CN211636425U - Alkali glue feeding pot - Google Patents

Abstract

The utility model discloses an alkali glue feeding kettle, which comprises a kettle body and a kettle cover arranged on the kettle body, wherein the kettle cover is provided with a nitrogen connecting port, a feeding port and a vent hole, the kettle body is provided with a liquid level meter, and the bottom of the kettle body is provided with a discharge port; the utility model discloses not only having avoidd conventional plastics alkali and having glued the kettle in the use alkali and glue the problem that continuously contacts and air admission polymeric kettle with the air, effectively having reduced water and carbon dioxide in the air and having got into polymerization system, weakened the amine taste of silicon rubber and reduced its end hydroxyl content, made the overall process that the alkali was glued and was used contactless with the air moreover, can effectively improve the environment of production site, reduced the stimulation of amine taste to workman respiratory.

Description

Alkali glue feeding pot

Technical Field

The utility model relates to the field of chemical equipment and engineering technology, in particular to an alkali glue feeding kettle.

Background

The methyl vinyl silicone rubber is a copolymer of dimethyl siloxane chain links and methyl vinyl siloxane chain links, is prepared into rubber compound with a reinforcing agent and other auxiliary materials under certain conditions, and various silicone rubber elastic products are obtained under certain temperature and pressure conditions by using a vulcanizing agent.

At present, various domestic large methyl vinyl silicone rubber manufacturers basically adopt a kettle type semi-continuous method for production, and tetramethyl ammonium hydroxide and dimethyl siloxane mixed ring bodies are prepared into alkali rubber which is used as a catalyst. The alkali glue is prepared through an alkali glue production line, before use, the alkali glue is weighed into a plastic pot, and then poured into a funnel on a polymerization kettle to be sucked into the polymerization kettle.

The alkali glue is continuously contacted with air in the process of weighing and adding the alkali glue, part of air is sucked into the polymerization kettle in the process of adding the alkali glue, and the alkali glue is contacted with water and carbon dioxide in the air. The carbon dioxide can lead the alkali rubber to form ammonium carbonate salt, the decomposition temperature of the ammonium carbonate salt is more than 200 ℃, while the methyl vinyl silicone rubber is usually subjected to 160 ℃ low temperature removal, and the ammonium carbonate salt is remained in the silicone rubber, so that the adhesive tape has amine smell, and the strength and the high temperature resistance of the silicone rubber product can be reduced; on one hand, water hydrolyzes the catalyst and reduces the catalytic activity, and on the other hand, the water can be used as a blocking agent of the silicon rubber to block the silicon rubber terminal hydroxyl groups, and the terminal hydroxyl groups can lead the mixed rubber to be structured, thereby influencing the storage and processing performances of the silicon rubber.

Therefore, there is a need to design an alkali gel feeding pot to solve the above problems.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned not enough, provide an alkali glues feeding kettle, can weigh, add the in-process at alkali glue and avoid alkali to glue contact air, air admission polymeric kettle.

The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides an alkali glue feeding kettle, includes kettle body and the pot lid of locating on the kettle body, is equipped with nitrogen gas connector, charge door and drain on the pot lid, is equipped with the level gauge on the kettle body, is equipped with the discharge gate in kettle body bottom.

Preferably, the bottom of the kettle body is hemispherical.

Preferably, the kettle body is placed on the bracket.

Preferably, the kettle body is in threaded connection with the kettle lid.

Preferably, a kettle handle is arranged on the kettle body.

Preferably, the number of the kettle handles is two, and the two kettle handles are respectively arranged on two sides of the kettle body.

The utility model has the advantages that:

1. the problems that the alkali glue is continuously contacted with air and the air enters a polymerization kettle in the use process of the conventional plastic alkali glue pot are solved, water and carbon dioxide in the air are effectively reduced to enter a polymerization system, the amine taste of the silicon rubber is weakened, and the content of terminal hydroxyl groups of the silicon rubber is reduced;

2. the whole process of using the alkali glue is not contacted with the air, the environment of a production field can be effectively improved, and the stimulation of amine smell to the respiratory system of workers is reduced.

Drawings

FIG. 1 is a schematic view of an alkali gel feeding kettle;

in the figure, a kettle cover 1, a kettle body 2, a kettle handle 3, a bracket 4, a nitrogen connector 5, a feeding port 6, a vent port 7, a liquid level meter 8 and a discharge port 9.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in figure 1, an alkali glue feeding kettle comprises a kettle body 2 and a kettle cover 1 arranged on the kettle body 2, wherein a nitrogen connecting port 5, a feeding port 6 and a vent port 7 are arranged on the kettle cover 1, a liquid level meter 8 is arranged on the kettle body 2, and a discharging port 9 is arranged at the bottom of the kettle body 2.

Preferably, the bottom of the kettle body 2 is hemispherical. The arrangement enables discharging to be more thorough.

Preferably, the kettle body 2 is placed on the bracket 4. Such setting is convenient for placing of kettle body 2, and does not influence the ejection of compact of 2 bottom discharge gates 9 of kettle body.

Preferably, the kettle body 2 is in threaded connection with the kettle lid 1. The arrangement ensures that the kettle body 2 is more tightly connected with the kettle cover 1, and reduces the air entering the kettle body 2.

Preferably, a kettle handle 3 is arranged on the kettle body 2. The kettle body 2 is convenient to take due to the arrangement, so that the use is more convenient.

Preferably, the number of the kettle handles 3 is two, and the two handles are respectively arranged at two sides of the kettle body 2. The setting is more in line with the use habit of people and more convenient.

