CN111234397A

CN111234397A - High-flame-retardance high-heat-resistance MPP (modified Polypropylene) pipe and preparation method thereof

Info

Publication number: CN111234397A
Application number: CN202010029778.0A
Authority: CN
Inventors: 容健辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-06-05

Abstract

The invention discloses a high-flame-retardance and high-heat-resistance MPP (modified polypropylene) pipe which comprises the following raw materials in parts by weight: 10-12 parts of brominated epoxy resin, 12-14 parts of tetrabromobisphenol A, 18-22 parts of modified polypropylene, 6-8 parts of talcum powder, 10-12 parts of brucite powder, 14-16 parts of ethyl silicon resin, 8-10 parts of chitosan, 25-30 parts of deionized water, 10-12 parts of zinc oxide, 8-12 parts of magnesium silicide and 7-9 parts of antioxidant, and the invention relates to the technical field of MPP pipes. This MPP tubular product and preparation method of high fire-retardant high heat-resistant, through adding brominated epoxy resin and tetrabromobisphenol A in the preparation material of MPP pipe, the cooperation of these two kinds of bromine system flame retardant materials uses and accounts for absolute advantage in fire-retardant effect, can prevent that the MPP pipe from taking place fire-retardant phenomenon under overheated environment, through the interpolation of ethyl silicon resin and resin magnesium silicide, make the MPP pipe have the high melting point, possess good heat resistance, rethread chitosan's supplementary batching, make tubular product have antibiotic and corrosion-resistant characteristics, make the MPP pipe accord with the needs of electric power engineering technique.

Description

High-flame-retardance high-heat-resistance MPP (modified Polypropylene) pipe and preparation method thereof

Technical Field

The invention relates to the technical field of MPP pipes, in particular to a high-flame-retardant and high-heat-resistant MPP pipe and a preparation method thereof.

Background

The MPP pipe is also called MPP power cable protection pipe and is divided into an excavation type and a non-excavation type, the MPP non-excavation pipe is also called MPP jacking pipe or a dragging pipe, the MPP pipe adopts modified polypropylene as main raw material, has the characteristics of high temperature resistance and external pressure resistance, is suitable for high-voltage transmission line cable calandria pipe below 10KV, does not need to dig a large amount of mud, dig soil and destroy the road surface, laying pipelines, cables and other construction projects in special sections such as roads, railways, buildings, riverbeds and the like, compared with the traditional trenching and pipe burying method, the trenchless power pipe engineering is more suitable for the current environmental protection requirement, the disturbing factors such as dust flying, traffic jam and the like caused by the traditional construction are removed, the technology can also lay pipelines in regions where excavation operation cannot be carried out, such as historic preservation areas, downtown areas, crop and farmland preservation areas, expressways, rivers and the like.

The MPP pipe has played the important role in power technology, and in the use of reality, the MPP pipe is in the higher environment of temperature, and its heat resistance still remains to be improved, easily appears easily and easily fires the phenomenon, has influenced the normal use of follow-up MPP pipe, has caused economic cost's loss, also has certain potential safety hazard simultaneously, does not conform to power technology's use needs.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a high-flame-retardant high-heat-resistant MPP pipe and a preparation method thereof, and solves the problems that the heat resistance of the MPP pipe is still to be improved in a high-temperature environment, the subsequent normal use of the MPP pipe is influenced, and the economic cost is lost.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a high fire-retardant high heat-resistant MPP tubular product, through adding brominated epoxy resin and tetrabromobisphenol A in the preparation material at the MPP pipe, the cooperation of these two kinds of bromine flame retardant materials is used and is accounted for absolute advantage at fire-retardant effect, can prevent that the MPP pipe from taking place fire-retardant phenomenon under overheated environment, through the interpolation of ethyl silicone resin and resin magnesium silicide, make the MPP pipe have the high melting point, possess good heat resistance, rethread chitosan's supplementary batching, make tubular product have antibiotic and corrosion-resistant characteristics, make the MPP pipe accord with the needs of electric power engineering technique, its raw materials include according to parts by weight: 10-12 parts of brominated epoxy resin, 12-14 parts of tetrabromobisphenol A, 18-22 parts of modified polypropylene, 6-8 parts of talcum powder, 10-12 parts of brucite powder, 14-16 parts of ethyl silicone resin, 8-10 parts of chitosan, 25-30 parts of deionized water, 10-12 parts of zinc oxide, 8-12 parts of magnesium silicide and 7-9 parts of antioxidant.

