JPH0242375B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel particulate material suitable as a resin additive. Conventionally, powdered resin additives have various drawbacks such as hygiene problems due to dust scattering, workability problems such as difficulty in automatic measurement, etc., so attempts have been made to granulate them, and various methods have been developed. Proposed. Generally, powdered resin additives include inorganic lead compounds, metal soaps, antioxidants, ultraviolet absorbers, lubricants, and organic phosphoric acid compounds. However, since the main purpose of conventional granulated products was physical improvements such as dust prevention and automatic metering, there were problems with dispersibility in the resin when they were actually added to the resin. In particular, when some compounds are in powder form, dispersibility is a serious problem in addition to physical problems. By selecting a specific component with the above-mentioned problem, the present inventors have found a granular material that not only improves the above-mentioned physical problem but also has good dispersibility in resin. That is, the granular material of the present invention has the general formula and containing one or more of the mixtures thereof and one or more selected from metal soaps or lubricants with a diameter of 100 μm or more
It is a granular material of 2000μm. (However, R is an alkyl group or alkenyl group having 10 to 22 carbon atoms, and M is Zn, Ba, Mg, Ca, or Sr.) The reason for selecting the mixture of [] and [] above is as follows.
This compound is commonly used as a resin additive, and while it is a compound that exhibits excellent effects on heat stability, weather resistance, and processability, it also has problems with dispersibility when it is in powder form. It is. Also, this is because metal soaps and lubricants are often used in combination with mixtures of [] and [], and at the same time, most metal soaps and lubricants have a lower melting point (liquefaction temperature) than mixtures of [] and []. The melting point (liquefaction temperature) of the granular product granulated by mixing with the mixture of , [], [] decreases, and the entire product softens or melts at the melting point of the component with a lower melting point (liquefaction temperature). It has characteristics. The reason why the average particle size was set to 100 μm to 2000 μm is because
If it is less than 100 μm, the dust prevention effect and automatic metering performance will not be sufficient, and if it is more than 2000 μm, it will not be completely melted within the processing time of the resin, resulting in poor dispersion. The granulation method used in the present invention is not particularly limited, and conventionally known spray granulation methods, crushing granulation methods, etc. can be adopted, but in particular, a rapid mixer, that is, a rapidly rotating (approximately
A method of granulation using a powder mixer equipped with a rotor (at least 500 rpm) is suitable. The obtained granular product can be sieved and adjusted to a predetermined particle size. There is no particular restriction on the ratio of the mixture [], [] to the metal soap or lubricant, but it is usually 1-10:10-10.
It is preferable to granulate with No. 1 from the viewpoint of workability and dispersibility. General formula used in the present invention and Examples of the compound represented by the above include the following. etc. Next, the metal soaps used in the present invention include the following. Zinc stearate, zinc oleate, zinc palmitate, zinc mystilate, zinc laurate,
These include zinc behenate, subsalt 12-hydroxystearate, calcium stearate, calcium palmitate, calcium laurate, and magnesium stearate. Examples of lubricants include the following. stearic acid, palmitic acid,
Behenic acid, methylene bisstearylamide,
Ethylene bisstearylamide, stearamide, stearyl monoglyceride, stearyl alcohol, cetyl alcohol, dipentaerythritol hexastearate, sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, tristearyl phosphate, distearyl phosphate, distearyl These include pentaerythritol diphosphite, tetrastearyl hydrogenated bisphenol A diphosphite, and the like. It should be noted that the granules according to the present invention may contain components other than the above-mentioned components, as long as the dispersibility is not affected. Moreover, the granules are thermoplastic,
Regardless of thermosetting properties, it is added to various resins in combination with other components depending on the purpose and use. Examples of resins include chlorine-containing resins such as polyvinyl chloride, polyvinylidene chloride, chlorinated polyethylene, vinyl chloride-vinyl acetate copolymers, polyester resins, polyethylene resins, polypropylene resins, polystyrene resins, polycarbonate resins, and ABS.
Resin, EVA resin acrylic resin, vinyl acetate resin,
Synthetic rubber, etc. This will be explained below using examples (granulation examples, blending usage examples). Granulation example 1 2 kg of mixed powder of zinc distearyl phosphate and zinc monostearyl phosphate (weight ratio 1:1.4, melting point [liquefaction temperature] 185-188°C, bulk 9.7 ml/g)
201 super mixer, 2000rpm
The mixture was rapidly stirred for a minute and then sized at 500 rpm for 5 minutes. After cooling, the mixture was classified using a 20 to 100 mesh sieve to obtain granular material No. 1 shown in Table 1. Melting point (liquefaction temperature) 184-187℃, bulk 1.8ml/g average particle diameter
It was 260μm. Granulation example 2 1 kg of mixed powder of zinc distearyl phosphate and zinc monostearyl phosphate used in granulation example 1
and 1 kg of zinc stearate (synthesized and pulverized from stearic acid and zinc white using a dry method) were placed in a 201 super mixer, rapidly stirred at 2000 rpm for 15 minutes, and then sized at 500 rpm for 5 minutes. After cooling, it is classified using a 20 mesh to 100 mesh sieve.
Granular material No. 3 shown in Table 1 was obtained. Melting point (liquefaction temperature)
122-125℃, bulk 2.0ml/g, average particle size 320μm
It was hot. Granulation Example 3 1Kg of mixed powder of zinc distearyl phosphate and zinc monostearyl phosphate used in Granulation Example 1
and 1Kg of methylene bisstearylamide at 201
The mixture was charged into a super mixer, rapidly stirred at 1700 rpm for 20 minutes, and then sized at 500 rpm for 5 minutes.
After cooling, the mixture was classified using a 20 to 100 mesh sieve to obtain granular material No. 6 shown in Table 1. Melting point (liquefaction temperature) 143-145℃, bulk 1.7ml/g, average particle size
It was 310μm. The granules shown in Table 1 were prepared in a similar manner.

【table】

[Table] Formulation Example 1 The formulation shown in Table 2 was kneaded with a roll at 150°C, and the time required for the additive to be completely dispersed in the film and for there to be no undispersed particles is shown.

【table】

[Table] *1 Example of using the powder blend used in Granulation Example 1 2 The blend in Table 3 was kneaded for 5 minutes with a roll at 170°C, and the dispersion state of the additive was observed and evaluated with the naked eye.

【table】

【table】

Claims (1)

[Claims] 1. General formula and containing one or more of the mixtures thereof and one or more selected from metal soaps or lubricants with an average particle size of 100 μm or more
2000μm granules. (However, R is an alkyl group or alkenyl group having 10 to 22 carbon atoms, M is Zn, Ba, Mg, Ca, Sr) 2 The melting point of the metal soap or lubricant is the general formula []
The granular material according to claim 1, which has a melting point lower than the melting point of the mixture of and [ ].