Polyvinyl chloride auxiliary heat stabilizer and preparation method thereof

Abstract

The invention discloses a polyvinyl chloride auxiliary heat stabilizer and a preparation method thereof. The polyvinyl chloride auxiliary heat stabilizer comprises a component A, a component B and modified hydrotalcite. The polyvinyl chloride auxiliary heat stabilizer is prepared by the following steps: 1, preparing a component A and a component B; 2, preparing modified hydrotalcite; and 3, mixing the component A and the component B according to the weight ratio of 1: 1 to obtain a first component, mixing the modified hydrotalcite and stearic acid according to the mass ratio of 1: 1-3 to obtain a second component, mixing the second component and the first component according to the mass ratio of 7-9: 1 to obtain the polyvinyl chloride auxiliary heat stabilizer, and adding the modified hydrotalcite into the polyvinyl chloride synthesis process to obtain the polyvinyl chloride auxiliary heat stabilizer. In the synthesis process that the modified hydrotalcite is added topolyvinyl chloride , lamellar hydrogen bonds disappear and lamellar dissociation occurs due to dehydration, bubbles generated during preparation of a polyvinyl chloride product are reduced, and the prepared component A and component B are matched with the modified hydrotalcite to achieve an auxiliary thermal stabilization effect.

Description

technical field

[0001] The invention belongs to the technical field of preparation of plastic additives, and in particular relates to a polyvinyl chloride auxiliary heat stabilizer and a preparation method thereof. Background technique

[0002] Polyvinyl chloride has excellent corrosion resistance and high mechanical properties, and is cheap, rich in resources, and mature in manufacturing technology, so its products are widely used in various fields of industrial and agricultural production. However, because the polyvinyl chloride structure contains double bonds, branched chain structures and initiator residues, etc., it degrades with the dehydrochlorination reaction at the processing temperature, and also undergoes discoloration and macromolecular crosslinking. Therefore, heat stabilizers must be used in the processing of polyvinyl chloride. For a long time, the heat stabilizers used for PVC mainly include lead salts, composite metal soaps and organotins. Among them, lead...

Examples

Embodiment 1

[0034] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0035] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0036]The first step, preparing component A and component B;

[0037] Second step, prepare modified hydrotalcite;

[0038] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:1 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 7:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0039] Wherein, preparation component A comprises the steps:

[0040] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise whi...

Embodiment 2

[0052] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0053] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0054] The first step, preparing component A and component B;

[0055] Second step, prepare modified hydrotalcite;

[0056] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:2 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 8:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0057] Wherein, preparation component A comprises the steps:

[0058] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise wh...

Embodiment 3

[0070] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0071] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0072] The first step, preparing component A and component B;

[0073] Second step, prepare modified hydrotalcite;

[0074] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:3 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 9:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0075] Wherein, preparation component A comprises the steps:

[0076] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise wh...

technical field

[0001] The invention belongs to the technical field of preparation of plastic additives, and in particular relates to a polyvinyl chloride auxiliary heat stabilizer and a preparation method thereof. Background technique

[0002] Polyvinyl chloride has excellent corrosion resistance and high mechanical properties, and is cheap, rich in resources, and mature in manufacturing technology, so its products are widely used in various fields of industrial and agricultural production. However, because the polyvinyl chloride structure contains double bonds, branched chain structures and initiator residues, etc., it degrades with the dehydrochlorination reaction at the processing temperature, and also undergoes discoloration and macromolecular crosslinking. Therefore, heat stabilizers must be used in the processing of polyvinyl chloride. For a long time, the heat stabilizers used for PVC mainly include lead salts, composite metal soaps and organotins. Among them, lead...

Examples

Embodiment 1

[0034] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0035] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0036]The first step, preparing component A and component B;

[0037] Second step, prepare modified hydrotalcite;

[0038] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:1 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 7:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0039] Wherein, preparation component A comprises the steps:

[0040] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise whi...

Embodiment 2

[0052] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0053] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0054] The first step, preparing component A and component B;

[0055] Second step, prepare modified hydrotalcite;

[0056] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:2 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 8:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0057] Wherein, preparation component A comprises the steps:

[0058] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise wh...

Embodiment 3

[0070] A polyvinyl chloride auxiliary heat stabilizer, comprising component A, component B and modified hydrotalcite;

[0071] This polyvinyl chloride auxiliary heat stabilizer is prepared through the following steps:

[0072] The first step, preparing component A and component B;

[0073] Second step, prepare modified hydrotalcite;

[0074] The third step is to mix component A and component B according to the weight ratio of 1:1 to obtain the first component, and then to mix the modified hydrotalcite and stearic acid according to the mass ratio of 1:3 to obtain the second component. The two components and the first component are mixed according to the mass ratio of 9:1 to obtain a polyvinyl chloride auxiliary heat stabilizer.

[0075] Wherein, preparation component A comprises the steps:

[0076] Step A11, add xylene, methyl stearate and sodium methoxide into a four-necked flask, set the temperature to 140°C, and the rotation speed to 300r / min, add acetophenone dropwise wh...

Images