Preferably, the raw materials comprise the following components: 10 parts of brominated epoxy resin, 12 parts of tetrabromobisphenol A, 18 parts of modified polypropylene, 6 parts of talcum powder, 10 parts of brucite powder, 14 parts of ethyl silicone resin, 8 parts of chitosan, 25 parts of deionized water, 10 parts of zinc oxide, 8 parts of magnesium silicide and 7 parts of antioxidant.

Preferably, the raw materials comprise the following components: 11 parts of brominated epoxy resin, 13 parts of tetrabromobisphenol A, 20 parts of modified polypropylene, 7 parts of talcum powder, 11 parts of Brucite powder, 15 parts of ethyl silicone resin, 9 parts of chitosan, 28 parts of deionized water, 11 parts of zinc oxide, 10 parts of magnesium silicide and 8 parts of antioxidant, wherein the Brucite is Brucite (Mg (OH)2 which is a single crystal in a thick plate shape and is a common lamellar aggregate; sometimes fibrous aggregates are formed, known as nesquehonite (nemalite) or nesquehonite asbestos, which also often forms the illusion of periclase.

Preferably, the raw materials comprise the following components: 12 parts of brominated epoxy resin, 14 parts of tetrabromobisphenol A, 22 parts of modified polypropylene, 8 parts of talcum powder, 12 parts of brucite powder, 16 parts of ethyl silicone resin, 10 parts of chitosan, 30 parts of deionized water, 12 parts of zinc oxide, 12 parts of magnesium silicide and 9 parts of antioxidant, wherein the zinc oxide is a common chemical additive, is widely applied to the manufacture of products such as plastics, silicate products, synthetic rubber, lubricating oil, paint coating, ointment, adhesive, food, batteries, flame retardant and the like, has larger energy band gap and exciton constraint energy and high transparency and excellent normal-temperature luminous performance, is applied to products such as liquid crystal displays, thin film transistors, light-emitting diodes and the like in the semiconductor field, and besides, the micro-particle zinc oxide also plays a role in related fields as a nano material, and the deionized water is nearly pure water obtained by removing ionic impurities in the water through ion exchange resin, whether the design of the production device is reasonable or not is directly related to the quality of the deionized water and the economical efficiency of operation.

Preferably, the magnesium silicide is a light purple powder.

Preferably, the chitosan is a product of natural polysaccharide chitin with partial acetyl removed, the chitin, the chitosan and the cellulose have similar chemical structures, the cellulose is hydroxyl at the C2 position, the chitin and the chitosan are respectively replaced by an acetamido and an amino at the C2 position, the chitin and the chitosan have a plurality of unique properties such as biodegradability, cell affinity and biological effect, and particularly the chitosan containing free amino is the only basic polysaccharide in the natural polysaccharide.

Preferably, the zinc oxide is hexagonal crystal and is an oxide of zinc.

The invention also discloses a preparation method of the MPP pipe with high flame retardance and high heat resistance, which comprises the following steps:

s1, placing the modified polypropylene, the brominated epoxy resin, the tetrabromobisphenol and the brucite powder into a high-speed stirrer for stirring and mixing, heating the temperature in the stirrer to 80-100 ℃, continuing stirring and mixing for 40-50min, setting the stirring speed to be 700 plus materials at 800r/min, obtaining a first mixture, and waiting for standby;

s2, placing talcum powder, ethyl silicone resin, chitosan, zinc oxide and magnesium silicide into a high-speed mixer, heating to 120 ℃ for 100-1.5 h, uniformly mixing, adding an antioxidant into the mixer, continuing mixing for 20-30min, stopping stirring, keeping the temperature and the pressure for 10-15min under the condition that the pressure is 9-12MPa, taking out the material after the mixing is finished, and obtaining a second mixture for later use;

s3, placing the first mixture obtained in the S1 and the second mixture obtained in the S2 into a high-speed mixer for blending, heating and stirring to 120-140 ℃, stopping stirring, cooling the materials to 50-60 ℃ and obtaining a final mixed material;

s4, extruding and granulating the final mixed material obtained in the S3 through a double-screw extruder, setting the temperature of a first area of a machine barrel to be 180-fold 200 ℃, the temperature of a second area to be 190-fold 210 ℃, the temperature of a third area to be 200-fold 220 ℃, the temperature of a fourth area to be 210-fold 230 ℃, and the rotating speed of a screw of the extruder to be 120-fold 150r/min, and finally obtaining the MPP pipe through a die.

