JP2001279029A - Colorant for forming special pattern and resin composition therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colarant for forming special patterns, such as a wood grain-like or a marble-like pattern, capable of removing such a defect that resin molded products which are conventionally molded from thermosetting resins or polyvinyl chloride resin may cause environmental pollutions, by making it possible to use an olefinic resin as a diluent resin with the aim of removing the above defect, while the molded products from the above conventional resins are recently examined actively to be commercialized and used for furniture, daily necessaries, interior automotive trims, etc., after applying the special patterns to their surfaces. SOLUTION: This colarant for forming the special pattern contains three components comprising (A) 10-100 pts.wt. of a thermoplastic elastomer, (B) 0.1-70 pts.wt. of a pigment, and (C) 1-70 pts.wt. of low-density polyethylene and/or an olefinic wax as main components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a colorant for forming a special pattern such as a grain pattern or a marble pattern on the surface of a resin molded product by mixing and molding with an olefin-based resin, and the colorant can be used. And a resin composition to be obtained.

[0002]

2. Description of the Related Art In recent years, resin molded products used for furniture, daily necessities, vehicle interiors, and the like, which have been subjected to special patterns such as woodgrain or marble, have been actively commercialized. In order to form these special patterns, surface coating using a print coating or a hot stamp on the surface of a molded product has been used before.

All of these manufacturing methods involve a surface treatment as a secondary processing, which not only complicates the operation, but also exposes the internal ground pattern of the molded article due to a trauma due to the pattern formation by the surface treatment. There is a risk of wear and fading. In recent years, a resin composition having a fiber spot pattern in which a fibrous substance is dispersed in a resin, for example, a cellulose colored fiber, has been proposed in JP-A-51-123248. There is a drawback that since the fibers emerge in the form of lint on the surface of the object, they do not easily become fine fiber spots and a decorative feeling is hardly obtained.

Japanese Patent Application Laid-Open No. 03-2008 uses a crosslinked olefin polymer and a pattern coloring material for an olefin resin.
No. 41, which is not preferable because the crosslinking reactivity is high and the fluidity operation during the molding process becomes difficult, and it becomes difficult to produce a molded product which is satisfactory in blow molding or sheet molding.
Also, the production of special pattern molded products using a general-purpose resin such as vinyl chloride resin or polyolefin resin is being studied.

[0005] For example, it is possible to produce a molded article having a streak (grain) pattern by utilizing the property that vinyl chloride resins having different molecular weights are not completely mixed when melt-kneaded. However, molded articles using a vinyl chloride resin have a major drawback of causing environmental pollution when disposed after use, particularly in incineration. Polyolefin resin is
Disposal is easier than vinyl chloride resin, but when kneading polyolefin resins with different degrees of polymerization,
Mixing and dispersing proceeds easily, and a wood grain pattern molded product as in the case of vinyl chloride resin cannot be obtained.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present inventors
At the time of disposal after use of molded articles, using a polyolefin resin that does not cause environmental pollution, a special pattern forming colorant that can easily obtain a special pattern such as a grain pattern, a marble pattern, and the colorant. Thus, a special pattern forming resin composition obtained by using the resin composition was developed.

[0007]

That is, according to the first aspect of the present invention, (A) a thermoplastic polyester elastomer is used.
This is a colorant for forming a special pattern, which comprises three components of 0 parts by weight, (B) 0.1 to 70 parts by weight of a pigment, and (C) 1 to 70 parts by weight of a low density polyethylene and / or olefin wax as main components.

[0008] The thermoplastic polyester elastomer (A) used in the present invention is a PB having the properties of a thermoplastic resin.
A thermoplastic polyester elastomer which shares a soft segment having rubbery properties with a T-based hard segment, in which the hard segment is made of an aromatic or aliphatic polyester and the soft segment is made of an aliphatic polyether or an aliphatic polyester, is particularly preferred. . For example,
Toyobo Co., Ltd., a product made by Toyobo Co., Ltd., whose hard component (segment) is polyester and the soft part is polyether, manufactured by Toyobo Co., Ltd., and the hard part is polyester and the soft part is polyester. Co., Ltd. product Pelprene S type.

