KR100702580B1 - Additive for resin and method for producing thereof - Google Patents

Abstract

The present invention relates to an additive for synthetic resins and a method for manufacturing the same, and more particularly, by preparing an additive for synthetic resins consisting of calcium carbonate, higher fatty acids, aluminic acid fats, polyethylene wax, and high density polyethylene, The added synthetic resin not only has excellent processability, but also enables the mixing of low-cost additives in a large amount to high-cost synthetic resins without deteriorating physical properties. 75 to 86.5 wt% of calcium carbonate, 0.5 to 1.5 wt% of higher fatty acids, eggs It is characterized by comprising 0.5 to 1.2% by weight of lyric acid fat, 0.5 to 2.5% by weight of polyethylene wax and 12 to 22% by weight of high density polyethylene.

Synthetic Resin, Calcium Carbonate, High Fatty Acid, Allium Fat, Polyethylene Wax, High Density Polyethylene

Description

Additive for resin and manufacturing method thereof

The present invention relates to an additive for synthetic resins and a method for manufacturing the same, and more particularly, by preparing an additive for synthetic resins consisting of calcium carbonate, higher fatty acids, aluminic acid fats, polyethylene wax, and high density polyethylene, The added synthetic resin not only has excellent processability, but also allows a low cost additive to be mixed in a large amount with a high cost synthetic resin without deteriorating physical properties.

Currently, various additives are used in synthetic resins. The additives for synthetic resins are chemical substances added during processing or polymerization to facilitate the processing of synthetic resins and to improve the performance of the final product. It is used as a material.

The purpose of using the synthetic resin additives is to improve the quality of synthetic resins and processability of molded articles, improve physical performance, maintain long-term stability, and the like.

The synthetic resin additives are plasticizers, thermal stabilizers, oxidation inhibitors, ultraviolet stabilizers, flame retardants, antistatic agents, lubricants, impact modifiers, and the like. Is treated as an ingredient.

In addition, the synthetic resin additives can be divided into chemical properties improvers, physical properties improvers and processability improvers according to their functions. Recently, these additives exceed the meaning of the original auxiliary material, and have a special nutrition that can decisively determine the final performance of the synthetic resin product. It is recognized as a material, and the importance of the technology of using additives in the development of new products is increasing in the polymer industry.

On the other hand, the fillers of the plastic additives are largely added into two types of bulking agent for the purpose of cost reduction, and reinforcing agent is added to improve the mechanical, thermal, electrical properties or processability, compared to other additives It is common to formulate in large quantities.

Conventionally, a type of filler for general synthetic resins has been used, such as calcium carbonate, esbestos, clay, and the like. The calcium carbonate is most widely used because it can be used freely in a wide particle size. Is not improved at all, but when excessively added, there is a problem that the physical properties are deteriorated or the moldability is lowered, so that its use is not easy. The esvetose is a carcinogenic substance regulated in developed countries, and the clay The problem was that price competitiveness was relatively low.

In addition, the conventionally used synthetic resin additives are limited to less than about 15% by weight, and when added more, the physical properties of the product is lowered, so that the effect of lowering the unit cost of the synthetic resin was almost insignificant.

Therefore, an object of the present invention is to solve the problems of the physical properties of the synthetic resin product with the above-described conventional additives for synthetic resins and problems that can not lower the cost of the product, calcium carbonate, higher fatty acids, allium acid fat, polyethylene wax and high density By preparing an additive for synthetic resin made of polyethylene, the synthetic resin with the synthetic resin additive according to the present invention not only has excellent processability, but also a large amount of synthetic resin additives that can be produced at low cost without deteriorating physical properties in a large amount of synthetic resin The present invention provides an additive for synthetic resin and a method of manufacturing the same, which can provide a synthetic resin product having excellent price competitiveness.

Synthetic resin additives of the present invention for achieving the above object is 75 to 86.5% by weight calcium, 0.5 to 1.5% by weight higher fatty acids, 0.5 to 1.2% by weight fatty acid, 0.5 to 2.5% by weight polyethylene wax and high density polyethylene 12 It is characterized by including 22% by weight.

And the higher fatty acid is characterized in that stearic acid.