(III) advantageous effects

The invention provides a high-flame-retardant high-heat-resistant MPP pipe and a preparation method thereof. The method has the following beneficial effects: the high-flame-retardant high-heat-resistance MPP pipe and the preparation method thereof are characterized in that modified polypropylene, brominated epoxy resin, tetrabromobisphenol and brucite powder are placed into a high-speed stirrer for stirring and mixing through S1, the temperature inside the stirrer is increased to 80-100 ℃, then stirring and mixing are continued for 40-50min, the stirring speed is set to be 700 plus materials at 800r/min, and a first mixture is obtained for standby; s2, placing talcum powder, ethyl silicone resin, chitosan, zinc oxide and magnesium silicide into a high-speed mixer, heating to 120 ℃ for uniformly mixing at the temperature of 100-1.5 h, adding an antioxidant into the mixer, continuing mixing for 20-30min, stopping stirring, keeping the temperature and the pressure for 10-15min under the condition that the pressure is 9-12MPa, taking out the material after the mixing is finished, and waiting for standby application; s3, placing the first mixture obtained in the S1 and the second mixture obtained in the S2 into a high-speed mixer for blending, heating and stirring to 120-140 ℃, stopping stirring, cooling the materials to 50-60 ℃ and obtaining a final mixed material; s4, extruding and granulating the final mixed material obtained in the S3 through a double-screw extruder, setting the temperature of a first zone of a machine barrel to be 180-plus-200 ℃, the temperature of a second zone to be 190-plus-210 ℃, the temperature of a third zone to be 200-plus-220 ℃, the temperature of a fourth zone to be 210-plus-230 ℃, the rotating speed of a screw of the extruder to be 120-plus-150 r/min, and finally obtaining the MPP pipe through a die, brominated epoxy resin and tetrabromobisphenol A are added into the preparation material of the MPP pipe, the coordination of the two brominated flame retardant materials has absolute advantage in flame retardant action, can prevent the MPP tube from generating flame retardant phenomenon in an overheating environment, and through the addition of ethyl silicon resin and resin magnesium silicide, the MPP pipe has high melting point and good heat resistance, and then is prepared by the auxiliary ingredients of chitosan, the pipe has the characteristics of antibiosis and corrosion resistance, and the MPP pipe meets the requirements of the electric power engineering technology.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides three technical schemes: a high flame-retardant and high heat-resistant MPP pipe and a preparation method thereof specifically comprise the following embodiments:

example one

S1, placing 18 parts of modified polypropylene, 10 parts of brominated epoxy resin, 12 parts of tetrabromobisphenol A and 10 parts of brucite powder into a high-speed stirrer for stirring and mixing, heating the temperature in the stirrer to 80 ℃, continuing stirring and mixing for 40min, setting the stirring speed to 700r/min, and obtaining a first mixture for later use;

s2, putting 6 parts of talcum powder, 14 parts of ethyl silicone resin, 8 parts of chitosan, 10 parts of zinc oxide and 8 parts of magnesium silicide into a high-speed mixer, heating to 100 ℃, uniformly mixing for 1 hour, adding 7 parts of antioxidant into the mixer, continuously mixing for 20 minutes, stopping stirring, keeping the temperature and the pressure for 10 minutes under the condition that the pressure is 9MPa, taking out the materials after the operation is finished, and waiting for standby application;

s3, putting the first mixture obtained in the S1 and the second mixture obtained in the S2 into a high-speed mixer for blending, heating and stirring to 120 ℃, stopping stirring, cooling the materials to 50 ℃ and obtaining a final mixed material;

and S4, extruding and granulating the final mixed material obtained in the step S3 through a double-screw extruder, setting the temperature of a first area of a machine barrel to be 180 ℃, the temperature of a second area to be 190 ℃, the temperature of a third area to be 200 ℃, the temperature of a fourth area to be 210 ℃, and the rotating speed of a screw of the extruder to be 120r/min, and finally obtaining the MPP pipe through a die.

Example two

S1, placing 20 parts of modified polypropylene, 11 parts of brominated epoxy resin, 13 parts of tetrabromobisphenol A and 11 parts of brucite powder into a high-speed stirrer for stirring and mixing, heating the temperature in the stirrer to 90 ℃, continuing stirring and mixing for 45min, and setting the stirring speed to 750r/min to obtain a first mixture for later use;

s2, putting 7 parts of talcum powder, 15 parts of ethyl silicone resin, 9 parts of chitosan, 11 parts of zinc oxide and 10 parts of magnesium silicide into a high-speed mixer, heating to 110 ℃, uniformly mixing under 1.2h, adding 8 parts of antioxidant into the mixer, continuously mixing for 25min, stopping stirring, keeping the temperature and the pressure for 12min under the condition that the pressure is 10MPa, taking out the materials after the mixing is finished, and waiting for standby application;

s3, putting the first mixture obtained in the S1 and the second mixture obtained in the S2 into a high-speed mixer for blending, heating and stirring to 130 ℃, stopping stirring, cooling the materials to 55 ℃, and obtaining a final mixed material;

and S4, extruding and granulating the final mixed material obtained in the step S3 through a double-screw extruder, setting the temperature of a first area of a machine barrel to be 190 ℃, the temperature of a second area to be 200 ℃, the temperature of a third area to be 210 ℃, the temperature of a fourth area to be 220 ℃, and the rotating speed of a screw of the extruder to be 130r/min, and finally obtaining the MPP pipe through a die.

