KR20030049512A - complex nuclear agent having a improve flowability and transparency and method for manufacturing thereof - Google Patents

Abstract

PURPOSE: A complex nucleating agent for polyolefin polymers having excellent lubricating property and flowability to be easily poured and excellent transparency is provided. CONSTITUTION: The complex nucleating agent having excellent flowability and transparency is obtained by coating a sorbitol-based nucleating agent alone or together with an inorganic nucleating agent mixed in a predetermined ratio by using a lubricative organic compound. The inorganic nucleating agent is selected from the group consisting of talc, metal oxides or hydroxides, alkaline earth metal carbonates or sulfates, hydrotalcites and zeolites. The lubricative organic compound is an acid having the formula RCOOH wherein R is C5-C22 alkyl, a metal soap or a polyhydric alcohol and an ester compound thereof.

Description

Complex nuclear agent having a improve flowability and transparency and method for manufacturing

The present invention relates to a composite nucleating agent and a method of manufacturing the same, and more particularly, to a nucleating agent excellent in flowability and transparency and a method for producing the same.

Generally, various kinds of additives are required for good physical properties of polyolefin-based polymers. Examples of such additives include antioxidants, ultraviolet absorbers, antistatic agents, lubricants, slip agents, nucleating agents, and the like. Among them, the transparent nucleating agent is an additive that is used to improve transparency and improve physical properties in polypropylene of polyolefin, and forms crystals in a small and homogeneous form, and is frequently added to products used for films and coatings. However, most transparent nucleating agents have many problems in transporting and feeding due to poor adhesiveness or poor fluidity of the transparent nucleating agent, and due to these problems, there is a disadvantage in that the physical properties of the final product are inferior. There is also an economic loss to put in more than the actual input.

In addition, there are many kinds of nucleating agents currently used in polyolefins, including talc, titanium dioxide, magnesium oxide,

Phosphorus (sodium 2,2'-methylenebis (4,6-di-t-butylphenyl) phosphate,

aluminum dihydroxy [2,2'-methylenebis (4,6-di-t-butylphenyl) phosphate],

aluminum hydroxy bis [2,2'-methylenebis (4,6-di-t-butylphenyl) phosphate],

aluminum tris [2,2'-methylenebis (4,6-di-t-butylphenyl) phosphate],

sodiumbis (4-t-butylphenyl) phosphate and the like, phosphates)

Carbonate, sulfate, and the like, and organic compounds include monocarboxy or polycarboxy and salts thereof (4-tert-butylbenzoic acid, adipic acid; diphenylacetic acid; sodium succinate or sodium benzoate), acetals of aromatic aldehydes, Multifunctional alcohol (sorbitol), high molecular compound (ionic copolymers) and the like.

Among these nuclear agents, sorbitol-based nuclear agents are currently used as the best performing transparent nuclear agents. Sorbitol system is 1,3: 2,4-bis (0-benzylidene) sorbitol, 1,3: 2,4

-bis (0-methylbenzylidene) sorbitol, 1,3: 2,4-bis (0-ethylbenzylidene) sorbitol,

1,3-0-3,4-dimethylbenzylide- ne-2,4-0-benzylidenesorbitol, 1,3-0-benzylidene

-2,4-0-3,4-dimethylbenzylid-enesorbitol, 1,3: 2,4-bis (0-3,4-dimethylbenzylidene)

sorbitol, 1,3-O-p-chlorobenzylidene-2,4-0-3,4-dimethylbenzylidenesorbitol,

1,3-0-3,4-dimethylbenzylidene-2,4-0-p-chlorobenzylidene) sorbitol,

1,3: 2,4-bis (0-p-chlorobenzylidene) sorbitol, etc.

Due to poor fluidity, there is a problem in feeding or feeding.

The present invention aims to solve the above-mentioned disadvantages and to provide a novel composite nucleating agent having a good lubricity and fluidity, easy to insert, and improved transparency, and a method of manufacturing the same.

In order to solve this problem and to improve the performance of the nucleating agent, the sorbitol-based nucleating agent alone or an inorganic nucleating agent or a metal salt-based nucleating agent is mixed with a certain ratio and then coated with a lubricant to improve flow and input properties. In addition, the present invention is to provide a composite nucleating agent having excellent transparency and a method of manufacturing the same.

