CN1528819A

CN1528819A - PTFE modified polyphenylene sulfide composite material and pelleting process thereof

Info

Publication number: CN1528819A
Application number: CNA2003101117052A
Authority: CN
Inventors: 林良云
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-09
Filing date: 2003-10-09
Publication date: 2004-09-15

Abstract

The invention is polytetrafluoroethylene polyphenyl thioether compound material, the weight percentage of each ingredient is: polyphenyl thioether 45-55%, glass fiber 35-47%, polytetrafluoroethylene 5-9%, assistant 0.5-2%, fillers 0-2%. The invention also discloses the prilling process of the compound material. The product in the invention has high rigidity, corrosion resistance, and low creep deformation, low friction coefficient, high abradability.

Description

Polytetrafluoroethylmodified modified polyphenyl thioether composite material and granulation process thereof

Technical field

The present invention relates to polytetrafluoroethylmodified modified polyphenyl thioether composite material and granulation process method thereof.

Background technology

Polyphenylene sulfide (hereinafter being abbreviated as " PPS ") is the linear crystalline thermoplastic resin that has thiophenyl in the molecular backbone chain, and this resin is a kind of special engineering plastics of excellent performance.Its Good Heat-resistance, heat-drawn wire surpasses 260 ℃, and the life-time service temperature is 220-240 ℃; Mechanical property is good, and rigidity is extremely strong, and surface hardness is big, and has excellent creep resistant and resistance to fatigue; Corrosion-resistant, chemical proofing is excellent, even be dissolved in any solvent below 170 ℃ hardly; Electrical property is good, even still have good electrical property under high temperature, high humidity, high frequency; Flame retardant resistance is the UL94V-0 level; Dimensional stability is good, and molding shrinkage is little.But, because a large amount of phenyl ring has increased the polymer chain rigidity on the PPS main chain, make that its performance is crisp, impelling strength is not high, thereby in application, be subjected to certain restriction.Glass fibre strengthens PPS higher impact property, bending property and extension performance.But the frictional coefficient of PPS is higher, reaches 0.45-0.57, and wear hardness is poor, is used in mechanical component, and for example bearing aspect effect is relatively poor.

Tetrafluoroethylene (being called for short PTFE) is a perfluorination straight chain superpolymer, and product surface is transparent or opaque shape, has high molecular weight, is the thermoplastic polymer of high-crystallinity.Because its chain structure is the very strong fluorine carbon bond of bond energy, make it have high thermostability and excellent dielectric properties, best chemical resistance, and property such as frictional coefficient is very low.In the mechanical component field, utilize the PTFE frictional coefficient minimum, kinetic friction coefficient and static friction coefficient are very near (only being 0.08-0.1), and The friction coefficient load increases and the characteristics of reduction under low speed, be widely used as bearing, particularly Nonlubricated bearing slide block etc.But PTFE has two big shortcomings: the one, and the cost height, the 2nd, can not injection molding, limit its use range.

Summary of the invention

Technical problem to be solved by this invention: a kind of both had high rigidity, corrosion-resistant, high temperature resistant, low creep are provided, have the polytetrafluoroethylmodified modified diphenyl sulfide matrix material that frictional coefficient is little, abrasion are low again.

Another technical problem to be solved by this invention: the granulation process method that above-mentioned matrix material is provided.

The present invention solves the technical scheme that its technical problem adopts:

Polytetrafluoroethylmodified modified diphenyl sulfide matrix material, its component and content (weight percent) are:

Polyphenylene sulfide 45-55%

Glass fibre 35-47%

Tetrafluoroethylene 5-9%

Auxiliary agent 0.5-2%

Wherein auxiliary agent comprises polyolefine grafted maleic anhydride phase solvent, oxidation inhibitor, lubricant and coupling agent;

Described oxidation inhibitor is hydroxy phenyl acrylate or hydroxybenzene methacrylic ester; Described lubricant is hard ester acid; Described coupling agent is a γ-An Bingjisanyiyangjiguiwan;

Can add in the described component≤filler of 2% weight percent, described filler is wollastonite, kaolin or talcum powder.

The granulation process of polytetrafluoroethylmodified modified polyphenyl thioether composite material, its step comprises:

(1). polytetrafluoroethylene powder is added polyolefine grafted maleic anhydride phase solvent, and stirring is placed in the baking oven 100 ℃ and handled 2 hours, forms the A component,

(2). with polyphenylene sulfide resin cosmetics, A component, after homogenizer mixes, add coupling agent, oxidation inhibitor, lubricant again, make compound,

(3). above compound is added twin screw extruder, melt extrude,

(4). in extrusion, add glass fibre,

(5). through the cold water pelletizing.

When wherein step (2) adds coupling agent, oxidation inhibitor, lubricant, add filler.

Beneficial effect of the present invention:

1, owing to added poly-tetrafluoro tetraene in the fiberglass enhanced polyphenyl thioether, its frictional coefficient reduces, wear resistance strengthens.

2, granulation process method of the present invention is simple.

