TWI471395B - Curing components, adhesive compositions and curing of thermoplastic resins Temperature method - Google Patents

Description

Curing component, adhesive composition and curing of cured thermoplastic resin Temperature method

The present invention relates to a curing component and its use, in particular to a curing component comprising stearic acid or a salt thereof, an adhesive composition comprising the curing component, and a curing temperature of the thermoplastic resin. method.

In the industry, thermoplastic resins are a widely used binder, for example, applied to amorphous refractories to combine various components of the amorphous refractory. The amorphous refractory material can be used, for example, as a plugging material for the blast furnace tap. The plugged mud material contains an adhesive composition, which is placed in a mud machine and stirred before use. The adhesive composition comprises a thermoplastic phenolic resin and a curing agent, and the curing principle of the adhesive composition is that the curing agent hexamethylenetetramine is decomposed at a temperature exceeding 60 ° C to form a formaldehyde capable of crosslinking reaction with the thermoplastic phenolic resin. The adhesive composition is cured to solidify the plug. However, during operation, the internal temperature of the machine is easily raised to over 60 ° C, which makes the hexamethylenetetramine easy to decompose, and the adhesive composition is solidified, causing the plugged material to solidify in the mud damper. Therefore, it is impossible to apply on the taphole of the blast furnace, which causes waste of the plugged mud, increase of production cost, and damage to the mud breaker.

In addition to the above problems caused by hexamethylenetetramine, when other amine-based curing agents are used in combination with a thermoplastic phenolic resin, the problem that the adhesive composition is solidified in the sludge plugging device and affects subsequent application occurs. In addition to the use of other curing agents, such as the alkoxylated melamine-formaldehyde resin proposed in U.S. Patent No. 6,046,252, the existing amine-based curing agent has not been proposed to be used in combination with a thermoplastic phenolic resin. A solution to the curing problem that arises. Therefore, in the current industry, there is still a great demand for how to solve the problem of curing of the existing amine-based curing agent in combination with a thermoplastic resin.

In view of the above problems, the inventors attempted to consider two aspects: (1) increasing the curing temperature of the adhesive composition; and (2) increasing the decomposition temperature of the existing curing agent.

Accordingly, a first object of the present invention is to provide a curing component.

Thus, the cured component of the present invention contains an amine curing agent, stearic acid or a salt thereof, and a solvent capable of dissolving stearic acid or a salt thereof. Wherein, the amine-based curing agent is contained in an amount ranging from 10 to 30% by weight based on the total weight of the cured component, and the stearic acid or a salt thereof is contained in an amount ranging from 10 to 35 wt%, and The solvent is present in an amount ranging from 50 to 70 wt%.

A second object of the present invention is to provide an adhesive composition comprising the cured component.

Thus, the adhesive composition of the present invention comprises a thermoplastic resin and The cured component is as described above.

A third object of the present invention is to provide a method for improving the curing temperature of a thermoplastic resin by using the cured component.

Accordingly, the present invention provides a method for increasing the curing temperature of a thermoplastic resin comprising providing the above-mentioned cured component, and mixing the cured component with a thermoplastic resin.

The curing component of the present invention can effectively increase the decomposition temperature of the amine curing agent by using stearic acid or a salt thereof and a solvent capable of dissolving stearic acid or a salt thereof, so that the adhesive composition obtained by the subsequent application can be cured and cured. temperature. Therefore, the plugging material containing the adhesive composition does not solidify in the mud damper, and can be smoothly applied for subsequent operations, and can also avoid problems such as damage to the mud damper and waste of the mud material.

The cured component of the present invention contains an amine curing agent, stearic acid or a salt thereof, and a solvent capable of dissolving stearic acid or a salt thereof. Wherein, the amine-based curing agent is contained in an amount ranging from 10 to 30% by weight based on the total weight of the cured component, and the stearic acid or a salt thereof is contained in an amount ranging from 10 to 35 wt%, and The solvent is present in an amount ranging from 50 to 70 wt%.

Preferably, the amine-based curing agent is contained in an amount ranging from 12 to 18% by weight based on the total weight of the cured component, and the stearic acid or a salt thereof is contained in an amount ranging from 23 to 25 wt%. And the content of the solvent ranges from 59 to 63 wt%.

Preferably, the amine curing agent is hexamethylenetetramine or alkoxylated melamine-formaldehyde resin.

Preferably, the stearate is selected from the group consisting of magnesium stearate, sodium stearate, zinc stearate, calcium stearate or a combination of the foregoing.

Preferably, the solvent capable of dissolving stearic acid or a salt thereof has a boiling point in the range of 100 to 200 °C. Preferably, the solvent capable of dissolving stearic acid or a salt thereof is selected from the group consisting of xylene, dimethyl hydrazine, amyl acetate, toluene or a combination thereof. More preferably, the solvent capable of dissolving stearic acid or a salt thereof is selected from the group consisting of xylene, dimethyl hydrazine or a combination of the above. Still more preferably, the solvent capable of dissolving stearic acid or a salt thereof is dimethyl hydrazine.

The adhesive composition of the present invention comprises a thermoplastic resin and the above-mentioned cured component.

Preferably, the curing component is used in an amount ranging from 20 to 50 parts by weight based on 100 parts by weight of the total of the thermoplastic resin.

More preferably, the curing component is used in an amount ranging from 34 to 48 parts by weight based on 100 parts by weight of the total of the thermoplastic resin.

