CN105647174A - Wear-resistant and high-temperature resistant nylon composite material and preparation method therefor - Google Patents

Abstract

The invention discloses a wear-resistant and high-temperature resistant nylon composite material. The wear-resistant and high-temperature resistant nylon composite material is prepared from the following ingredients in parts by weight: 65-95 parts of high-temperature resistant nylon, 1-15 parts of pretreated molybdenum disulfide, 0.1-1.0 part of antioxidant and 0.2-1.0 part of lubricant. The invention also discloses a preparation method for the wear-resistant and high-temperature resistant nylon composite material. According to the wear-resistant and high-temperature resistant nylon composite material and the preparation method therefor, the pretreated molybdenum disulfide is added as a wear resistance modifier, and proper processing aids are added, so that the wear resistance and heat resistance of high-temperature nylon are improved, the use value is higher, the field of employment is widened, and the wear-resistant and high-temperature resistant nylon composite material can be extensively applied to the fields of electronic electrical appliances, automobiles, war industry and the like; the composite material disclosed by the invention is simple in extruded preparation process, high in continuous production efficiency and stable in product quality; and the high-temperature nylon and the pretreated molybdenum disulfide are pre-mixed firstly, so that the dispersity of the pretreated molybdenum disulfide in the composite material is greatly improved, and the wear resistance of the composite material is improved.

Description

A kind of Wear-resistant, high-temperature resistant nylon composite materials and its preparation method

Technical field

The invention belongs to technical field of polymer materials, specifically in particular to a kind of wear-resisting high temperature resistant nylon composite material and its preparation method.

Background technology

High temperature resistant nylon is the one in aromatic polyamide, and it is that the diamines by band aromatic nucleus or dicarboxylic acid and aliphatic dicarboxylic acid or diamines are through the preparation-obtained polyamide resin of polycondensation. Owing to importing aromatic nucleus in polymeric amide molecular backbone chain, thus improve its thermotolerance and mechanical property, reduce water-intake rate, and have more suitable performance/price ratio. So high temperature resistant nylon is the resin of a kind of high heat resistance between general engineering plastic nylon and thermostability engineering plastic polyether-ether-ketone (PEEK), increasing in field application such as machinery, electronics. High temperature resistant nylon product mainly contains polymeric amide 46, MXD6,6T/66,6T/6I, 6T/6I/66 and 9T at present. Modes such as adding anti-wear agent is adopted high temperature resistant nylon to carry out wear-resisting modification to increase its wear resistance though prior art has, but due to the poor compatibility between each addO-on therapy, and the mechanical property loss causing matrix material is serious, limit applying of matrix material.

Summary of the invention

The present invention provides a kind of wear-resisting high temperature resistant nylon composite material and its preparation method, mainly through high temperature resistant nylon is carried out wear-resisting modification, with reach improve matrix material over-all properties, broaden application field.

For achieving the above object, the technical solution used in the present invention is as follows:

A wear-resisting high temperature resistant nylon composite material, is prepared from by weight by following component:

High temperature resistant nylon 65-95 part

Pretreated molybdenumdisulphide 1-15 part

Oxidation inhibitor 0.1-1.0 part

Lubricant 0.2-1.0 part

Described pretreated molybdenumdisulphide adopts following method to prepare: being added in 5-50L dehydrated alcohol by 1-10kg molybdenumdisulphide, ultrasonic disperse is even; Ultrasonic time is 1-2 hour, ultrasonic temperature 30-50 DEG C; Then 0.1-2kg maleic anhydride is slowly added in ethanolic soln, stirs 1-2 hour, filter, with Air drying after deionized water wash, preserve.

Described high temperature resistant nylon is nylon 46 (PA46), nylon 6T(PA6T), nylon 9 T(PA9T) in one.

In the preparation process of described pretreated molybdenumdisulphide, dehydrated alcohol plays the effect of dispersion medium, maleic anhydride easily and ethanol generation single-esterification and generate toxilic acid monoesters, the hydroxyl on a remaining carboxyl and molybdenumdisulphide powder surface generates hydrogen bond, and orientation is coated on molybdenumdisulphide microparticle surfaces. The coated one layer of maleic acid ester of molybdenumdisulphide surface meeting, it is possible to significantly improve the consistency of system, thus improve the mechanical property especially wear resisting property of composition.

Described molybdenumdisulphide, its purity >=99.9%, median size are 1.5 ��m; Water content��0.05wt% in described molybdenumdisulphide.

Described oxidation inhibitor is four [��-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010) and three (2,4-tert-butyl-phenyl) phosphorous acid ester (irgasfos 168s) are by weight the mixture being 1:1.

Described lubricant is at least one in barium stearate, Zinic stearas.

It is a further object to provide the preparation method of a kind of Wear-resistant, high-temperature resistant nylon composite materials, it adopts following step:

(1) 65-95 part high temperature resistant nylon, the pretreated molybdenumdisulphide of 1-15 part are placed in high mixer, at 80 DEG C, stir under the rotating speed of 1000 turns/min evenly; Add 0.1-1.0 part oxidation inhibitor again, 0.2-1.0 part lubricant mixes under normal temperature;

(2) joining in twin screw extruder by the raw material mixed through step (1), melting extruding pelletization, the temperature of forcing machine is 280 DEG C-320 DEG C, rate of extrusion 300r/min.

The usefulness of the present invention is:

1, the present invention adds pretreated molybdenumdisulphide as abrasion resistance modifier, and add suitable processing aid, thus improve the wear-resisting of high-temperature nylon and resistance toheat, make it have higher use value, and widened use field, the fields such as electronic apparatus, automobile, military project can be widely used in.