Embodiment:

Embodiment 1-9 (following component content unit be weight percentage)

		Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Embodiment 6	Embodiment 7	Embodiment 8	Embodiment 9	Comparative Examples	Inspecting standard
		Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Embodiment 6	Embodiment 7	Embodiment 8	Embodiment 9	Comparative Examples	Inspecting standard	Component	PPS	??50％	??50％	??50％	??45％	??45％	??45％	??55％	??55％	??55％	??50％
Glass fibre	??42％	??40％	??40％	??47％	??45％	??45％	??37％	??35％	??35％	??45％				PPS	??50％	??50％	??50％	??45％	??45％	??45％	??55％	??55％	??55％	??50％
Glass fibre	??42％	??40％	??40％	??47％	??45％	??45％	??37％	??35％	??35％	??45％		Filler		??2％	??2％		??2％	??1％		??2％	??2％		??4％
Tetrafluoroethylene	??5％	??7％	??9％	??5％	??7％	??9％	??5.5％	??7％	??9％			Filler		??2％	??2％		??2％	??1％		??2％	??2％		??4％
Tetrafluoroethylene	??5％	??7％	??9％	??5％	??7％	??9％	??5.5％	??7％	??9％			Auxiliary agent		??1％	??1％	??1％	??1％	??2％	??1％	??0.5％	??1％	??1％	??1％
Performance	Vertical combustion (level)	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	Auxiliary agent		??1％	??1％	??1％	??1％	??2％	??1％	??0.5％	??1％	??1％	??1％		??GB/T2408- ?????96
	Vertical combustion (level)	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	??FV-0	Heat-drawn wire (℃)	??260	??265	??268	??258	??260	??263	??260	??265	??270	??258	??GB1634-79		??GB/T2408- ?????96
	Density (g/cm ³)	??1.6	??1.57	??1.55	??1.60	??1.60	??1.60	??1.52	??1.52	??1.50	??1.65	Heat-drawn wire (℃)	??260	??265	??268	??258	??260	??263	??260	??265	??270	??258	??GB1634-79	??GB1033-86
	Density (g/cm ³)	??1.6	??1.57	??1.55	??1.60	??1.60	??1.60	??1.52	??1.52	??1.50	??1.65	Kinetic friction coefficient	??0.3	??0.25	??0.2	??0.3	??0.25	??0.2	??0.3	??0.25	??0.2	??0.45	??GB5478-85	??GB1033-86

Illustrate: 1. the filler embodiment in the table 1,4,7 is wollastonite, and embodiment 2,5 is a kaolin, and embodiment 8 is a talcum powder, and Comparative Examples is a wollastonite.

2. auxiliary agent is polyolefine grafted maleic anhydride phase solvent, oxidation inhibitor, lubricant, coupling agent in the table; Wherein oxidation inhibitor is that hydroxy phenyl acrylate, lubricant are that hard ester acid, coupling agent are γ-An Bingjisanyiyangjiguiwan.

Embodiment 10

A kind of polytetrafluoroethylmodified modified polyphenyl thioether composite material granulation process method,

1. get tetrafluoroethylene 3.5Kg, polyolefine grafted maleic anhydride 200g stirs, and puts into baking oven and handles 2 hours for 100 ℃; Form the A component,

2. get polyphenylene sulfide resin cosmetics 25Kg, A component 3.7Kg, put into high speed mixer and stir, 1500 rev/mins of kinds of stirring velocity, churning time is 3 minutes, in stirring material, add oxidation inhibitor hydroxybenzene methacrylic ester 100g again, the hard ester acid of lubricant 100g, filler talcum powder 1kg, silane coupling agent 100g, stir, 300 rev/mins of stirring velocitys, the time is 1 minute

3. above Preblend is added in the twin screw extruder, the setting processing condition of forcing machine are as follows: temperature 275-290 ℃, and the 1-10 section, screw speed: 1100 rev/mins, 250 rev/mins of feeding machine rotating speeds,

4. add the 20kg glass fibre at the 5th section charging opening,

5. discharge port adopts the pelletizing of cold rinse bank tie rod, is cut into the polytetrafluoroethylmodified modified polyphenyl thioether composite material 50kg of 5-6mm.

Polytetrafluoroethylmodified modified polyphenyl thioether composite material of the present invention is as heat-resisting, corrosion-resistant, high rigidity, high-wearing feature material, possess external five large-engineering plastics (PPO, POM, PC, PBT, PA) over-all properties, be widely used in fields such as electronics, electrical equipment, machinery and precision instrument, auto parts parts.

Claims

1. polytetrafluoroethylmodified modified diphenyl sulfide matrix material, its component and content (weight percent) are:

Polyphenylene sulfide 45-55%

Glass fibre 35-47%

Tetrafluoroethylene 5-9%

Auxiliary agent 0.5-2%

Wherein, auxiliary agent comprises polyolefine grafted maleic anhydride phase solvent, oxidation inhibitor, lubricant and coupling agent.

2. polytetrafluoroethylmodified modified polyphenyl thioether composite material according to claim 1 is characterized in that: described oxidation inhibitor is hydroxy phenyl acrylate or hydroxybenzene methacrylic ester; Described lubricant is hard ester acid; Described coupling agent is a γ-An Bingjisanyiyangjiguiwan.

3. polytetrafluoroethylmodified modified polyphenyl thioether composite material according to claim 1 and 2 is characterized in that: can add in the described component≤filler of 2% (weight percent), described filler is wollastonite, kaolin or talcum powder.

4. according to the granulation process of each described polytetrafluoroethylmodified modified polyphenyl thioether composite material of claim 1-3, its step comprises:

(1). polytetrafluoroethylene powder is added polyolefine grafted maleic anhydride phase solvent, stir to be placed in the baking oven and handled 2 hours, form the A component,

(3). above compound is added twin screw extruder, melt extrude,

(4). in extrusion, add glass fibre,

(5). through the cold water pelletizing.

5. the granulation process of polytetrafluoroethylmodified modified polyphenyl thioether composite material according to claim 4 is characterized in that: when step (2) adds coupling agent, oxidation inhibitor, lubricant, add filler.