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Reinforced toughened self-lubricating polyformaldehyde composite material and preparation method thereof

A composite material and polyoxymethylene technology, which is applied in the field of reinforcing and toughening self-lubricating polyoxymethylene composite materials and their preparation, can solve problems such as the reduction of tensile strength, and achieve the effects of good wear resistance, uniform dispersion and good processing and forming performance.

Active Publication Date: 2012-07-11
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1546564A discloses the properties and preparation method of polyoxymethylene and thermoplastic polyurethane blend modification. Although the elongation at break and Charpy notched impact strength of the composition are improved, the tensile strength is much lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Dry 10% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100°C for 2-4h;

[0040] (2) Add the dried TPEE to the high-speed mixer, add 70% homopolymer POM, 4% polytetrafluoroethylene, 5% glass fiber, 0.6% antioxidant, 0.8% formaldehyde absorbent, 0.4% surface lubrication Agent, 0.2% coupling agent and 1% compatibilizer were mixed at room temperature for 15-20min;

[0041] (3) Add the mixed material obtained in step (2) into the extruder, add 8% zinc oxide whiskers through the vent hole on the twin-screw extruder, extrude and granulate, and injection molding.

[0042] The temperature of each zone of the extruder is: 140°C, 160-170°C, 170-185°C, 180-195°C, 180-195°C, 180-195°C, head temperature 185-195°C, screw speed 200-500 rpm / minute. After the produced particles are dried at 100°C for 3 hours, they are injection-molded with an injection molding machine, the temperature of the barrel is 160-200°C, and the mold tempera...

Embodiment 2

[0044] (1) Dry 20% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100°C for 2-4h;

[0045] (2) Add the dried TPEE to the high-speed mixer, add 55% homopolymer POM, 5% polytetrafluoroethylene, 15% glass fiber, 0.6% antioxidant, 0.6% formaldehyde absorbent, 0.4% surface lubrication Agent, 0.1% coupling agent and 2% compatibilizer were mixed at room temperature for 15-20min;

[0046] (3) Add the compound obtained in step (2) into the extruder, add 1.3% zinc oxide whiskers through the vent holes on the twin-screw extruder, extrude and granulate, and then injection mold.

[0047] The temperature of each zone of the extruder is: 140~150℃, 160~170℃, 170~185℃, 180~195℃, 180~195℃, 180~195℃, head temperature 185~195℃, screw speed 200- 500 rpm. After the produced particles are dried at 100°C for 3 hours, they are injection-molded with an injection molding machine, the temperature of the barrel is 160-200°C, and the mold temperature is 40...

Embodiment 3

[0049] (1) Dry 30% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100°C for 2-4h;

[0050] (2) Add the dried TPEE to the high-speed mixer, add 45% homopolymer POM, 6% polytetrafluoroethylene, 10% glass fiber, 0.6% antioxidant, 0.5% formaldehyde absorbent, 0.4% surface lubrication Agent, 0.2% coupling agent and 2% compatibilizer were mixed at room temperature for 15-20min;

[0051](3) Add the mixture obtained in step (2) into the extruder, add 5.3% zinc oxide whiskers through the vent hole on the twin-screw extruder, extrude and granulate, and then injection mold.

[0052] The temperature of each zone of the extruder is: 140~150℃, 160~170℃, 170~185℃, 180~195℃, 180~195℃, 180~195℃, head temperature 185~195℃, screw speed 200- 500 rpm. After the produced particles are dried at 100°C for 3 hours, they are injection-molded with an injection molding machine, the temperature of the barrel is 160-200°C, and the mold temperature is 40-10...

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Abstract

The invention discloses a reinforced toughened self-lubricating polyformaldehyde composite material and a preparation method thereof, belonging to the field of polymer materials and molding processing thereof. The polyformaldehyde composite material disclosed by the invention comprises the following components in percent by weight: 45-70 percent of POM (Polyoxymethylene), 10-30 percent of TPEE (Thermoplastic Polyether Ester Elastomer), 4-6 percent of polytetrafluoroethylene, 5-15 percent of glass fiber, 0.2-1 percent of antioxygen, 0.5-0.8 percent of formaldehyde absorbing agent, 0.3-0.5 percent of surface lubricating agent, 1-8 percent of zinc oxide whiskers, 0.1-0.2 percent of coupling agent and 1-2 percent of compatilizer. The polyformaldehyde composite material is prepared by adopting the method comprising the steps of: drying 10-30 percent of TPEE at a temperature of 100 DEG C for 2-4h; adding the dried TPEE in a high-speed mixing machine, adding the 45-70 percent of POM, the 4-6 percent of polytetrafluoroethylene, the 5-15 percent of glass fiber, the 0.2-1 percent of antioxygen, the 0.5-0.8 percent of formaldehyde absorbing agent, the 0.3-0.5 percent of surface lubricating agent, the 0.1-0.2 percent of coupling agent and the 1-2 percent of compatilizer for mixing for 15-20min at a room temperature; and adding a mixture obtained in the last step into an extruder, adding the 1-8 percent of zinc oxide whiskers from an exhaust hole on the dual-screw extruder, extruding and granulating, and injection-molding. The composite material provided by the invention has the advantages of dispersing uniformity, good mechanical property and better abrasion resistance.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding processing, and in particular relates to a reinforced and toughened self-lubricating polyoxymethylene composite material and a preparation method thereof. Background technique [0002] Polyoxymethylene resin (POM) is a linear weak polar polymer containing methylene oxide in the main chain. It has no side chains, high melting point, high crystallinity, and has excellent comprehensive properties. It is known as "super steel". Or "Sai Steel". POM has the hardness, rigidity and strength similar to metal, and has good self-lubrication and fatigue resistance in a wide range of temperature and humidity. It has been widely used in aviation, machinery, precision instruments, automobiles, electronic appliances It is one of the five general-purpose engineering plastics. Although POM has excellent comprehensive properties, its high crystallinity makes it poor in impact strength, high in no...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08L59/04C08L67/02C08L27/18C08K13/04C08K7/14C08K7/08B29B9/06B29C45/78B29C47/92B29C48/92
CPCB29C48/04
Inventor 郭雪晴
Owner HEFEI GENIUS NEW MATERIALS
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