JPH0747671B2 - Matted polyvinyl chloride paste composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a matting composition using a polyvinyl chloride paste (hereinafter referred to as PVC paste), an interior material for construction,
The present invention relates to a matte polyvinyl chloride paste composition that can be used as a matting means in products such as leather.

[Problems to be Solved by Prior Art and Invention]

For products such as wallpaper, flooring, and other interior building materials such as leather and products made of polyvinyl chloride resin (hereinafter referred to as PVC resin), PVC of normal particle size is used as a means to deluster the surface. A method of applying a resin composition in which a coarse-grained PVC resin is mixed and used in combination with the resin to the surface of the product as a post-process to perform a surface matting treatment, or kneading an inorganic filler such as aluminum hydroxide or calcium carbonate into the PVC resin. There is known a method of producing a product using a resin composition.

However, in the case of the former, the post-processing is only done, which leads to a decrease in production efficiency and an average particle size of 20
Screen printing during surface treatment is difficult due to the use of ~ 50μm coarse-grain PVC resin, or thin coating is difficult (for example, some coarse particles are exposed from the surface of the coating film, which impairs the appearance). In addition, in the case of post-processing, it is usually difficult to partially deluster the surface of the product because it is coated with a transparent material for reasons such as registration during coating. On the other hand, in the latter case, the product obtained by kneading 150 parts by weight or more of the inorganic filler with respect to 100 parts by weight of the resin in order to obtain a sufficient matte effect has the original texture of PVC resin impaired. In addition, since the composition itself becomes opaque, it is difficult to produce a clear color during coloring.

Therefore, in view of the above-mentioned problems of the prior art, the present inventor does not rely on a matte surface treatment as a post-processing, and in a matting means by a kneading type into a resin, an excellent luster that has not been obtained by using a PVC paste. Research has been advanced to provide an erasable composition. Then, it was investigated to use white carbon, which is generally well known as a filler which can be added to rubber or the like to give a good reinforcing effect, as a matting agent for PVC paste.

However, white carbon usually has a primary particle size of mμ.
It is known that the paste is compounded with a solvent or the like for the purpose of increasing the viscosity because it is an extremely fine unit, but when it is used as a matting agent, it is increased by the carbon. Due to the viscous action, the viscosity of the paste increases significantly and the fluidity becomes poor, and as a result, it is difficult to apply such paste to coating or screen printing during product manufacturing. Became.

[Means for Solving the Problems]

As a result of further research based on the above findings by the present inventor, it was found that a PVC paste made of a specific PVC resin containing white carbon having a specific particle size is an excellent matting composition that solves the above-mentioned drawbacks. Heading out, the present invention has been completed.

That is, the present invention provides that "1 to 10 parts by weight of white carbon having a secondary particle diameter of 1 to 15 µm is mixed with 100 parts by weight of a resin in a polyvinyl chloride paste composed of highly polymerized polyvinyl chloride or crosslinked polyvinyl chloride. Matting polyvinyl chloride paste composition characterized by the above. "

The PVC paste used in the present invention is generally formed by uniformly dispersing fine PVC resin particles in a plasticizer and is also called a so-called "plastisol". In particular, a high-polymerization PVC resin or cross-linked PVC is used as a base resin. It is configured by using a resin.

The above-mentioned high degree of polymerization PVC resin preferably has an average degree of polymerization of 2000 or more, such as polyvinyl chloride or a copolymer of vinyl chloride and another monomer (ethylene, vinyl acetate, vinyl ether, maleic acid ester, etc.). Are used.

As the cross-linked PVC resin, those having a degree of cross-linking of 30% or more are preferable, and specifically, a vinyl chloride monomer, or a vinyl chloride monomer and a copolymerizable monomer copolymerizable therewith and an ethylenic double It is a vinyl chloride copolymer composed of a polyfunctional compound having two or more bonds in the molecule.

