阅读说明：本技术 一种高柔韧性、高冲击性的改性塑料的制备方法 (Preparation method of modified plastic with high flexibility and high impact property ) 是由 康潮生 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种高柔韧性、高冲击性的改性塑料的制备方法,按照重量份数计,包括：聚丙烯50～80份、苯乙烯/己烯-丁烯/苯乙烯嵌段共聚物10～15份、二盐基邻苯二甲酸铅8～12份、铜离子纤维15～20份、碱木质素16～22份、共混树脂24～30份、聚芳讽3～6份、硅藻土12～18份、氢氧化镁8～16份、酸三丁酯6～12份、热稳定剂8～15份、核壳结构聚硅氧烷-丙烯酸酯聚合物乳液2～4份。(The invention discloses a preparation method of a modified plastic with high flexibility and high impact property, which comprises the following steps of: 50-80 parts of polypropylene, 10-15 parts of styrene/hexene-butene/styrene block copolymer, 8-12 parts of dibasic lead phthalate, 15-20 parts of copper ion fiber, 16-22 parts of alkali lignin, 24-30 parts of blending resin, mock 3-6 parts of polyaromatic, 12-18 parts of diatomite, 8-16 parts of magnesium hydroxide, 6-12 parts of tributyl phosphate, 8-15 parts of heat stabilizer and 2-4 parts of core-shell structure polysiloxane-acrylate polymer emulsion.)

1. A preparation method of a modified plastic with high flexibility and high impact property is characterized by comprising the following steps of: 50-80 parts of polypropylene, 10-15 parts of styrene/hexene-butene/styrene block copolymer, 8-12 parts of dibasic lead phthalate, 15-20 parts of copper ion fiber, 16-22 parts of alkali lignin, 24-30 parts of blending resin, mock 3-6 parts of polyaromatic, 12-18 parts of diatomite, 8-16 parts of magnesium hydroxide, 6-12 parts of tributyl phosphate, 8-15 parts of heat stabilizer and 2-4 parts of core-shell structure polysiloxane-acrylate polymer emulsion; the preparation method comprises the following steps:

s1: weighing the raw materials according to the proportion;

s2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding the raw materials into an internal mixer, mixing for 10-15 min, pouring out the materials, and cooling for later use;

s3: and (4) adding the material obtained in the step S2, a heat stabilizer, the core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and granulating, wherein the rotating speed of a main machine is 300-400 rpm, and the frequency of a granulator is 20-30 Hz.

2. The method for preparing the modified plastic with high flexibility and high impact resistance as claimed in claim 1, wherein the blending resin comprises polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of (10-15): (10-20): (12-15).

3. The method of claim 1, wherein the thermal stabilizer is antimony isooctanoate or dibutyltin dilaurate.

4. The method for preparing the modified plastic with high flexibility and high impact resistance according to claim 1, wherein the mixing temperature of the internal mixer in the step S2 is 120-125 ℃.

5. The method for preparing the modified plastic with high flexibility and high impact resistance as claimed in claim 1, wherein the temperature ranges from 130 to 135 ℃, 150 to 160 ℃, 170 to 180 ℃, 200 to 210 ℃, 220 to 230 ℃ and 205 to 210 ℃ in the step S3 from the feeding to the head.

Technical Field

The invention belongs to the technical field of modified plastics, and particularly relates to a preparation method of a modified plastic with high flexibility and high impact property.

Background

Modified plastics are plastic products which are usually manufactured by processing and modifying through methods of filling, blending, enhancing and the like on the basis of general plastics and engineering plastics, the modified plastics benefit from the productivity of global household appliances, computers, electric tools, toys and the like and the cost advantage in other production elements, China becomes a large manufacturing country in the fields, and thus the development of the domestic modified plastics industry is promoted, parts manufactured by the modified plastics have a series of advantages of light weight, rich colors, easy forming and the like, but the existing modified plastics have certain defects in the using process, such as: the existing modified plastic has poor impact resistance, easy deformation, easy scratching, poor light and ultraviolet resistance and the like.

