CN109401298B

CN109401298B - Highlight piano black PA/PC alloy resin composition and preparation method thereof

Info

Publication number: CN109401298B
Application number: CN201811117002.3A
Authority: CN
Inventors: 查超; 周霆; 辛敏琦
Original assignee: Shanghai Kumho Sunny Plastics Co Ltd
Current assignee: Shanghai Kumho Sunny Plastics Co Ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2021-03-16
Anticipated expiration: 2038-09-25
Also published as: CN109401298A

Abstract

The invention relates to a high-gloss piano black PA/PC alloy resin composition and a preparation method thereof, wherein the PA/PC alloy resin composition comprises the following components in parts by weight: 60-90 parts of polyamide PA resin, 10-40 parts of polycarbonate PC resin, 1-5 parts of compatilizer, 0.3-2.0 parts of black toner and 0.1-1.5 parts of antioxidant; the preparation method comprises the following steps: weighing the components in parts by weight, uniformly mixing to obtain a premix, adding the premix into a double-screw extruder, carrying out melt extrusion, cooling and granulating to obtain the target product. The PA/PC alloy resin obtained by the invention has the appearance of high gloss piano black, and also has the excellent toughness and dimensional stability of PC, and the excellent wear resistance and chemical resistance of PA.

Description

Highlight piano black PA/PC alloy resin composition and preparation method thereof

Technical Field

The invention relates to an alloy resin composition and a preparation method thereof, in particular to a high-gloss piano black PA/PC alloy resin composition and a preparation method thereof.

Background

In recent years, automobile parts are increasingly using the effect of high-gloss piano black, including automobile exterior parts (grilles, pillar boards) and interior parts (navigation panels, gear panels). The high-gloss spraying-free piano black plastic is a low-cost and environment-friendly mode. However, since the automobile interior has a high requirement on the scratch resistance of the material, common piano black materials, such as piano black PC/ABS alloy, PC, PMMA/ABS alloy, etc., are difficult to meet. The PA of the piano black can meet the strict scratch resistance requirement of the interior decoration, however, the PA material contains an amide group, the group is easy to absorb water, the size of a part is enlarged, and the size instability limits the application of the piano black PA.

The low-water-absorption alloy can be obtained by blending and modifying PA and PC with low water absorption. However, PA and PC are two materials which are thermodynamically incompatible, and the material obtained by direct blending is poor in mechanical properties and cannot be used, and it is impossible to obtain the appearance of piano black due to the poor compatibility of the two materials.

By finding a proper compatilizer and improving the compatibility of PA and PC, the piano black PA/PC alloy resin composition with excellent mechanical properties and low water absorption can be prepared.

Disclosure of Invention

Aiming at overcoming the defects of the prior art, the invention provides a piano black PA/PC alloy resin composition and a preparation method thereof.

The purpose of the invention is realized by the following technical scheme:

the invention provides a high-gloss piano black PA/PC alloy resin composition which comprises the following components in parts by weight:

preferably, the PA resin is amorphous transparent PA, the light transmittance is more than or equal to 80%, and the PA resin comprises one or more of PA6I/6T, PA6I/6, PA6I/6T/MACMI and PA 12/MACMI.

Preferably, the PC is bisphenol A type PC, and the light transmittance is more than or equal to 80%.

Preferably, the compatilizer is bisphenol A diglycidyl ether DGEBA with the epoxy equivalent weight of 184-200 g/eq.

Preferably, the black toner is dye black.

Preferably, the antioxidant is selected from one or more of antioxidant 245, antioxidant 1076 and antioxidant 168.

The invention also provides a preparation method of the high-gloss piano black PA/PC alloy resin composition, which comprises the following steps:

(1) weighing 60-90 parts of PA resin, 10-40 parts of PC resin, 1-5 parts of compatilizer, 0.3-2.0 parts of black toner and 0.1-1.5 parts of antioxidant according to parts by weight, and uniformly mixing to obtain a premix;

(2) adding the premix into a double-screw extruder, performing melt extrusion, cooling and granulating to obtain the target product.

Preferably, the extrusion temperature of the melt extrusion is 230-280 ℃, and the screw rotation speed is 200-500 rpm.

The invention utilizes the reaction of the epoxy group of the epoxy resin with the amino and the carboxyl of the PC and the reaction of the epoxy group with the amino of the PA to generate the copolymer of the PC and the PA, plays the role of a compatilizer of the PA and the PC, promotes the mutual dispersion of the two materials and obtains the PA/PC material with excellent comprehensive performance.

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

(1) the comprehensive performance is excellent: the PA/PC alloy resin composition with high gloss piano black and excellent physical and mechanical properties is prepared by blending the PA resin and the PC resin and introducing the compatilizer to improve the compatibility of the PA resin and the PC resin;

(2) the preparation method has simple process and low cost, and the prepared PA/PC alloy resin is particularly suitable for the field of automobiles.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

The following examples provide a high gloss piano black PA/PC alloy resin composition, comprising the following components in parts by weight:

the PA resin is amorphous transparent PA, has light transmittance of more than or equal to 80 percent, and comprises one or more of PA6I/6T, PA6I/6, PA6I/6T/MACMI and PA 12/MACMI.

The PC is bisphenol A type PC, and the light transmittance is more than or equal to 80%.

The compatilizer is bisphenol A type epoxy resin: bisphenol A diglycidyl ether DGEBA with an epoxy equivalent of 184-200 g/eq.

The black toner is dye black.

The antioxidant is selected from one or more of antioxidant 245, antioxidant 1076 and antioxidant 168.

Example 1

The embodiment provides a high-gloss piano black PA/PC alloy resin composition, which comprises the following raw materials:

putting the weighed raw materials into a high-speed mixer for uniform premixing to obtain a premix; and (3) melting and extruding the obtained premix through a double-screw extruder at the extrusion temperature of 250 ℃ and the screw rotating speed of 350 r/min, and cooling and granulating to obtain the PA/PC alloy resin composition.

Example 2

putting the weighed raw materials into a high-speed mixer for uniform premixing to obtain a premix; and (3) melting and extruding the obtained premix by a double-screw extruder at the extrusion temperature of 230 ℃ and the screw rotating speed of 500 rpm, and cooling and granulating to obtain the PA/PC alloy resin composition.

Example 3

putting the weighed raw materials into a high-speed mixer for uniform premixing to obtain a premix; and (3) melting and extruding the obtained premix by a double-screw extruder at the extrusion temperature of 280 ℃ and the screw rotating speed of 200 r/min, and cooling and granulating to obtain the PA/PC alloy resin composition.

Example 4

the preparation method of the PA/PC alloy resin composition is the same as that of the embodiment 1.

Example 5

Example 6

Example 7

Example 8

Comparative example 1

The comparative example provides a high-gloss piano black PA/PC alloy resin composition, which comprises the following raw materials:

Comparative example 2

PA6I/6T/MACMI 100 portions,

0.5 part of black dye,

1680.9 parts of antioxidant.

Comparative example 3

the PA/PC alloy resin composition was prepared in the same manner as in example 7.

Comparative example 4

Comparative example 5

the preparation method of the PA/PC alloy resin composition is the same as that of the embodiment 2.

The parts by weight of each component of examples 1 to 8 and comparative examples 1 to 8 are shown in Table 1.

TABLE 1

	PA resin	PC resin	Compatilizer	Black toner	Antioxidant agent
						Example 1	80	20	1	0.5	0.9
Example 2	60	40	2	0.5	0.9
						Example 3	60	40	2	0.5	0.9
Example 4	70	30	1.5	0.5	0.9
						Example 5	80	20	1	0.5	0.9
Example 6	80	20	1	0.5	0.9
						Example 7	90	10	5	0.3	1.5
Example 8	80	20	3	2.0	0.1
						Comparative example 1	80	20	-	0.5	0.9
Comparative example 2	100	-	-	0.5	0.9
						Comparative example 3	90	10	8	0.5	0.9
Comparative example 4	95	5	5	0.3	0.9
						Comparative example 5	50	50	2	0.5	0.9
Comparative example 6	80	20	1	0.5	0.9
						Comparative example 7	80	20	1	0.5	0.9
Comparative example 8	80	20	1	0.5	0.9

Comparative example 6

This comparative example provides a high-gloss piano black PA/PC alloy resin composition having substantially the same raw material composition as in example 1, except that: the PA resin used in this comparative example was PA 6.

Comparative example 7

This comparative example provides a high-gloss piano black PA/PC alloy resin composition having substantially the same raw material composition as in example 1, except that: the compatibilizer used in this comparative example was 1,1,2, 2-tetra-p-hydroxyphenylethane tetraglycidyl ether epoxy resin.

Comparative example 8

This comparative example provides a high-gloss piano black PA/PC alloy resin composition having substantially the same raw material composition as in example 1, except that: the compatilizer used in this comparative example was para-aminophenol triglycidyl epoxy resin.

Performance evaluation:

the PA/PC alloy resin compositions prepared in each example and comparative example were subjected to mechanical property tests, and injection-molded to evaluate the appearance of a high-gloss color plate (size: length, width, thickness: 140mm, 90mm, 3mm), and the results are shown in tables 2 and 3:

charpy notched impact strength: the impact energy is 4J according to the test of ISO 179-1:2010 (E);

vicat softening point: testing according to ISO 306:2013(E) standard under the test condition of 5Kg at 50 ℃/h;

flexural modulus: testing according to ISO 178:2010(E) standard, wherein the testing speed is 2 mm/min;

saturated water absorption: the particles were tested at 23 ℃ in an environment of 50% RH.

Scratch resistance test: the gloss (60 °) retention before and after scratching was tested according to GMW14125, with 10 scratches back and forth under a load of 8.3N, using a high gloss plaque as an experiment.

TABLE 2 test results of mechanical properties, appearance and water absorption of each example

TABLE 3 mechanical property test results and appearance and water absorption test results for each comparative example

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. The highlight piano black PA/PC alloy resin composition is characterized by comprising the following components in parts by weight:

the PA resin is amorphous transparent PA, has light transmittance of more than or equal to 80 percent, and comprises one or more of PA6I/6T, PA6I/6, PA6I/6T/MACMI and PA 12/MACMI;

the compatilizer is bisphenol A diglycidyl ether, and the epoxy equivalent is 184-200 g/eq.

2. The high-gloss piano black PA/PC alloy resin composition according to claim 1, wherein the PC is bisphenol A PC, and the light transmittance is not less than 80%.

3. The highlight piano black PA/PC alloy resin composition according to claim 1, wherein the black toner is dye black.

4. The high gloss piano black PA/PC alloy resin composition according to claim 1, wherein the antioxidant is selected from one or more of antioxidant 245, antioxidant 1076 and antioxidant 168.

5. A method for preparing the high gloss piano black PA/PC alloy resin composition according to any one of claims 1 to 4, comprising the steps of:

6. The method for preparing the resin composition of high gloss piano black PA/PC alloy according to claim 5, wherein in the step (2), the extrusion temperature of the melt extrusion is 230-280 ℃, and the screw rotation speed is 200-500 rpm.