And the high density polyethylene is characterized in that the melt degree is 0.6 ~ 0.8g / min.

In addition, the manufacturing method of the additive for synthetic resin of the present invention,

Stirring calcium carbonate at high speed to a temperature of 75 to 85 ° C.,

Adding high-fat fatty acid to the calcium carbonate and stirring at high speed for 1 to 2 minutes;

Adding aluminate to the mixture and stirring it at high speed for 2 to 4 minutes;

Adding polyethylene wax to the mixture and stirring at high speed for 4 to 6 minutes;

It is characterized in that it comprises a step of high-speed stirring for 5 to 8 minutes by adding a high density polyethylene to the mixture.

And after the high-speed stirring step of the high-density polyethylene,

Cooling the stirred mixture and extruding linearly, cutting the extruded extrudate, and drying the cut cut is characterized in that it further comprises.

Hereinafter, the present invention will be described in detail.

First, the calcium carbonate (CaCO ₃ ) of the present invention is used as a general inorganic filler, easy to use and can be used freely in a wide part size, has less wear and relatively low specific gravity of the mixing processing device volume There is a low cost advantage.

When the calcium carbonate is less than 75% by weight of the additives, the effect of rigid reinforcement is insignificant as well as the effect of lowering the price of the synthetic resin product, and when it exceeds 86.5% by weight, the effect of rigid reinforcement is remarkable, but the impact resistance and Since there is a problem that the moldability is lowered, it is most preferable to set the blending ratio to 75 to 86.5% by weight.

In addition, the calcium carbonate is preferably used in the range of the average particle size of 0.5 ~ 10㎛, when the particle size is less than 0.5㎛ or more than 10㎛ poor workability due to the powder blowing phenomenon or extrusion of the additive linearly or pellet This is because problems may occur in the form.

The higher fatty acid causes the calcium carbonate group reaction to change the hydrophilicity of the surface of the calcium carbonate, which is an inorganic raw material, to be lipophilic, and serves to facilitate the mixing of the additives.

It is preferable that the higher fatty acids include 0.5 to 1.5% by weight of the additive. When the blending ratio of the higher fatty acids is less than 0.5% by weight, the effect is insignificant. This is because the PE product is easily decomposed. And the higher fatty acid is most preferably used, such as stearic acid (stearic acid), but is not limited thereto.

In addition, the aluminate fat (Aluminate Coupling Agent) is for the fusion of inorganic and organic matter well, when the blending ratio is less than 0.5% by weight, the aluminate fat does not wrap the inorganic well, the raw material absorbs moisture well, In the production of vinyl, poor fusion with PE is generated, and if it exceeds 1.2% by weight, the PE product is easily decomposed, so it is preferable to mix 0.5 to 1.2% by weight.

In addition, polyethylene wax is intended to improve melt flow properties of synthetic resins. If polyethylene wax is less than 0.5% by weight, melt flowability is poor, and workability is poor. If it exceeds 2.5% by weight, melt flow property is improved, but strength and formability are improved. Since the problem of falling arises, it is preferable to mix | blend 0.5-2.5 weight%.

In addition, high-density polyethylene is intended to improve the physical performance of synthetic resins. If the density of the high-density polyethylene is less than 12% by weight, the physical performance of the synthetic resin may be degraded when the additive is added, and if it exceeds 22% by weight, the physical performance is improved. Since a degree is insignificant and a manufacturing cost may become high, it is preferable to make the compounding ratio into 12 to 22 weight%.

In addition, the high density polyethylene is most preferably used with a melt of 0.6 ~ 0.8g / min, the melting point of the high density polyethylene is less than 0.6g / min, the melting point is higher than the normal temperature when producing vinyl products Since the problem that needs to be raised occurs, and the melting point is lowered if it exceeds 0.8g / min, the strength of the vinyl product is lowered, it is most preferable to set the melt degree to 0.6 ~ 0.8g / min.

Next, a method for preparing the additive for synthetic resin according to the present invention will be described. Since the addition amount of each composition to be added is according to the blending ratio of the additive for synthetic resin described above will be described in detail.

