JP2001059059A - Resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition which allows uniform mixing and kneading with plural kinds of resin mixtures without causing discoloration and deterioration under usual processing conditions using a general-purpose processing kneading machine for plastics. SOLUTION: This resin composition is formed by compounding plural kinds of resin mixtures and an ester compound having at least one either bond having the general chemical formula represented by the formula: R(EO)mOOC-X-COO (EO)nR (X denotes a 2-12C alkyl group, an aromatic group or a residue of an alicyclic dibasic acid; Rs denote each a 1-15C alkyl group which may be same or different; Es denote such a 2-4C alkyl group; m is an integer of 1-7; n is an integer of 0-7) in an amount of 1.0-50.0 pts.wt. based on 100 pts.wt. of the resin mixtures.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition in which plural kinds of resin mixtures are kneaded and uniformly dispersed.

[0002]

2. Description of the Related Art Similar resins, such as non-polar resins or polar resins, are easily melted and mixed, but non-polar resins and polar resins, such as polyolefin resins and vinyl chloride resins, are mixed with a conventional processing kneader. Cannot be dispersed uniformly. At the present time, when these mixtures are molded into final products, they are almost unusable in appearance and quality in most cases. However, although the necessity of material recycling of synthetic resins has been actively talked about recently, recovered resins are rarely of a uniform composition, and are usually a mixture of plural kinds. In order to effectively use this mixture as a resource, it may be one means to separate the mixture into the same composition. However, from the viewpoint of economy, it is more efficient to uniformly disperse and mix and knead the mixture.

As a method of uniformly kneading and mixing, there is a method of mixing a copolymer of a nonpolar resin and a polar resin. However, in this method, it is often difficult to copolymerize a polar monomer and a non-polar monomer from the beginning, and even if a copolymer is obtained, there are many economical problems in terms of yield and monomer cost, and this method has been put to practical use. Is less.

Another method is a method of forcibly adding a shear by using a special processing kneader to knead and disperse.
However, in this method, the resin tends to deteriorate due to shearing, and it is often difficult to put the resin into practical use due to discoloration, odor, smoke during processing, or the like.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a general-purpose processing kneader and a resin composition based on a plurality of resin mixtures which can be uniformly mixed and kneaded without discoloration or deterioration under ordinary processing conditions.

[0006]

The inventors of the present invention have studied the above problems, and as a result, based on 100 parts by weight of a mixture of plural kinds of resins, an ester compound having at least one ether bond represented by the following general formula.

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[0007] _{R (EO) m OOC-X} -COO (EO) n R ( Formula 1) (wherein, X is an alkyl group having 2 to 12 carbon atoms, an aromatic group,
Or an alicyclic dibasic acid residue, R represents an alkyl group having 1 to 15 carbon atoms which may be the same or different, and E represents 2 carbon atoms.
And m represents an integer of 1 to 7 and n represents an integer of 0 to 7)
The present inventors have found that a resin composition containing parts by weight is a solution to the present problem, and have reached the present invention.

More specifically, (1) a resin composition comprising 100 to 100 parts by weight of a mixture of plural kinds of resins and 1.0 to 50.0 of an ester compound represented by the formula 1; No effect at less than 1.0 parts by weight, 5
If the amount is more than 0.0 parts by weight, it is difficult to work because it does not bite into the working kneader. (2) The resin compound according to claim 1, further comprising 0.1 to 5.0% by weight of a perchlorate based on the ester compound. When the content is less than 0.1% by weight, there is no effect, and when the content is more than 5.0% by weight, the deterioration of the resin is rather accelerated. (3) One additional 100 parts by weight of the resin mixture of plural kinds
The resin composition according to claim 1 or 2, wherein the resin composition comprises less than 80 parts by weight of an inorganic filler or an organic filler. 18
If it is 0 parts by weight or more, it is difficult to mix and knead with a normal processing machine.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The resin used in the present invention is not particularly limited, but among a plurality of kinds of resins, a mixture of a polar resin and a non-polar resin is particularly effective. For example, as the polar resin, vinyl chloride resin, acrylic resin, vinyl acetate resin amide resin, urea resin, phenol resin,
Examples include polyester resin, polyurethane resin, natural rubber, various synthetic rubbers (excluding ethylene propylene rubber), and the like.

As the non-polar resin, low density polyethylene, high density polyethylene, linear low density polyethylene,
Examples include metallocene-based polyethylene, polypropylene and copolymers thereof, polybutene, polymethylpentene-1, ethylene propylene rubber and the like.

In the composition of the present invention, various additives usually added to the synthetic resin, for example, heat stabilizers, antioxidants, light stabilizers, antistatic agents, nucleating agents, lubricants, pigments , A processing aid, an impact modifier and the like can be used in combination within a range not to impair the object of the present invention.

