JP2002001734A - Resin composition for cleaning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition for cleaning suitable for cleaning a processing machine of a thermoplastic resin such as an extruder or the like. SOLUTION: The resin composition for cleaning comprises (a) a thermoplastic resin of 100 pts.wt., (b) an organic phosphorus compound of 0.5 to 20 pts.wt., (c) an anionic surfactant and (d) an alkylene glycol fatty acid ester.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin composition for cleaning a thermoplastic resin processing machine such as an extruder and an injection molding machine.

[0002]

2. Description of the Related Art Thermoplastic resins are widely used in injection molded articles, extruded articles, films and the like. Since these plastic molded products tend to be produced in small quantities of other types and the frequency of switching between types is increasing, cleaning in a molding machine at the time of type switching is becoming important for quality control.

[0003] The following method is known as a method for cleaning a molding machine at the time of switching types in thermoplastic resin molding processing. First, a method of washing with a resin to be used subsequently, that is, a method of replacing a preceding product with a replacement resin without removing a screw. However, this method requires a large amount of resin to flow for cleaning, and has a problem that the loss is increased. Next, there is a method of disassembling and cleaning the forming machine, but this method has a problem that it takes too much time.
For example, in the case of color change in extrusion molding, for example, after stopping the extruder and removing the screw, after washing the inside of the screw and the cylinder by a method such as brushing,
Complicated work such as re-installing the screw is required.

[0004] Instead of these methods, a method of washing with various detergents has been attempted because the amount of the replacement resin is small and the washing operation is simple. However, in the case of the cleaning method using this cleaning agent, the cleaning agent remains after cleaning, causing burning or poor molding. There is a problem that a large amount of resin and a long time are required for the substitution.

[0005] Some detergents have a surfactant added to a thermoplastic resin to improve the detergency. However, the addition of a surfactant reduces friction with a screw of a molding machine or an extruder. However, it is difficult to send the cleaning agent forward, and it takes a long time to perform the cleaning, and in some cases, the cleaning cannot be performed.

The present invention has been made in view of such problems which have not been solved in the related art, and provides a cleaning resin composition which can enhance the detergency to a practical stage and can be easily replaced with a post-treatment agent. The purpose is to:

[0007]

SUMMARY OF THE INVENTION The present invention relates to (a) 100 parts by weight of a thermoplastic resin, and (b) 0.5 to 100 parts by weight of an organic phosphorus compound.
A cleaning resin composition containing 20 parts by weight is provided.

[0008] The resin composition may further contain (c) an anionic surfactant and (d) an alkylene glycol fatty acid ester.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The thermoplastic resin as the component (a) of the present invention is not particularly limited, but may be polyethylene, polypropylene, styrene resin, polymethyl methacrylate,
1 selected from polyamide resin, polycarbonate, etc.
Or two or more.

The organic phosphorus compound as the component (b) of the present invention preferably has at least one ester oxygen atom bonded to a phosphorus atom.

The component (b) includes trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, trioleyl phosphate, triphenyl phosphate, tricresyl phosphate, and trixylenyl. Phosphate, tris (isopropylphenyl) phosphate, tris (o-phenylphenyl) phosphate, tris (p-phenylphenyl) phosphate, trinaphthylphosphate, cresyldiphenylphosphate, xyenyldiphenylphosphate, diphenyl (2-ethylhexyl) phosphate, Di (isopropylphenyl) phosphate, o-
Phenyl phenyl dicresyl phosphate, dibutyl phosphate, monobutyl phosphate, di (2-ethylhexyl) phosphate, monoisodecyl phosphate, 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl-2-acryloyloxy One or more selected from ethyl phosphate, diphenyl-2-methacryloyloxymethyl phosphate and the like can be mentioned, and among these, triphenyl phosphate is preferable.

The component (b) includes phosphites such as triphenyl phosphite, trisnonylphenyl phosphite, tristridecyl phosphite, dibutyl hydrogen diene phosphite and condensates thereof, triphenyl phosphine oxide, One or two or more selected from zylphosphine oxide, diphenyl methanephosphonate, diethyl phenylphosphonate and the like can also be used.

The amount of the component (b) is 100 parts (a)
0.1 to 20 parts by weight, preferably 2 to 1 part by weight
0 parts by weight. When the amount is 0.1 part by weight or more, a sufficient cleaning effect can be imparted, and when the amount is 20 parts by weight or less, contamination in the extruder or the molding machine is suppressed.

The anionic surfactant which is the component (c) of the present invention is not particularly limited, but includes alkyl benzene sulfonate, alkyl or alkenyl ether sulfate, alkyl or alkenyl sulfate, and α-olefin having 8 to 20 carbon atoms. One or more selected from sulfonates, alkyl or alkenyl ether carboxylates, α-sulfone fatty acid salts, α-sulfo fatty acid esters, alkali metal salts of saturated or unsaturated fatty acids having 12 to 20 carbon atoms, etc. be able to.

The amount of the component (c) is 100%.
Preferably it is 0.1-20 weight part with respect to weight part, More preferably, it is 1-5 weight part. When the amount is 0.1 part by weight or more, a sufficient cleaning effect can be imparted, and when the amount is 20 parts by weight or less, contamination in the extruder or the molding machine is suppressed.

The alkylene glycol fatty acid ester as the component (d) is composed of an alkylene glycol such as ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene glycol or the like and a C12 to C22 alkylene glycol.
Is an ester compound with a fatty acid.

