JPS59230075A - Adhesive composition for backing carpet - Google Patents

Abstract

PURPOSE:The titled composition having improved blister resistance, stability of viscosity with time, bond strength, and stability of blending, obtained by blending an adhesive composition consisting of high polymer dispersion and a filler with an organopolysiloxane and an inorganic or organic ammonium compound. CONSTITUTION:The desired composition is obtained by blending (A) high polymer dispersion (preferably carboxyl modified styrene-butadiene copolymer rubber latex, etc.) with (B) a filler (preferably ground calcium carbonate, or aluminum hydroxide), (C) an organopolysiloxane (preferably alkylene oxide modified organopolysiloxane) and (D) an inorganic and/or organic ammonium compound (e.g., ammonium nitrate, ammonium oleate, etc.). Preferably 100pts.wt. component A (solid component) is blended with 50-600pts.wt. component B, 0.003-3pts.wt. component C, and 0.05-5pts.wt. component D. USE:Tufted carpet, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a polymer dispersion with excellent blister resistance, oral viscosity stability, adhesive strength, and other polymer dispersions containing organoboridyloxane and an organic and/or inorganic ammonium compound. The present invention relates to an adhesive composition for bed lining that has stability when mixed with a liquid.

Currently, when backing tufted carpets, knitted carpets, hook carpets, etc., an aqueous dispersion in which fillers, dispersants, stabilizers, thickeners, etc. are added to a polymer dispersion as necessary is used as an adhesive. has been done.

This adhesive may be left for a long time before use, and may be exposed to high temperatures of nearly 400℃ in the summer. However, if the viscosity stability of the adhesive is poor, when it is used for carpet lining, the amount of application may become uneven during application, and the adhesive may penetrate into the pile of the carpet. This causes phenomena such as a lack of a desirable texture, a decrease in the adhesive strength of the backing fabric, and pile removal, which significantly reduces the product value. Therefore, it is very important to stabilize the oral viscosity of adhesives.

On the other hand, during the carpet drying process, when the water in the adhesive applied to the carpet evaporates, a portion of the adhesive is lifted, causing a bulge (blister) on the back side of the carpet, a so-called blister phenomenon that is often observed. However, this significantly impairs the appearance of the carpet and requires a great deal of effort to remove the blisters.

However, in recent years, in order to increase productivity in carpet manufacturing, drying at high temperatures and high wind speeds has become commonplace.Also, due to the shortage of jute fabrics, it has become common to dry carpets with low breathability and water absorption. There is a transition to polypropylene products. As a result, the blister phenomenon has become more likely to occur, and this has become a very serious hindrance in the carpet manufacturing process.

Furthermore, in addition to blister resistance and viscosity stability over time, depending on the type of carpet, different polymer dispersions are mixed to obtain the desired texture, so mixing with other polymer dispersions is also important. Stability is strongly required.

Adhesive compositions for carpet lining include, for example,
As seen in JP-A-44191 and JP-A-56-149478, organopolysiloxane and nonionic surfactants are sometimes used to improve blister resistance, water resistance, and adhesive strength. However, in this case, when different types of polymer dispersions are mixed for the purpose of adjusting the texture of the carpet, the viscosity of the composition suddenly increases and solidification occurs, making it difficult to obtain a stable composition.Therefore, improvements are needed. There is.

. As a result of repeated studies to develop an adhesive composition for carpet backing that has excellent blister resistance, adhesive strength, viscosity stability, and mixing stability, the present inventor surprisingly found that a small amount of ammonium compound When used in combination, the effectiveness of organosiloxane is dramatically enhanced, resulting in improved blister resistance and
It was discovered that it was possible to obtain a target composition that had good stability over time, good adhesive strength, and excellent mixing stability, and based on this knowledge, the present invention was completed.

The object of the present invention is to provide an adhesive composition for carpet lining comprising a polymer dispersion and a filler, in which the adhesive composition is blended with an organopolysiloxane and an inorganic and/or organic ammonium compound. This can be achieved by

Polymer dispersions used in the present invention include styrene-butadiene copolymer rubber latex, methyl memethacrylate-butadiene copolymer rubber latex, acrylonitrile loop mediene copolymer rubber latex, vinyl chloride polymer latex, and ethylene-vinyl chloride copolymer rubber latex. Common latexes that can be used for carpet backing include coalescent latex, ethylene-vinyl acetate copolymer latex, and natural rubber latex.

Note that these latexes may contain functional groups such as carboxyl groups, hydroxyl groups, amide groups, N-methylol groups, glycidyl groups, or sulfonic acid groups. Usually the monomers containing these functional groups are present in an amount of 0.5 to 10% by weight in the copolymer. Particularly preferred is a latex modified with carboxyl groups.

In the present invention, the polymer dispersion can be used alone or in combination.

The organoborisiloxane used in the present invention is
When this compound is added to latex, it is stable at low temperatures, but when heated above a certain temperature, it is a so-called heat-sensitive coagulant that rapidly and uniformly gels the entire latex. For example, special public service 1976-2
No. 1427, Japanese Patent Publication No. 19604 (1977), Japanese Patent Publication No. 1960 (1977)
24556, US Pat. No. 3,246,559, US Pat. No. 3,255,140, and British Patent No. 1,141,867. A particularly preferred compound is an alkylene oxide-modified organoborisiloxane. A range of 5 to 6 parts by weight of OO is preferred. 0.0
If it is less than part by weight of OS, the blister resistance will not be improved even if it is used in combination with an ammonium compound. If it exceeds 3 parts by weight, the stability of the viscosity over time of the adhesive composition will be poor, and the stability of mixing with other latexes will also be poor, so it is not practical, preferably 0.005 to 2 parts by weight. It is.

