JPH0635592B2 - Cleaning agent for mold making - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cleaning agent for mold making.

[Conventional technology and problems]

Conventionally, when a mold is manufactured, a resin and sand are mixed, and the mixture is reacted and fixed to the mold. At this time, the reaction product adheres to a model, a metal frame, a kneading sand hopper, etc., and its removal has been a problem conventionally. In particular, when an organic binder such as a furan resin is used as a binder for a mold, there is a problem that the organic binder is often attached. There is also a problem that it is easy to adhere to the vent (air vent) of the mold, which is difficult to clean.

Heretofore, as a method for removing such an adhered substance, a method of physically removing with a hammer, a brush, a shot plast, etc., a method of dissolving and removing with an appropriate solvent, etc. have been proposed.

However, in the case of a mold having a complicated structure, it is difficult to say that it is the best method in the case of a mold having a complicated structure, because a human has to do it manually, which requires labor and time, and is easily scratched. In the solvent method, the removal usually requires one week or more, and often the removal is incomplete, and it is necessary to further brush after the treatment.

Further, JP-A-59-153542 discloses a template deposit removing agent containing dimethylsulfoxide and a surfactant such as a fluorine-based surfactant and a hydrocarbon-based anion surfactant. However, this removing agent also cannot sufficiently remove the deposits.

[Means for solving problems]

The present inventors have completed the present invention as a result of intensive research to solve the above conventional problems.

That is, the present invention is 30% by weight or more of water, and 0.1 to 30% by weight of at least one surfactant selected from the following (A) to (N)
Or 30% by weight or more of water, the following (A) ~
(N) at least one surfactant 0.1 to 30
The present invention provides a cleaning agent for producing a mold, comprising a weight% and at least one solvent selected from the following (a) to (j).

(A) R ₁ SO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups).

(B) (However, R ₂ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups).

(C) (However, R ₃ is H or an aliphatic hydrocarbon group having 1 to 4 carbon atoms,
M is Na, K, ammonium or alkanol ammonium group).

(D) R ₁ OSO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups).

(E) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20).

(F) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20).

(G) (However, R ₅ is an aliphatic hydrocarbon group having 2 to 20 carbon atoms, and M is N
a, K, ammonimuu or alkanol ammonium group).

(H) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium group, m ₁
Is 1 or 2 and n ₂ is 1 or 2).

(I) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100).

(J) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and n ₃ is 1 to 100).

(K) Polyoxyethylene sorbitan alkyl or aryl ester.

(L) Polyoxyethylene propylene block polymer.

(M) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and m ₂ , n
₄ is an integer from 0 to 100, but m ₂ and n ₄ are not 0 at the same time).

(N) R ₁ COOM (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium groups).

(a) Aliphatic alcohol having 1 to 4 carbon atoms (b) Hydroxy-substituted or unsubstituted aliphatic carboxylic acid having 1 to 4 carbon atoms (c) Aliphatic ketone having 3 to 8 carbon atoms (d) 6 to 10 carbon atoms A phenolic compound (e) a cyclic ether having 4 to 6 carbon atoms (f) a cyclic ester having 4 to 6 carbon atoms (g) a halogenated hydrocarbon having 1 to 4 carbon atoms (h) an alkyl-substituted or unsubstituted formamide or Acetamide (i) N-alkyl-substituted or unsubstituted cyclic amide having 4 to 5 carbon atoms (j) Aliphatic nitrile having 2 to 4 carbon atoms In the present invention, among the above surfactants, (A) to (B ), (D) to (F), (I) to (K), and (M) to (N) are preferable, and further (A) to (B) and (D) to (F).
, (N) are particularly preferable.

Among the above (a) to (j), those containing at least one of the following (a ') to (j') are particularly preferable.

(a ') aliphatic alcohol having 1 to 2 carbon atoms (b') hydroxy-substituted or unsubstituted aliphatic carboxylic acid having 1 to 3 carbon atoms (c ') aliphatic ketone (d') carbon having 3 to 5 carbon atoms C6-8 phenolic compound (e ') C4 cyclic ether (f') C4 cyclic ester (g ') C1-3 chlorinated hydrocarbon (h') alkyl-substituted formamide Or acetamido (i ') N-alkyl-substituted or unsubstituted cyclic amide having 4 carbon atoms (j') aliphatic nitrile having 3 carbon atoms Further, (a ') to (b'), (e ') to Those containing at least one of (h ') and (i') are particularly preferable.

The cleaning agent of the present invention is preferably used for cleaning a model when a mold is manufactured, using a room-temperature self-hardening or gas-curing organic binder as a binder.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Examples 1 to 4 and Comparative Examples 1 and 2 Furan resin and organic sulfonic acid are added to silica sand to produce a mold. Furan self-hardening, 30 kg / Bat mixer with 30 k of silica sand.
g, furan resin 360 g, xylene sulfonic acid type curing agent 150
g and kneaded for 1 minute and then discharged.

This was repeated 100 times, and a certain amount of the cleaning agent shown in Table 1 was applied to the silica-containing deposits adhering to the mixer and the mixing blades, and the removability and rusting condition, and the curability of the kneaded sand after removal were evaluated.

The results are shown in Table 1.

Examples 5-8 and Comparative Examples 3-4 A furan resin and an organic peroxide were added to silica sand, and an acid-curable cold box for producing a mold by injecting sulfurous acid gas was repeatedly used with a mold to mold the mold 500 times. did.

After molding, in order to remove the contaminants adhering to the surface of the model, the cleaning agent shown in Table 2 was applied and the cleaning / removing property after standing and rust
The moldability after removal was evaluated.

