阅读说明：本技术 一种基于胶粘性低聚物的复合材料及其制备方法 (Composite material based on adhesive oligomer and preparation method thereof ) 是由 王琳 崔程 于 2020-06-18 设计创作，主要内容包括：本发明公开了一种基于胶粘性低聚物的复合材料,其特征在于,它包括以下重量份含量的组分：低聚物A 60-80份、乙丙共聚物B 2-8份、乙丙共聚物C 15-18份、乙丙共聚物D 5-15份、抗氧剂1-2份；所述低聚物A为是乙烯与丙烯或者丁烯的共聚物,其中,乙烯结构单元在共聚物中的质量百分含量为2％-7％,重均分子质量为13000。本发明还公开了所述基于胶粘性低聚物的复合材料的制备方法。本发明公开的基于胶粘性低聚物的复合材料粘结强度大、内聚强度高、渗透性强、热稳定性好,使用安全环保。(The invention discloses a composite material based on adhesive oligomer, which is characterized by comprising the following components in parts by weight: 60-80 parts of oligomer A, 2-8 parts of ethylene-propylene copolymer B, 15-18 parts of ethylene-propylene copolymer C, 5-15 parts of ethylene-propylene copolymer D and 1-2 parts of antioxidant; the oligomer A is a copolymer of ethylene and propylene or butylene, wherein the mass percentage of ethylene structural units in the copolymer is 2-7%, and the weight-average molecular mass is 13000. The invention also discloses a preparation method of the adhesive oligomer-based composite material. The composite material based on the adhesive oligomer disclosed by the invention is high in bonding strength, high in cohesive strength, strong in permeability, good in thermal stability, safe to use and environment-friendly.)

1. A composite material based on adhesive oligomers is characterized by comprising the following components in parts by weight: 60-80 parts of oligomer A, 2-8 parts of ethylene-propylene copolymer B, 15-18 parts of ethylene-propylene copolymer C, 5-15 parts of ethylene-propylene copolymer D and 1-2 parts of antioxidant; the oligomer A is a copolymer of ethylene and propylene or butylene, wherein the mass percentage of ethylene structural units in the copolymer is 2-7%, and the weight-average molecular mass is 13000.

2. A tacky oligomer-based composite material according to claim 1, characterised in that said ethylene-propylene copolymer B is a copolymer of propylene monomers and ethylene monomers, wherein the mass percentage of ethylene structural units in the copolymer is 13-18% and the weight average molecular mass is 500000.

3. An adhesive oligomer-based composite material according to claim 1, wherein said ethylene-propylene copolymer C is a copolymer of propylene monomer and ethylene monomer, wherein the weight percentage content of ethylene structural units in the copolymer is 18-20%, and the weight average molecular mass is 90000.

4. An adhesive oligomer-based composite material according to claim 1, wherein the ethylene-propylene copolymer D is a copolymer of propylene monomers and ethylene monomers, wherein the weight percentage content of ethylene structural units in the copolymer is 10% to 13%, and the weight average molecular weight is 75000.

5. An adhesive oligomer-based composite material according to claim 1, wherein the antioxidant is at least one of propyl gallate, antioxidant 1010 and antioxidant 168.

6. A method for preparing a tacky oligomer based composite according to any one of claims 1-5, comprising the steps of:

step S1, heating the temperature of the stirring kettle to be more than 100 ℃, adding the oligomer A and the antioxidant in three batches, and stirring for about 20min each time;

step S2, adding the ethylene-propylene copolymer B, and stirring for 20min or till the material temperature reaches 110 ℃;

step S3, adding the ethylene-propylene copolymer C, and stirring for 20min or till the material temperature reaches 110 ℃;

and step S4, adding the ethylene-propylene copolymer D, vacuumizing for 35-45min or observing the state until the ethylene-propylene copolymer D is completely molten, and discharging without bubbles to obtain the composite material based on the adhesive oligomer.

Technical Field

The invention belongs to the technical field of composite materials, and particularly relates to a composite material based on adhesive oligomer and a preparation method thereof.

Background

With the continuous innovation of industrial production technology, the rapid development of urban construction and the obvious change of global climate, the requirements of people on the indexes of air purification, water resource filtration and food sanitation and safety are rising day by day. The air purifier is a common device for realizing the index requirements, the core component of the air purifier is an air filter, and a main flow air filter in the prior art is mainly separated from a filter material by hot melt adhesive. The filter not only eliminates the damage of the traditional partition plate to damage the filter medium, but also effectively increases the filtering area, improves the filtering efficiency, and simultaneously reduces the airflow resistance, thereby reducing the energy consumption. Therefore, in modern air filters, the hot melt adhesive has a significant effect, and the quality of the hot melt adhesive directly affects the final performance of the air filter.

Most of hot melt adhesives used for the air filter at present mainly comprise EVA (ethylene vinyl acetate copolymer), and the EVE type hot melt adhesives mainly have the problems: 1. the thermal stability is poor, the high-temperature heating is easy to yellow, even carbide is generated, so that the finished filter product is unqualified, and the nozzle is blocked and stopped. 2. The smell is more pungent, EVA is sour, and the filter production workshop is generally in a closed space, so that the smell deteriorates the working environment. 3. The high and low temperature resistance is poor, namely the high and low temperature resistance range is narrow, and the application range of the product is small. However, the ideal hot melt adhesive for the filter requires high cohesive strength and strong adhesion, and can prevent the crease of the canvas from falling off; the permeability is strong; the foaming agent can be used for foaming, and the amount of glue used can be reduced on the premise of keeping the performance, so that the cost is reduced; high hardness, heat resistance, no toxicity and no odor; is suitable for bonding various materials such as: ABS, PE, Non-woven and PP. The existing hot melt adhesive can not meet the target requirements of people on good comprehensive performance and excellent environmental protection performance of high-quality hot melt adhesive. The performance of the hot melt adhesive is closely related to the types and the formulas of component resins forming the hot melt adhesive, and the composite material for preparing the hot melt adhesive, which is prepared by reasonable compatibility and material selection, is of great importance for improving the comprehensive performance of the hot melt adhesive for the filter.

The Chinese patent with the application number of 201910383178.1 discloses a filter paper hot melt adhesive for an industrial air filter and a preparation method thereof, wherein the filter paper hot melt adhesive for the industrial air filter comprises the following components in percentage by mass: 10 to 40 percent of EVA I, 5 to 25 percent of polyethylene wax, 5 to 20 percent of viscosity modifier, 5 to 20 percent of EVA II, 20 to 55 percent of petroleum resin and 1 to 5 percent of stabilizer. The filter paper hot melt adhesive disclosed by the invention has higher bonding strength, can quickly complete filter paper adhesion, has high bonding efficiency, and is very suitable for machine coating in an automatic production process. The filter paper hot melt adhesive has high purity, flows smoothly in the using process, and is not easy to block a nozzle, so that the normal production of automatic equipment is further ensured, and the production efficiency of processing enterprises is improved; however, the invention still has the defects that the EVA hot melt adhesive has poor thermal stability, high and low temperature resistance and environmental protection performance and needs to be further improved.

Therefore, the development of the composite material based on the adhesive oligomer, which has the advantages of high bonding strength, high cohesive strength, strong permeability, good thermal stability, safe and environment-friendly use, meets the market demand, has wide market value and application prospect, and plays a very important role in promoting the development of the composite material for the hot melt adhesive.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a composite material based on adhesive oligomer and a preparation method thereof, wherein the preparation method is simple and easy to implement, has high preparation effect and small dependence on equipment, and is suitable for continuous industrial production; the composite material based on the adhesive oligomer prepared by the preparation method has the advantages of high bonding strength, high cohesive strength, strong permeability, good thermal stability, safe use and environmental protection.

In order to achieve the purpose, the invention adopts the technical scheme that: a composite material based on adhesive oligomers is characterized by comprising the following components in parts by weight: 60-80 parts of oligomer A, 2-8 parts of ethylene-propylene copolymer B, 15-18 parts of ethylene-propylene copolymer C, 5-15 parts of ethylene-propylene copolymer D and 1-2 parts of antioxidant.

Preferably, the oligomer A is a copolymer of ethylene and propylene or butylene, wherein the mass percentage of the ethylene structural unit in the copolymer is 2-7%, and the weight-average molecular mass is 13000.

Preferably, the ethylene-propylene copolymer B is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 13-18%, and the weight-average molecular mass is 500000.

Preferably, the ethylene-propylene copolymer C is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 18-20%, and the weight-average molecular mass is 90000.

Preferably, the ethylene-propylene copolymer D is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 10% to 13%, and the weight-average molecular mass is 75000.

Preferably, the antioxidant is at least one of propyl gallate, antioxidant 1010 and antioxidant 168.

Another object of the present invention is to provide a method for preparing said adhesive oligomer-based composite material, characterized in that it comprises the following steps:

step S1, heating the temperature of the stirring kettle to be more than 100 ℃, adding the oligomer A and the antioxidant in three batches, and stirring for about 20min each time;

step S2, adding the ethylene-propylene copolymer B, and stirring for 20min or till the material temperature reaches 110 ℃;

step S3, adding the ethylene-propylene copolymer C, and stirring for 20min or till the material temperature reaches 110 ℃;

and step S4, adding the ethylene-propylene copolymer D, vacuumizing for 35-45min or observing the state until the ethylene-propylene copolymer D is completely molten, and discharging without bubbles to obtain the composite material based on the adhesive oligomer.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention provides a composite material based on adhesive oligomer and a preparation method thereof, wherein the preparation method is simple and easy to implement, has high preparation effect and small dependence on equipment, and is suitable for continuous industrial production; the composite material based on the adhesive oligomer prepared by the preparation method has the advantages of high bonding strength, high cohesive strength, strong permeability, good thermal stability, safe use and environmental protection.

Detailed Description

The following detailed description of preferred embodiments of the invention will be made.

A composite material based on adhesive oligomers is characterized by comprising the following components in parts by weight: 60-80 parts of oligomer A, 2-8 parts of ethylene-propylene copolymer B, 15-18 parts of ethylene-propylene copolymer C, 5-15 parts of ethylene-propylene copolymer D and 1-2 parts of antioxidant.

Preferably, the oligomer A is a copolymer of ethylene and propylene or butylene, wherein the mass percentage of the ethylene structural unit in the copolymer is 2-7%, and the weight-average molecular mass is 13000.

Preferably, the ethylene-propylene copolymer B is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 13-18%, and the weight-average molecular mass is 500000.

Preferably, the ethylene-propylene copolymer C is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 18-20%, and the weight-average molecular mass is 90000.

Preferably, the ethylene-propylene copolymer D is a copolymer of a propylene monomer and an ethylene monomer, wherein the mass percentage of the ethylene structural unit in the copolymer is 10% to 13%, and the weight-average molecular mass is 75000.

Preferably, the antioxidant is at least one of propyl gallate, antioxidant 1010 and antioxidant 168.

Another object of the present invention is to provide a method for preparing said adhesive oligomer-based composite material, characterized in that it comprises the following steps:

step S1, heating the temperature of the stirring kettle to be more than 100 ℃, adding the oligomer A and the antioxidant in three batches, and stirring for about 20min each time;

step S2, adding the ethylene-propylene copolymer B, and stirring for 20min or till the material temperature reaches 110 ℃;

step S3, adding the ethylene-propylene copolymer C, and stirring for 20min or till the material temperature reaches 110 ℃;

and step S4, adding the ethylene-propylene copolymer D, vacuumizing for 35-45min or observing the state until the ethylene-propylene copolymer D is completely molten, and discharging without bubbles to obtain the composite material based on the adhesive oligomer.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention provides a composite material based on adhesive oligomer and a preparation method thereof, wherein the preparation method is simple and easy to implement, has high preparation effect and small dependence on equipment, and is suitable for continuous industrial production; the composite material based on the adhesive oligomer prepared by the preparation method has the advantages of high bonding strength, high cohesive strength, strong permeability, good thermal stability, safe use and environmental protection.

The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto: