阅读说明：本技术 聚丙烯增强增韧阻燃添加剂及其制备方法 (Polypropylene reinforced toughened flame-retardant additive and preparation method thereof ) 是由 顾法明 李正中 吴旭忠 匡文荣 于 2019-11-07 设计创作，主要内容包括：本发明公开了聚丙烯增强增韧阻燃添加剂,包括以下重量份数的组分：主抗氧剂15～30份,辅抗氧剂15～30份,改性剂为40～60份,金属皂盐2.5～10份。本发明利用共混改性能有效改善其性能上的不足,利用不同抗氧剂的综合使用产生协同效应达到抗氧性、耐候性,优选改性滑石粉及硬脂酸钙酸钙与聚丙烯的亲和性和相容性,增强增韧性效果明显。(The invention discloses a polypropylene reinforced toughened flame retardant additive, which comprises the following components in parts by weight: 15-30 parts of a main antioxidant, 15-30 parts of an auxiliary antioxidant, 40-60 parts of a modifier and 2.5-10 parts of metal soap salt. The invention utilizes blending modification to effectively improve the performance deficiency, utilizes the comprehensive use of different antioxidants to generate synergistic effect to achieve the oxygen resistance and weather resistance, preferably selects the affinity and compatibility of the modified talcum powder and calcium stearate with polypropylene, and has obvious effect of enhancing toughness.)

1. The polypropylene reinforced and toughened flame retardant additive is characterized by comprising the following components in parts by weight: 15-30 parts of a main antioxidant, 15-30 parts of an auxiliary antioxidant, 40-60 parts of a modifier and 2.5-10 parts of metal soap salt.

2. The polypropylene reinforcing and toughening additive as claimed in claim 1, wherein the primary antioxidant is a hindered phenol pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].

3. The polypropylene reinforcing and toughening additive as claimed in claim 1, wherein the auxiliary antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.

4. The polypropylene reinforcing and toughening flame retardant additive of claim 1, wherein the modifier is talc.

5. The polypropylene reinforcing and toughening flame retardant additive of claim 1, wherein the metal soap salt is calcium stearate.

6. The method for preparing the polypropylene reinforced toughened flame-retardant additive is characterized in that materials in a formula amount are put into a mixer to be mixed for 30-40 minutes, then the materials enter an intermediate bin, then enter a granulator from the intermediate bin to be extruded into particles for forming, then the particles are sieved and graded, enter a finished product bin and then are packaged to obtain the product.

Technical Field

The invention belongs to the field of petrochemical industry, and particularly relates to a polypropylene reinforcing, toughening and flame-retardant additive and a preparation method thereof.

Background

With the rapid development of industry and agriculture, the material demand of various industries of national economy is greatly accelerated, which not only expresses the demand but also expresses the performance demand. That is, as the quality of various products is improved, the performance requirements of the materials used are also improved. The plastic industry in China is continuously and rapidly developed, the consumption of the synthetic resin is second to that of the synthetic resin in the United states, and the synthetic resin and plastic industry are rapidly developed. The polypropylene is one of five general-purpose plastics, and compared with other general-purpose thermoplastics, the polypropylene has the advantages of small plastic density, excellent mechanical property, easy processing and low price. Therefore, the method is widely applied to the fields of machinery, chemical engineering, electric power, transportation and the like. The polypropylene has the biggest defects of poor cold resistance, low-temperature brittleness, insufficient strength, easy generation of distortion deformation, insufficient toughness and easy combustion, only 17.5 of oxygen index, almost 0 char yield, low melting, poor low-temperature toughness, large molding shrinkage, low notch impact strength and the like. In order to improve the performance deficiency, the plastic additive is required to realize the integrated comprehensive performance of oxygen resistance, stability, aging resistance, toughness, flame retardance and the like in function.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provide a polypropylene reinforcing, toughening and flame-retardant additive.

The invention also aims to provide a preparation method of the polypropylene reinforcing, toughening and flame-retardant additive.

The technical scheme is as follows: in order to achieve the above object, the present invention is specifically realized as follows: the polypropylene reinforced and toughened flame retardant additive comprises the following components in parts by weight: 15-30 parts of a main antioxidant, 15-30 parts of an auxiliary antioxidant, 40-60 parts of a modifier and 2.5-10 parts of metal soap salt.

Wherein the main antioxidant is hindered phenol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester. It is non-volatile, non-pollution, non-toxic, heat-resisting, and can save cost by using it in conjunction with auxiliary antioxidant.

Wherein the auxiliary antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. It has no pollution and no color change, has good thermal stability, and can be used with various additives without producing antagonistic effect.

Wherein the modifier is talcum powder. The treated resin can be uniformly dispersed in the resin, so that the resin can absorb part of impact energy when being impacted, and the impact performance is improved to different degrees.

Wherein the metal soap salt is calcium stearate. It is cheap and non-toxic, has good processing property, has synergistic effect when used together with other compound additives, can improve thermal stability and eliminate the adverse effect of residual catalyst on resin color and stability.

The preparation method of the polypropylene reinforced toughened flame retardant additive comprises the steps of putting materials in a formula amount into a mixer, mixing for 30-40 minutes, feeding the materials into an intermediate bin, feeding the materials into a granulator from the intermediate bin to extrude particles for forming, grading the particles by screening, feeding the particles into a finished product bin, and packaging to obtain the product. Specifically, the formula materials are put into a mixer, subjected to particle homogenization, mixed with powder, fed into an intermediate bin, fed into a granulator from the intermediate bin, subjected to dissolved gas removal, softened powder and extruded particle forming, and then screened, classified, fed into a finished product bin and packaged to obtain the product.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) the invention utilizes blending modification to effectively improve the performance deficiency, utilizes the comprehensive use of different antioxidants to generate synergistic effect to achieve the oxygen resistance and weather resistance, preferably selects the affinity and compatibility of the modified talcum powder and calcium stearate with polypropylene, and has obvious effect of enhancing toughness;

(2) the invention is compounded in a specific optimal proportion, and through melting granulation, the addition amount is small, no dust is generated, and no pollution is caused;

(3) the invention integrates the functions of strengthening, toughening, oxidation resistance and flame retardance, saves about 30 percent of cost compared with the addition of a single auxiliary agent through the synergistic effect of all components, and has the advantages of synergy, labor saving, safety, energy saving, environmental protection and the like.

Detailed Description

Example 1:

taking 15 parts of hindered phenol tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 15 parts of tris (2, 4-di-tert-butylphenyl) phosphite, 40 parts of talcum powder and 2.5 parts of calcium stearate according to weight percentage, putting the materials into a mixer, mixing for 30-40 minutes, then feeding the materials into an intermediate bin, feeding the materials into a granulator from the intermediate bin to extrude particles for forming, then feeding the materials into a finished product bin through screening particle classification, and packaging to obtain the product.

Example 2:

taking 30 parts of hindered phenol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 30 parts of tris (2, 4-di-tert-butylphenyl) phosphite, 60 parts of talcum powder and 10 parts of calcium stearate according to weight percentage, putting the materials into a mixer, mixing for 30-40 minutes, then putting the materials into an intermediate bin, then putting the materials into a granulator from the intermediate bin to extrude particles for forming, then grading the screened particles, putting the particles into a finished product bin, and packaging to obtain the product.

Example 3:

taking 15 parts of hindered phenol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 30 parts of tris (2, 4-di-tert-butylphenyl) phosphite, 40 parts of talcum powder and 10 parts of calcium stearate according to weight percentage, putting the materials into a mixer, mixing for 30-40 minutes, then putting the materials into an intermediate bin, then putting the materials into a granulator from the intermediate bin to extrude particles for forming, then grading the screened particles, putting the particles into a finished product bin, and packaging to obtain the product.

Example 4:

taking 30 parts of hindered phenol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 15 parts of phosphorous acid tri (2, 4-di-tert-butylphenyl) ester, 60 parts of talcum powder and 2.5 parts of calcium stearate according to weight percentage, putting the materials into a mixer, mixing the materials for 30-40 minutes, then putting the materials into an intermediate bin, then putting the materials into a granulator from the intermediate bin to extrude particles for forming, then grading the screened particles into a finished product bin, and packaging the finished product to obtain the product.

Example 5:

taking 20 parts of hindered phenol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 20 parts of tris (2, 4-di-tert-butylphenyl) phosphite, 50 parts of talcum powder and 5 parts of calcium stearate according to weight percentage, putting the materials into a mixer, mixing for 30-40 minutes, then putting the materials into an intermediate bin, then putting the materials into a granulator from the intermediate bin to extrude particles for forming, then grading the screened particles, putting the particles into a finished product bin, and packaging to obtain the product.