JPS59129226A - Two-component molding material - Google Patents

Abstract

PURPOSE:A two-component molding material capable of forming a model or mold having a moderate hardness and excellent dimensional accuracy, comprising a base comprising a mixture of a low-viscosity epoxy resin, a filler, and calcined gypsum and an adjuvant comprising an aqueous solution of a polyamine. CONSTITUTION:A base is prepared by mixing (A) 20-70% low-viscosity epoxy resin of a viscosity, at room temperature, of below 20,000cP, with (B) below 30% medium-light weight filler (e.g., CaCO3), and (C) 70-20% calcined gypsum. Separately, an adjuvant is prepared by dissolving (D) at least one water-soluble polyamine selected from the group consisting of aliphatic polyethyleneamines, aliphatic amidepolyamines, aliphatic adduct polyamines, and heterocyclic polyamines in water. The base is then mixed with the adjuvant, and the resulting mixture is applied to a matrix having a surface coated with a mold release to form a coating layer 2, to which a gypsum slurry layer 3 is applied and cured. The cured gypsum is removed from the mold.

Description

[Detailed Description of the Invention] This invention is a general method in which the next layer and the whole are made of resin plaster.
This applies to the two-component molding materials used to manufacture the σ type and 45 type.

Conventionally, a model for the lower beam and [for the production of the Kotobuki mold, a stone handle type or 4 fat) qq have been used, but for the stone 1f type, I1 is used.
vinegar! It has the disadvantage of not having enough waves and being brittle. May = +, 1.4 Since the mold is hard, it cannot be used for repairs, and it has disadvantages such as poor accuracy. Therefore, the surface of the model mold is gel coated with epoxy resin and banked up with plaster slurry. A method has been taken. Since this method consists of completely different materials, epoxy resin and stone/rT, with different interfaces, extremely complicated measures must be taken to maintain their stability. was there.

This invention was made to solve these problems.
Composed as a mixture consisting of 1 stone, aliphatic polyethylene polyamines, or 14-group amide polyamines, adducts of 14-group amide polyamines, adducts of 14-group adducts, heterocyclic polyamines alone or in mixtures, and water. A two-component molding material is provided, in which the main agent and auxiliary agent are stored in separate containers and the main agent and auxiliary agent are mixed and applied to the surface of the model or poured into the matrix during molding. We have set 7 objectives.

As described above, in the present invention, the main ingredient and the auxiliary ingredient are separated and stored in separate containers, so it is possible to mold the mold by simply removing the two ingredients from the container and mixing them at the site. Since the curing agent for the resin and the water that promotes curing of the plaster are separated from the main ingredient and stored in separate containers, it has the advantage of being stored stably for a long period of time.

The epoxy resin that can be used as the main resin is a low viscosity epoxy resin (20,000 cps or less at room temperature).
It does not limit the type of ILM, nor does it limit the type of calcined stone, such as calcium sulfate. Full-time
The i-agent is added for stable curing and improvement of cured physical properties during mixing of two components, and is preferably a medium-light filler. Examples of ψ11 include carbonate, asbestos, Merck, and aluminum powder. The composition of the mixture is not particularly specified, but since the viscosity increases as the mixing ratio of epoxy resin and sealant decreases, it is preferable that 20 to 70% of the composition be made of epoxy resin and 70 to 70% It consists of 20 pieces of stone and oysters, and less than 30% of light and 111 agents, especially baked stone and 1! A room temperature curing type epoxy resin curing agent suitable as an adjuvant packaged separately from the main agent, characterized in that it contains f. The composition is as follows: A total of 24 I-i of the base material is mixed with water, and the composition is as follows. It is sufficient that the water content is at least 1 h or less, and polyethylene,
A two-component molding material composition characterized in that water (°δ-curved polyamines) such as polyamines is used as an aqueous solution for the main ingredient, and a model and mold 1 are manufactured using the same. provide a method to do so.

Below, practical examples of this invention will be described in detail.