EXAMPLE III

S1, placing 22 parts of modified polypropylene, 12 parts of brominated epoxy resin, 14 parts of tetrabromobisphenol A and 12 parts of brucite powder into a high-speed stirrer for stirring and mixing, heating the temperature in the stirrer to 100 ℃, continuing stirring and mixing for 50min, setting the stirring speed to be 800r/min, obtaining a first mixture, and waiting for standby;

s2, putting 8 parts of talcum powder, 16 parts of ethyl silicone resin, 10 parts of chitosan, 12 parts of zinc oxide and 12 parts of magnesium silicide into a high-speed mixer, heating to 120 ℃, uniformly mixing for 1.5h, adding 9 parts of antioxidant into the mixer, continuing mixing for 30min, stopping stirring, keeping the temperature and the pressure for 15min under the condition of 12MPa, taking out the material after the mixing is finished, and obtaining a second mixture for later use;

and S4, extruding and granulating the final mixed material obtained in the step S3 through a double-screw extruder, setting the temperature of a first area of a machine barrel to be 200 ℃, the temperature of a second area to be 210 ℃, the temperature of a third area to be 220 ℃, the temperature of a fourth area to be 230 ℃, and the rotating speed of a screw of the extruder to be 150r/min, and finally obtaining the MPP pipe through a die.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high resistant MPP tubular product of heat-resisting of high fire-retardant which characterized in that: the raw materials comprise the following components in parts by weight: 10-12 parts of brominated epoxy resin, 12-14 parts of tetrabromobisphenol A, 18-22 parts of modified polypropylene, 6-8 parts of talcum powder, 10-12 parts of brucite powder, 14-16 parts of ethyl silicone resin, 8-10 parts of chitosan, 25-30 parts of deionized water, 10-12 parts of zinc oxide, 8-12 parts of magnesium silicide and 7-9 parts of antioxidant.

2. The high flame retardant high heat resistant MPP pipe material of claim 1, wherein: the raw materials comprise the following components: 10 parts of brominated epoxy resin, 12 parts of tetrabromobisphenol A, 18 parts of modified polypropylene, 6 parts of talcum powder, 10 parts of brucite powder, 14 parts of ethyl silicone resin, 8 parts of chitosan, 25 parts of deionized water, 10 parts of zinc oxide, 8 parts of magnesium silicide and 7 parts of antioxidant.

3. The high flame retardant high heat resistant MPP pipe material of claim 1, wherein: the raw materials comprise the following components: 11 parts of brominated epoxy resin, 13 parts of tetrabromobisphenol A, 20 parts of modified polypropylene, 7 parts of talcum powder, 11 parts of brucite powder, 15 parts of ethyl silicone resin, 9 parts of chitosan, 28 parts of deionized water, 11 parts of zinc oxide, 10 parts of magnesium silicide and 8 parts of antioxidant.

4. The high flame retardant high heat resistant MPP pipe material of claim 1, wherein: the raw materials comprise the following components: 12 parts of brominated epoxy resin, 14 parts of tetrabromobisphenol A, 22 parts of modified polypropylene, 8 parts of talcum powder, 12 parts of brucite powder, 16 parts of ethyl silicone resin, 10 parts of chitosan, 30 parts of deionized water, 12 parts of zinc oxide, 12 parts of magnesium silicide and 9 parts of antioxidant.

5. The high flame retardant, high heat resistant MPP pipe material of any one of claims 1-4, wherein: the magnesium silicide is a light purple powder.

6. The high flame retardant, high heat resistant MPP pipe material of any one of claims 1-4, wherein: the chitosan is a product of natural polysaccharide chitin with partial acetyl removed.

7. The high flame retardant, high heat resistant MPP pipe material of any one of claims 1-4, wherein: the zinc oxide is hexagonal crystal and is an oxide of zinc.

8. The high flame retardant, high heat resistant MPP pipe material of any one of claims 1-4, wherein: the preparation method specifically comprises the following steps: