JPS6094444A - Jellylike pvc composition - Google Patents

Abstract

PURPOSE:A composition, obtained by incorporating polyvinyl chloride (PVC) with a plasticizer and an oil compatible therewith, having jellylike elasticity, and producible at a low cost withut bleeding the platicizer. CONSTITUTION:A jellylike polyvinyl chloride (PVC) composition obtained by incorporating 100pts.wt. PVC with 150-2,000pts.wt. total of plasticizer and an oil compatible therewith, and 10-90pts.wt., based on 100pts.wt. total of the plasticizer and the oil, oil. The resultant composition is obtained by dissolving PVC in a mixture of the plasticizer with the oil under heating, and cooling and solidifying the resultant mixture.

Description

[Detailed description of the invention] The present invention relates to improvements in jelly-like PVC m acids.

PVC (polyvinyl chloride) is one of the typical synthetic resins, and is made by kneading PVC with plasticizers, stabilizers, and other necessary ingredients. A wide variety of products such as various molded products, films, sheets, and foams are manufactured from plastic molded into plastic. The performance of this PvC can be changed arbitrarily by drastically changing the composition of the compound. However, not all possibilities of PVC have been revealed. For example, whether jelly formation, which has already been widely applied for natural polymers such as agar, gelatin, and pectin, is also possible for PvC.
If 1 is possible, it is completely unknown what kind of physical properties PvC jelly would have. If PVC forms a jelly, the resulting PvC jelly is expected to exhibit physical properties that are completely different from conventional PvC products, and it is expected that new uses will open up for PVC.

In view of these circumstances, the present inventors conducted extensive research on the formation of PvC jelly, and succeeded in obtaining a PVC composite sole exhibiting uniform jelly elasticity. Various proposals were made.

In both of these methods, a large amount of plasticizer is added to PVC to form a uniform jelly using only the plasticizer. For this reason, there is a problem that the cost is high and it is easy to bleed.

The present invention has been made to solve this problem, and its purpose is to replace a part of the plasticizer with an oil that is compatible with the plasticizer, thereby making it possible to improve the efficiency of the plasticizer by replacing it with an oil that is compatible with the plasticizer. The object is to obtain a jelly-like PvC composition that can lower the modulus, soften the hardness, lower the cost, and prevent bleeding.

That is, in the present invention, the total amount of plasticizer and oil compatible with this plasticizer is 1 for 100 M parts of polyvinyl chloride.
It is characterized in that it contains 50 to 2000 parts by weight, and 10 to 50 parts by weight of oil based on 100 parts by weight of the total amount of plasticizer and oil.

In this invention, the plasticizer added to PvC is Pv
The modulus of the C composition is lowered, the hardness is softened, and the jelly becomes uniform. This plasticizer blunt has traditionally been used as PVC.
Plasticizers used in molding can be used,
For example, dioctyl phthalate (DOP), diindecyl phthalate (DBP), diindecyl phthalate (DI
Examples include heptatarate plasticizers such as DP), phosphate plasticizers such as trioctyl phosphate (TOP), and methacrylate plasticizers. Furthermore, if a flame retardant plasticizer such as tricresyl phosphate (TCP) is added to the product, the product can be rendered flammable.

Oil is added to replace part of the plasticizer, and this addition can further lower the simulant and soften the hardness. This oil is compatible with the above-mentioned plasticizer, and includes, for example, machine oil, rubber softening oil, food oil, and the like.

In the present invention, the total amount of plasticizer and oil is
150 to 2000 parts by weight. The reason for this is
This is because if it is less than 150 parts by weight, the PVC composition will not become jelly-like, and if it exceeds 2,000 parts by weight, the cost will be high and bleeding will occur easily. Also, for the total z1oo weight parts of the oil, 10 to 10~? It will be called OMJr club. The reason for this is that if the amount is less than 10 parts by weight, the effect of adding the oil cannot be sufficiently exhibited, and if the amount exceeds 9Qi, it becomes difficult to form into a jelly.

Further, in the present invention, various additives such as a stabilizer such as zinc stearate, a coloring agent, or a filler may be mixed as necessary. If there is an odor from the oil, you may add fragrance or the like.

