JPS6274941A - Maleic anhydride composition in fine particle form - Google Patents

Abstract

PURPOSE:To provide the titled compsn. having excellent blocking resistance, flow characteristics and workability, by blending maleic anhydride with colloidal silica. CONSTITUTION:0.01-5pts.wt. hydrophilic or hydrophobic colloidal silica is dry-blended with 100pts.wt. maleic anhydride in the form of fine particles or in a molten form.

Description

[Detailed Description of the Invention] [Industrial Application Field] The invention relates to the fluidity of maleic anhydride in the form of fine particles, which is used to modify the physical properties of resins such as polyolefins, such as adhesiveness, dyeing properties, and plating properties. This invention relates to a composition that has improved properties.

[Problems to be solved by conventional technology and invention]

Modified polyolefin α cloud 4 is obtained by reacting a resin such as polyethylene or polypropylene with maleic anhydride, which is an unsaturated carboxylic acid, by heat kneading with 0.1 to 11 parts by weight of 1O in the presence of a radical generator using IJO. It will be done.

The fine particulate anhydrous maleic beak used here is very prone to blocking, and blocking occurs after several hours of exposure.

In the past, fine particulate maleic anhydride caused storage problems and blocking during transportation, so it was necessary to re-pulverize it by hitting it with a mallet or the like before use.

For this reason, there is a demand for maleic anhydride in the form of fine particles that does not cause blocking and has good fluidity in terms of workability such as metering and dispersion mixing during use.

[Means for solving problems]

Wood invention is anhydrous mullein tf! 100 pieces of colloidal silica 0. O1-5 heavy sensitivity, preferably 0.1-5
A particulate maleic anhydride composition comprising 0.5 parts by weight is provided.

In the present invention, the blending amount of colloidal silica is 0.01
If the weight is less than 1 part (I), blocking will occur partially and the fluidity will not be improved.If it exceeds 5 tonne (I), the weight will be less than 1 part (I).
Since the colloidal silica with apparent specific gravity sof/l) scatters and floats, it becomes difficult to mix the colloidal silica uniformly, and furthermore, it deteriorates the transparency of the modified olefin, which is undesirable (83, anhydrous). The combination of D colloidal silica to maleic value is 4!1
Particulate maleic anhydride tecoloidal silica may be mixed into powder using a tumbler, tp2 mixer, etc.
Either hydrophobic colloidal silica or hydrophobic colloidal silica can be used as the silica, and both have a good blocking prevention effect.

When mixing powder, the type of colloidal silica affects 1.
・, t → f, When adding to molten maleic anhydride to form fine particles 1. If hydrophilic brodal silica is added, the crystal grains of maleic anhydride become abnormal, so hydrophobic colloidal silica is better. I like it ^.

〔Effect of the invention〕

The anhydrous maleic tf1 chewing product of the present invention is made by blending a small amount of colloidal silica.
It is a fine particulate anhydrous maleic with good first-flow properties and is easy to work with, and does not impair the physical properties of modified polyolefin, which is its main use, and does not adversely affect the transparency or adhesion of the resin. .

〔Example〕

Next, the present invention will be explained in detail with reference to Examples.

Epas's fine particulate anhydrous Malay yito K9 has a particle size of 12
A maleic anhydride composition was obtained by tri-blending mN colloidal silica (Nippon Aerosil Co., Ltd. - type mixer 105) Example-2 In the same manner as in Example-1, fine particulate maleic anhydride y! I
21OKyK colloidal silica having a particle size of 12 mm (added to the mixture was tri-blended for 1 minute using a tumbler type mixer to obtain a maleic anhydride composition.

Example-3 Melting 5QO at 60℃ in a polyethylene bag with an inner diameter of Jq20t
) 20f, sealed with heat seal, and one piece Gtt
I A reduction rotary machine that is completely fixed and can move up and down on the other side (2
0 times/min) and continued to cool naturally for 5 hours to room temperature to precipitate fine grain crystals. Ta. The obtained crystals were sieved with 10 mesh wire mesh, and 10 mesh of colloidal silica-containing a particulate spider water Malay/acid composition 98 to 9 was obtained using water-dispersible colloidal silica (manufactured by Nippon Aerosil Co., Ltd.?L).
Q i”7 (-, 1ltO8IL, R-972) 20 +I Q
7 addition, t, same as "JM'+lI -3" finely particulate maleic anhydride group 11y, material 9.9 Kg
f get two.

Ratio-'1. Items 1-1 to 4 Comparative Example 1: To prevent all blocking, the anhydrous maleic compound shown below was used as a lubricant for powder products. Additive-free 80° ratio M @ -2° car 2° mustearate 1 oop formulation 0 Comparative example-3, polyethylene wax (Sanowax 171 Pl 3o manufactured by San4 Kasei ■).

? combination.

combination.

Flowability Test 5 tl Of of maleic anhydride obtained from the microparticles obtained in Examples 1 to 4 and Comparative Examples 1 to 4 was examined.

The results are shown in Table-1.

Table-1 Interval; I section (part) Flow impediment; implementation・°−・
°゛ Good fluidity 1' comparison row -
10 (7J14 without additives) solidifies and does not flow 1: Comparative g7II-2'l No fluidity, flows if strongly encouraged ・ □Comparative Example-43 Solidifies and does not flow: 1
-111111'' (pronounced) is maleic anhydride 10 + 1.5 times the combination of protsuki blowfish prevention and cutting for heavy trenches 1 mouse size 1.

, 2-t binding, the present invention has good flowability,
It is clear that even with addition of 1 layer and 1 part ill, no bulges occur.

Claims (1)

[Claims] 0.0 parts by weight of colloidal silica in 100 parts by weight of maleic anhydride
A fine particulate maleic anhydride composition containing 1 to 5 parts by weight.