阅读说明：本技术 一种聚醚改性聚丙烯酸酯专用发泡树脂的制备和应用 (Preparation and application of special foaming resin for polyether modified polyacrylate ) 是由 邹威 刘蒙 张晨 马育红 曹建平 闫冬 王慧 陶明松 于 2020-12-11 设计创作，主要内容包括：本发明提供一种聚醚改性聚丙烯酸酯专用发泡树脂的制备和应用,所述聚醚改性聚丙烯酸酯专用发泡树脂包括如下重量份的原料：丙烯酸酯单体80-90重量份、聚丙二醇7.75-20重量份、丙烯酸2-8重量份、催化剂0.2-1重量份、引发剂0.05-0.2重量份。本发明的技术方案制备过程简单,具有较好的稳定性,在聚丙烯酸酯泡棉制品生产中与聚醚型有机硅匀泡剂具有良好的相容性,能得到泡孔均匀、闭孔率高的聚丙烯酸酯泡棉制品。(The invention provides preparation and application of special foaming resin for polyether modified polyacrylate, wherein the special foaming resin for polyether modified polyacrylate comprises the following raw materials in parts by weight: 80-90 parts of acrylate monomer, 7.75-20 parts of polypropylene glycol, 2-8 parts of acrylic acid, 0.2-1 part of catalyst and 0.05-0.2 part of initiator. The technical scheme of the invention has simple preparation process and better stability, has good compatibility with the polyether type organic silicon foam stabilizer in the production of polyacrylate foam cotton products, and can obtain polyacrylate foam cotton products with uniform foam holes and high closed-cell rate.)

1. The special foaming resin for polyether modified polyacrylate is characterized by comprising the following raw materials in parts by weight:

80-90 parts of acrylate monomer, 7.75-20 parts of polypropylene glycol, 2-8 parts of acrylic acid, 0.2-1 part of catalyst and 0.05-0.2 part of initiator.

2. The special foaming resin for polyether modified polyacrylate as claimed in claim 1, wherein the acrylate monomer is one or two of methyl acrylate, methyl methacrylate, butyl acrylate, glycidyl acrylate and isobornyl acrylate.

3. The special foaming resin for polyether modified polyacrylate as claimed in claim 1, wherein the catalyst is one or two of p-toluenesulfonic acid and xylenesulfonic acid.

4. The special foaming resin for polyether-modified polyacrylate as claimed in claim 1, wherein the polypropylene glycol has a relative molecular mass of 400-2000.

5. The foaming resin special for polyether-modified polyacrylate as claimed in claim 1, wherein the amount of the initiator is 0.1 weight part.

6. The preparation method of the special foaming resin for polyether modified polyacrylate is characterized by comprising the following steps:

s1: preparing a polyether precursor: reacting polypropylene glycol with acrylic acid for 1-3 h;

s2: preparing polyether modified polyacrylate: and (3) reacting the acrylate monomer, the polyether precursor and the initiator in a xylene solvent for 4-5 h.

7. The preparation method of the foaming resin special for polyether modified polyacrylate according to claim 6,

step S1, reacting polypropylene glycol with acrylic acid for 1-3h, comprising:

the polypropylene glycol and acrylic acid react for 1-3h at 55-72 ℃ under the action of a catalyst.

8. The preparation method of the foaming resin special for polyether modified polyacrylate according to claim 6,

step S2, reacting the acrylate monomer, the polyether precursor and the initiator in a xylene solvent for 4-5h, comprising:

acrylate monomer, polyether precursor and initiator are reacted in xylene solvent at 60-80 deg.c for 4-5 hr, and the xylene phase solution is separated through stilling.

9. The preparation method of the foaming resin special for polyether modified polyacrylate according to claim 6,

step S2, reacting the acrylate monomer, the polyether precursor and the initiator in a xylene solvent for 4-5h, further comprising:

standing to separate the xylene phase solution, and vacuum drying.

10. The application of the special foaming resin for polyether modified polyacrylate prepared according to any one of claims 6 to 9 is characterized in that polyether modified polyacrylate is used as a matrix, and a polyether type organic silicon foam stabilizer is added to prepare polyacrylate foam.

Technical Field

The invention relates to the technical field of high polymer materials, and particularly relates to preparation and application of a special foaming resin for polyether modified polyacrylate.