First, the calcium carbonate is stirred at a high speed to raise the temperature to 75 to 85 ° C. to facilitate mixing of the compositions added later. The reason for setting the temperature of the calcium carbonate to 75 to 85 ° C. is that when the initial temperature is less than 75 ° C., it is not easy to mix higher fatty acids, allium acid, polyethylene wax, high-density polyethylene, etc., which are post-processes. This is because energy is consumed and not economical.

After high-speed stirring of calcium carbonate, high-fat fatty acid was added to the calcium carbonate, and then stirred at high speed for 1 to 2 minutes. When high-fat fatty acid was mixed, allium fatty acid was added to the mixture, and then high-stirred again for 2 to 4 minutes.

When the aluminate fat is mixed, polyethylene wax and high-density polyethylene are added again in order to stir at high speed for 4 to 6 minutes and 5 to 8 minutes.

Increasing the stirring time gradually does not necessarily limit the stirring time because it is difficult to make uniform mixing as the amount and type of the mixture increases.

And when the mixture is completed by the high-speed stirring by adding the high-density polyethylene, cooling the stirred mixture and extruding it linearly, cutting the extruded extrudate, and drying the cut cut It may further include.

That is, the form of the stirred mixture is not easy to handle, so that it is extruded or pelletized linearly to facilitate the handling and storage of the additive.

The additive prepared as described above is used by mixing in a synthetic resin such as polyethylene (PE), polypropylene (PP), the compounding ratio is most preferably mixed with additives of 5 to 40% by weight 60-95% by weight of synthetic resin Preferably, when the amount of the additive to be mixed is less than 5% by weight, the role of the additive is insignificant, and when the amount exceeds 40% by weight, the physical properties of the synthetic resin may be lowered, so that the mixing ratio may be appropriately adjusted.

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

When molding the films of the following Examples and Comparative Examples, the appearance thickness, weight and the like were all performed to have the same conditions.

Example 1

76% by weight of calcium carbonate, 1% by weight of allium fat and 1% by weight of polyethylene wax 21% by weight of high density polyethylene having a melt index of 6 g / 10 min. After raising, higher fatty acids, allium acids, polyethylene waxes, and high density polyethylene were sequentially added, followed by stirring for 1 minute, 2 minutes, 5 minutes, and 5 minutes, respectively.

When the stirring was completed, pelletized it, mixed it with 33% by weight of polyethylene resin, and produced a vinyl product by an extruder to detect the performance by a standard detection method and the results are shown in Table 1 below.

Example 2

Prepared 19% by weight of high density polyethylene having 78% by weight of calcium carbonate, 0.5% by weight of aluminate, 1.5% by weight of polyethylene wax, and a melt index of 6.5g / 10min. After raising the higher fatty acid, aluminic acid fatty acid, polyethylene wax, high-density polyethylene was added sequentially and stirred for 2 minutes, 3 minutes, 4 minutes, and 5 minutes, respectively.

When the stirring was completed, pelletized it, mixed it with 33% by weight of polyethylene resin, and produced a vinyl product by an extruder to detect the performance by a standard detection method and the results are shown in Table 1 below.

Example 3

Prepare 80 wt% of calcium carbonate, 0.7 wt% of allium fat at 0.8% by weight, and 1.5 wt% of polyethylene wax, and 17 wt% of high density polyethylene having a melt index of 7 g / 10 min. After raising, higher fatty acids, allium acids, polyethylene waxes, and high density polyethylene were sequentially added, followed by stirring for 1 minute, 3 minutes, 5 minutes, and 7 minutes, respectively.

When the stirring was completed, pelletized it, mixed it with 33% by weight of polyethylene resin, and produced a vinyl product by an extruder to detect the performance by a standard detection method and the results are shown in Table 1 below.

Example 4

Prepare 82% by weight calcium carbonate, 0.1% by weight of aluminate, 0.5% by weight of polyethylene oxide, 2.5% by weight of polyethylene wax, and 14% by weight of high density polyethylene with a melt index of 8g / 10min. After raising, higher fatty acids, allium acids, polyethylene wax, and high density polyethylene were sequentially added, followed by stirring for 1 minute, 2 minutes, 5 minutes, and 6 minutes, respectively.

When the stirring was completed, pelletized it, mixed it with 33% by weight of polyethylene resin, and produced a vinyl product by an extruder to detect the performance by a standard detection method and the results are shown in Table 1 below.