If the degree of polymerization and the degree of crosslinking in both of the above PVC resins are out of the above numerical ranges, there is a problem in that it is difficult to obtain a sufficient matting effect.

As the plasticizer in the paste, known ones used for this type of paste can be used, and it is preferable to add about 50 to 80 parts by weight to 100 parts by weight of the PVC resin. In the present invention, a stabilizer, a flame retardant, an antifungal agent, a filler, a foaming agent, a coloring agent and the like may be added to the paste as needed.

Any white carbon may be used as long as it has a secondary particle diameter within the above specified range, and specific examples thereof include silicic acid and silicate. If the particle size is less than 1 μm, the viscosity will be increased and the fluidity will be poor. On the contrary, if the particle size exceeds 15 μm, it will be impossible to form a coating film having a thickness less than the particle size or the surface will be smooth. It becomes inferior in sex. If the compounding ratio of the resin in the PVC paste to 100 parts by weight is less than 1 part by weight, a sufficient matting effect cannot be obtained. Conversely, if it exceeds 10 parts by weight, the matting effect will not be extremely improved and the material cost will be low. However, the cost is high.

The matting composition of the present invention having the above-mentioned constitution can be widely used in fields requiring matting treatment, and for example, various coating materials such as surface layer forming materials and matte pattern printing inks, printing means, etc. It is used as a delustering means for various products by applying a coating solution, and then heat-treating it to gel. This heat treatment is usually performed at 150 to 220 ° C.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

Examples 1 to 4 and Comparative Examples 1 to 3 are used in a PVC paste made of various PVC resins shown in the table below.
Matting pastes were prepared by blending the types and amounts of white carbon shown in the table, respectively. In addition, a filler, a titanium pigment, or the like may be added to this paste as needed.

After leaving the obtained matte paste for one day, the paste viscosity at 20 ° C. was measured using a BH type viscometer (No. 4 rotor, 60 rpm).

Next, the matte paste was coated on flame-retardant paper to a thickness of 0.12 mm, heated at 210 ° C for 60 seconds, and the surface glossiness was measured with a gloss meter (Murakami Color Research Laboratory: GM-24). It was measured at.

The results of the above paste viscosity and gloss are shown in the table below.

1) Kanegafuchi Chemicals: XH-27A 2) Nippon Zeon: G-43SH 3) Mitsubishi Kasei Vinyl: P-475 4) Sumitomo Chemical: PX-U 5) Nippon Zeon: G-121 6) Sekisui Chemical: DINP 7) ADEKA ARGUS: 465E 8) West Germany Degussa: OK-500 9) Nippon Oil: Mineral Spirit [Effect of the Invention] As described above, the matting composition of the present invention is specific. It has excellent fluidity and matting effect because it is composed of white carbon with a specific particle size in a PVC paste made of PVC resin.As a result, this composition can be used directly in a matte state. The product can be formed, the conventional surface matting treatment which has been performed as a post-processing can be omitted, and the inexpensive and easy matting treatment can be performed. or,
Since the product of the present invention has excellent fluidity and does not contain coarse particles such as coarse-grained PVC resin, it can be applied to coating having a small film thickness and screen printing without any trouble. Furthermore, since the product of the present invention does not add an inorganic filler or the like, there is no fear of impairing the original texture of vinyl chloride, and since the transparency of the resin composition is maintained, the product can be colored vividly.

Further, by using the product of the present invention, it is possible to express a design with a gloss difference by appropriately distributing and using an ordinary compounded ink and a matte compounded ink composed of the product of the invention in screen printing or intaglio printing. Becomes

Claims (1)

[Claims] 1. A blend of 1 to 10 parts by weight of white carbon having a secondary particle size of 1 to 15 μm with respect to 100 parts by weight of a resin in a polyvinyl chloride paste composed of highly polymerized polyvinyl chloride or crosslinked polyvinyl chloride. A matte polyvinyl chloride paste composition comprising: