the amount of vinyl chloride is less than 80% by weight, the flame retardant effect of the composition on the rug will be insufficient. In addition, copolymer emulsion in the present invention) and synthetic rubber latex (B
Similarly, if the amount of the compound is less than 40 parts by weight, the flame retardant effect will be insufficient, while if the amount exceeds 95 parts by weight, the rubber elasticity of the composition will be insufficient. cannot achieve the purpose.

Furthermore, a particularly important part of the present invention is that 2 to 85 parts by weight of a flame retardant plasticizer is added to 100 parts by weight of the composition (phase and (B)) to increase flame retardancy and texture. If the amount of flame retardant plasticizer added is less than 2 parts by weight, the effect of increasing flame retardancy and texture will be small, and if it exceeds 86 parts by weight, migration of the flame retardant plasticizer will occur, causing problems. arise.

The vinyl chloride-ethylene copolymer or vinyl chloride-vinyl acetate-ethylene copolymer used in the present invention contains up to 10% by weight of acrylamide, methacrylamide, N - They may be modified with functional additives such as methylol acrylamide, N-butoxymethyl acrylamide, acrylic acid, glycidyl methacrylate, hydroxyethyl acrylate.

As the synthetic rubber latex used in the composition of the present invention, butadiene copolymers such as styrene-butadiene, acrylonitrile-butadiene, methyl methacrylate-butadiene, etc. may be used. In particular, those having strong anionic properties and being modified with carboxy or acid amide are preferred.

Examples of the flame retardant plasticizer of the present invention include tricresyl phosphate, triallyl phosphate, cresyl phenyl phosphate, xylenyl diphenyl phosphate, and tricylenyl phosphate. Examples include phosphoric acid ester type and halogen-containing phosphoric acid ester type.

If necessary, an extender pigment or a thickener can be added to the binder component of the present invention consisting of (A) and (B). Inorganic substances such as calcium carbonate, aluminum hydroxide, kaolin, clay, and talc can be used, and thickeners include water-soluble polymers such as polyacrylic acid sorta, carboxymethyl cellulose, and polyvinyl alcohol.

Furthermore, in addition to the flame retardant plasticizer used in the present invention, a commonly used flame retardant may be added to the binder component of the present invention, if necessary. In other words, the flame retardant in this case may be a conventionally known flame retardant such as ammonium polyphosphate, antimony trioxide, zinc borate, barium borate, aluminum hydroxide, etc. The blending amount is selected within a range that does not impair the characteristics of the present invention. Other auxiliary agents such as colorants and fillers may also be added as required.

The flame retardant backing composition for rugs of the present invention typically has a solids content of 2
Adjust the amount to be about 0 to 800 to 80 parts by weight gooo to 80,000 centipoise.

In actual use, the flame-retardant baking composition is coated using a roll coater or a flow coater. -, curtain cork-,
Apply to the rug using known equipment and methods such as spraying, and dry using hot air, infrared rays, etc. There is no particular limit to the amount of coating at this time, but in order to obtain stable results, a solid content of 0.1 to 2 per liter is appropriate.

Further, if necessary, it can be foamed to a volume of 1.1 to 1.5 times the sustenance and then applied.

Thus, the rug treated with the flame-retardant backing composition according to the present invention has a firmly fixed pile, good adhesion to secondary processed materials, and at the same time has excellent flame-retardant texture and rubber elasticity. It has the following characteristics and can be advantageously used as rugs for houses, vehicles, aircraft, etc.

The present invention will be explained below using examples.

Examples 1 to 9, Comparative Examples 1 to 5 Vinyl chloride-ethylene-acrylamide copolymer emulsion or vinyl chloride-vinyl acetate-ethylene copolymer emulsion and styrene-butadiene and tricresyl phosphate in proportions shown in Table 1 The mixture was mixed with a polypropylene fiber needle punch carpet using a spray method, and dried in a hot air circulation dryer at 120℃ for 20 minutes.
Dry for a minute. At this time, the coating amount of the above composition was 150tyQ in terms of solid content. Table 1 shows the performance of the obtained carpet.

In terms of carpet performance, the combustion rate is
1201-1977 by conducting a horizontal combustion test.

The quality of the texture was evaluated by actual touch, and the results were expressed on a scale of 1 to 10. child\
1 means that the material is very hard and has no texture, and 1O indicates that it is very soft and has an extremely high texture.

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Claims (1)

[Claims] (A) Emulsion of a 6 copolymer or its modified product in which the monomer composition (weight ratio) of vinyl chloride, ethylene, and vinyl acetate is 80 to 95:5 to 70 = 55 to 0.
40 Weight 11 (B) Synthesis-f A-based Utex 6
(C
) Flame-retardant backing composition for rugs containing 2 to 85 parts by weight of a flame-retardant plasticizer