Low temperature resistant transparent polypropylene compound for automobiles and preparation method of low temperature resistant transparent polypropylene compound

Abstract

The invention discloses a low temperature resistant transparent polypropylene compound for automobiles and a preparation method of the low temperature resistant transparent polypropylene compound. Thelow temperature resistant transparent polypropylene compound is characterized by comprising the following components in percentages by weight: 55-80% of homo-polypropylene, 10-35% of random copolymerization polypropylene, 3-9% of a toughener, 3-5% of polyethylene, 0.6-1% of a heat resistant agent and 0.5-1% of a nucleating agent. The homo-polypropylene, the random copolymerization polypropylene,the tougher, the polyethylene, the heat resistant agent and the nucleating agent are uniformly mixed in a high-speed mixer, and then melted and mixed by a double-screw extruder to obtain the compoundso as to expect to solve the problems that an existing product prepared from polypropylene has insufficient low temperature resistant toughness or has the risk of high temperature deformation, and furthermore, an expansion kettle belongs to products installed on the periphery of an engine, and is maintained in a high-temperature environment for a long time, and especially in high temperature seasons, the expansion kettle is prone to thermal oxygen aging, deformation and even explosion.

Description

technical field

[0001] The invention relates to materials for vehicles, in particular to a low-temperature-resistant transparent polypropylene compound for vehicles and a preparation method thereof. Background technique

[0002] Polypropylene is cheap and has a relatively small density. It has good mechanical properties and molding processing properties, high heat resistance, and good chemical stability. Its continuous use temperature can reach 110-120 ° C, but the cold resistance of polypropylene is poor. Low temperature impact resistance; polypropylene products are susceptible to aging under the action of light, heat and oxygen during use, and polypropylene generally has large spherulite volume and light scattering at the interface, resulting in low transparency; existing The preparation method of transparent polypropylene is complex and requires a large investment. The low-temperature toughness of the prepared polypropylene material is 3.2kJ / square meter, which cannot mee...

Examples

Embodiment 1

[0020] This embodiment is to prepare 100 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0021] Step S1, select materials, choose homopolypropylene 55kg, random copolymer polypropylene 35kg, toughening agent 3.2kg, polyethylene 5kg, heat-resistant agent 0.8kg, nucleating agent 1kg; at 230 degrees Celsius, load 2.16KG weight Under the condition, the melt index of its homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min.

[0022] Step S2, mixing evenly, put the homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer and mix evenly.

[0023] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent are melted and kneaded by a twin-screw ex...

Embodiment 2

[0027] According to the foregoing embodiment, another embodiment of the present invention is to prepare 100 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0028] Step S1, select materials, select homopolypropylene 60kg, random copolymer polypropylene 26kg, toughening agent 8.4kg, polyethylene 4kg, heat-resistant agent 0.8kg, nucleating agent 0.8kg; at 230 degrees Celsius, load 2.16KG weight Under the code condition, the melt index of homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min.

[0029] Step S2, mixing evenly, put the homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer and mix evenly.

[0030] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant...

Embodiment 3

[0035] According to the foregoing embodiment, another embodiment of the present invention is to prepare 200 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0036] Step S1, select materials, select homopolypropylene 160kg, random copolymer polypropylene 24kg, toughening agent 6.6kg, polyethylene 6kg, heat-resistant agent 2kg, nucleating agent 1.4kg; at 230 degrees Celsius, load 2.16KG weight Under conditions, the melt index of its homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min;

[0037] Step S2, mixing evenly, placing homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer for uniform mixing;

[0038] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant ag...

technical field

[0001] The invention relates to materials for vehicles, in particular to a low-temperature-resistant transparent polypropylene compound for vehicles and a preparation method thereof. Background technique

[0002] Polypropylene is cheap and has a relatively small density. It has good mechanical properties and molding processing properties, high heat resistance, and good chemical stability. Its continuous use temperature can reach 110-120 ° C, but the cold resistance of polypropylene is poor. Low temperature impact resistance; polypropylene products are susceptible to aging under the action of light, heat and oxygen during use, and polypropylene generally has large spherulite volume and light scattering at the interface, resulting in low transparency; existing The preparation method of transparent polypropylene is complex and requires a large investment. The low-temperature toughness of the prepared polypropylene material is 3.2kJ / square meter, which cannot mee...

Examples

Embodiment 1

[0020] This embodiment is to prepare 100 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0021] Step S1, select materials, choose homopolypropylene 55kg, random copolymer polypropylene 35kg, toughening agent 3.2kg, polyethylene 5kg, heat-resistant agent 0.8kg, nucleating agent 1kg; at 230 degrees Celsius, load 2.16KG weight Under the condition, the melt index of its homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min.

[0022] Step S2, mixing evenly, put the homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer and mix evenly.

[0023] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent are melted and kneaded by a twin-screw ex...

Embodiment 2

[0027] According to the foregoing embodiment, another embodiment of the present invention is to prepare 100 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0028] Step S1, select materials, select homopolypropylene 60kg, random copolymer polypropylene 26kg, toughening agent 8.4kg, polyethylene 4kg, heat-resistant agent 0.8kg, nucleating agent 0.8kg; at 230 degrees Celsius, load 2.16KG weight Under the code condition, the melt index of homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min.

[0029] Step S2, mixing evenly, put the homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer and mix evenly.

[0030] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant...

Embodiment 3

[0035] According to the foregoing embodiment, another embodiment of the present invention is to prepare 200 kilograms of low-temperature-resistant transparent polypropylene composites for automobiles, according to the following steps:

[0036] Step S1, select materials, select homopolypropylene 160kg, random copolymer polypropylene 24kg, toughening agent 6.6kg, polyethylene 6kg, heat-resistant agent 2kg, nucleating agent 1.4kg; at 230 degrees Celsius, load 2.16KG weight Under conditions, the melt index of its homopolypropylene is 6g / 10min, and the melt index of random copolymerized polypropylene is 6g / 10min;

[0037] Step S2, mixing evenly, placing homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant agent, and nucleating agent in a high-speed mixer for uniform mixing;

[0038] Step S3, melting and kneading, the uniformly mixed homopolypropylene, random copolymerized polypropylene, toughening agent, polyethylene, heat-resistant ag...

Images