阅读说明：本技术 一种光泽度好耐老化的聚丙烯组合物及其制备方法 (Polypropylene composition with good glossiness and aging resistance and preparation method thereof ) 是由 陈业中 王林 罗忠富 陈锐 张宇 黄险波 叶南飚 马金成 袁强 于 2020-07-31 设计创作，主要内容包括：本发明公开一种光泽度好耐老化的聚丙烯组合物及其制备方法,所述聚丙烯组合物由以下物质组成：聚丙烯、增韧剂、表面改性玻璃纤维、碳酸钙、改性碳酸钙和加工助剂制得。本发明制备的聚丙烯组合物,用聚丙烯、增韧剂、表面改性玻璃纤维、碳酸钙、改性碳酸钙、加工助剂通过双螺杆挤出机挤出得到,玻璃纤维经过表面改性,部分碳酸钙经过与配位化合物的改性,使得聚丙烯组合物的光泽度和抗老化性能得到显著提升,可以广泛用于汽车内饰中。(The invention discloses a polypropylene composition with good glossiness and aging resistance and a preparation method thereof, wherein the polypropylene composition comprises the following substances: polypropylene, toughening agent, surface modified glass fiber, calcium carbonate, modified calcium carbonate and processing aid. The polypropylene composition prepared by the invention is obtained by extruding polypropylene, a toughening agent, surface modified glass fiber, calcium carbonate, modified calcium carbonate and a processing aid through a double-screw extruder, wherein the glass fiber is subjected to surface modification, and part of the calcium carbonate is subjected to modification with a coordination compound, so that the glossiness and the ageing resistance of the polypropylene composition are remarkably improved, and the polypropylene composition can be widely applied to automotive interior.)

1. The polypropylene composition with good glossiness and aging resistance comprises the following components:

polypropylene;

a toughening agent;

surface-modified glass fibers;

calcium carbonate;

modified calcium carbonate;

a processing aid.

2. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, which comprises the following components in parts by weight:

81.7-83.7 parts by weight of polypropylene;

2.5-3.7 parts of a toughening agent;

4.5-5.8 parts by weight of surface modified glass fiber;

7-8.6 parts of calcium carbonate;

0.8 to 1.3 weight portions of modified calcium carbonate;

0.2 part of processing aid.

3. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein:

the polypropylene is copolymerized polypropylene, the melt index is more than or equal to 15g/10min, the test method of the melt index is GB/T3682-2000, and the test conditions are 230 ℃ and 2.16 Kgf.

4. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein the modified calcium carbonate is prepared by the following steps:

mixing 10 parts by weight of calcium carbonate, 12.3-15 parts by weight of 2, 3-pyridinedicarboxylic acid and 18-23 parts by weight of water uniformly, adding 6-8 parts by weight of methanol, reacting at 150 ℃ for 2-3 hours, cooling to room temperature, filtering and drying to obtain the modified calcium carbonate.

5. The polypropylene composition with good gloss and aging resistance according to any one of claims 1 to 4, wherein:

the particle mesh number of the calcium carbonate is more than 400 meshes.

6. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein the surface modified glass fiber is prepared by the following method:

the surface modified glass fiber is prepared by stirring uniformly 18-22.5 parts by weight of glass fiber, 2-3 parts by weight of calcium carbonate, 8.9-11.5 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane and 30-35 parts by weight of absolute ethyl alcohol, carrying out ultrasonic homogenization for 30-45min, and drying to remove the ethyl alcohol.

7. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein:

the diameter of the glass fiber is 5-10um, and the length is 0.5-3 mm.

8. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein:

the toughening agent is selected from ethylene-octene copolymer and ethylene propylene terpolymer.

9. The polypropylene composition with good gloss and aging resistance as claimed in claim 1, wherein:

the processing aid comprises an antioxidant.

10. A process for the preparation of a polypropylene composition with good gloss and aging resistance according to any one of claims 1 to 9, characterized in that it comprises the steps of:

1) preparation of modified calcium carbonate: mixing 10 parts by weight of calcium carbonate, 12.3-15 parts by weight of 2, 3-pyridinedicarboxylic acid and 18-23 parts by weight of water uniformly, adding 6-8 parts by weight of methanol, reacting at 150 ℃ for 2-3 hours, cooling to room temperature, filtering and drying to obtain the modified calcium carbonate.

2) Preparing the surface modified glass fiber: the surface modified glass fiber is prepared by stirring uniformly 18-22.5 parts by weight of glass fiber, 2-3 parts by weight of calcium carbonate, 8.9-11.5 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane and 30-35 parts by weight of absolute ethyl alcohol, carrying out ultrasonic homogenization for 30-45min, and drying to remove the ethyl alcohol.

3) Uniformly mixing the polypropylene, the toughening agent, the surface modified glass fiber prepared in the step 2), the calcium carbonate, the modified calcium carbonate prepared in the step 1) and the processing aid according to the weight ratio, extruding by using a double screw, wherein the extrusion temperature is 180 ℃ plus 200 ℃, and granulating after extrusion to obtain the polypropylene composition.

Technical Field

The invention belongs to the field of high molecular polymers, and particularly relates to a polypropylene composition with good glossiness and aging resistance and a preparation method thereof.

Background

Polypropylene is a polymer obtained by addition polymerization of propylene. Polypropylene is a colorless, odorless, non-toxic, translucent solid substance. Due to the excellent thermoplasticity, chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, the polypropylene is rapidly and widely developed and applied in a plurality of fields such as machinery, automobiles, electronic and electric appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the coming out.

