JPS58136645A - Sol composition for interior finish material - Google Patents

Abstract

PURPOSE:To provide the titled compsn. suitable for use in the production of an interior finish material for automobile, a surfacing material for furnishings, etc. by blending a specified nonionic surfactant and an epoxy resin with a paste vinyl chloride polymer. CONSTITUTION:0.05-5pts.wt. nonionic surfactant having a polyoxyethylene unit such as polyoxyethylene alkyl ether, 0.5-10pts.wt. epoxy resin such as a bisphenol A type epoxy resin, and 30-400pts.wt. plasticizer such as tri-n-octyl trimellitate are blended with 100pts.wt. paste vinyl chloride polymer (pref. polymer having a residual anionic surfactant content of 0.04-5wt%) obtd. by aq. emulsion (or finely divided suspension) polymn. in the presence of an anionic surfactant such as sodium laurate and a polymn. catalyst such as hydrogen perioxide.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sol composition suitable for use in molding automobile interior materials, general household interior materials, furniture surface materials, and the like.

Traditionally, interior materials for automobiles, such as ceilings and walls. Soft vinyl chloride resin is often used for grow box lids, rear parcels, etc. Since a plasticizer is used in soft vinyl chloride resin, a phenomenon occurs in which the plasticizer volatilizes and adheres to the glass window, causing fogging. This cloudy phenomenon is exacerbated under the scorching sun. This cloudy phenomenon is called fogging. In addition, soft vinyl chloride resin and polyurethane are often used as a composite for automobile interior materials, but in this case, vinyl chloride resin has significantly poor heat resistance and light resistance, and cracks may occur during use. It is difficult to say that it exhibits sufficient performance as an interior material.

The present inventor has produced vinyl chloride resin for cypaste by various methods, and has been conducting intensive studies to mold an interior material that causes less fogging, is strong even when in contact with urethane, and has excellent heat resistance and light resistance. However, when vinyl chloride resin is polymerized, hydrogen peroxide is used as a catalyst in the presence of an anionic surfactant, and the paste is dried to produce vinyl chloride resin for paste. By adding a specific nonionic surfactant and epoxy resin to this material and molding an interior material, it was discovered that the above object could be achieved, and the present invention was completed.

That is, an object of the present invention is to provide a sol composition for molding interior materials that causes less fogging and exhibits excellent heat resistance and light resistance even when combined with urethane.

Therefore, the gist of the present invention is to provide a paste prepared by aqueous emulsion polymerization or fine suspension polymerization of vinyl chloride or a mixture of vinyl chloride and a comonomer copolymerizable therewith in the presence of an anionic surfactant and a hydrogen peroxide catalyst. The present invention relates to a sol composition for interior materials containing a vinyl chloride polymer, a nonionic surfactant having a polyoxyethylene unit, an epoxy resin, and a plasticizer.

In detail, the vinyl chloride-based polymer is prepared by adding vinyl chloride or a mixture of vinyl chloride and a comonomer copolymerizable thereto with anionic surfactants such as fatty acid soaps, alkyl sulfates, alkylaryl sulfonates,
dialkyl sulfosuccinates, alkyl sulfates preferably having an alkyl group having 1 o-is carbon atoms in the presence of a sulfated or sulfonated ester or ether, etc.
In particular, it is produced by aqueous emulsion polymerization or fine suspension polymerization using a hydrogen peroxide polymerization catalyst in the presence of sodium lauryl sulfate. It is desirable to use a reducing agent such as a sulfoxylate together with the hydrogen peroxide flux. Aqueous emulsion polymerization or fine suspension polymerization of vinyl chloride polymer latex
It is desirable to use a method in which the anionic surfactant is contained even after drying, and the anionic surfactant is contained in the vinyl chloride polymer for paste in an amount of o, oy to 6% by weight. . When the content of anionic surfactant, especially alkyl sulfate, is less than 0.0'lN lid%,
When a vinyl chloride polymer molded product is composited with polyurethane, the molded product cannot exhibit sufficient heat resistance and light resistance, and if the amount of AM increases, the heat resistance and The light resistance is good, but the surfactant tends to bleed from the molded product.

