阅读说明：本技术 一种用于pvc发泡材料的低温发泡助剂及其应用 (Low-temperature foaming auxiliary agent for PVC (polyvinyl chloride) foaming material and application thereof ) 是由 沈平 林泽洪 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种用于PVC发泡材料的低温发泡助剂,按重量份数计算,包括以下成分：氯酸钾160～190份、硼砂80～100份、ESO增塑剂450～540份、氧化锌340～430份、碳酸氢钠90～110份、钛酸酯偶联剂35～45份。本发明的低温发泡助剂可以有效降低AC发泡剂的分解温度,应用在制备PVC发泡材料中可以有效避免PVC应发泡温度过高导致的局部损坏,与AC发泡剂搭配使用可以降低PVC发泡材料的密度,减少原料的使用,降低企业的生产成本。(The invention discloses a low-temperature foaming auxiliary agent for a PVC (polyvinyl chloride) foaming material, which comprises the following components in parts by weight: 160-190 parts of potassium chlorate, 80-100 parts of borax, 450-540 parts of ESO plasticizer, 340-430 parts of zinc oxide, 90-110 parts of sodium bicarbonate and 35-45 parts of titanate coupling agent. The low-temperature foaming auxiliary agent can effectively reduce the decomposition temperature of the AC foaming agent, can effectively avoid local damage caused by overhigh foaming temperature of PVC when being applied to the preparation of PVC foaming materials, can reduce the density of the PVC foaming materials by matching with the AC foaming agent, reduces the use of raw materials and reduces the production cost of enterprises.)

1. The low-temperature foaming auxiliary agent is characterized by comprising the following components in parts by weight: 160-190 parts of potassium chlorate, 80-100 parts of borax, 450-540 parts of ESO plasticizer, 340-430 parts of zinc oxide, 90-110 parts of sodium bicarbonate and 35-45 parts of titanate coupling agent.

2. The low-temperature foaming aid according to claim 1, comprising the following components in parts by weight: 175 parts of potassium chlorate, 100 parts of borax, 500 parts of ESO plasticizer, 400 parts of zinc oxide, 100 parts of sodium bicarbonate and 40 parts of titanate coupling agent.

3. The low-temperature foaming aid according to claim 1, wherein the ESO plasticizer has an acidity of < 0.5 and an epoxy value of > 6.

4. The low-temperature foaming aid according to claim 1, wherein the zinc oxide is nano zinc oxide.

5. The low temperature blowing aid of claim 1 wherein the titanate coupling agent is a liquid monoalkyl titanate coupling agent.

6. The method for preparing a low-temperature foaming aid according to any one of claims 1 to 5, comprising the steps of:

s001, mixing 160-190 parts of potassium chlorate, 80-100 parts of borax and 180-210 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature, and the grinding time is 6-6.5 hours;

s003, adding 90-110 parts of sodium bicarbonate, 340-430 parts of zinc oxide, 35-45 parts of titanate coupling agent and 270-330 parts of ESO plasticizer, and finely grinding at normal temperature for 6-6.5 hours to obtain a micro powder product.

7. The method for preparing a low-temperature foaming aid according to claim 6, wherein the fineness of the material after primary grinding is less than 30 μm; after fine grinding, the fineness of the material is less than 15 mu m.

8. The PVC foam material is characterized by comprising the following components in parts by weight: 3-6 parts of low-temperature foaming auxiliary agent, 3-6 parts of AC foaming agent, 2-3 parts of heat stabilizer, 40-50 parts of PVC resin powder, 2-3 parts of silicon dioxide and 30-40 parts of DOP plasticizer as described in any one of claims 1-5.

9. The PVC foam according to claim 8, characterized in that said silica is nanosilica.

10. The PVC foam material according to claim 8, wherein the heat stabilizer is a barium-zinc heat stabilizer.

Technical Field

The invention relates to the field of plastic preparation, and particularly relates to a low-temperature foaming auxiliary agent and application thereof.

