JPS58104935A - Flame-retardant backing composition for carpet - Google Patents

Abstract

PURPOSE:To prepare a composition having excellent flame-retarding and reinforcing effect to a carpet, by compounding an emulsion of a copolymer containing vinyl chloride, ethylene and vinyl acetate at specific ratios with a (meth) acrylic acid ester (co)polymer emulsion at a specific ratio. CONSTITUTION:(A) 90-10pts.wt. of a copolymer emulsion of vinyl chloride, ethylene and vinyl acetate wherein the weight ratios of the above monomers are (30-95):(5-70):(55-0), or its modified product, is compound with (B) 10- 90pts.wt. of a poly(meth)acrylic acid ester emulsion or (meth)acrylic acid ester copolymer emulsion having a glass transition point of <=10 deg.C. The composition is adjusted to a solid content of 20-80wt% and a viscosity of 2,000-30,000cps, and coated to a carpet at a rate of 0.1-2kg/m<2> in terms of solid.

Description

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

Traditionally, carpets with various textures and structures have been used as carpets, but in recent years, due to the simplicity and economy of the manufacturing process, carpets with piles embedded in the base fabric called tufftit carpets, and carpets with webs have been used. Needle punch carpets, which are mechanically entwined by a method called needle punching, are increasingly being used.

By the way, since these rugs are simply made of piles that are tied together, their shape is unstable under the conditions of the house, and the piles easily fall off, making them unsuitable for practical use. . Therefore, a method of reinforcing the rug by impregnating or spreading rubber or synthetic resin on the front or back surface of the rug 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 adding fillers and other compounds to the back side of the rug. Or,
If necessary, bleached fibers can be laminated, thermo-movable composite M,
This is a method for forming a film of Is Th. However, as rugs have come to be used for a variety of purposes, including houses, vehicles, aircraft, and ships, methods of making rugs flame retardant have been considered to prevent fire accidents. In practice, the most advantageous method is to make the entire rug flame retardant by adding a flame retardant to the backing composition that is applied to the back of the rug for reinforcement. The most popular method is to use a backing composition made of rubber latex mixed with aluminum hydroxide or the like as a flame retardant. However, there is a limit to making the entire carpet flame retardant using this method, and it is insufficient, especially when a high degree of flame retardance is required for wheels.

：1 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 hydroxide, which is a flame agent, but in this case, even though it is effective for flame retardation, the original reinforcing effect of the rug, such as preventing pile thread removal and stabilizing the shape, is This is because it will be seriously damaged.

As described above, in the conventional method, it is difficult to simultaneously satisfy the effect of making the rug into a lion and reinforcing the rug.
There has been a strong demand for a flame-retardant backing composition that provides sufficient flame retardancy without reinforcing the rug.On the other hand, emulsions containing vinyl chloride have excellent performance as flame-retardant backing compositions. However, it has a poor texture, which limits its use in cases where such properties are required.

In view of these circumstances, the present inventors have conducted extensive research into flame-retardant packing compositions that have excellent reinforcing effects and texture for rugs, and can simultaneously achieve flame retardation.

As a result, poly(meth)acrylic acid ester emulsion carbonate or (meth)acrylic acid ester emulsion having a glass transition point of 10°C or lower was added to a copolymer resin having a specific monomer composition ratio of □vinyl chloride, ethylene, or vinyl acetate. ) It was discovered that a composition containing acrylic acid ester co-polymerized emulsilone in a specific ratio was extremely effective, and the present invention was completed.

That is, the present invention provides a monomer composition (1 m ratio i (80 to
9ms? 3~? 90 to 10 parts by weight of a copolymer emulsion having a molecular weight of 0255 to 0 or a modified product thereof and a poly(meth)acrylic acid ester emulsion or (meth)acrylic acid ester copolymer having a glass transition point of 10°C or less This is a burning material for rugs containing 10 to 90 parts by weight of Emul 912 as a binder component.

Natural or synthetic fibers such as wool, leishon, polyacrylonitrile, boria maize, polyester, and polypropylene are used as the II woven material for the rug made of woven or non-woven fabric according to the present invention, and the structure of the rug is There is no limitation to the original, and it can be what is generally called tufted carpet or needle punch carpet.

An important part of the composition of the present invention is as a backing material (poly(vinyl chloride-ethylene copolymer emulgene, vinyl chloride-ethylene-vinyl acetate copolymer or a modified product thereof) having a glass transition point of 10°C or lower). Meta)
90 to 10 parts by weight of acrylic ester emulsion or (meth)acrylic ester copolymer: 10 to I
In order to achieve the object of the present invention, it is particularly important that the composition of vinyl chloride in the copolymerization of the vinyl chloride is 80 to 96% by weight. Outside this composition range, for example vinyl chloride
If it is less than % by weight, the composition will have insufficient flame retardant effect on the rug. In addition, copolymer emulsion (6) and poly(methacrylic acid ester emulsion or (meth)acrylic-ester copolymer (B) in the present invention)
) If C~ is less than 10 parts by weight, the flame retardant effect will be insufficient. On the other hand, if 8 is more than 90 parts by weight, the texture of the resulting composition will be insufficient. Q. Vinyl chloride-ethylene copolymer or vinyl chloride-vinyl acetate-ethylene copolymer used in the present invention that cannot achieve the purpose of the present invention. They may be modified with functional monomers such as acrylamide, methacrylamide, N-methylolacrylamide, N-butoxymethylacrylamide, acrylic acid, glycidyl methacrylate, and hydroxyethyl acrylate.