The present invention to achieve the object as described above;

The present invention is to solve the problems of flowability and inputability of the sorbitol-based nucleating agent in the transparent nucleating agent

To solve this problem, a mixture of sorbitol-based nucleating agents alone or inorganic nucleating agents (such as talc, metal oxides or hydroxides, carbonates or sulfates of alkali metals, hydrotalcites, zeolites, etc.) are mixed at a constant ratio (0.001-50% of the nucleating agent weight). Thereafter, a nucleus coated with an organic substance of a lubricating component and a method of manufacturing the same are provided. The organic substance of the lubricating component used here is C5-C22 acid of RCOOH and metal soap (in saturated or unsaturated fatty acid of C5-C25, Li, Zn, Al, Ca, Mg, Co, Cu, Ti, Na, Zr, Chlorides substituted with K, Ba, Mn, Sn, etc.) or polyhydric alcohols and ester compounds thereof may be used, and other additives such as antioxidants, antistatic agents and other ultraviolet absorbers may be used by coating. Good effect is metal soap system. The amount of coating used here may be 0.001-20% of the weight of the nucleating agent and the coating method may be a simple mixing coating, a grinding coating and a melt coating method, but the simple mixing coating and grinding coating is the most effective and economical have.

(Example)

Sample Preparation (Table 1) (Weight%)

No * Nucleating agent * Sodium-Benzoate * SiO ₂ * Hydrotalcite Ca-St (Coating) One 100 2 95 5 3 80 10 5 5 4 75 10 10 5 5 70 20 5 5 6 90 5 5

o Sample preparation method: Mix each of the formulations 1-8 in Table 1 in the Henschel mixer for 30 minutes to 1 hour, and then grind them with calcium stearate (Ca-St) to form powders. Prepare a sample.

* Nuclear agent: Sorbitol type nuclear agent manufactured by Ciba Specialty Chemical Company (IrgaclearDM)

Sodium-Benzoate: Molecular weight-144.1, Particle Size-4㎛, Melting point-300 ℃

* Hydrotalcite: Doobon Emulsion Co., Ltd. (CLC-120), Particle Size-0.4㎛,

_{Mg 4 A l2 (OH) 12} CO 3 · 3H 2 O

* SiO ₂ : Particle Size-4.6㎛, Moisture Content-1.6%, PH-5.9

* Ca-St: Melting point-150 ～ 160 ℃, Molecular weight-607.03

-Experimental Method: Sample 1-6 prepared by adding the antioxidant (Irganox1010-1000ppm, Irganox168-500ppm) and antistatic agent (GMS-500ppm) to the random propylene copolymer (MI: 4, C2: 3.5%) After 2000ppm was mixed in a Henschel mixer one by one, the extruder was passed through (250 ℃) to melt and then injection molding (250 ℃), the sample was prepared to 1-6 to a thickness of 2mm. For comparison, one blank sample containing only an antioxidant and an antistatic agent was added to the sample 1-6, and the following items were measured.

Results (Table 2)

Properties unit Blank Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 *smell 1-5 One 2.5 2.5 2 1.5 1.5 2 Haze % 71.4 16.8 16.8 16.7 16.8 17.5 16.0 Izod Impact Kgcm / cm 3.7 4.7 4.7 4.8 4.8 4.7 4.7 Tensile.S Kg / cm ² 300 330 330 330 320 330 330 Fluidity of the sample itself condition - Bad Good Good Good Good Good

* The odor is set to 5 for the worst and 1 for the best.

Solving the sorbitol-based nucleating agent, which is difficult to add and transfer among polymer additives, or adding other nucleating agents, and then coating the coating with lubricating components to solve the difficulty of adding and transferring. Can be reduced. In addition, the inorganic nucleating agent and hydrotalcite added together with respect to the peculiar smell of the nucleating agent may have a side effect. In particular, even if the amount of expensive nuclear agent is reduced, the physical properties can be economically affected by the fact that the physical properties remain unchanged or better.

Claims (6)

A method of producing a composite nucleus having excellent flowability and permeability, wherein the sorbitol-based nucleating agent alone or an inorganic nucleating agent is mixed in a predetermined ratio and then coated with an organic substance of a lubricating component. 2. The complex according to claim 1, wherein the inorganic nucleating agent is at least one selected from the group consisting of talc, metal oxa, hydroxide, and alkali metals such as carbonate, sulfate, hydrotalcite, zeolite, and the like. Method for producing type nucleating agent. The method of claim 1, wherein the ratio is 0.001-50% of the nuclear agent weight. The organic substance of any one of claims 1 to 3, wherein the organic substance of the lubricating component is C5-C22 Acid of RCOOH and metal soap or polyalcohol and ester compound thereof, and the amount of the coating agent is 0.001-20% of the weight of the nucleating agent. Method of producing a complex nuclear agent characterized in that. The method of claim 4, wherein the metal soap is Li, Zn, Al, Ca, Mg, Co, Cu, Ti, Na, Zr, K, Ba, Mn, Sn and the like substituted with C5-C25 saturated or unsaturated fatty acid A method for producing a composite nucleating agent, characterized in that at least one member selected from the group consisting of chlorides. 6. The method of claim 5, wherein the coating is a simple mixing coating, a grinding coating or a melt coating.