With the rapid development of national economy, the development of the automobile industry is very rapid, polypropylene materials are gradually replacing wood products due to good processability and plasticity of polypropylene, the mechanical function of metal is gradually replaced by high strength toughness and high wear resistance, and the polypropylene is widely applied to the field of automobile preparation.

In the wide application of polypropylene in automobile interior decoration, a new problem is exposed, and in an environment of high temperature and high humidity, precipitates are generated on the surface of a polypropylene part, and simultaneously, a sticky phenomenon is generated, and the gloss of the surface of the part is changed.

Disclosure of Invention

The invention aims to provide an anti-aging polypropylene composition with good glossiness, which has high glossiness, good anti-aging performance and good mechanical performance.

Further, there is a need for a process for the preparation of the above polypropylene composition.

The polypropylene composition with good glossiness and aging resistance comprises the following components:

polypropylene;

a toughening agent;

surface-modified glass fibers;

calcium carbonate;

modified calcium carbonate;

a processing aid.

Preferably, the polypropylene composition with good glossiness and aging resistance comprises the following components in parts by weight:

more preferably, the polypropylene composition with good glossiness and aging resistance comprises the following components in parts by weight:

preferably, the polypropylene is copolymerized polypropylene, the melt index is more than or equal to 15g/10min, wherein the test method of the melt index is GB/T3682-2000, and the test condition is 230 ℃ and 2.16 Kgf.

The preparation method of the modified calcium carbonate comprises the following steps:

mixing 10 parts by weight of calcium carbonate, 12.3-15 parts by weight of 2, 3-pyridinedicarboxylic acid and 18-23 parts by weight of water uniformly, adding 6-8 parts by weight of methanol, reacting at 150 ℃ for 2-3 hours, cooling to room temperature, filtering and drying to obtain the modified calcium carbonate.

Wherein the particle mesh number of the calcium carbonate is more than 400 meshes.

Preferably, the modified calcium carbonate is prepared by the following method:

mixing 10 parts by weight of 400-mesh calcium carbonate, 12.3-15 parts by weight of 2, 3-pyridinedicarboxylic acid and 20 parts by weight of water uniformly, adding 7 parts by weight of methanol, reacting at 150 ℃ for 2 hours, cooling to room temperature, filtering and drying to obtain the modified calcium carbonate.

Wherein the surface modified glass fiber is prepared by the following method:

the surface modified glass fiber is prepared by stirring uniformly 18-22.5 parts by weight of glass fiber, 2-3 parts by weight of calcium carbonate, 8.9-11.5 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane and 30-35 parts by weight of absolute ethyl alcohol, carrying out ultrasonic homogenization for 30-45min, and drying to remove the ethyl alcohol.

Preferably, the surface modified glass fiber is prepared by the following method:

20 parts by weight of glass fiber, 2.5 parts by weight of calcium carbonate, 10 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane and 30 parts by weight of absolute ethyl alcohol are stirred uniformly, ultrasonically homogenized for 30min, and dried to remove the ethyl alcohol, thus obtaining the surface modified glass fiber.

Preferably, the glass fiber has a diameter of 5-10um and a length of 0.5-3 mm.

Wherein the toughening agent is selected from ethylene-octene copolymer (POE) and ethylene propylene terpolymer (EPDM).

Wherein the processing aid comprises an antioxidant, and can be selected from common antioxidants such as antioxidant 1010 and the like.

The preparation method of the polypropylene composition with good glossiness and aging resistance is characterized by comprising the following steps:

1) preparation of modified calcium carbonate: mixing 10 parts by weight of calcium carbonate, 12.3-15 parts by weight of 2, 3-pyridinedicarboxylic acid and 18-23 parts by weight of water uniformly, adding 6-8 parts by weight of methanol, reacting at 150 ℃ for 2-3 hours, cooling to room temperature, filtering and drying to obtain the modified calcium carbonate.

2) Preparing the surface modified glass fiber: the surface modified glass fiber is prepared by stirring uniformly 18-22.5 parts by weight of glass fiber, 2-3 parts by weight of calcium carbonate, 8.9-11.5 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane and 30-35 parts by weight of absolute ethyl alcohol, carrying out ultrasonic homogenization for 30-45min, and drying to remove the ethyl alcohol.

3) Uniformly mixing the polypropylene, the toughening agent, the surface modified glass fiber prepared in the step 2), the calcium carbonate, the modified calcium carbonate prepared in the step 1) and the processing aid according to the weight ratio, extruding by using a double screw, wherein the extrusion temperature is 180 ℃ plus 200 ℃, and granulating after extrusion to obtain the polypropylene composition.

Compared with the prior art, the polypropylene composition prepared by the invention is obtained by extruding polypropylene, a toughening agent, surface modified glass fiber, calcium carbonate, modified calcium carbonate and a processing aid through a double-screw extruder, wherein the glass fiber is subjected to surface modification, and part of the calcium carbonate is subjected to modification with a coordination compound, so that the glossiness and the ageing resistance of the polypropylene composition are obviously improved, and the polypropylene composition can be widely applied to automotive interior trim.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments in order to make the technical field better understand the scheme of the present invention.

The original explanation is as follows:

polypropylene: taitiningbo, copolymerized polypropylene, Cat PP-5090T-1, under the test conditions of GB/T3682-;

calcium carbonate: shijiazhuang Xinsheng mineral products Co., Ltd., 200 mesh, 400 mesh;

a toughening agent: ethylene-octene copolymers (POE), dow, ENGAGE 8452;

glass fiber: the specifications of the constant-honest glass fiber company Limited in the salt city are respectively 5-10um in diameter, 0.5-3mm in length, 12-15um in diameter and 0.5-3mm in length.

Processing aid: antioxidant 1010, Zhengzhou Jiajie chemical products Co., Ltd.

The remainder was commercially available.