As the poly(meth)acrylic ester emulsion or (meth)acrylic ester copolymer emulsion having a glass transition point of 10° C. or less in the present invention, commonly used ones can be used, such as methyl acrylate, Poly(meth)acrylic acid ester ema 1 such as ethyl acrylate and hexyl methacrylate
■□・11'・ Rujisoone, methyl acrylate, ethyl 7-acrylate,
Copolymer emulsions of (meth)acrylic acid esters such as butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, hexyl methacrylate, and octyl methacrylate, or (
Examples include copolymer emulsions of one type or two or more meth)acrylic acid esters and one type or two or more S types such as styrene, vinyl acetate, vinyl chloride, tjL vinylidene ethylene, (meth)acrylic acid, etc. It will be done.

Extenders and thickeners can be added to the binder component of the present invention as needed. In this case, the extender pigments include calcium phosphate, hydroxide, etc., which are used in conventional rug backing compounds. Inorganic materials such as aluminum, kaolin clay, and talc can be used, and examples of thickeners include water-soluble polymers such as sodium polyacrylate, carboxymethyl cellulose, and polyvinyl alcohol.

,,' If necessary, a commonly used flame retardant can be added to the binder component of the present invention. In other words, the flame retardant in this case is not particularly limited, and may include conventionally known flame retardants such as phosphate esters, halokene-containing phosphate esters, ammonium polyphosphate, antimony trioxide, zinc borate, barium metaborate, and aluminum hydroxide. It may be a flame retardant, and the amount of such flame retardant may be % of the present invention.
It is selected within the range that does not damage the mold. Other auxiliary agents such as colorants and fillers may also be added as necessary.

The flame retardant backing composition for rugs of the present invention typically has a solids content of 2
It is adjusted to have a viscosity of 0 to 80% by weight and a viscosity of 2,000 to 1000 to 100 poise.

For actual use, apply the material to the rug using a known device or method such as a roll coater, flow coater, curtain coater, or spray.
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 Kf/2 is appropriate.

Further, if necessary, the foam may be foamed to a degree of 1.1 to 1.5 times the foam and then applied.

In addition, in order to give y a special function such as a high degree of shape stability or formability, linen fabric may be layered and bonded after being applied, or thermoplastic synthetic resin such as polyethylene may be melt-processed after drying. It is also effective to perform secondary processing such as forming a film.

Thus, the rug treated with the flame-retardant bunking composition according to the present invention has a strong fixation of the rug, good adhesion to secondary processing materials, and at the same time has very good retardant properties. The present invention will be explained below with reference to examples.
8 Hinyl chloride-ethylene-atalyl T-mide copolymer emulsion with a seven-mer composition ratio (weight ratio) of vinyl chloride, ethylene, and acrylamide of 78:19:8, (solid content 5
n- with a glass transition point of -19.1°C
Butyl acrylate-vinyl acetate-ethylene copolymer emulsion (solid content 48.2% by weight) was mixed in the proportions shown in Table 1, and polypropylene fibers were applied to a needle punch carpet using a spray method, followed by hot air blowing at 120°C. It was dried in a circulating dryer for 20 minutes. At this time, the coating amount of the above composition was 150 f/equal as solid content.

The performance of the obtained carpets is shown in Table 1, Examples 4 to 4.
In 6 si+th Examples 1 to 8, the monomer composition ratio of vinyl chloride, vinyl acetate, and ethylene was 51:4 instead of the vinyl chloride-dethylene-acrylamide copolymer emulsion! Near vinyl chloride-vinegar 11? All procedures were carried out in the same manner as in Examples 1 to 8, except that a nylon-ethylene copolymer emulsion (solid content: 49.6% by weight) was used.

The performance of the obtained carpet is shown in Table 1.

Example 7 In Examples 4 to 6, the vinyl chloride-vinyl acetate-ethylene copolymer emulsion was prepared using an emulsion in which the composition ratio of vinyl chloride, vinyl acetate, and ethylene was 87:6:57.
Example 4-6
I did the same thing.

The performance of the obtained carpet is shown in Table 1.

Example 8 In Examples 1 to 8, instead of the n-butyl acrylate-vinyl acetate-ethylene copolymer emulsion with a glass transition point of -19.1°C, styrene-with a glass transition point of 2.5°C was used.
The same procedures as in Examples 1 to 8 were carried out except that the ethyl acrylate copolymer emulsion was used.

The performance of the obtained carpet is shown in Table 1.

Comparative Examples 1-4 Examples 1-8, Examples 4-6 and \Example 8□i:・
,・EL':)Lr 1fL7:7-au1,1゜ai
F both 1! All Examples except that a combined emulsion, a hinyl chloride-vinyl acetate-ethylene copolymer emulsion, an n-butyl acrylate-hinyl acetate-ethylene copolymer emulsion, and a styrene-ethyl acrylate copolymer emulsion were used as binder components. 1-8. I did the same thing.

The performance of the obtained carpet is shown in Table 1.

- In terms of pet performance, the burning rate is JI8D-1
The texture was determined by conducting a horizontal combustion test according to the method specified in 2α1-1977, and the softness was evaluated by actual touch, and the results were displayed on a scale of 1 to 10. . Here, 1 means very hard and not flexible, and 10 means very soft and extremely soft to the touch.

Claims (1)

[Claims] 90 to 10 parts by weight of a copolymer emulsion or a modified product thereof having a ratio of 95:6 to 70:55 to 0 and a poly(meth)acrylic acid ester emulsion or (meth)acrylic acid having an average glass transition point of 10°C or less A flame-retardant backing composition for a rug, comprising 10 to 90 parts by weight of an ester copolymer emul.