In addition, plasticizers are also added in the production of conventional PVC RG products, but in this case the plasticizers are simply used to provide the fluidity necessary during the molding process, and to give the products impact resistance and flexibility. This is what I came here for. The amount used is 30 parts by weight or less in the case of hard products, and about 40 to 100 parts by weight in the case of soft products, taking into account deterioration of physical properties and bleeding.

PVC to which a plasticizer and oil have been added can be used in the method for producing a jelly-like PVC composition previously proposed by the present inventors (
) to (c) can be applied to manufacture. That is, (a) a ppvc composition can be obtained by dissolving PvC in a solvent, adding a predetermined amount of a plasticizer and oil thereto at room temperature, and then removing the solvent. In this case, the order of blending the plasticizer and oil is arbitrary.

(b) The jelly-like PvC composition according to the present invention can also be obtained by heating and dissolving PVC in a mixture with a plasticizer and then cooling and solidifying the mixture.

(c) It can also be obtained by dispersing PVC grada in a mixture of a plasticizer and oil to make a suspension, molding it under heat to melt the PVC, and then cooling and solidifying it.

The PVC composition thus produced has a jelly-like elasticity and feel similar to agar jelly. This suggests that during the manufacturing process of the PVC composition, PVC molecules incorporate plasticizers and oils and become dull, thereby forming PVC jelly. However, this ZeIJ-like PvC composition does not cause syneresis like agar jelly, and is extremely stable. In addition, it has the elongation properties and tensile strength of Kanashi, and does not easily tear apart like agar dal. It also has the characteristics of being highly deformable and having excellent shape following properties. Moreover, there is no decrease in physical properties or increase in hardness at low temperatures,
Even when used for a long time at ~-40°C, it shows the same behavior as at room temperature.

In particular, since part of the plasticizer is replaced with oil, a PVC composition with the same modulus can be obtained at a lower cost than when a plasticizer is added alone.

As a result, there is less bleeding and less stickiness. Furthermore, since the oil is added together with the plasticizer, the total amount can be increased compared to when the plasticizer is used alone, and therefore the hardness of the PVC composition can be varied over a wide range.

As described above, the jelly-like PVC composition obtained by the present invention is a completely new composition that has properties not found in conventional soft PVC, and by taking advantage of these properties, it can be used for various purposes such as the following. It is possible to use.

First, it can be used as a cushion material by taking advantage of its elasticity. Urethane foam is currently widely used as a cushion material, but it has been pointed out that the elasticity of urethane foam has a large hysteresis loss, causing a feeling of bottoming out. On the other hand, the elasticity of the t-, h jelly uniform PVC m parabolic obtained by the present invention is characterized by an extremely small hysteresis loss.
Therefore, if this is used as a substitute for a water bed used for sick people, for example, it will be extremely effective in preventing bedsores since it has excellent shape-following properties.

In addition, it can be used as a sealing material for each bowl or as a toy by taking advantage of its excellent shape-following and deformation characteristics. Furthermore, since it has excellent moldability similar to agar, it can also be applied to molds that require a high degree of precision like agar jelly.

The present invention will be explained in detail below.

A jelly-like PVC composition according to the present invention was obtained under the manufacturing conditions shown in the Zx display.

Table 1: However, is DOP used as the plasticizer and machine oil as the oil? In addition to the above ingredients, 5 parts by weight of a stabilizer was added. In addition, the number a-
c corresponds to the number given in the explanation of the manufacturing method.

The physical properties of the PVC composition thus obtained were investigated, and the results are shown in Table 2.

Table 2 However, the hardness was determined by a penetration test.

As explained above, according to the present invention, a part of the plasticizer is replaced with oil, so it can be obtained at a lower cost with the same modulus, and also has less bleeding, less stickiness, and can be further blended. Since the range is widened, the hardness can be changed over a wide range, which has a remarkable effect.

Claims (1)

[Claims] A total of 150 to 2,000 parts of a plasticizer and an oil compatible with the plasticizer are contained per 100 parts by weight of polyvinyl chloride, and 10 to 2000 parts of oil are contained per 100 parts by weight of the total amount of plasticizer and oil. Jelly-like PVC composition 0 characterized by containing 90 parts by weight