Therefore, examples of comonomers copolymerizable with vinyl chloride include vinyl esters such as vinyl acetate, vinyl propionate, and vinyl laurate; methyl acrylate;
Acrylic esters such as ethyl acrylate and butyl acrylate; methacrylic esters such as methyl methacrylate and ethyl methacrylate; maleic esters such as dibutyl maleate and diethyl maleate; - acid esters, vinyl ethers such as vinyl methyl ether, vinyl methyl ether, and vinyl octyl ether, vinyl cyanides such as acrylonitrile and methacrylate, α-olefins such as ethylene, propylene, and styrene, vinylidene chloride,
Examples include vinylidene halides or vinyl halides other than vinyl chloride such as vinyl bromide and vinyl fluoride.
These comonomers are contained in the constituent components of the vinyl chloride polymer in an amount of 30% by weight or less, preferably 20% by weight or less.

Of course, the comonomers are not limited to those mentioned above.

Nonionic surfactants containing polyoxyethylene units include, for example, polyoxyethylene alkyl ether,
Examples include polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan derivatives, etc.
0.0 per 100 parts by weight of seeds! -31 Keibu, especially 0.2
It is used in a range of 2 parts by weight. If the amount of nonionic surfactant used is less than the amount of O, OS, the vinyl chloride polymer is likely to deteriorate with respect to urethane, and the anti-fogging effect will be reduced. In addition, as the amount used increases, good results can be obtained in terms of anti-fogging effect, but the thermal stability of the vinyl chloride polymer becomes inferior, and even after taking into account the addition of heat stabilizers and processing conditions, It is desirable that it be up to 100%.

The epoxy resin used in the sol composition of the present invention is different from epoxy plasticizers such as epoxidized soybean oil, and is different from epoxy plasticizers such as epoxidized soybean oil. Epoxy novolac resins, those derived from polybutadiene, or those having seven or more epoxy groups per molecule are used. The epoxy equivalent is higher than that of ordinary epoxidized soybean oil;
Generally 100-1! ;00. Preferably lSO~700
A certain degree is used.

The amount of epoxy resin used is usually vinyl chloride polymer 1
oo parts by weight, 0. ! ;-10 parts by weight, preferably /
-3 parts by weight. The epoxy resin contributes to the prevention of 7-oging and to the heat resistance and light resistance of the vinyl chloride polymer, especially when made into a urethane composite. If the amount of epoxy resin added is less than 00 parts by weight, it is difficult to obtain sufficiently satisfactory effects of fogging prevention, heat resistance, and light resistance. On the other hand, if it is more than 70 parts by weight, the viscosity of the sol composition becomes high. Processability deteriorates, and when molded products are formed, the epoxy resin tends to bleed, resulting in problems such as stickiness in the molded products.

The plasticizer used in the sol composition of the present invention is not particularly limited as long as it is used in ordinary vinyl chloride resins, but examples include di-n-butyl phthalate and di-n-phthalate.
-octyl, dicoethylhexyl phthalate, diisooctyl phthalate, octyldecyl phthalate, diisodecyl phthalate, butylbenzyl phthalate, dicoethylhexyl in7thalate, or 1i-i3 carbon atoms
phthalic acid plasticizers such as 7-thalic acid esters of higher alcohols, n-octyl-n-decyl trimellitate,
Trimellitic acid plasticizers such as tri-coethylhexyl trimellitate, triisodecyl trimellitate, tri-n-octyl trimellitate, dico-ethylhexyl adipate, di-n-decyl adipate, diisodecyl adipate, dico azelaic acid Fatty acid ester plasticizers such as ethylhexyl, diptyl sebacate, dicoethylhexyl sebacate, tributyl phosphate,
Phosphate ester plasticizers such as tricoethylhexyl phosphate, coethylhexyldiphenyl phosphate, 1J cresyl phosphate, epoxy plasticizers such as epoxidized soybean oil, epoxidized tall oil fatty acid-2-ethylhexyl, etc. These can be used alone or in combination.

In the sol composition of the present invention, a trimellitic acid plasticizer with low volatility or an ester plasticizer of higher alcohol and phthalic acid is preferred.

Therefore, the amount of plasticizer to be used is appropriately selected depending on the desired solid content concentration of the paste sol, fluidity, purpose of the molded product, etc., but generally it is 30-4!00 parts by weight per 100 parts by weight of the vinyl chloride polymer. Parts by weight, preferably 3; Q-200
Parts by weight range.

In addition, a part of the plasticizer can be used as a diluent such as texanol isoptylate, dodecylbenzene, or toluene.
It can be replaced with an organic solvent that swells the vinyl chloride polymer, such as xylene, and may be used in the form of an organosol.

The amount of the diluent and organic solvent to be added is appropriately determined depending on the application.