Background

The foaming material is a material containing a large number of gaps, and is characterized by light weight, small density, large specific area and excellent mechanical property. The polyvinyl chloride (PVC) foaming material is a novel material which is developed quickly and applied widely at present, such as PVC foaming floors, PVC foaming artificial leather, PVC foaming wallpaper and the like. The general PVC foaming material is produced by using resin as a main raw material, adding other auxiliary agents and then carrying out a coating process or a calendaring, extruding or extruding process.

Foaming agents, which can be classified into physical foaming agents and chemical foaming agents according to the source of generated gas, can be prepared without leaving any foaming agent. Among them, chemical blowing agents are currently most widely used. The AC foaming agent is a foaming agent commonly used in plastic foaming, and has the advantages of narrow decomposition temperature, high dispersibility, high air release speed and the like, but for PVC, the decomposition temperature of the AC foaming agent is too high and the decomposition speed is too high, so that the internal temperature of PVC is too high, PVC foam is locally easy to damage and even scorch, and in addition, because the air release speed of the foaming agent is too high, a large amount of gas generated instantly can cause PVC foam holes to collapse or merge, so that the quality of a PVC foaming material is seriously reduced.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a low-temperature foaming auxiliary agent, and aims to solve the problems of overhigh foaming temperature and overhigh air release speed of an AC foaming agent in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the low-temperature foaming auxiliary agent comprises the following components in parts by weight: 160-190 parts of potassium chlorate, 80-100 parts of borax, 450-540 parts of ESO plasticizer, 340-430 parts of zinc oxide, 90-110 parts of sodium bicarbonate and 35-45 parts of titanate coupling agent.

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 175 parts of potassium chlorate, 100 parts of borax, 500 parts of ESO plasticizer, 400 parts of zinc oxide, 100 parts of sodium bicarbonate and 40 parts of titanate coupling agent.

The acidity of the ESO plasticizer is less than 0.5, and the epoxy value is more than 6.

The low-temperature foaming auxiliary agent is characterized in that the zinc oxide is nano zinc oxide.

The low-temperature foaming auxiliary agent is characterized in that the titanate coupling agent is a liquid monoalkyl titanate coupling agent.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 160-190 parts of potassium chlorate, 80-100 parts of borax and 180-210 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature, and the grinding time is 6-6.5 hours;

s003, adding 90-110 parts of sodium bicarbonate, 340-430 parts of zinc oxide, 35-45 parts of titanate coupling agent and 270-330 parts of ESO plasticizer, and finely grinding at normal temperature for 6-6.5 hours to obtain a micro powder product.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps of grinding the raw materials to ensure that the fineness of the raw materials is less than 30 mu m; after fine grinding, the fineness of the material is less than 15 mu m.

The PVC foam material comprises the following components in parts by weight: 3-6 parts of the low-temperature foaming auxiliary agent, 3-6 parts of an AC foaming agent, 2-3 parts of a heat stabilizer, 40-50 parts of PVC resin powder, 2-3 parts of silicon dioxide and 30-40 parts of a DOP plasticizer.

The PVC foaming material is characterized in that the silicon dioxide is nano silicon dioxide.

The PVC foaming material is characterized in that the heat stabilizer is a barium-zinc heat stabilizer.

Has the advantages that:

the invention provides a low-temperature foaming auxiliary agent, wherein the gas production amount of sodium bicarbonate is less, the decomposition temperature is low, the auxiliary agent serving as a foaming agent is matched with an AC foaming agent for use, heat can be absorbed firstly for decomposition, the foaming process can be better transited, the use of the AC foaming agent can be reduced, and the damage of foam holes caused by the too fast gas production of the AC foaming agent is avoided. In addition, the zinc oxide can effectively reduce the foaming temperature, and can effectively avoid the problems of poor forming and low quality of the foaming material caused by overhigh foaming temperature of the PVC. In addition, the low-temperature foaming auxiliary agent provided by the invention can effectively improve the foaming efficiency of the AC foaming agent under a low-temperature condition, can improve the quality of a PVC foaming material, and is also beneficial to reducing energy consumption of enterprises.