The working principle of the embodiment is as follows:

example 1

And introducing nitrogen into the nitrogen connector 5 of the alkali glue kettle, opening the vent port 7 of the alkali glue kettle, connecting the vent port to the washing liquid, connecting the charging port 6 of the alkali glue kettle to the bottom valve of the alkali glue kettle, opening the bottom valve of the alkali glue kettle, and closing the bottom valve of the alkali glue kettle, the charging port 6 of the alkali glue kettle, the vent port 7 of the alkali glue kettle and the nitrogen connector 5 of the alkali glue kettle after the liquid level meter 8 of the alkali glue kettle displays 4kg of alkali glue.

2800kg of octamethylcyclotetrasiloxane was dehydrated, then the temperature was raised to 110 ℃ and the mixture was charged into a polymerization reactor, and 1.3kg of tetramethyldivinyldisiloxane was added. The alkali glue kettle discharge port 9 is connected to a polymerization kettle feed inlet, the alkali glue kettle nitrogen connecting port 5 is filled with nitrogen, the alkali glue kettle discharge port 9 is opened, the alkali glue is added into the polymerization kettle, and the alkali glue kettle discharge port 9 and the nitrogen connecting port 5 are closed after the feeding is completed. After the polymerization is finished, the balance is carried out for 2h, and the dehydration is carried out under the conditions of 160 ℃ and-0.1 MPa.

The silicone rubber has a molecular weight of 62W, a volatile component of 0.9 percent and a gel index of 1.42.

Example 2

And introducing nitrogen into the nitrogen connector 5 of the alkali glue kettle, opening the vent port 7 of the alkali glue kettle, connecting the vent port to the washing liquid, connecting the charging port 6 of the alkali glue kettle to the bottom valve of the alkali glue kettle, opening the bottom valve of the alkali glue kettle, and closing the bottom valve of the alkali glue kettle, the charging port 6 of the alkali glue kettle, the vent port 7 of the alkali glue kettle and the nitrogen connector 5 of the alkali glue kettle after the liquid level meter 8 of the alkali glue kettle displays the weight of 4.1kg of alkali glue.

2800kg of octamethylcyclotetrasiloxane was dehydrated, then the temperature was raised to 110 ℃ and the mixture was charged into a polymerization reactor, and 1.2kg of tetramethyldivinyldisiloxane was added. The alkali glue kettle discharge port 9 is connected to a polymerization kettle feed inlet, the alkali glue kettle nitrogen connecting port 5 is filled with nitrogen, the alkali glue kettle discharge port 9 is opened, the alkali glue is added into the polymerization kettle, and the alkali glue kettle discharge port 9 and the nitrogen connecting port 5 are closed after the feeding is completed. After the polymerization is finished, the balance is carried out for 2h, and the dehydration is carried out under the conditions of 160 ℃ and-0.1 MPa.

The silicone rubber has a molecular weight of 64W, a volatile component of 0.95 percent and a gel index of 1.44.

Comparative example 1

4kg of alkali gum alkali is weighed by a plastic kettle.

2800kg of octamethylcyclotetrasiloxane was dehydrated, then the temperature was raised to 110 ℃ and the mixture was charged into a polymerization reactor, and 1.3kg of tetramethyldivinyldisiloxane was added. The alkali glue in the plastic pot is poured into the feeding funnel, and the alkali glue in the funnel is sucked into the polymerization kettle by negative pressure. After the polymerization is finished, the balance is carried out for 2h, and the dehydration is carried out under the conditions of 160 ℃ and-0.1 MPa.

The silicone rubber has the molecular weight of 61W, the volatile component of 0.89 percent and the gel index of 1.52.

Comparative example 2

4.1kg of alkali-gelatin alkali is weighed by a plastic kettle.

2800kg of octamethylcyclotetrasiloxane was dehydrated, then the temperature was raised to 110 ℃ and the mixture was charged into a polymerization reactor, and 1.2kg of tetramethyldivinyldisiloxane was added. The alkali glue in the plastic pot is poured into the feeding funnel, and the alkali glue in the funnel is sucked into the polymerization kettle by negative pressure. After the polymerization is finished, the balance is carried out for 2h, and the dehydration is carried out under the conditions of 161 ℃ and-0.1 MPa.

The silicone rubber has a molecular weight of 63W, a volatile component of 0.91 percent and a gel index of 1.57.

The utility model discloses compare with the plastic kettle that uses in the present silicon rubber semi-continuous method production process, can avoid getting the continuous contact of alkali glue in-process alkali glue and air, reduce and add the alkali glue in-process air admission polymeric kettle and alkali glue and contact the air, can effectively reduce the end hydroxyl content of silicon rubber and weaken the amine flavor in the silicon rubber, can also effectively improve on-the-spot environment simultaneously.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (6)

1. The utility model provides an alkali glues feeding kettle, includes kettle body (2) and locates pot lid (1) on kettle body (2), its characterized in that: the nitrogen gas connecting port (5), the feeding port (6) and the emptying port (7) are arranged on the kettle cover (1), the liquid level meter (8) is arranged on the kettle body (2), and the discharging port (9) is arranged at the bottom of the kettle body (2).

2. An alkali gel charging pot as claimed in claim 1, wherein: the bottom of the kettle body (2) is hemispherical.

3. An alkali gel charging pot as claimed in claim 1, wherein: the kettle body (2) is arranged on the bracket (4).

4. An alkali gel charging pot as claimed in claim 1, wherein: the kettle body (2) is connected with the kettle cover (1) through screw threads.

5. An alkali gel charging pot as claimed in claim 1, wherein: a kettle handle (3) is arranged on the kettle body (2).

6. An alkali gel charging pot as claimed in claim 5, wherein: the number of the kettle handles (3) is two, and the two kettle handles are respectively arranged at the two sides of the kettle body (2).

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