阅读说明：本技术 一种用于电线电缆的高耐温tpe及其制备方法 (High-temperature-resistant TPE (thermoplastic elastomer) for wires and cables and preparation method thereof ) 是由 赵志明 洪喜军 刘军 于 2019-12-17 设计创作，主要内容包括：本发明公开的属于电线电缆技术领域,具体为一种用于电线电缆的高耐温TPE及其制备方法,该用于电线电缆的高耐温TPE的原料包括SEBS、白矿油、共聚PP、聚乙烯、聚烯烃弹性体、聚苯醚、磷氮阻燃剂、有机硅酮母粒、主抗氧剂和辅抗氧剂,该用于电线电缆的高耐温TPE的制备方法的具体步骤如下：S1：制备充油SEBS；S2：向充油SEBS中加入其它原料；S3：将混合原料挤出成型,增塑剂白矿油选用聚a烯烃基础油,抗老化性能突出,PP耐高温但热老化性能不好；免辐照交联,高耐温、无卤高效阻燃、机械性能好,热塑性可回收。(The invention belongs to the technical field of wires and cables, and particularly relates to a high-temperature-resistant TPE (thermoplastic elastomer) for wires and cables and a preparation method thereof, wherein the raw materials of the high-temperature-resistant TPE for the wires and cables comprise SEBS (styrene-ethylene-butadiene-styrene), white mineral oil, copolymerized PP (polypropylene), polyethylene, a polyolefin elastomer, polyphenyl ether, a phosphorus-nitrogen flame retardant, an organic silicone master batch, a main antioxidant and an auxiliary antioxidant, and the preparation method of the high-temperature-resistant TPE for the wires and cables comprises the following specific steps: s1: preparing oil-extended SEBS; s2: adding other raw materials into the oil-extended SEBS; s3: extruding and molding the mixed raw materials, wherein the plasticizer white mineral oil is selected from poly-alpha olefin base oil, so that the aging resistance is outstanding, and PP is high-temperature resistant but poor in thermal aging resistance; radiation crosslinking is avoided, high temperature resistance is achieved, halogen-free efficient flame retardant is achieved, mechanical properties are good, and thermoplasticity can be recycled.)

1. The utility model provides a high temperature resistant TPE for wire and cable which characterized in that: the high-temperature-resistance TPE for the wires and cables comprises SEBS, white mineral oil, copolymerized PP, polyethylene, polyolefin elastomer, polyphenyl ether, phosphorus-nitrogen flame retardant, organic silicone master batch, main antioxidant and auxiliary antioxidant;

the high-temperature-resistant TPE for the electric wire and the cable comprises the following raw materials in percentage by mass: SEBS (20-30), white mineral oil (15-20), copolymerized PP (5-10), polyethylene (3-5), polyolefin elastomer (3-5), polyphenyl ether (10), phosphorus-nitrogen flame retardant (30), organic silicone master batch (1-3), main antioxidant (0.1-0.3) and auxiliary antioxidant (0.1-0.3).

2. The TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the SEBS is resin powder G1654 with weight-average molecular weight of 80000-150000.

3. The TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the white mineral oil is naphthenic white mineral oil KN4010, and preferably poly-a olefin base oil PAO-8 with a flash point of 220-250 ℃.

4. The TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the phosphorus-nitrogen flame retardant is a blend of diethyl aluminum hypophosphite, melamine cyanurate and melamine cyanurate, wherein the mass proportion of the diethyl aluminum hypophosphite, the melamine cyanurate and the melamine cyanurate is 1: 1: 1.

5. the TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the organic silicone master batch particles are high molecular weight siloxane master batches, wherein the carrier is polyolefin, the preferable carrier is polypropylene, and the molecular weight of siloxane is 80-120 ten thousand.

6. The TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the main antioxidant is one of tetra [ methylene-3, 5- (di-tert-butyl-4-hydroxy-phenyl) acrylate ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite.

7. The TPE for electric wire and cable according to claim 1, wherein the TPE is characterized in that: the auxiliary antioxidant is N, N' -bis [ [3- (3, 5) -di-tert-butyl-4-hydroxyphenyl ] propionyl ] hexanediamine.

8. A method for preparing the high temperature-resistant TPE for electric wires and cables according to any one of claims 1 to 7, is characterized in that: the preparation method of the high-temperature-resistant TPE for the electric wires and cables comprises the following specific steps:

s1: preparing oil-filled SEBS, namely stirring the SEBS and the softening plasticizer in a mixer at the stirring speed of 300-600rpm/min for 2-5 minutes to obtain the oil-filled SEBS;

s2: adding other raw materials into oil-extended SEBS: adding other raw materials and auxiliaries into the oil-extended SEBS obtained in the step S1, and blending for 30min to obtain a mixed raw material;

s3: extruding and molding the mixed raw materials: adding the mixed raw materials into an extruder, and performing melt blending extrusion.

Technical Field

The invention relates to the technical field of electric wires and cables, in particular to a high-temperature-resistant TPE (thermoplastic elastomer) for electric wires and cables and a preparation method thereof.

Background

The wire and cable is used for transmitting electric (magnetic) energy, information and wire products for realizing electromagnetic energy conversion. A wire cable in a broad sense, also referred to as a cable for short, refers to an insulated cable, which can be defined as: an aggregate consisting of; one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.

At present, the standards of the domestic charging pile are not unified, irradiation crosslinking polyvinyl chloride is selected for use in a charging wire sheath layer, although the high temperature resistance is improved through irradiation crosslinking, the proportion of a finished product is high, the irradiation step is complicated, the processing cost is high, and the environment is not protected. The sheath chooses crosslinked polyethylene's electric wire hardness height for use, and electric automobile is in the charging process, and connecting cable is inconvenient at the car with fill the direct round trip movement of electric pile.

Disclosure of Invention

The invention aims to provide a high-temperature-resistant TPE (thermoplastic elastomer) for wires and cables and a preparation method thereof, and aims to solve the problems that irradiation crosslinking polyvinyl chloride is selected in a sheath layer of a charging wire provided by the background art, and although the high-temperature resistance is improved through irradiation crosslinking, the finished product has high specific gravity, complicated irradiation steps, high processing cost and no environmental protection. Crosslinked polyethylene's electric wire hardness is high for the sheath to choose, and electric automobile is in the charging process, and connecting cable is at the car and fill the direct inconvenient problem of round trip movement of electric pile.

In order to achieve the purpose, the invention provides the following technical scheme: the high-temperature-resistance TPE for the electric wires and cables comprises SEBS, white mineral oil, copolymerized PP, polyethylene, polyolefin elastomer, polyphenyl ether, phosphorus-nitrogen flame retardant, organic silicone master batch, main antioxidant and auxiliary antioxidant;

the high-temperature-resistant TPE for the electric wire and the cable comprises the following raw materials in percentage by mass: SEBS (20-30), white mineral oil (15-20), copolymerized PP (5-10), polyethylene (3-5), polyolefin elastomer (3-5), polyphenyl ether (10), phosphorus-nitrogen flame retardant (30), organic silicone master batch (1-3), main antioxidant (0.1-0.3) and auxiliary antioxidant (0.1-0.3).

Preferably, the SEBS is village resin powder G1654 with the weight-average molecular weight of 80000-150000.

Preferably, the white mineral oil is naphthenic white mineral oil KN4010, and the preferred flash point is poly-a olefin base oil PAO-8 with the temperature of 220-.

Preferably, the phosphorus-nitrogen flame retardant is a blend of diethyl aluminum hypophosphite, melamine cyanurate, and melamine cyanurate, wherein the mass specific gravity of the diethyl aluminum hypophosphite, the melamine cyanurate, and the melamine cyanurate is 1: 1: 1.

preferably, the organosilicone master batch particles are high-molecular-weight siloxane master batches, wherein the carrier is polyolefin, the preferred carrier is polypropylene, and the molecular weight of siloxane is 80-120 ten thousand.

Preferably, the main antioxidant is one of tetrakis [ methylene-3, 5- (di-tert-butyl-4-hydroxy-phenyl) acrylate ] pentaerythritol ester and tris [2, 4-di-tert-butylphenyl ] phosphite.