Detailed Description

The invention provides a low-temperature foaming auxiliary agent and a PVC foaming material, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 160-190 parts of potassium chlorate, 80-100 parts of borax, 450-540 parts of ESO plasticizer, 340-430 parts of zinc oxide, 90-110 parts of sodium bicarbonate and 35-45 parts of titanate coupling agent. Potassium chlorate can promote the foaming action. The borax is used as a combustion improver, so that the fire resistance, flame retardance and smoke suppression performance of the PVC foam material can be obviously improved, and the use safety of the PVC foam material can be improved. The ESO plasticizer can improve the weather resistance and yellowing resistance of the PVC foam material, and can also improve the softness of the foamed PVC material. The zinc oxide can effectively reduce the foaming temperature of the foaming agent, avoid the too high foaming temperature, and simultaneously improve the foaming temperature of the sodium bicarbonate, so that the decomposition temperature ranges of the low-temperature decomposed sodium bicarbonate and the high-temperature decomposed foaming agent are partially overlapped, the decomposition range is reduced, and the controllability is improved. The method is characterized in that sodium bicarbonate is decomposed at 50-80 ℃ to generate carbon dioxide gas, the sodium bicarbonate is used as a foaming auxiliary agent component to reduce the using amount of a foaming agent, the gas production amount of the sodium bicarbonate is low, the sodium bicarbonate is matched with zinc oxide for use, the sodium bicarbonate performs an endothermic reaction and decomposes to produce gas during foaming, the sodium bicarbonate can be smoothly transited to the foaming agent for decomposition after decomposition is finished, the PVC foaming material is uniformly formed, and the collapse of foam holes due to sudden excessive gas production is avoided. The titanate coupling agent can increase the wear resistance and the ageing resistance of the PVC foaming material and can reduce the usage amount of PVC resin.

Preferably, the low-temperature foaming auxiliary agent comprises the following components in parts by weight: 175 parts of potassium chlorate, 100 parts of borax, 500 parts of ESO plasticizer, 400 parts of zinc oxide, 100 parts of sodium bicarbonate and 40 parts of titanate coupling agent.

Preferably, the acidity of the ESO plasticizer is less than 0.5, the epoxy value is more than 6, the aging resistance effect is stronger, and the compatibility with PVC is better.

Preferably, the zinc oxide is nano zinc oxide. The nano zinc oxide has stronger activation effect on the AC foaming agent, can improve the decomposition rate of the AC foaming agent at low temperature, and can effectively slow down the decomposition of the AC foaming agent at high temperature, so that the AC foaming agent is more suitable for PVC foaming. In addition, the nanometer zinc oxide can enable the integral decomposition of the AC foaming agent to be more complete, the utilization rate of the AC foaming agent can be improved, the use of the AC foaming agent can be reduced, and the production cost is reduced.

Preferably, the titanate coupling agent is a liquid monoalkyl titanate coupling agent. The monoalkyl titanate coupling agent can generate chemical combination on the interface of inorganic powder and matrix resin, so that a monomolecular film is formed on the surface of PVC powder, and the filler can be activated, thereby improving the utilization rate, reducing the resin consumption and lowering the product cost.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 160-190 parts of potassium chlorate, 80-100 parts of borax and 180-210 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature, and the grinding time is 6-6.5 hours;

s003, adding 90-110 parts of sodium bicarbonate, 340-430 parts of zinc oxide, 35-45 parts of titanate coupling agent and 270-330 parts of ESO plasticizer, and finely grinding at normal temperature for 6-6.5 hours to obtain a micro powder product.

Further, the fineness of the material is less than 30 mu m after primary grinding; after fine grinding, the fineness of the material is less than 15 mu m. The fineness of the materials is smaller, the reaction is more sufficient, and the reaction efficiency is higher.