Background

The foam stabilizer is an essential assistant in the foam material. The foaming agent has the effects of uniformly mixing all raw materials in the foaming process, reducing the surface tension of a system to promote nucleation and supporting a foam body to avoid the occurrence of adverse phenomena of collapse, coarse pores, cracking and the like.

At present, no foam stabilizer specially used for polyacrylate exists, but the commercially available and most studied polysiloxane foam stabilizers are formed by connecting a hydrophilic polyether chain segment and a hydrophobic polysiloxane chain segment with greatly different performances through chemical bonds. However, the polyether type organosilicon foam stabilizer is poor in compatibility between the polyurethane foam stabilizer and polyacrylate.

Disclosure of Invention

The embodiment of the invention provides preparation and application of a special foaming resin for polyether modified polyacrylate, which are used for solving the problem of poor compatibility of a polyacrylate material and a polyether type organic silicon foam stabilizer.

In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:

the special foaming resin for polyether modified polyacrylate comprises the following raw materials in parts by weight:

80-90 parts of acrylate monomer, 7.75-20 parts of polypropylene glycol, 2-8 parts of acrylic acid, 0.2-1 part of catalyst and 0.05-0.2 part of initiator.

Optionally, the acrylate monomer is one or two of methyl acrylate, methyl methacrylate, butyl acrylate, glycidyl acrylate and isobornyl acrylate.

Optionally, the catalyst is one or two of p-toluenesulfonic acid and xylene sulfonic acid.

Optionally, the relative molecular mass of the polypropylene glycol is 400-2000.

Optionally, the initiator is 0.1 parts by weight.

The embodiment of the invention also provides a preparation method of the special foaming resin for polyether modified polyacrylate, which comprises the following steps:

s1: preparing a polyether precursor: reacting polypropylene glycol with acrylic acid for 1-3 h;

s2: preparing polyether modified polyacrylate: and (3) reacting the acrylate monomer, the polyether precursor and the initiator in a xylene solvent for 4-5 h.

Optionally, in step S1, the reacting polypropylene glycol with acrylic acid for 1 to 3 hours includes:

the polypropylene glycol and acrylic acid react for 1-3h at 55-72 ℃ under the action of a catalyst.

Optionally, in step S2, the reacting the acrylate monomer, the polyether precursor, and the initiator in a xylene solvent for 4 to 5 hours includes:

acrylate monomer, polyether precursor and initiator are reacted in xylene solvent at 60-80 deg.c for 4-5 hr, and the xylene phase solution is separated through stilling.

Optionally, in step S2, the reacting the acrylate monomer, the polyether precursor, and the initiator in a xylene solvent for 4 to 5 hours further includes:

standing to separate the xylene phase solution, and vacuum drying.

The embodiment of the invention also provides an application of the special foaming resin ester for polyether modified polyacrylate, which is prepared by adding the polyether type organic silicon foam stabilizer into polyether modified polyacrylate serving as a matrix to prepare the polyacrylate foam.

The embodiment of the invention has the following technical effects:

according to the technical scheme, the special foaming resin for the polyether modified polyacrylate has the advantages of simple preparation process and good stability, has good compatibility with the polyether type organic silicon foam stabilizer in the production of polyacrylate foam cotton products, and can obtain the acrylate foam cotton products with uniform foam holes and high closed-cell rate.

Drawings

Fig. 1 is a schematic flow chart of preparation of a special foaming resin for polyether-modified polyacrylate, provided by an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The special foaming resin for polyether modified polyacrylate comprises the following raw materials in parts by weight:

80-90 parts of acrylate monomer, 7.75-20 parts of polypropylene glycol, 2-8 parts of acrylic acid, 0.2-1 part of catalyst and 0.05-0.2 part of initiator.

In a preferred embodiment of the present invention, the acrylate monomer is one or two of methyl acrylate, methyl methacrylate, butyl acrylate, glycidyl acrylate and isobornyl acrylate.

As a preferred embodiment of the invention, the catalyst is one or two of p-toluenesulfonic acid and xylene sulfonic acid.

As a preferred embodiment of the present invention, the relative molecular mass of the polypropylene glycol is 400-2000.

As a preferred embodiment of the present invention, the initiator is 0.1 part by weight.

The embodiment of the invention also provides a preparation method of the special foaming resin ester for polyether modified polyacrylate, which comprises the following steps:

s1: preparing a polyether precursor: reacting polypropylene glycol with acrylic acid for 1-3 h;

s2: preparing polyether modified polyacrylate: and (3) reacting the acrylate monomer, the polyether precursor and the initiator in a xylene solvent for 4-5 h.

As a preferred embodiment of the present invention, step S1, the reacting polypropylene glycol with acrylic acid for 1-3h comprises:

the polypropylene glycol and acrylic acid react for 1-3h at 55-72 ℃ under the action of a catalyst.

As a preferred embodiment of the present invention, step S2, the reacting the acrylate monomer, the polyether precursor and the initiator in the xylene solvent for 4-5h includes:

acrylate monomer, polyether precursor and initiator are reacted in xylene solvent at 60-80 deg.c for 4-5 hr, and the xylene phase solution is separated through stilling.

As a preferred embodiment of the present invention, step S2, the reacting the acrylate monomer, the polyether precursor and the initiator in the xylene solvent for 4-5 hours, further comprises:

standing to separate the xylene phase solution, and vacuum drying.

According to the technical scheme, the special foaming resin for the polyether modified polyacrylate has the advantages of simple preparation process, good stability and good compatibility with the polyether type organic silicon foam stabilizer in the production of polyacrylate foam cotton products.

The embodiment of the invention also provides an application of the special foaming resin for polyether modified polyacrylate, which is prepared by adding the polyether type organic silicon foam stabilizer into polyether modified polyacrylate serving as a matrix to prepare polyacrylate foam.

The polyacrylate foam is prepared by adding a polyether type organic silicon foam stabilizer into polyether modified polyacrylate serving as a matrix and performing physical or chemical foaming.

Specifically, the technical solution of the present invention can be implemented by the following implementation modes:

example 1

80 parts of acrylate monomer, 15 parts of polypropylene glycol, 4 parts of acrylic acid, 0.8 part of catalyst and 0.2 part of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, the initiator is azobisisobutyronitrile as an example, and the acrylate monomer is methyl methacrylate as an example, wherein the molecular weight of polypropylene glycol is 400.

Preparing the special foaming resin for polyether modified polyacrylate, as shown in figure 1:

s1: stirring and reacting the polypropylene glycol, the p-toluenesulfonic acid and 7.5 parts by weight of acrylic acid at 55 ℃ for 2 hours in a three-necked bottle provided with a stirrer, a thermometer and a nitrogen introducing device to obtain a polyether precursor-polypropylene glycol diacrylate containing double bonds;

s2: under the protection of nitrogen, adding 150 parts by weight of dimethylbenzene, heating to 60 ℃, dissolving the methyl methacrylate, the polyether precursor and the azobisisobutyronitrile in the dimethylbenzene solvent, wherein the solubility of the solution is 25-40 wt%, stirring at 60-80 ℃, reacting for 5 hours while keeping the temperature, standing, separating dimethylbenzene phase solution, and drying in vacuum to obtain the polyether modified polyacrylate special-purpose foamed resin.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0910 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Example 2

90 parts by weight of acrylate monomer, 7.75 parts by weight of polypropylene glycol, 2 parts by weight of acrylic acid, 0.2 part by weight of catalyst and 0.05 part by weight of initiator; wherein, the catalyst is p-xylene sulfonic acid as an example, the initiator is dibenzoyl peroxide as an example, and the acrylate monomer is n-butyl methacrylate as an example, wherein the molecular weight of the polypropylene glycol is 1000.

Preparing special foaming resin for polyether modified polyacrylate:

s1: stirring and reacting the polypropylene glycol, the p-xylene sulfonic acid and 8.4 parts by weight of acrylic acid in a three-mouth bottle provided with a stirrer, a thermometer and a nitrogen introducing device at 60 ℃ for 1 hour to prepare a polyether precursor-polypropylene glycol diacrylate containing double bonds;

s2: under the protection of nitrogen, adding 168.8 parts by weight of dimethylbenzene, heating to 60 ℃, dissolving the n-butyl methacrylate, the polyether precursor and the dibenzoyl peroxide in the dimethylbenzene solvent, wherein the solubility of the solution is 25-40 wt%, stirring at 60-80 ℃, reacting for 4 hours while keeping the temperature, standing, separating dimethylbenzene phase solution, and drying in vacuum to obtain the polyether modified polyacrylate special-purpose foamed resin.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0913 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Example 3

85 parts of acrylate monomer, 10 parts of polypropylene glycol, 4 parts of acrylic acid, 0.9 part of catalyst and 0.1 part of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, the initiator is azodiisobutyronitrile as an example, and the acrylate monomer is methyl methacrylate as an example, wherein the molecular weight of polypropylene glycol is 2000.

Preparing special foaming resin for polyether modified polyacrylate:

s1: stirring and reacting the polypropylene glycol, the p-toluenesulfonic acid and 8 parts by weight of acrylic acid at 72 ℃ for 1h in a three-necked bottle provided with a stirrer, a thermometer and a nitrogen introducing device to obtain a polyether precursor-polypropylene glycol diacrylate containing double bonds;

s2: under the protection of nitrogen, 160 parts by weight of dimethylbenzene is added, the temperature is raised to 60 ℃, the methyl methacrylate, the polyether precursor and the azobisisobutyronitrile in parts by weight are dissolved in a xylene solvent, the solubility of the solution is 25-40 wt%, the mixture is stirred at 60-80 ℃ to react and keep warm for 4 hours, the dimethylbenzene phase solution is kept stand and separated, and the special foaming resin for polyether modified polyacrylate is obtained after vacuum drying.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0910 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Example 4

80 parts of acrylate monomer, 15 parts of polypropylene glycol, 4.5 parts of acrylic acid, 0.3 part of catalyst and 0.2 part of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, the initiator is azodiisobutyronitrile as an example, and the acrylate monomer is methyl methacrylate as an example, wherein the molecular weight of the polypropylene glycol is 1000.

Preparing special foaming resin for polyether modified polyacrylate:

s1: stirring and reacting the polypropylene glycol, the p-toluenesulfonic acid and 8.4 parts by weight of acrylic acid at 60 ℃ for 3 hours in a three-necked bottle provided with a stirrer, a thermometer and a nitrogen introducing device to obtain a polyether precursor-polypropylene glycol diacrylate containing double bonds;

s2: under the protection of nitrogen, adding 168.8 parts by weight of dimethylbenzene, heating to 60 ℃, dissolving the methyl methacrylate, the polyether precursor and the azobisisobutyronitrile in the dimethylbenzene solvent, wherein the solubility of the solution is 25-40 wt%, stirring at 60-80 ℃, reacting at the temperature for 4.5 hours while keeping the temperature, standing, separating the dimethylbenzene phase solution, and drying in vacuum to obtain the polyether modified polyacrylate special-purpose foamed resin.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0910 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Example 5

88 parts of acrylate monomer, 8 parts of polypropylene glycol, 3 parts of acrylic acid, 0.9 part of catalyst and 0.1 part of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, the initiator is azodiisobutyronitrile as an example, and the acrylate monomer is methyl methacrylate as an example, wherein the molecular weight of the polypropylene glycol is 1000.

Preparing special foaming resin for polyether modified polyacrylate:

s1: stirring and reacting the polypropylene glycol, the p-toluenesulfonic acid and 8.3 parts by weight of acrylic acid at 60 ℃ for 1h in a three-necked bottle provided with a stirrer, a thermometer and a nitrogen introducing device to obtain a double-bond-containing polyether precursor-polypropylene glycol diacrylate;

s2: under the protection of nitrogen, adding 165 parts by weight of dimethylbenzene, heating to 60 ℃, dissolving the methyl methacrylate, the polyether precursor and the azobisisobutyronitrile in the dimethylbenzene solvent, wherein the solubility of the solution is 25-40 wt%, stirring at 60-80 ℃, reacting for 4 hours while keeping the temperature, standing, separating dimethylbenzene phase solution, and drying in vacuum to obtain the polyether modified polyacrylate special-purpose foamed resin.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0910 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Example 6

83 parts of acrylate monomer, 7.85 parts of polypropylene glycol, 8 parts of acrylic acid, 1 part of catalyst and 0.15 part of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, the initiator is azodiisobutyronitrile as an example, and the acrylate monomer is methyl methacrylate as an example, wherein the molecular weight of the polypropylene glycol is 1000.

Preparing special foaming resin for polyether modified polyacrylate:

s1: stirring and reacting the polypropylene glycol, the p-toluenesulfonic acid and 7.8 parts by weight of acrylic acid at 60 ℃ for 1h in a three-necked bottle provided with a stirrer, a thermometer and a nitrogen introducing device to obtain a polyether precursor-polypropylene glycol diacrylate containing double bonds;

s2: under the protection of nitrogen, 155.6 parts by weight of dimethylbenzene is added, the temperature is raised to 60 ℃, the methyl methacrylate, the polyether precursor and the azobisisobutyronitrile in parts by weight are dissolved in a xylene solvent, the solubility of the solution is 25-40 wt%, the mixture is stirred at 60-80 ℃ to react and keep the temperature for 4 hours, the xylene phase solution is kept stand and separated, and the special foaming resin for polyether modified polyacrylate is obtained after vacuum drying.

Preparing polyacrylate foam:

1) mixing the prepared special foaming resin for the polyether modified polyacrylate with polymethyl methacrylate according to the mass ratio of 1:1, and mixing the special foaming resin with an OFX-0910 type foam stabilizer according to the ratio of 100: 1, extruding and cutting by using a miniature extruder, wherein the head temperature is 200 ℃, the screw rotation speed is 100r/min, and preparing a blend sample.

2) And (2) putting the blend sample into a high-pressure reaction kettle, injecting carbon dioxide into the reaction kettle, opening a pressure relief valve to quickly relieve pressure after 4 hours at 100 ℃ and 20MPa to obtain polyacrylate foam, and performing various analysis representations after the polyacrylate foam is placed for 24 hours to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

According to the technical scheme, the polyether chain segment is introduced into the polyacrylate main chain, so that the special polyether modified polyacrylate foaming resin with good compatibility with the polyether type organic silicon foam stabilizer is obtained, the polyether type organic silicon foam stabilizer can be attached to the surface of bubbles in the foaming process, the surface tension of solid-gas two phases is reduced, and according to W ═ gamma · delta A (wherein W is the energy required for generating new bubble nuclei, gamma is the surface tension of a liquid phase, and delta A is the change of the surface area), the low surface tension is favorable for forming more bubble nuclei under the same mixing energy. The special foaming resin for polyether modified polyacrylate prepared by the embodiment of the invention is used as a matrix for foaming, and the polyether type organic silicon foam stabilizer is matched to obtain the acrylate foam with uniform and fine foam pores, so that the special foaming resin is applied to the field of polyacrylate foam.

TABLE 1 Properties of the raw materials used in the above examples

Comparative example 1

And (3) directly putting the polymethyl methacrylate into a high-pressure reaction kettle to foam without adding a foam homogenizing agent to prepare a foaming sample. And performing various analysis and characterization to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Comparative example 2

Adding a foam stabilizer without mixing the prepared special foaming resin for polyether modified polyacrylate, and placing polymethyl methacrylate into a high-pressure reaction kettle for foaming to prepare a foaming sample. And performing various analysis and characterization to obtain the density, the average cell diameter, the cell diameter distribution and the closed cell rate of the foam.

Taking the above examples 1-3 as examples, the foaming resin special for polyether modified polyacrylate obtained in the above examples and polymethyl methacrylate were extruded and blended in a ratio of 1:1, 1 wt% of polyether type foam stabilizer was added, and foaming was performed by using supercritical carbon dioxide to obtain the density, average cell diameter, cell diameter distribution and closed cell ratio of the foamed sample, and the foaming effect was compared with the acrylic ester foaming effect of the comparative example in which no foam stabilizer was added or no foam stabilizer was added but no foaming resin special for polyether modified polyacrylate was blended.

TABLE 2 Properties and comparison of foamed resin specially for poly (ether-modified polyacrylate) used in foaming poly (methyl methacrylate)

From the data in table 2, comparing comparative example 1 and comparative example 2, it can be seen that the polyether foam stabilizer has a certain foam stabilizing effect on polyacrylate foaming, but the effect is limited, which is caused by poor compatibility of the polyether foam stabilizer with polyacrylate. In contrast to comparative examples 1 to 3 and comparative examples 1 to 2, the polymethyl methacrylate foamed sample blended with the polyether modified polyacrylate has a smaller average cell diameter and a narrower cell diameter distribution, and the closed cell ratio is significantly improved.

Therefore, the polyether modified polyacrylate special foaming resin prepared by the embodiment of the invention has better compatibility with the polyether type organic silicon foam stabilizer, effectively solves the problem of poor compatibility of the organic silicon foam stabilizer and a polyacrylate foaming system, and has good application prospect in the field of polyacrylate foam.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.