Example 5

84% by weight of calcium carbonate, 0.8% by weight of allium fat at 1.2% by weight, and 2% by weight of polyethylene wax, 12% by weight of high density polyethylene having a melt index of 7.5 g / 10 min. After raising the higher fatty acid, allium acid fatty acid, polyethylene wax, high-density polyethylene was added sequentially and stirred for 3 minutes, 2 minutes, 5 minutes, and 8 minutes, respectively.

When the stirring is completed, pelletized it, mixed with 30% by weight of polyethylene resin and producing a vinyl product by an extruder to detect the performance by a standard detection method is shown in Table 1 below the results.

(Comparative Example)

As a comparative example, a conventional polyethylene additive (type 1250 of Beijing Jeongdae Vinyl Co., Ltd.) was purchased and added to the polyethylene resin by 14% by weight.

Performance test results according to the above embodiments. division Comparative example Example 1 Example 2 Example 3 Example 4 Example 5 Additive amount (% by weight) 14 33 33 33 33 30 Tensile Strength (Mpa) 22.33 24.5 23.5 25.4 23 22.7 Wansooral (Mpa) 32.0 32.3 32.2 31.38 33.0 30.8 Toy volume (Mpa) 888.4 942 948 1140 927 902 Impact strength (J / m) 880.7 927.5 977 887 896 889 Fluid flow rate (g / 10min) 0.90 1.02 0.96 0.97 1.0 0.98 Product pressure test (N) 610 690 670 620 630 680

As can be clearly seen in Table 1, each of the examples to which the additive of the present invention is added can be confirmed that the amount of the additive can be added in large quantities (33 wt% or more) without degrading the strength or physical properties of the product. It was.

In other words, by using the additive of the present invention it is possible to lower the production cost of the product to be able to produce a high value-added competitive synthetic resin products.

Although the present invention has been described above with reference to the above embodiments, it is not necessarily limited thereto, and various modifications may be made without departing from the scope and spirit of the present invention.

As can be clearly seen from the above description, according to the additive for synthetic resin of the present invention and a method for producing the same, by preparing an additive for synthetic resin consisting of calcium carbonate, higher fatty acid, allium acid fat, polyethylene wax and high density polyethylene, Due to the action of the additives in the synthetic resin is uniformly made, and the use of high-density polyethylene, such as to improve the physical performance of the synthetic resin product more, and to enable the mixing of low-cost additives in a large amount of expensive synthetic resin It is possible to reduce the cost of the synthetic resin product, thereby providing a useful effect, such as being able to produce a synthetic resin product having a price competitiveness.

Claims (5)

In the additive for synthetic resin, Calcium carbonate 75-86.5% by weight, higher fatty acid 0.5-1.5% by weight, aluminic acid 0.5-1.2% by weight, polyethylene wax 0.5-2.5% by weight and high density polyethylene 12-22% by weight additive. The method of claim 1, The higher fatty acid is a synthetic resin additive, characterized in that stearic acid. The method of claim 1, The high density polyethylene is an additive for synthetic resin, characterized in that the melt degree is 0.6 ~ 0.8g / min. Stirring calcium carbonate at high speed to a temperature of 75 to 85 ° C., Adding high-fat fatty acid to the calcium carbonate and stirring at high speed for 1 to 2 minutes; Adding aluminate to the mixture and stirring it at high speed for 2 to 4 minutes; Adding polyethylene wax to the mixture and stirring at high speed for 4 to 6 minutes; Including high-density polyethylene in the mixture to a high-speed stirring for 5 to 8 minutes, Each of the above-mentioned composition is composed of 75 to 86.5 wt% calcium carbonate, 0.5 to 1.5 wt% higher fatty acid, 0.5 to 1.2 wt% aluminate, 0.5 to 2.5 wt% polyethylene wax, and 12 to 22 wt% high density polyethylene. The manufacturing method of the additive for synthetic resins. The method of claim 4, wherein After the step of high speed stirring by adding the high density polyethylene, Cooling the stirred mixture and extruding linearly, cutting the extruded extrudate, and drying the cut cut further comprising the step of producing an additive for a synthetic resin.