It is preferable to add a tin fatty acid salt to the sol composition of the present invention, whereby the anti-fogging properties can be further improved. For example, various substances such as silver caprate, silver laurate, silver myristate, silver palmitate, silver stearate, and maleic acid can be used. It is desirable to select an organic silver acid that does not contain reactive fatty acids. The amount of tin fatty acid salt used is 1% of the vinyl chloride polymer.
00 parts by weight, a range of 7 to 3 parts by weight is used.

Furthermore, the sol composition of the present invention may contain additives commonly used for vinyl chloride resins. Examples of additives include stabilizers, antioxidants, ultraviolet absorbers, fillers, colorants, etc., and these additives are often used in combination.

The sol composition of the present invention is produced by adding the above-mentioned essential components or other additives as necessary and uniformly mixing them with a mixer such as a high-speed mixer or a knee-q. The sol composition is then made into a molded article, for example, in the following manner. A predetermined amount of the sol composition is poured into a mold for molding the desired interior material, heated for about 3-20 minutes at a gelling temperature, e.g. Take it out.

The sol composition for interior materials of the present invention has extremely good gelling properties, probably because it uses a hydrogen peroxide catalyst for the vinyl chloride polymer, and has good processability due to the reduction in viscosity due to the addition of a nonionic interfacial agent. The molded products obtained from this product are strong, and even when used as parts for automobiles, they are not affected by volatile incyanate, a plasticizer, or freon, which is used as a foaming agent for urethane, and have excellent heat resistance and light resistance. It exhibits excellent performance and can be used for a long period of time.

Therefore, the sol composition of the present invention can be used for vehicle ceiling materials, wall materials, grow box lids, rear parcels, armrests, headrests, etc., household wall materials, ceiling materials, floor materials, etc., furniture, etc. It can be used extremely effectively as a surface material.

The present invention will be described in detail below with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.

In addition, "parts" in the examples indicate "parts by weight."

Example 1 Vinyl chloride polymer for paste (degree of polymerization tsoo) too
trichoethylhexyl trimellitate? Part o Silver stearate 3 yen 1 Epoxy resin (Bisphenol A type) Part J Pigment Small amount Polyoxyethylene octylphenyl ether Predetermined amount Paste sol compositions having the above composition were used for automobiles by changing the amount of polyoxyethylene octylphenyl ether. The mixture was poured into a meter hood mold, heated and rotationally molded at 110° C. for about 10 minutes, and then cooled and the molded product was taken out to obtain a molded interior material for an automobile meter hood. This vinyl chloride resin molded product was foamed with urethane resin (freon foaming of polyol and polyisocyanate) to obtain a composite. The fogging properties of the molded product and the heat resistance of the composite were tested.

The fogging property and heat resistance tests were conducted as follows.

Fogging property〉 Put the interior material so x too x / m into a wide mouth bottle,
The opening of the wide-mouth bottle was covered with a transparent glass plate. 30 of this
The glass plate was kept in an oil bath at ℃ for 2θ hours, and the degree of fogging of the transparent glass plate was measured using an integrating sphere photometer. (Japanese Automobile Regulations,
case).

Heat Resistance> The test piece after the urethane composite was placed in a gear open at 110°C, and the time until it turned brown was measured.

Table 1 Example co-vinyl chloride polymer (same as Example 1) 100
Part diisodecyl phthalate 70 parts Tin stearate 3 parts Epoxy resin
dube pigment
Small amount of polyoxyethylene octylphenyl ether θ, S part A predetermined amount of the above sol composition was poured into an automobile armrest mold, and rotational molding was performed at 190° C. for about 5 minutes. This was subjected to fogging property and heat resistance tests (however, OC) in the same manner as in Example 1, and the results are shown below.

Fogging value 2. Zachi Heat resistance test No abnormality after qoo hours.

Example 3 In Example I, a urethane heat resistance test was conducted by setting the nonionic surfactant at 0.3 parts and varying the amount of epoxy resin added.

The results are shown in Table 2.

Comparative Example A test similar to Example I was conducted using a similar formulation to Example 1 (see Table 3).

Table 3

Claims (1)

[Claims] +1) A chloride for paste obtained by aqueous emulsion polymerization or fine suspension polymerization of vinyl chloride or a mixture of vinyl chloride and a comonomer copolymerizable with vinyl chloride in the presence of an anionic surfactant and a hydrogen peroxide catalyst. Vinyl polymer, polyoxyethylene sol composition. (2) The sol composition for interior materials according to claim 1, wherein the anionic surfactant is an alkyl sodium sulfate.