【Example】

[0012]

Examples 1 to 3, Comparative Examples 1 and 2 Vinyl chloride resin (S1
008, polymerization degree 800; 50 parts by weight, manufactured by Kaneka Corporation, low-density polyethylene (Suntech M2115, MI; 1.3)
5, 50 parts by weight of Asahi Kasei), one pack stabilizer (consisting of 50% by weight of polyethylene resin, 20% by weight of metal soap, 20% by weight of polyethylene wax, 5% by weight of antioxidant, 5% by weight of heat stabilizer) 0 parts by weight, tin-based stabilizer (KS
18; manufactured by Kyodo Yakuhin) 0.6 parts by weight, epoxidized soybean oil 1.0 part by weight, calcium stearate 1.2 parts by weight,
2.5 parts by weight of a pigment masterbatch for vinyl chloride (containing 20% by weight of phthalocyanine blue; manufactured by Toyo Ink Co., Ltd.) was added to dibutyl cellosolve phthalate 0, 3.0, 10,
30 and 60 parts by weight were blended, and the mixture was stirred by a 20 L mixer (manufactured by Kawada Seisakusho) set at 80 ° C. until dried up. This mixture was mixed with a 40 mm single screw extruder (PSM40;
Granulated by IKG Co., Ltd.). (Granulation conditions: Die temperature: 185 ° C., screw rotation speed: 25 rpm) The granulated pellets were formed into a sheet having a thickness of 0.4 mm by a press set at 190 ° C., and the kneading dispersibility of both resins was evaluated from the dispersibility of the pigment. did. Further, a tensile test was performed (Autograph Model S100; manufactured by Shimadzu Corporation), and tensile strength and elongation were measured (JIS K6760). During the process, phase separation of the sample dumbbell was observed. Table 1 shows the results.

[0013]

Examples 4 to 7, Comparative Examples 3 and 4 Vinyl chloride resin (S1
008, degree of polymerization 800; 50 parts by weight, manufactured by Kaneka Co., Ltd., 50 propylene copolymer (Tokuyama PER; manufactured by Tokuyama) 50
Parts by weight, 1.0 part by weight of one-pack stabilizer, tin stabilizer (K
S18; manufactured by Kyodo Yakuhin) 0.6 parts by weight, epoxidized soybean oil 1.0 part by weight, calcium stearate 1.2 parts by weight, dibutyl cellosolve phthalate 20 parts by weight,
Lithium perchlorate was added at 0, 0.05, 0.1, 0.
3, 1.0 and 2.0 parts by weight were blended. 170 ℃
Into a roll of 8 inches (manufactured by Nishimura Seisakusho), and the state of winding around the roll, the rotation of the bank between the rolls, the kneading state for 5 minutes, and the peeling state when removing from the roll were observed. Furthermore, after observing the surface state of the sheet taken out and heat-treating it at 80 ° C. for 24 hours, the state of seepage of liquid on the sheet surface was examined. Table 2 shows the results.

[0014]

Examples 8 to 10 and Comparative Examples 5 and 6 50 parts by weight of a pulverized product (hereinafter referred to as fluff) of a used vinyl film for agriculture (hereinafter abbreviated as waste agricultural plastic) and a polyethylene film for a used agriculture (hereinafter abbreviated as waste agricultural With respect to 50 parts by weight of fluff (abbreviated as poly) and 1.0 part by weight of one-pack stabilizer, 0, 3.0, 10, 30, and 60 parts by weight of diethyl cellosolve adipate were blended, and mixed with a 20 L mixer. The same evaluation as in Examples 4 to 7 was carried out by feeding into two 8-inch rolls set at ~ 180 ° C. Table 3 shows the results.

[0015]

Examples 11 to 13 and Comparative Example 7 Including 50 parts by weight of waste agricultural plastic fluff, 50 parts by weight of waste agricultural poly fluff, 1.0 part by weight of one-pack stabilizer, and 1.5% by weight of lithium perchlorate. To 30 parts by weight of diethyl cellosolve adipate, talc (HK9; manufactured by Hayashi Kasei) was added to each of 50, 100, 150 and 2 parts.
, 100 parts by weight, and mixed with a 20 L mixer.
It was put into an 8-inch two-roll set at 75 ° C. and evaluated in the same manner as in Examples 4 to 7. Table 4 shows the results.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

[0019]

[Table 4]

Claims (3)

[Claims] (1) 100 parts by weight of a mixture of plural kinds of resins,
At least an ester compound having one ether bond _{R (EO) m OOC-X} -COO (EO) n R ( Formula 1) (wherein the general formula is represented by the following formula, X is an alkyl having 2 to 12 carbon atoms Group, aromatic group,
Or an alicyclic dibasic acid residue, R represents an alkyl group having 1 to 15 carbon atoms which may be the same or different, and E represents 2 carbon atoms.
And m represents an integer of 1 to 7 and n represents an integer of 0 to 7)
A resin composition containing parts by weight. 2. The resin composition according to claim 1, further comprising 0.1 to 5.0% by weight of a perchlorate based on the ester compound. 3. The resin composition according to claim 1, further comprising less than 180 parts by weight of an inorganic filler and / or an organic filler based on 100 parts by weight of a mixture of plural kinds of resins.