Polypropylene has good corrosion resistance, rigidity and transparency, and is widely used for manufacturing packaging containers at present. However, polypropylene has poor impact resistance, becomes brittle at low temperature and is easy to age, and in order to reduce raw material investment and production cost, many manufacturers make the weight of the manufactured packaging container lighter and the thickness of the container wall thinner as much as possible, so that the existing packaging container made of polypropylene as a raw material has very soft hand feeling and insufficient strength, is easy to deform and crack when being held by hands, is difficult to contain liquid or semi-liquid packaging materials, and particularly when containing liquid or semi-liquid materials with high temperature, the liquid or semi-liquid materials with high temperature are easy to overflow to cause injury to human bodies.

Disclosure of Invention

The invention aims to provide a preparation method of modified plastic with high flexibility and high impact property, which comprises the following steps of: 50-80 parts of polypropylene, 10-15 parts of styrene/hexene-butene/styrene block copolymer, 8-12 parts of dibasic lead phthalate, 15-20 parts of copper ion fiber, 16-22 parts of alkali lignin, 24-30 parts of blending resin, mock 3-6 parts of polyaromatic, 12-18 parts of diatomite, 8-16 parts of magnesium hydroxide, 6-12 parts of tributyl phosphate, 8-15 parts of heat stabilizer and 2-4 parts of core-shell structure polysiloxane-acrylate polymer emulsion.

Further, the blending resin is polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of (10-15): (10-20): (12-15).

Further, the heat stabilizer is antimony isooctanoate or dibutyltin dilaurate.

The preparation method comprises the following steps:

s1: the raw materials are weighed according to the proportion.

S2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding into an internal mixer, mixing for 10-15 min, pouring out the material, and cooling for later use.

S3: and (4) adding the material obtained in the step S2, a heat stabilizer, the core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and granulating, wherein the rotating speed of a main machine is 300-400 rpm, and the frequency of a granulator is 20-30 Hz.

Further, the temperature of the internal mixer in the step S2 is 120-125 ℃.

Further, in the step S3, the temperature ranges from the feeding to the head are 130-135 ℃, 150-160 ℃, 170-180 ℃, 200-210 ℃, 220-230 ℃ and 205-210 ℃.

Compared with the prior art, the invention has the following beneficial effects:

in the invention, the modified plastic prepared by taking polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite, tributyl acid, a heat stabilizer, core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide as raw materials has high flexibility and high impact property after performance test.

Detailed Description

The following embodiments of the present invention are described in detail, and the embodiments are implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Example 1

A preparation method of a modified plastic with high flexibility and high impact property comprises the following steps of: 50 parts of polypropylene, 10 parts of styrene/hexene-butene/styrene block copolymer, 8 parts of dibasic lead phthalate, 15 parts of copper ion fiber, 16 parts of alkali lignin, 24 parts of blending resin, mock 3 parts of polyaryl, 12 parts of diatomite, 8 parts of magnesium hydroxide, 6 parts of tributyl acid, 8 parts of heat stabilizer and 2 parts of core-shell polysiloxane-acrylate polymer emulsion.

Wherein the blending resin is polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of 10:10: 12; the heat stabilizer is antimony isooctanoate.

The method specifically comprises the following steps:

s1: the raw materials are weighed according to the proportion.

S2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding the raw materials into an internal mixer, mixing for 10min, pouring out the materials, wherein the mixing temperature is 120 ℃, and cooling for later use.

S3: adding the material obtained in the step S2, a heat stabilizer, core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and pelletizing, wherein the rotating speed of a main machine is 300rpm, and the frequency of the pelletizer is 20 Hz; wherein the temperature ranges from feeding to the head are 130 ℃, 150-160 ℃, 170 ℃, 200 ℃, 220 ℃ and 205 ℃.

Example 2

A preparation method of a modified plastic with high flexibility and high impact property comprises the following steps of: 80 parts of polypropylene, 15 parts of styrene/hexene-butene/styrene block copolymer, 12 parts of dibasic lead phthalate, 20 parts of copper ion fiber, 22 parts of alkali lignin, 30 parts of blending resin, mock 6 parts of polyaryl, 18 parts of diatomite, 16 parts of magnesium hydroxide, 12 parts of tributyl acid, 15 parts of heat stabilizer and 4 parts of core-shell polysiloxane-acrylate polymer emulsion.