The ammonium compounds used in the present invention include ammonium chloride, ammonium nitrate, ammonium sulfate, ammonium carbonate, other common inorganic ammonium compounds, ammonium acetate, ammonium propionate, ammonium oleate, ammonium maleate, and common ammonium carboxylates. Examples include ammonium compounds of general organic carboxylic acids or derivatives thereof, such as ammonium salts of N-substituted carboxylic acids, ammonium salts of polycarboxylic acids, and ammonium salts of ethylenediamine-tetraacetic acid. The amount used is
Normally 0.05 to 5 per 100 parts by weight of solid content of polymer dispersion
Parts by weight ranges are preferred.

If it is less than 0.05 parts by weight, a sufficient synergistic effect with the organoborisiloxane compound cannot be obtained, and if it exceeds 5 parts by weight, the stability of the viscosity over time becomes poor. Preferably 0.
It is 1 to 3 parts by weight.

Examples of the filler used in the present invention include heavy calcium carbonate, aluminum hydroxide, clay, Merck, and light calcium carbonate. Of these,
Preferably, heavy calcium carbonate or aluminum hydroxide, which are common for carpet treatments. The amount used is usually 950 to 600 parts by weight per 100 parts by weight of solid content of the polymer dispersion.

If it is less than 50 parts by weight, the blister resistance is poor;
If it exceeds 600 parts by weight, it becomes difficult to obtain a satisfactory adhesive strength. Preferably it is 150 to 500 parts by weight.

The adhesive composition of the present invention may further include a dispersant, if necessary.
Conventional ingredients such as stabilizers, anti-aging agents, vulcanizing agents, vulcanization accelerators, defoamers, thickeners and pigments may also be included.

In particular, nonionic interfaces such as ordinary polyoxyethylene alkyl ether type, polyoxyethylene alkylphenyl ether type, and polyoxyethylene alkyl ester type are used to improve workability in adjusting adhesive compositions and improve oral viscosity stability. An active agent can be used in combination, but in the present invention, there is usually no need to use it in combination, and even when used in combination,
The amount is desirably 95 parts by weight or less per 100 parts by weight of the solid content of the polymer dispersion. If it exceeds 5 parts by weight, the effects of the present invention, such as a decrease in adhesive strength and a decrease in blister resistance, may be difficult to obtain, which is not preferable.

The adhesive composition of the present invention is applicable to all fabrics or fabrics whose back side is treated with a polymer dispersion to bond piles or bond secondary base fabrics to carpets, such as tufted carpets, knitted carpets, and hook carpets. It can be applied to carpets made of nonwoven fabric. The composition can be applied to carpets in any manner, including white backing, mesh pasting, jute pasting, and application of a secondary backing material such as a synthetic material such as polypropylene. It is also possible to use it in a foamed state, such as as a floss backing, for the above purpose.

Next, the present invention will be specifically explained using examples.

All parts of ingredients in each example are based on solid content weight.

Example Adding water, 0 to 6 parts by weight of a nonionic surfactant, 0.002 to 3.5 parts by weight of organoborisiloxane, and 120 to 600 parts by weight of heavy calcium carbonate to the polymer dispersion,
Various adhesive compositions shown in Table 1 were obtained by adjusting the viscosity with sodium polyacrylate. The oral viscosity of these compositions was measured using a kB type viscometer.

On the other hand, the base fabric of the obtained composition is polypropylene and the pile is nylon (filament loop pile).

15 for tufted carpet (1/8 inch gauge product)
kl (WICT) 7m-'', then backed with 9 oz. jute, and after roll crimping,
The adhesive was placed in a dryer at a temperature of 160 C and a hot air velocity of 8 rrL for 7 seconds to dry for 10 minutes, and then the state of blistering of the adhesive was observed with the naked eye. The results are shown in Table 1.

The test methods for adhesive strength and mixing stability are as follows.

Adhesive Strength Using the same raw carpet fabric and jute as above, apply the adhesive composition at a rate of 1.4 kg (VnnT)/glue, and press the raw carpet fabric and jute together with a roll. After drying for 15 minutes in a dryer at a temperature of 130c and a hot air flow rate of 2 rises/second,
Leave for 24 hours at 2DC and humidity of 60 degrees. The adhesive strength is expressed as the jute peel strength measured according to L-1021 from J.

Mixing Stability Table 1 The adhesive composition of Experiment No. 1 in which the polymer dispersion was replaced with another polymer dispersion and each adhesive composition listed in Table 1 were mixed at 181 (weight ratio). ) and observe the change in state of the mixed composition after 7 days at 20C.

Table 1 (continued) +5111 Nippon Zeon product N i pot L
When using X-436.

I[I Same as above N1polLX 45
When using 1.

Experiment numbers 1, 9 and 10 and experiment numbers 2 to 8 in Table 1. Comparison with Examples 1 and 11 to 13 shows that the blister resistance is significantly improved by using an organosiloxane and an ammonium compound in combination.

Patent applicant: Zeon Corporation

Claims (1)

[Claims] A carpet backing adhesive composition comprising a polymer dispersion and a filler, wherein the adhesive composition contains an organoborisiloxane and an inorganic and/or organic ammonium compound. agent composition 0