2, matrix material of the present invention extrudes preparation technology simply, continuous production efficiency height, constant product quality.

3, high-temperature nylon and pretreated molybdenumdisulphide are first carried out pre-mixing by the present invention, thus greatly improve the dispersion in the composite of pretreated molybdenumdisulphide, it is to increase the wear resisting property of matrix material.

Embodiment

The content of the present invention is illustrated further, but the content of the present invention is not only confined to the following examples below in conjunction with specific examples.

The preparation method of the Wear-resistant, high-temperature resistant nylon composite materials of the present invention, adopts following step:

(1) following method is adopted to prepare described pretreated molybdenumdisulphide: being added in 10L dehydrated alcohol by 5kg molybdenumdisulphide, ultrasonic disperse is even; Ultrasonic time is 1-2 hour, ultrasonic temperature 30-50 DEG C; Then 1kg maleic anhydride is slowly added in ethanolic soln, stirs 1-2 hour, filter, with Air drying after deionized water wash, preserve.

(2) high temperature resistant nylon and pretreated molybdenumdisulphide are placed in high mixer, at 80 DEG C, stir 5 minutes under the rotating speed of 1000 turns/min; Add the oxidation inhibitor that weighs up again, lubricant normal temperature mixes.

(3) raw material mixed is joined in twin screw extruder, melting extruding pelletization, extrusion temperature is: 270 DEG C, a district, 280 DEG C, 2nd district, 295 DEG C, 3rd district, 305 DEG C, 4th district, 310 DEG C, 5th district, 300 DEG C, 6th district, 295 DEG C, 7th district, head 285 DEG C, rate of extrusion 300r/min.

Feed composition proportioning as shown in table 1 is adopted to obtain embodiment 1-5, and based on the formula of embodiment 5, do not add pretreated molybdenumdisulphide obtain comparative example 1, simultaneously, after the pellet drying that embodiment 1-5 and comparative example 1 are prepared, according to standard Shooting Technique injection moulding standard batten, respectively it being carried out Mechanics Performance Testing, testing standard and performance data are in table 2.

Component proportion composition in each embodiment of table 1

	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Comparative example 1
							PA6T	95	85	65
PA46				80
							PA9T					70	70
Pretreated molybdenumdisulphide	1	5	5	15	10
							Antioxidant 1010	0.05	0.1	0.2	0.2	0.5	0.5
Irgasfos 168	0.05	0.1	0.2	0.3	0.5	0.5
							Zinic stearas	0.2		0.8		1	1
Barium stearate		0.4		0.6

Table 2 performance test

	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Comparative example 1
							Tensile strength MPa	117	101	104	126	108	42
Flexural strength MPa	196	197	202	178	211	99
							Abrasion %	13	15	11	14	12	66
Frictional coefficient	0.18	0.17	0.13	0.18	0.15	0.59

Detecting data from upper table 2 it may be seen that after adding a certain proportion of pretreated molybdenumdisulphide in material prescription system, material all has lower frictional coefficient, wear resisting property obtains bigger raising. Integrated data illustrates that the technical program achieves the effect of expection, it is to increase while friction and wear behavior, and material maintains excellent tensile property, bending property.

Claims (6)

1. a Wear-resistant, high-temperature resistant nylon composite materials, is prepared from by weight by following component:

High temperature resistant nylon 65-95 part

Pretreated molybdenumdisulphide 1-15 part

Oxidation inhibitor 0.1-1.0 part

Lubricant 0.2-1.0 part;

Described pretreated molybdenumdisulphide adopts following method to prepare: being added in 5-50L dehydrated alcohol by 1-10kg molybdenumdisulphide, ultrasonic disperse is even; Ultrasonic time is 1-2 hour, ultrasonic temperature 30-50 DEG C; Then 0.1-2kg maleic anhydride is slowly added in ethanolic soln, stirs 1-2 hour, filter, with Air drying after deionized water wash, preserve.

2. a kind of Wear-resistant, high-temperature resistant nylon composite materials as claimed in claim 1, it is characterised in that, described high temperature resistant nylon is the one in nylon 46, nylon 6T, nylon 9 T.

3. a kind of Wear-resistant, high-temperature resistant nylon composite materials as claimed in claim 1, it is characterised in that, described molybdenumdisulphide, its purity >=99.9%, median size are 1.5 ��m; Described molybdenumdisulphide water content��0.05wt%.

4. a kind of Wear-resistant, high-temperature resistant nylon composite materials as claimed in claim 1, it is characterized in that, described oxidation inhibitor is four [��-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three (2,4-tert-butyl-phenyl) phosphorous acid ester be by weight the mixture being 1:1.

5. a kind of Wear-resistant, high-temperature resistant nylon composite materials as claimed in claim 1, it is characterised in that, described lubricant is at least one in barium stearate, Zinic stearas.

6. the preparation method of the described Wear-resistant, high-temperature resistant nylon composite materials of the arbitrary item of claim 1-5, it is characterised in that, adopt following step:

(1) 65-95 part high temperature resistant nylon, the pretreated molybdenumdisulphide of 1-15 part are placed in high mixer, at 80 DEG C, stir under the rotating speed of 1000 turns/min evenly; Add 0.1-1.0 part oxidation inhibitor again, 0.2-1.0 part lubricant mixes under normal temperature;

(2) joining in twin screw extruder by the raw material mixed through step (1), melting extruding pelletization, the temperature of forcing machine is 280 DEG C-320 DEG C, rate of extrusion 300r/min.