Wherein the blending resin is polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of 15:20: 15; the heat stabilizer is dibutyltin dilaurate.

The method specifically comprises the following steps:

s1: the raw materials are weighed according to the proportion.

S2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding the raw materials into an internal mixer, mixing for 15min, pouring out the materials, wherein the mixing temperature is 125 ℃, and cooling for later use.

S3: adding the material obtained in the step S2, a heat stabilizer, core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and pelletizing, wherein the rotating speed of a main machine is 400rpm, and the frequency of the pelletizer is 30 Hz; wherein the temperature ranges from the feeding to the machine head are 135 ℃, 160 ℃, 180 ℃, 210 ℃, 230 ℃ and 210 ℃.

Example 3

A preparation method of a modified plastic with high flexibility and high impact property comprises the following steps of: 60 parts of polypropylene, 12 parts of styrene/hexene-butene/styrene block copolymer, 10 parts of dibasic lead phthalate, 17 parts of copper ion fiber, 18 parts of alkali lignin, 26 parts of blending resin, mock 4 parts of polyaromatic, 14 parts of diatomite, 12 parts of magnesium hydroxide, 9 parts of tributyl acid, 10 parts of heat stabilizer and 2.5 parts of core-shell structure polysiloxane-acrylate polymer emulsion.

Wherein the blending resin is polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of 12:15: 14; the heat stabilizer is antimony isooctanoate.

The method specifically comprises the following steps:

s1: the raw materials are weighed according to the proportion.

S2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding the raw materials into an internal mixer, mixing for 12min, pouring out the materials, wherein the mixing temperature is 122 ℃, and cooling for later use.

S3: adding the material obtained in the step S2, a heat stabilizer, core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and pelletizing, wherein the rotating speed of a main machine is 350rpm, and the frequency of the pelletizer is 24 Hz; wherein the temperature ranges from feeding to the head are 132 ℃, 155 ℃, 175 ℃, 204 ℃, 226 ℃ and 206 ℃.

Example 4

A preparation method of a modified plastic with high flexibility and high impact property comprises the following steps of: 70 parts of polypropylene, 14 parts of styrene/hexene-butene/styrene block copolymer, 11 parts of dibasic lead phthalate, 18 parts of copper ion fiber, 21 parts of alkali lignin, 28 parts of blending resin, mock 5 parts of polyaromatic, 16 parts of diatomite, 15 parts of magnesium hydroxide, 11 parts of tributyl acid, 14 parts of heat stabilizer and 3 parts of core-shell polysiloxane-acrylate polymer emulsion.

Wherein the blending resin is polyvinyl butyral, polyethylene terephthalate and vinyl resin in a weight ratio of 14:18: 14; the heat stabilizer is dibutyltin dilaurate.

The method specifically comprises the following steps:

s1: the raw materials are weighed according to the proportion.

S2: adding the weighed raw materials into polypropylene, styrene/hexene-butene/styrene block copolymer, dibasic lead phthalate, copper ion fiber, alkali lignin, blending resin, polyaryl mock, diatomite and tributyl acid, adding the raw materials into an internal mixer, mixing for 14min, pouring out the materials, wherein the mixing temperature is 124 ℃, and cooling for later use.

S3: adding the material obtained in the step S2, a heat stabilizer, core-shell structure polysiloxane-acrylate polymer emulsion and magnesium hydroxide into a double-screw extruder, and extruding and granulating, wherein the rotating speed of a main machine is 300-400 rpm, and the frequency of a granulator is 20-30 Hz; wherein the temperature ranges from the feeding to the head are 134 ℃, 159 ℃, 178 ℃, 207 ℃, 228 ℃ and 208 ℃.

Performance testing: the plastic samples prepared in examples 1-4 were tested for tensile strength and elongation at break according to the standard GB/T1040-; testing the impact strength according to the standard GB/T1040-; the flexural strength was tested according to the standard GB/T9341-2000, the test results are shown in Table 1,

table 1. test results:

as can be seen from Table 1, the modified plastics prepared in the embodiments 1-4 of the present invention have excellent mechanical properties.