Preferably, the secondary antioxidant is N, N' -bis [ [3- (3, 5) -di-tert-butyl-4-hydroxyphenyl ] propionyl ] hexanediamine.

A preparation method of high-temperature-resistant TPE for wires and cables comprises the following specific steps:

s1: preparing oil-filled SEBS, namely stirring the SEBS and the softening plasticizer in a mixer at the stirring speed of 300-600rpm/min for 2-5 minutes to obtain the oil-filled SEBS;

s2: adding other raw materials into oil-extended SEBS: adding other raw materials and auxiliaries into the oil-extended SEBS obtained in the step S1, and blending for 30min to obtain a mixed raw material;

s3: extruding and molding the mixed raw materials: adding the mixed raw materials into an extruder, and performing melt blending extrusion.

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

1) the white mineral oil plasticizer is poly-alpha olefin base oil, so that the aging resistance is outstanding, and PP has high temperature resistance but poor thermal aging resistance;

2) radiation crosslinking is avoided, high temperature resistance is achieved, halogen-free efficient flame retardant is achieved, mechanical properties are good, and thermoplasticity can be recycled.

Drawings

FIG. 1 is a flow chart of the preparation process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the present invention provides a technical solution: the high-temperature-resistance TPE for the electric wires and cables comprises SEBS, white mineral oil, copolymerized PP, polyethylene, polyolefin elastomer, polyphenyl ether, phosphorus-nitrogen flame retardant, organic silicone master batch, main antioxidant and auxiliary antioxidant;

the high-temperature-resistant TPE for the electric wire and the cable comprises the following raw materials in percentage by mass: SEBS (20-30), white mineral oil (15-20), copolymerized PP (5-10), polyethylene (3-5), polyolefin elastomer (3-5), polyphenyl ether (10), phosphorus-nitrogen flame retardant (30), organic silicone master batch (1-3), main antioxidant (0.1-0.3) and auxiliary antioxidant (0.1-0.3).

SEBS is hydrogenated styrene-ethylene-butadiene-styrene copolymer, and resin powder G1654 with weight average molecular weight of 80000-150000 is selected.

The white mineral oil is naphthenic white mineral oil KN4010, and preferably poly-a olefin base oil PAO-8 with a flash point of 220-250 ℃.

The copolymerized PP is selected from 7633,3015;

the polyethylene is High Density Polyethylene (HDPE), 7260 polyolefin elastomer (POE), and Exxon Mobil 6102;

the phosphorus-nitrogen flame retardant is a blend of diethyl aluminum hypophosphite, melamine cyanurate and melamine cyanurate, wherein the mass proportion of the diethyl aluminum hypophosphite, the melamine cyanurate and the melamine cyanurate is 1: 1: 1.

the organosilicone master batch particles are high molecular weight siloxane master batches, wherein the carrier is polyolefin, the preferable carrier is polypropylene, and the molecular weight of siloxane is 80-120 ten thousand.

The main antioxidant is one of tetra [ methylene-3, 5- (di-tert-butyl-4-hydroxy-phenyl) acrylate ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite.

The auxiliary antioxidant is N, N' -bis [ [3- (3, 5) -di-tert-butyl-4-hydroxyphenyl ] propionyl ] hexanediamine.

A preparation method of high-temperature-resistant TPE for wires and cables comprises the following specific steps:

s1: preparing oil-filled SEBS, namely stirring the SEBS and the softening plasticizer in a mixer at the stirring speed of 300-600rpm/min for 2-5 minutes to obtain the oil-filled SEBS;

s2: adding other raw materials into oil-extended SEBS: adding other raw materials and auxiliaries into the oil-extended SEBS obtained in the step S1, and blending for 30min to obtain a mixed raw material;

s3: extruding and molding the mixed raw materials: adding the mixed raw materials into an extruder, and performing melt blending extrusion.

The proportions of the raw materials of comparative examples 1, 2 and examples 1, 2, 3 are as follows:

fruit of Chinese wolfberry

The test results are as follows:

from the experimental results, it can be seen that the synthetic base oil has excellent aging resistance, and as the number of parts of PP decreases, the number of parts of SEBS increases, the elongation at break increases after aging, and the aging resistance of example 1 is the best.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

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.