The PVC foam material comprises the following components in parts by weight: 3-6 parts of the low-temperature foaming auxiliary agent, 3-6 parts of an AC foaming agent, 2-3 parts of a heat stabilizer, 40-50 parts of PVC resin powder, 2-3 parts of silicon dioxide and 30-40 parts of a DOP plasticizer. The low-temperature foaming auxiliary agent disclosed by the invention is matched with the AC foaming agent for use, so that the AC foaming agent can be slowly decomposed at a low temperature, the PVC resin powder can be fully activated, the use of a plasticizer is reduced, and the prepared PVC foaming material is good in cell uniformity. The consumption of the foaming agent has direct influence on the performance of the foaming material, and the total amount of gas generated at the same temperature is increased along with the increase of the consumption of the foaming agent, so that the cells are enlarged, and the density of the material is reduced; if the cells are too large, the cell walls will be too thin, resulting in a decrease in mechanical properties. The low-temperature foaming auxiliary agent and the AC foaming agent are moderate in dosage, especially the dosage of the AC foaming agent can be reduced by adding the low-temperature foaming auxiliary agent, and meanwhile, the foaming process can be carried out in stages, the decomposition of the sodium bicarbonate is carried out firstly, and then the decomposition of the AC foaming agent is carried out, so that excessive gas generation at the same temperature is avoided. The DOP plasticizer has a softening effect and can improve the plastic deformation capacity of the PVC foam material.

Further, the silicon dioxide is nano silicon dioxide. The nano silicon dioxide can change the density and mechanical property of the foaming material, has better dispersity in the system and large specific surface area, plays a role of a foam cell nucleating agent, ensures that bubbles are uniformly dispersed, and reduces the density of the foaming material.

Further, the heat stabilizer is a barium-zinc heat stabilizer. The barium-zinc heat stabilizer can play a role in delaying the initial degradation of PVC and improving the initial thermal stability of PVC.

Example 1

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 175 parts of potassium chlorate, 100 parts of borax, 500 parts of ESO plasticizer, 400 parts of zinc oxide, 100 parts of sodium bicarbonate and 40 parts of titanate coupling agent.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 175 parts of potassium chlorate, 100 parts of borax and 200 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature for 6 hours;

s003, adding 100 parts of sodium bicarbonate, 400 parts of zinc oxide, 40 parts of titanate coupling agent and 300 parts of ESO plasticizer, finely grinding at normal temperature for 6.5 hours, and performing fineness inspection to ensure that the fineness of the material is less than 15 mu m after fine grinding to obtain a micro powder product.

Example 2

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 160 parts of potassium chlorate, 80 parts of borax, 450 parts of ESO plasticizer, 340 parts of nano zinc oxide, 90 parts of sodium bicarbonate and 35 parts of titanate coupling agent.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 160 parts of potassium chlorate, 80 parts of borax and 180 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature, and the grinding time is 6.5 hours;

s003, adding 90 parts of sodium bicarbonate, 340 parts of nano zinc oxide, 35 parts of titanate coupling agent and 270 parts of ESO plasticizer, finely grinding at normal temperature for 6 hours, and performing fineness inspection to ensure that the fineness of the material is less than 15 mu m after fine grinding to obtain a micro powder product.

Example 3

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 170 parts of potassium chlorate, 90 parts of borax, 490 parts of ESO plasticizer, 410 parts of zinc oxide, 100 parts of sodium bicarbonate and 40 parts of titanate coupling agent.

The titanate coupling agent is a liquid monoalkyl titanate coupling agent.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 170 parts of potassium chlorate, 90 parts of borax and 200 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature, and the grinding time is 6.5 hours;

s003, adding 100 parts of sodium bicarbonate, 410 parts of zinc oxide, 40 parts of titanate coupling agent and 290 parts of ESO plasticizer, finely grinding at normal temperature for 6.5 hours, and performing fineness inspection to ensure that the fineness of the material is less than 15 mu m after fine grinding to obtain a micro powder product.

Example 4

The low-temperature foaming auxiliary agent comprises the following components in parts by weight: 190 parts of potassium chlorate, 100 parts of borax, 540 parts of ESO plasticizer, 430 parts of zinc oxide, 110 parts of sodium bicarbonate and 45 parts of titanate coupling agent.

The preparation method of the low-temperature foaming auxiliary agent comprises the following steps:

s001, mixing 190 parts of potassium chlorate, 100 parts of borax and 210 parts of ESO plasticizer, and soaking for 1 hour;

s002, primary grinding is carried out at normal temperature for 6 hours;

s003, adding 110 parts of sodium bicarbonate, 430 parts of zinc oxide, 45 parts of titanate coupling agent and 330 parts of ESO plasticizer, finely grinding at normal temperature for 6.5 hours, and performing fineness inspection to ensure that the fineness of the material is less than 15 mu m after fine grinding to obtain a micro powder product.

