JPS6039296B2 - Polyolefin resin composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyolefin resin composition containing an inorganic filler.

Conventionally, polyolefin resins such as polyethylene and polypropylene are mixed with inorganic fillers such as calcium carbonate, mica, and clay, and molded by extrusion molding or injection molding. There were disadvantages in that physical properties such as tensile strength, elongation at break, and impact strength decreased.

In order to improve this, a method is sometimes used in which a coupling agent such as a silane coupling agent or a titanium coupling agent is used in combination, but both coupling agents use water as a medium to combine polyolefin resin and inorganic filler. Since it binds , it is less effective when molding is carried out at high temperatures, and the coupling agent is expensive, so it has the disadvantage that it is usually difficult to use with general-purpose polyolefin resins.

The present invention was made with the aim of overcoming the above-mentioned conventional drawbacks and producing a polyolefin resin composition that provides excellent properties in terms of moldability and mechanical strength. , polyolefin resin, inorganic filler, general formula (R is an alkyl group having 8 to 22 carbon atoms, a, b
, c, d are integers of 1 or more and a + b + c + d satisfy 4 to 10, A is an organic acid, and m is 0 or an integer of 1 to 3). present in the composition.

Examples of the polyolefin resin used in the present invention include polyethylene, polypropylene, polybutene, and ethylene-propylene copolymer.

Examples of the inorganic filler used in the present invention include calcium carbonate, clay, mica, and glass fiber.

The general formula used in the present invention (R is an alkyl group having 8 to 22 carbon atoms, a, b, c, d are integers of 1 or more and a + b + c + d satisfies 4 to 10, A is an organic acid, Examples of the compound represented by (m is 0 or an integer of 1 to 3) include the lowest chain alkyl triamine condensates such as .

In the present invention, the amount of inorganic filler added is relatively large, ranging from 20 to 100 parts by weight per 100 parts by weight of the polyolefin resin.
40 parts by weight are added.

In the present invention, the amount of the compound represented by the general formula [li] added is preferably 0.2 to 10 parts by weight based on 10 parts by weight of the inorganic filler.

The amount of the compound represented by the general formula '1} is inorganic filler 1
If it is less than 0.2 parts by weight relative to 0 parts by weight, the physical properties of the molded product will not improve much compared to those without the addition, and
When the amount of inorganic filler relative to the polyolefin resin is large, moldability deteriorates. Furthermore, if the amount of the compound represented by the general formula (1} exceeds 1 part by weight per 10 parts by weight of the inorganic filler, the physical properties of the molding amount may deteriorate, even though the amount added is large.
Moldability is not very good. In the polyolefin resin composition of the present invention, an inorganic filler and a compound represented by the general formula (1) are added to a polyolefin resin, so that it is difficult to prevent the inorganic filler from adding a large amount to the polyolefin resin. However, during or after molding, the polyolefin resin and the inorganic filler are effectively bonded by the compound represented by the general formula '1}, and the molded product has good moldability and excellent physical properties. Become.

The present invention will be explained below using examples. Example 1 For 100 parts by weight of high-density polyethylene, each
100 parts by weight of calcium carbonate, clay or mica and 1 part by weight of a good chain alkyl triamine condensate were mixed, rolled into a sheet, a sample was taken from this, and the tensile strength at 20:00 was measured according to JISK 7113. In addition, the Charpy impact strength at 0° C. was measured according to JISK 7111.

For comparison, measurements similar to those described above were also carried out on products to which no long-chain alkyltriamine condensate was added.

These results are shown in Table 1. Table 1 As is clear from Table 1, the polyolefin resin in which an inorganic filler and the closest alkyl triamine condensate are added, as in the examples of the present invention, It has better moldability and physical properties than those to which no condensate is added.

Claims (1)

[Claims] 1. A polyolefin resin, an inorganic filler, and the general formula ▲
There are mathematical formulas, chemical formulas, tables, etc. ▼ (R is an alkyl group with 8 to 22 carbon atoms, a, b, ε, d are integers of 1 or more and a + b + c + d satisfies 4 to 10, A is an organic acid, m is 0 or an integer from 1 to 3).