The results are shown in Table 2.

Examples 9 to 10 and Comparative Examples 5 to 6 At the time of core production in a urethane cold box in which aerosol-like triethylamine is injected and cured, silica sand 10
10 parts by weight of a phenolic polyol resin solution to 00 parts by weight,
10 parts by weight of a methylenebisbenzene diisocyanate solution was added and kneaded, and molding was repeated 500 times by an automatic molding machine. Various cleaning agents shown in Table 3 were applied to the silica-containing contaminants adhering to the kneading sand hopper installed in the automatic molding machine, and the removability, rust, and mold formability after the removal were examined.

The results are shown in Table 3.

Examples 11 to 12 and Comparative Examples 7 to 8 Furan resin and an organic sulfonic acid type curing agent are added to silica sand to produce a mold. Furan is self-hardening and 1000 parts by weight of regenerated silica sand,
A mold was produced using 8 parts by weight of furan resin and 4 parts by weight of a toluene sulfonic acid type curing agent. A model for mold production, which was repeatedly molded 50 times, to remove contaminants adhering to the metal frame.
The following cleaning agents were applied, and the removability, rusting, and moldability after cleaning and removal were evaluated.

The results are shown in Table 4.

Claims (6)

[Claims] 1. A mold manufacturing detergent comprising 30% by weight or more of water and 0.1 to 30% by weight of at least one surfactant selected from the following (A) to (N). (A) R ₁ SO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (B) (However, R ₂ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (C) (However, R ₃ is H or an aliphatic hydrocarbon group having 1 to 4 carbon atoms,
M is Na, K, ammonium or alkanol ammonium group). (D) R ₁ OSO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (E) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (F) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (G) (However, R ₅ is an aliphatic hydrocarbon group having 2 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (H) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium group, m ₁
Is 1 or 2 and n ₂ is 1 or 2). (I) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100). (J) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and n ₃ is 1 to 100). (K) Polyoxyethylene sorbitan alkyl or aryl ester. (L) Polyoxyethylene propylene block polymer. (M) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and m ₂ , n
₄ is an integer from 0 to 100, but m ₂ and n ₄ are not 0 at the same time). (N) R ₁ COOM (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium groups). 2. A surfactant is (A) to (B), (D) to (F),
The cleaning agent according to claim 1, which is at least one selected from (I) to (K) and (M) to (N). 3. The surfactants (A) to (B), (D) to (F),
The cleaning agent according to claim 2, which is at least one selected from (N). 4. At least 30% by weight of water and 0.1 to 30% by weight of at least one surfactant selected from the following (A) to (N):
A mold manufacturing detergent comprising at least one solvent selected from the following (a) to (j): (A) R ₁ SO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (B) (However, R ₂ is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (C) (However, R ₃ is H or an aliphatic hydrocarbon group having 1 to 4 carbon atoms,
M is Na, K, ammonium or alkanol ammonium group). (D) R ₁ OSO ₃ M (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium groups). (E) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (F) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and M is N
a, K, ammonium or alkanol ammonium group, n ₁ is an integer of ₁ to 20). (G) (However, R ₅ is an aliphatic hydrocarbon group having 2 to 20 carbon atoms, and M is N
a, K, ammonimuu or alkanol ammonium group). (H) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium group, m ₁
Is 1 or 2 and n ₂ is 1 or 2). (I) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and n ₃ is 1 to 100). (J) (However, R ₄ is an aliphatic hydrocarbon group having 6 to 18 carbon atoms, and n ₃ is 1 to 100). (K) Polyoxyethylene sorbitan alkyl or aryl ester. (L) Polyoxyethylene propylene block polymer. (M) (However, R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and m ₂ , n
₄ is an integer from 0 to 100, but m ₂ and n ₄ are not 0 at the same time). (N) R ₁ COOM (where R ₁ is an aliphatic hydrocarbon group having 8 to 20 carbon atoms, and M is
Na, K, ammonium, alkanol ammonium groups). (a) Aliphatic alcohol having 1 to 4 carbon atoms (b) Hydroxy-substituted or unsubstituted aliphatic carboxylic acid having 1 to 4 carbon atoms (c) Aliphatic ketone having 3 to 8 carbon atoms (d) 6 to 10 carbon atoms A phenolic compound (e) a cyclic ether having 4 to 6 carbon atoms (f) a cyclic ester having 4 to 6 carbon atoms (g) a halogenated hydrocarbon having 1 to 4 carbon atoms (h) an alkyl-substituted or unsubstituted formamide or Acetamide (i) N-alkyl-substituted or unsubstituted cyclic amide having 4 to 5 carbon atoms (j) Aliphatic nitrile having 2 to 4 carbon atoms 5. The cleaning agent according to claim 4, which contains at least one of the following (a ') to (j'). (a ') aliphatic alcohol having 1 to 2 carbon atoms (b') hydroxy-substituted or unsubstituted aliphatic carboxylic acid having 1 to 3 carbon atoms (c ') aliphatic ketone (d') carbon having 3 to 5 carbon atoms C6-8 phenolic compound (e ') C4 cyclic ether (f') C4 cyclic ester (g ') C1-3 chlorinated hydrocarbon (h') alkyl-substituted formamide Or acetamide (i ') C4 N-alkyl-substituted or unsubstituted cyclic amide (j') C3 aliphatic nitrile 6. The cleaning agent according to claim 5, which contains at least one of (a ') to (b'), (e ') to (h') and (i ').