Example 5

The PVC foam material comprises the following components in parts by weight: 4 parts of low-temperature foaming auxiliary agent prepared in example 1, 5 parts of AC foaming agent, 3 parts of heat stabilizer, 50 parts of PVC resin powder, 3 parts of silicon dioxide and 30 parts of DOP plasticizer.

The preparation method of the PVC foaming material comprises the following steps:

firstly, kneading PVC resin powder, silicon dioxide, a heat stabilizer and a DOP plasticizer through a kneading pot to obtain foam layer mixed powder; then banburying the foam layer mixed powder, the AC foaming agent and the low-temperature foaming auxiliary agent; then open milling, extruding and rolling to obtain a foam layer semi-finished product; and (3) foaming the semi-finished product in a foaming furnace at 180 ℃ for 2min to obtain the PVC foaming material.

Example 6

The PVC foam material comprises the following components in parts by weight: 3 parts of low-temperature foaming auxiliary agent prepared in example 2, 6 parts of AC foaming agent, 2 parts of heat stabilizer, 45 parts of PVC resin powder, 2 parts of nano silicon dioxide and 40 parts of DOP plasticizer.

The preparation method of the PVC foaming material comprises the following steps:

firstly, kneading PVC resin powder, nano silicon dioxide, a heat stabilizer and a DOP plasticizer through a kneading pot to obtain foam layer mixed powder; then banburying the foam layer mixed powder, the AC foaming agent and the low-temperature foaming auxiliary agent; then open milling, extruding and rolling to obtain a foam layer semi-finished product; and (3) placing the semi-finished product into a foaming furnace at the temperature of 171 ℃ for foaming for 2.5min to obtain the PVC foaming material.

Example 7

The PVC foam material comprises the following components in parts by weight: 6 parts of low-temperature foaming auxiliary agent prepared in example 3, 3 parts of AC foaming agent, 3 parts of heat stabilizer, 40 parts of PVC resin powder, 3 parts of nano silicon dioxide and 36 parts of DOP plasticizer.

The preparation method of the PVC foaming material comprises the following steps:

firstly, kneading PVC resin powder, nano silicon dioxide, a heat stabilizer and a DOP plasticizer through a kneading pot to obtain foam layer mixed powder; then banburying the foam layer mixed powder, the AC foaming agent and the low-temperature foaming auxiliary agent; then open milling, extruding and rolling to obtain a foam layer semi-finished product; and (3) placing the semi-finished product into a foaming furnace at 175 ℃ for foaming for 3min to obtain the PVC foaming material.

Example 8

The PVC foam material comprises the following components in parts by weight: 5 parts of low-temperature foaming auxiliary agent prepared in example 4, 5 parts of AC foaming agent, 3 parts of heat stabilizer, 48 parts of PVC resin powder, 2 parts of silicon dioxide and 33 parts of DOP plasticizer.

The preparation method of the PVC foaming material comprises the following steps:

firstly, kneading PVC resin powder, silicon dioxide, a heat stabilizer and a DOP plasticizer through a kneading pot to obtain foam layer mixed powder; then banburying the foam layer mixed powder, the AC foaming agent and the low-temperature foaming auxiliary agent; then open milling, extruding and rolling to obtain a foam layer semi-finished product; and (3) placing the semi-finished product into a foaming furnace at 170 ℃ for foaming for 2min to obtain the PVC foaming material.

In the above embodiments 5 to 8, after the low-temperature foaming auxiliary agent of the present invention is added, the foaming temperature of the whole system is reduced from 195 ℃ to 170 ℃ to 180 ℃, so that the problem that the PVC foam is locally easily damaged or even scorched due to too high foaming temperature can be effectively avoided, and the prepared PVC foam material has uniform cells and no cell merging or scorching problem. In addition, the low-temperature foaming auxiliary agent improves the decomposition and utilization efficiency of the AC foaming agent, reduces the using amount of the AC foaming agent, and can greatly reduce the production cost of enterprises.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.