The component (d) includes ethylene glycol monolaurate, ethylene glycol dilaurate, propylene glycol monolaurate, propylene glycol dilaurate, tetramethylene glycol monolaurate, tetramethylene glycol dilaurate, hexamethylene glycol monolaurate. , Hexamethylene glycol dilaurate, ethylene glycol monomyristate, ethylene glycol dimyristate, propylene glycol monomyristate, propylene glycol dimyristate, tetramethylene glycol monomyristate, tetramethylene glycol dimyristate, hexamethylene glycol monomyristate , Hexamethylene glycol dimyristate, ethylene glycol monopalmite G, ethylene glycol dipalmitate, propylene glycol monopalmitate, propylene glycol dipalmitate, tetramethylene glycol monopalmitate, tetramethylene glycol dipalmitate, hexamethylene glycol monopalmitate, hexamethylene glycol dipalmitate, ethylene glycol Monostearate, ethylene glycol distearate, propylene glycol monostearate, propylene glycol distearate, tetramethylene glycol monostearate, tetramethylene glycol distearate, hexamethylene glycol monostearate, hexamethylene glycol distearate, Ethylene glycol monooleate, ethylene glycol dioleate, propylene glycol Monooleate, propylene glycoldiolate, tetramethyleneglycol monooleate, tetramethyleneglycoldiolate, hexamethyleneglycol monooleate, hexamethyleneglycoldiolate, ethylene glycol monobehenate, ethylene glycol dibehenate, propylene glycol monobehenate, propylene Examples thereof include one or more selected from glycol dibehenate, tetramethylene glycol monobehenate, tetramethylene glycol dibehenate, hexamethylene glycol monobehenate, hexamethylene glycol dibehenate, and the like.

The amount of the component (d) is 100
Preferably it is 0.1-20 weight part with respect to weight part, More preferably, it is 1-5 weight part. When the amount is 0.1 part by weight or more, a sufficient cleaning effect can be imparted, and when the amount is 20 parts by weight or less, contamination in the extruder or the molding machine is suppressed.

The resin composition of the present invention comprises, for example, (a)
The components (d) can be produced by premixing with a mixer such as a Henschel mixer, a tumbler blender, or a kneader, followed by kneading with an extruder or melt-kneading with a heating roll or a Banbury mixer.

[0020]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the scope of the present invention is not limited to these Examples. The details of each component used in Examples and Comparative Examples are as follows. (A) AS resin: "Sepian-N020" manufactured by Daicel Chemical Industries, Ltd. (b) Organic phosphorus compound: triphenyl phosphate (Daichi Chemical Industry Co., Ltd.) (c) Anionic surfactant: α-olefin sulfonic acid Sodium (Lion Co., Ltd.) (d) Alkylene glycol fatty acid ester: propylene glycol monobehenate (RIKEN Vitamin Co., Ltd.) Examples 1-3, Comparative Examples 1-4 Each component having the composition shown in Table 1 was tumble blended. After mixing, the mixture was melt-kneaded with an extruder to obtain a pellet-shaped resin composition for washing. Using these components, a cleaning test was performed by the following method.

[Evaluation A of Detergency] PA / ABS containing carbon fiber as a pre-use resin (Daicel Chemical Industries, Ltd.) was injected into an injection molding machine ("Mitsubishi Heavy Industries," Mitsubishi Injection Molding Machine 265 / 100MSII "(cylinder temperature 250 ° C.)). 1 kg of a black colored product (carbon black concentration: 1%) manufactured by "NOVALOY AC5704" was used, and the amount of the cleaning resin composition used until the black color disappeared by flowing the cleaning resin composition having the composition shown in Table 1. Then, AS resin (“Sepian-N080” manufactured by Daicel Chemical Industries, Ltd.) was flowed as a subsequent resin and injection-molded. The residue of the cleaning resin composition disappeared on the molded product, and a good product was obtained. AS until it is obtained
The evaluation was made based on the amount of resin used.

[Evaluation B of Detergency] Injection molding machine (Mitsubishi Heavy Industries "Mitsubishi Injection Molding Machine 265 / 100MSII" (cylinder temperature 250 ° C.)) and halogen-based flame-retardant ABS resin (Daicel Chemical Industries, Ltd.) Made "SER2
0 "), and when 500 g of water flow, 30
Stayed for a minute. After the remaining 500 g of the previously used resin was discharged, the cleaning resin composition shown in Table 1 was flown to evaluate the amount of the cleaning resin composition used until the brown or black streak disappeared.

[Evaluation of slipperiness] The cleaning resin composition of Table 1 was put into an injection molding machine (“Mitsubishi Heavy Industries“ Mitsubishi injection molding machine 265 / 100MSII ”(cylinder temperature 250 ° C.)) from a hopper, and the screw position was 0. Evaluation was performed based on the time measured up to 〜100 mm.

[0024]

[Table 1]

As is clear from the comparison of Examples 1 to 3,
The cleaning effect is improved in the order of Examples 1 to 3 by blending the component (c) or the components (c) and (d) further based on the components (a) and (b). ),
By combining the component (b) with the component (c) and the component (d), the cleaning effect could be greatly improved.

[0026]

The resin composition of the present invention has an excellent cleaning effect on extruders, injection molding machines, etc., is very easy to replace with post-agents, and can be used in a short time and in a small amount. Resin and color can be changed by material.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C11D 7/22 C11D 7/22 7/36 7/36

Claims (4)

[Claims] (A) 100 parts by weight of a thermoplastic resin,
(B) A cleaning resin composition containing 0.5 to 20 parts by weight of an organic phosphorus compound. 2. The cleaning resin composition according to claim 1, wherein (b) the organic phosphorus compound is a phosphate compound. 3. The cleaning resin composition according to claim 1, comprising (c) an anionic surfactant in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the thermoplastic resin (a). 4. An amount of (d) an alkylene glycol fatty acid ester of 0.5 parts per 100 parts by weight of the thermoplastic resin (a).
4. The resin composition for cleaning according to claim 1, comprising 2 to 20 parts by weight.