17th example 1 Base material Epoxy/grease resistant...40 parts Baked stone
1f...40 copies Talli...20 copies Subi:1j
HD-3824 (hardening agent for gel coat manufactured by Hysole) 56 parts water 44
iaB The main ingredient and the auxiliary agent are stored in separate containers in the above mixing ratio.When molding the mold, a commercially available mold release agent for wood 11 is applied to the surface of the matrix 1, and the above-mentioned main agent and auxiliary agent are mixed. Mix with the agent in a ratio of 100:25 and apply it as evenly as possible with a brush or rubber spatula to a thickness of 2 mm to 20 mm, and apply it! 92 was formed, and then a gypsum slurry layer 3 consisting of calcined gypsum and water in a ratio of 100:40 was banked up to a thickness of 30 to 50 mm.

After standing at room temperature for 24 hours, the mold was demolded. The surface hardness at that time was 5bote-L') = 65, and the surface hardness of the obtained model was fixed and matched with the matrix, and the adsorption of the fat layer and the gypsum back-up layer was also very good. Ta.

ffi 2 Reallli 1st row main agent Epoxy: I'd 'IW...25 parts" Baked stone ttT...50 parts
Ruri ・・・・・・・・・ 20 parts Al
Mi powder・・・・・・・・・ 5 parts shaving HI)-382
4・・・・・・・・・28 parts water・・・・・・・・・・・・
72 parts The main ingredient and the auxiliary ingredient were housed in separate containers at the above blending ratio.

In forming the mold, as in the first example, the main agent and the auxiliary agent are thoroughly mixed in a ratio of 100:35 on the surface of the mother mold, which has been previously coated with the H-type agent. It was constructed and demolded in the same manner as in the example. The surface hardness at that time is 5hare
-D = 65, and a model with excellent bubble-free properties was obtained, similar to the first row of the first embodiment and ii+.

3rd base agent: Epoxy+Varl effect...50
Part Yakiishi ・) f・・・・・・30 parts
Rug......20 parts Adjuvant HD・3
824・・・・・・・・・ 80 parts water・・・・・・・
. . . 20 parts The main ingredient and the auxiliary ingredient were each housed in separate containers at the above blending ratio.

For molding, as in the first embodiment, the above-mentioned main material and curing agent were applied to the surface of the mold, which had been previously coated with the female molding agent.
It was mixed well at a ratio of 20 parts to 20 parts, and the mold was applied in the same manner as in the first example, and the mold was removed after 6 hours.The surface hardness at that time was Sh.
o? e −D = 75, and a very excellent model was obtained as in the first example.

4th Example Main agent Epoxy resin...50 parts)
With stone...30 parts Calcium carbonate...
・・・・・・・・・20 parts Adjuvant Tetrapolyethylenepentamine・・・・・・ 80 parts Water ・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
... 20 parts The main ingredient and the auxiliary ingredient were each housed in separate containers at the above mixing ratio.

For molding, as in the first embodiment, the main agent and sub-agent described in 1iJ are applied in 1. O
Mix well at a ratio of O to 15, and after 4 hours of construction in the same manner as in the first example (the mold was demolded twice), the table at that time [In hardness 1 琥 is 5hore -'I) = 80. , a very good model was obtained, similar to the first Eishi example.

This invention is not limited to the above blending ratio. 'f In other words, in the first embodiment, the ratio of the main agent to the auxiliary agent is 100:25, but since this is a distribution ratio, the main agent is placed in a container containing 100 λ, and the auxiliary agent is placed in a tea utensil containing 25 λ. If you leave it in place, you can obtain the appropriate mixing ratio just by mixing each container for the batter, which makes the construction process easier as there is no need for troublesome mixing and proportioning.

[Brief explanation of drawings]

FIG. 1 is a W+ side view showing the construction state of the mold according to the present invention. 1... Matrix 2... Molding material layer 3... Back-up layer Patent applicant: No Inljanokun Co., Ltd. &-(
1 Representative Patent Attorney Michibe Isono: −′・
Mi・2・)

Claims (1)

[Claims] At the time of construction, mix the main agent and auxiliary agent and apply it to a two-component molding material that is cut into shape.
Composed as a mixture consisting of baked stone and seawater, and the adjuvants are u & fat j
polyethylene amines, or amide polyamines, adduct polyamines, heterocyclic polyamines alone or in mixtures I
A two-component molding material comprising a proboscis and water, each of which is housed in a separate container.