As the pigment (B) used in the present invention, any of conventionally used organic pigments, inorganic pigments and extender pigments can be used. For example, organic pigments such as azo-based, anthraquinone-based, perylene-based, phthalocyanine-based, and isoindolinone-based pigments, carbon black, titanium oxide, inorganic pigments such as red iron oxide, tanker, and extender pigments such as talc are given. They may be used alone or as a mixture of two or more. Examples of the component (C) used in the present invention include low-density polyethylene and polyolefin waxes such as polyethylene wax, polypropylene wax, and ethylene-vinyl acetate copolymer wax.

In the mixing ratio of the three components (A), (B) and (C), as the component (A) increases, the special pattern effect obtained by the present invention is more exerted, and as the component (B) increases, the pigment increases. A high density color master batch is obtained. The invention according to claim 2 is characterized in that (B) 0.1 to 70 parts by weight of the pigment and (C) low density polyethylene and / or olefin wax 1 to 7 parts.
After the mixture obtained by kneading 0 parts by weight was obtained, (A) thermoplastic polyester elastomer-10 to 10 was added to the mixture.
This is a method for producing a colorant for forming a special pattern, comprising 0 parts by weight.

In the production of the colorant of the present invention, there is a large difference in melting point between the component (A) and the component (C), and when the three components are kneaded simultaneously, it is difficult to disperse the pigment of the component (B). There is. Therefore, it is preferable to mix (A) after kneading (B) and (C) in advance as a method for producing a colorant for forming a special pattern.

A third aspect of the present invention is a special pattern forming resin composition comprising (D) 100 parts by weight of a polyolefin resin and 0.1 to 10 parts by weight of the special pattern forming colorant of the first aspect. . At this time, if the blending amount of the special pattern forming colorant is less than 0.1 part by weight, it is not preferable because a special pattern (grain pattern) cannot be formed, and if it is more than 10 parts by weight, the special pattern can be formed. However, it is not preferable because the mechanical properties of the molded article are reduced. The proportion of the component (A) is preferably within the range specified according to the purpose of use, regardless of the pigment concentration.

According to a fourth aspect of the present invention, the thermoplastic elastomer (B) used in the first aspect has a melting point (JIS-K7121).
160-220 ℃, MFR (ASTM D1238 measurement) 5-3
It is a colorant for forming a special pattern of 0 g / 10 min. (B)
The components have a melting point of 160-220 ° C. and an MFR of 5-30.
It is preferable to satisfy the above condition because a beautiful grain pattern appears. When the melting point is lower than 160 ° C., it is not preferable because the fine pattern is finely dispersed in the polyolefin resin at the processing temperature and a special pattern is not formed. If the temperature is higher than 220 ° C., it does not flow at the processing temperature and a special pattern is not formed, which is not preferable.

On the other hand, if the MFR is less than 5, the colorant for forming a special pattern does not float on the surface of the molded product, which is not preferable. More preferable conditions in this case are a melting point of 180 to 220 ° C. and an MFR of 10 to 25 g / 10 minutes.

According to a fifth aspect of the present invention, the thermoplastic polyester elastomer (B) used in the second aspect has a melting point (JI
It is a resin composition for forming a special pattern having a temperature of 160 to 220 ° C. and an MFR (measured by ASTM D1238) of 5 to 30 g / 10 min. More preferably, the melting point is 180 to 220 ° C. and the MFR is 10 to 25 g / 10 min. In addition, in order to enhance the effect of the special pattern forming colorant, if necessary, it is also possible to use a resin that has been colored in advance. It is also possible to simultaneously add a coloring masterbatch having a different hue to the special pattern forming colorant and the special pattern forming colorant during molding.

At the processing temperature, the carrier resin used in the coloring masterbatch must be compatible with the special pattern forming colorant but compatible with the base polyolefin resin. Usually, the same resin as the base is preferable, but it is not necessarily limited to this.

When a special pattern molded product such as a marble pattern or a woodgrain is produced by using the product of the present invention, a method which is usually adopted, that is, a polyolefin which is a special forming colorant and a diluting resin of the present invention is used. After the system resin is mixed with a mixer such as a Henschel mixer, a tumbler, a V blender or the like, household articles such as housing members and containers are molded using various molding machines.

For example, containers and daily necessities having a marble pattern and a marble pattern are produced using an injection molding machine, and building materials having a grain pattern are produced using a profile extruder. The colorant or the resin composition of the present invention may optionally contain various additives, for example, a fluid lubricant, a surfactant, an antistatic agent, an antioxidant, and the like, to the extent that the characteristics are not impaired. May be.

Examples and comparative examples will be described below. The parts by weight are expressed as parts. Example 1 30 parts of (B) titanium oxide pigment and 20 parts of (C) low-density polyethylene were mixed with a Henschel mixer for 5 minutes, and the mixture was set at a set temperature of 160 ° C. and a throughput of 30 kg using a twin-screw extruder.
/ Knead and granulated under the condition of 1 hour. The granulated product, melting point 212
℃, heat distortion temperature 117 ℃, Vicato softening point 190 ℃ and MFR20
After mixing 50 parts of a thermoplastic polyester elastomer (P-150B manufactured by Toyobo Co., Ltd.) using a tumbler mixer, the mixture was mixed at a preset temperature of 23 using a single screw extruder.
The mixture is kneaded and granulated under the conditions of 0 ° C. and an extrusion rate of 5 kg / hour to obtain the colorant for forming a white special pattern of the present invention. And, replacing the pigment used by the above-mentioned white colorant production method with a red petal,
The colorant for forming a brown special pattern of the present invention is obtained.

1 part of the above white colorant and 1 part of a brown colorant,
100 parts of polypropylene (melting point 230 ℃, MFR5, specific gravity 0.91)
And a coloring pigment (using low-density polyethylene for ivory and base resin) in a tumbler mixer to obtain the resin composition for forming a special pattern of the present invention. The resin composition of the present invention was molded using an injection molding machine having a screw diameter of 28 mm and a mold clamping pressure of 55 at 205 ° C. to produce a plate having a marble pattern. The obtained plate had a beautiful marble pattern which could not be seen in the marble tone applied to conventional products.

Example 2 In Example 1, a thermoplastic polyester elastomer used in the production of a colorant for forming a white and brown special pattern was manufactured by the company (Toyobo Co., Ltd. product: S-6001).
A special pattern-forming colorant and a special pattern-forming resin composition are obtained in the same manner as in Example 1 except that the above-described method is used.
The above resin composition was molded using the injection molding machine used in Example 1 at a molding temperature of 212 ° C. to produce a plate having a marble pattern. The obtained plate had a beautiful marble pattern which could not be seen in the marble tone applied to conventional products.

Example 3 In Example 1, as a thermoplastic polyester elastomer used in the production of a colorant for forming a special pattern, a white colorant, product P-280B manufactured by Toyobo Co., Ltd., brown coloration was used. A colorant for forming a special pattern and a resin composition for forming a special pattern are obtained in the same manner as in Example 1 except that the agent is changed to Toyobo Co., Ltd. product S-6001. The above resin composition was molded at an injection temperature of 212 using the injection molding machine used in Example 1.
Molding was carried out at a temperature of ℃ to produce a marble-like plate. The obtained plate had a beautiful marble pattern which could not be seen in the marble tone applied to conventional products.

Example 4 100 parts of polypropylene (homopolymer: melting point 230 ° C., MFR5, specific gravity 0.91) blended with 2 parts of the colorant for forming a special brown color used in Example 1 and 5% of talc were tumbled. -Mixing with a mixer to obtain the special pattern forming resin composition of the present invention. The resin composition of the present invention is
It is molded using an extruder having a diameter of 65 mm, L / D25 and CR2.5 at 190 ° C. to obtain a wood-shaped, plate-shaped irregularly shaped extruded product having a width of 60 mm and a thickness of 6 mm. On the surface of the molded product, a vivid woodgrain pattern not obtainable in the conventional product was formed.

Example 5 The same procedure as in Example 4 was carried out except that the thermoplastic polyester elastomer used as the colorant for forming a special brown pattern was replaced with a product of the same company (Toyobo Co., Ltd. product: S-6001). The special pattern forming resin composition of the present invention is obtained by the method.
Then, on the surface of the molded product obtained by the same method as in Example 4, a vivid woodgrain pattern which cannot be obtained by the conventional product was formed.

Comparative Example 1 In Example 1, the thermoplastic polyester elastomer used as the colorant for forming a white special pattern and the colorant for forming a brown special pattern was polypropylene (homopolymer: melting point of 230).
Injection molding was carried out in the same manner as in Example 1 except that the temperature and the MFR were changed to 0.91 and 0.91), respectively. In the obtained molded product, the coloring pigment and the colorant for forming a special pattern were completely mixed, and a marble pattern was not formed.

Comparative Example 2 In Example 1, the thermoplastic polyester elastomer used as the colorant for forming a white special pattern and the colorant for forming a brown special pattern was ethylene propylene rubber (a product of Mitsui Chemicals, Inc., Mitsui EPT13092P). Example 1 except that
When the injection molding was carried out in the same manner as in the above, the coloring pigment and the special pattern forming colorant were completely mixed, and no marble-like pattern was formed.

COMPARATIVE EXAMPLE 3 Extrusion molding was performed in the same manner as in Example 4 except that polyetheramide (melting point: 160 ° C.) was used as the base resin of the special pattern forming colorant. The mixture was mixed with the polypropylene composition, and the grain pattern was not formed.

As is clear from the above Examples and Comparative Examples, when the base resin used is the special pattern-forming colorant of the present invention comprising a thermoplastic polyester elastomer having a specific melting point and MFR, the polyolefin resin is used. A marble-like pattern and a grain pattern could be formed. On the other hand, a special pattern colorant using polypropylene, ethylene-propylene rubber, or polyetheramide as the base resin could not form a special pattern such as a marble pattern or a grain pattern on a polyolefin resin molded product. .

[0029]

The colorant for forming a special pattern according to the present invention comprises:
(A) The thermoplastic polyester elastomer is easily mixed, and the production of a product having a high pigment concentration is easy. Therefore, even when a special pattern molded product is manufactured, a large amount of a molded product can be manufactured using a small amount of a coloring agent. A molded product obtained by using the present invention provides a product with less environmental pollution, unlike a product using a vinyl chloride resin or a thermosetting resin.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 67/00 C08L 67/00

Claims (5)

[Claims] 1. A thermoplastic polyester elastomer (A)
10 to 100 parts by weight, (B) 0.1 to 70 parts by weight of pigment, (C) low density polyethylene and / or olefin wax 1 to 7
A colorant for forming a special pattern, comprising 0 parts by weight of three components as main components. 2. Preliminarily, 0.1 to 70 parts by weight of (B) a pigment and (C) 1 to 7 of a low-density polyethylene and / or olefin wax.
A method for producing a colorant for forming a special pattern, comprising kneading 0 parts by weight and then mixing the mixture with the thermoplastic polyester elastomer (A) in an amount of 10 to 100 parts by weight. 3. A special pattern forming resin composition comprising (D) 100 parts by weight of a polyolefin resin and 0.1 to 10 parts by weight of the special pattern forming colorant according to claim 1. 4. A coloring agent for forming a special pattern, wherein the thermoplastic polyester elastomer used in claim 1 has a melting point of 160 to 220 ° C. and an MFR of 5 to 30. 5. A resin composition for forming a special pattern, wherein the thermoplastic polyester elastomer used in claim 2 has a melting point of 160 to 220 ° C. and an MFR of 5 to 30.