Preferably, the thermoplastic resin is a thermoplastic phenolic resin.

The method of the present invention for increasing the curing temperature of a thermoplastic resin comprises providing a curing component as described above; and mixing the curing component with a thermoplastic resin.

Preferably, the curing component is used in an amount ranging from 20 to 50 parts by weight based on 100 parts by weight of the total of the thermoplastic resin.

More preferably, the curing component is used in an amount ranging from 34 to 48 parts by weight based on 100 parts by weight of the total of the thermoplastic resin.

Preferably, the thermoplastic resin is a thermoplastic phenolic resin.

The invention is further described in the following examples, but it should be understood that this embodiment is intended to be illustrative only and not to be construed as limiting.

<Example>

[Preparation Example 1] Preparation of solidified component

According to the composition and the proportion shown in Table 1, 7.5 wt% of hexamethylenetetramine, 23.5 wt% of stearic acid, and 59 wt% of dimethylammonium were taken. The cured component of Preparation Example 1 was obtained by uniformly mixing the above components.

[Preparation Examples 2 to 7 and Comparative Preparation Examples 1 to 5] Preparation of Curing Components

The curing compositions of Preparation Examples 2 to 7 and Comparative Preparation Examples 1 to 5 were prepared in the same manner as in Preparation Preparation 1, except for the types and amounts of the respective components, wherein the types and amounts of the respective components were determined by Table 1 shows.

[Example 1] Preparation of adhesive composition

According to the composition and the amount ratio shown in Table 2, 34 parts by weight of the cured component of Preparation Example 1 was mixed with the thermoplastic phenol resin in a total weight of the thermoplastic phenol resin, and the adhesive composition of Example 1 was obtained. Things.

[Examples 2 to 7 and Comparative Examples 1 to 5] Preparation of Adhesive Composition

The adhesive compositions of Examples 2 to 7 and Comparative Examples 1 to 5 were prepared in the same manner as in Production Example 1, except that the components were The types and amounts of the components, wherein the types and amounts of the components are shown in Table 2.

[Curing temperature test]

To facilitate the description of the measurement process, the following description will be made with reference to Embodiment 1, and the remaining embodiments and comparative examples are measured in accordance with this mode. The results obtained are shown in Table 2.

The adhesive composition of Example 1 was placed in an oven at 50 ° C for heating, and after heating for 1 hour, the stirring was taken out, and it was confirmed that hexamethylenetetramine was uniformly dissolved in the thermoplastic phenol resin, and the adhesive composition of Example 1 was placed in an oven for heating. The temperature at which the adhesive composition of Example 1 was cured was measured by heating at 10 ° C for 1 hour.

From the results of Table 2, it can be seen that Examples 1 to 7 can increase the decomposition temperature of the amine-based curing agent by using stearic acid and a solvent capable of dissolving stearic acid or a salt thereof, thereby increasing the adhesive composition to 70 ° C to 120. Gel at °C. Comparative Examples 1 to 5 were produced at 60 ° C because they did not contain an amine curing agent, stearic acid or a salt thereof, and a solvent capable of dissolving stearic acid or a salt thereof. Biogelation phenomenon.

In summary, the curing component of the present invention can effectively increase the decomposition temperature of the amine curing agent by using stearic acid or a salt thereof and a solvent capable of dissolving stearic acid or a salt thereof, and can be obtained by subsequent application. The adhesive composition increases the curing temperature. Therefore, when the adhesive composition is applied to the blast furnace to block the mud material, the plasticity of the plugged mud material during the preparation of the mud and the application temperature in the mud plugging machine can be improved due to the improvement of the curing temperature, and the mud block is prevented from being muddy. Cured inside the machine.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

Claims (10)

A curing component comprising: an amine curing agent; stearic acid or a salt thereof; and a solvent capable of dissolving stearic acid or a salt thereof; wherein the amine is 100 wt% based on the total weight of the solidified component The content of the curing agent is in the range of 10 to 30% by weight, the content of the stearic acid or a salt thereof is in the range of 10 to 35 wt%, and the content of the solvent is in the range of 50 to 70% by weight. The curing component according to claim 1, wherein the solvent capable of dissolving stearic acid or a salt thereof has a boiling point in the range of 100 to 200 °C. The curing component according to claim 2, wherein the solvent capable of dissolving stearic acid or a salt thereof is selected from the group consisting of xylene, dimethyl hydrazine, amyl acetate, toluene or a combination thereof. The curing component according to claim 1, wherein the amine curing agent is hexamethylenetetramine or alkoxylated melamine-formaldehyde resin. The curing component according to claim 1, wherein the stearate is selected from the group consisting of magnesium stearate, zinc stearate, calcium stearate, sodium stearate or a combination thereof. An adhesive composition comprising a thermoplastic resin and the cured component according to any one of claims 1 to 5. The adhesive composition according to claim 6, wherein the thermoplastic resin is a thermoplastic phenol resin. The adhesive composition according to claim 6, wherein the thermoplastic resin is The total weight is 100 parts by weight, and the curing component is used in an amount ranging from 20 to 50 parts by weight. A method of raising a curing temperature of a thermoplastic resin, comprising: providing a curing component according to any one of claims 1 to 5; and mixing the curing component with a thermoplastic resin. The method according to claim 9, wherein the curing component is used in an amount ranging from 20 to 50 parts by weight based on 100 parts by weight of the total weight of the thermoplastic resin.