JPS6220538A - Granules - Google Patents

Abstract

PURPOSE:To obtain granules of good dispersibility in resin, improved in physical problems such as workability, by blending specific compounds and metallic soap or lubricant. CONSTITUTION:The objective granules with an average size 100-2,000mum can be obtained by blending (A) at least one kind of mixture consisting of compounds of formula I or II (R is 10-22C alkyl or alkenyl; M is Zn, Ba, Mg, etc.) and (B) metallic soap (e.g., zinc stearate) or lubricant (e.g., stearic acid, palmitic acid) in the weight ratio A/B:1-10/10-1.

Description

[Detailed description of the invention] The present invention relates to a new granule suitable as a resin additive.

Traditionally, powdered resin additives have had various drawbacks such as hygiene problems due to dust scattering and workability problems due to the conical shape of automatic metering, so attempts have been made to granulate them, and various methods have been developed. Proposed.

Inorganic lead compounds are generally used as powdered resin additives.

These include metal soaps, antioxidants, ultraviolet absorbers, lubricants, and phosphoric acid compounds.

However, since the main purpose of conventional granulated products was physical improvements such as dust prevention and automatic metering, when they were actually added to resins, there were problems with dispersibility in cypress fat. In addition to physical problems, the dispersibility of certain types of compounds in powder form was extremely poor.

By selecting a certain specific component of the above-mentioned material, the present inventors have discovered a granular material that not only improves the above-mentioned physical problems but also has good dispersibility in resins.

That is, the granules of the present invention contain one or more of the mixtures of the general formula (%) and one or more selected from metal soaps or lubricants, and have an average particle diameter of 100 μm to 2000 μm.
It is a granular material of m.

(Iroshi R is an alkyl group or alkenyl group having carbon V110 to 22, M is Zn, Da, Mg, Ca, Sr) Above [1
], [II] was selected because this compound is widely used as a resin additive, and it is a compound that exhibits excellent effects on heat stability, aging resistance, processability, etc. If it remained in powder form, there were problems with dispersibility.

Also, because metal soaps and lubricants are often used in combination with mixtures of [11, [11], most metal soaps and
Since the lubricant has a lower melting point (liquefaction temperature) than the mixture of [1] and [II], the granular product granulated by mixing with the mixture of [I] and [II] has a lower melting point (liquefaction temperature) than the mixture of [I] and [II]. liquefaction temperature), and the entire product softens or melts at the melting point of the component with a low melting point (liquefaction temperature).

The reason for setting the average particle size to 100 μm to 2000 μm is 1.
If it is less than 00/A, the dust prevention effect and automatic needleability 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 rotor that rotates rapidly (about 500 rpm or more) is used. A method of granulation using a powder mixer is preferred. The obtained granular product can be sieved and adjusted to a predetermined particle size. [:I] [The ratio of the mixture of nl and the metal soap or lubricant is not particularly limited, but it is usually 1-
It is preferable to granulate at a ratio of 10:10-1 from the viewpoint of workability and 2-dispersibility.

General formula used in the present invention %formula% [] Examples of compounds represented by O0 include the following: etc.

Next, the metal soaps used in the present invention include the following.

These include zinc stearate, zinc oleate, zinc palmitate, zinc mystilate, zinc laurate, zinc behenate, subsalt 12-hydroxystearate, calcium stearate, calcium palmitate, calcium laurate, and magnesium stearate. Examples of lubricants include the following. stearic acid, palmitic acid.

Hehenic acid, methylene bisstearylamide.

Ethylene bisstearylamide, stearamide, sudearyl monoglycerite, stearyl alcohol, heptyl alcohol, dipentaerythritol hexastearate, sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, tristearyl phosphate, di These include stearyl phosphoric acid, distearyl 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 added to various resins, whether thermoplastic or thermosetting, in combination with other components depending on the purpose and use. Examples of the resin include polyvinyl chloride and polyvinylidene chloride.

Chlorine-containing resins such as chlorinated polyethylene, vinyl chloride-vinyl acetate copolymer 9, and polyester resins.

Polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, AIDS 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) 20
Pour into super mixer No. 1 and mix at 200 rpm, No. 2
The mixture was rapidly stirred for 0 minutes, and then sized at 500 rpm for 5 minutes. After cooling, the mixture was sieved and classified into 20 to 100 meshes to obtain granules No. 1 shown in Table 1. The melting point (liquefaction temperature) was 1 [1/L to 187°C, the bulk was 1.8 ml/g, and the average particle diameter was 26071 m.

Granulation Example 2 1 kg of the mixed powder of zinc distearyl phosphate and zinc monostearyl phosphate used in Granulation Example 1 and zinc stearate (synthesized from stearic acid and zinc white by a dry method and pulverized) (1 kg) was placed in a 201 super mixer, rapidly stirred at 200 rpm for 15 minutes, and then sized at 500 rpm for 5 minutes. After cooling, it was classified using a 20 mesh to 100 mesh sieve, and the granular material No. in Table 1 was classified.
, got 3. The melting point (liquefaction temperature) was 122 to 125°C, the bulk was 2.0 ml/g, and the average particle diameter was 320 μm.

Granulation Example 3 1 kg of the mixed powder of zinc distearyl phosphate and zinc monostearyl phosphate used in Granulation Example 1 and 11 g of methylene bisstearylamide were charged into a 201 super mixer, and 20 g was mixed at 1700 rpm. The mixture was rapidly stirred for 1 minute, and then sized at 500 rpm for 5 minutes.After cooling, 2
Classified with a sieve of 0 mesh to 100 mesh, Table 1
Granular materials No. G were obtained. Melting point (liquefaction temperature) 143~
145℃, bulk 1.7ml/g, average particle size 310μm
Met.

The granules shown in Table 1 were prepared in a similar manner.

(The numerical value represents the ffi amount ratio) Compound usage example 1 The composition shown in Table 2 is 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. Ta.

*l Example 2 of using the powder mixture used in Granule Formation Example 1 The mixture in Table 3 was kneaded for 5 minutes with a roll at 170°C.
The dispersion state of the additive was visually observed and evaluated as an f value.

Table 3

Claims (1)

[Claims] (1) One or more mixtures of general formulas ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [I] and ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [II] and one or more selected from metal soaps or lubricants. Containing average particle size 100μm ~ 2000μm
m granules. (However, R is an alkyl group or alkenyl group having 10 to 22 carbon atoms, and M is Zn, Ba, Mg, Ca, or Sr.) (2) The melting point of the metal soap or lubricant is that of the mixture of general formulas [I] and [II]. The granular material according to claim 1, which has a melting point lower than the melting point.