Polyolefin silane crosslinking catalyst master batch and preparation method thereof for room temperature crosslinking

A technology of cross-linking catalyst and polyolefin silane, which is applied in the field of plastic particles and their preparation, can solve the problems of poor reliability and uniformity of cross-linking, long boiling time or sauna time, and difficulty in meeting the requirements of cross-linking degree. Continuity and reliability, avoiding boiling or sauna cross-linking procedures, preventing localized over-cross-linking effects

Inactive Publication Date: 2014-12-24
WUXI JAKE PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, a silane crosslinking catalyst masterbatch is added when using silane crosslinking cable materials for production. The common catalyst masterbatch is difficult to catalyze the alkoxylation of silane grafted polyolefin materials due to its low catalytic efficiency at room temperature. Hydrolysis reaction occurs and cross-linking occurs, so it is still necessary to provide high-temperature and high-humidity cross-linking environmental conditions. Generally, it is necessary to build a large heatable pool or a large steam sauna room for cables to be boiled, and the time for boiling or sauna It is long, occupies a large area, consumes a lot of energy, and is not conducive to continuous production; in particular, due to the addition of a large amount of flame retardants in flame-retardant silane cross-linked cable materials, its cross-linking reliability and The uniformity is poor, showing that the physical properties are unstable, and the degree of cross-linking is difficult to meet the requirements, etc., and some flame-retardant silane cross-linked cable materials are not suitable for long-term cross-linking treatment in high temperature and high humidity environment, otherwise it will reduce Comprehensive performance

Method used

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  • Polyolefin silane crosslinking catalyst master batch and preparation method thereof for room temperature crosslinking
  • Polyolefin silane crosslinking catalyst master batch and preparation method thereof for room temperature crosslinking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First choose the polyolefin elastomer of 80 parts by weight; The ethylene-vinyl acetate copolymer resin of 20 parts by weight; The crosslinking catalyst of 0.1 parts by weight; The anti-precrosslinking agent of 0.5 parts by weight; The antioxidant of 2 parts by weight; parts of processing aids.

[0019] Then, put the polyolefin elastomer and ethylene-vinyl acetate copolymer resin in a high-speed mixer, and stir at a high speed until the temperature is not lower than 80°C;

[0020] After that, add the cross-linking catalyst into the high-speed mixer and stir for 3 to 5 minutes;

[0021] After that, put the anti-precrosslinking agent, antioxidant and processing aid into the high-speed mixer and continue stirring for 3 to 5 minutes;

[0022] Finally, the above-mentioned stirred materials are fed into a twin-screw mixing extruder with four temperature zones by a feeder, extruded into granules, and dried to obtain a polyolefin silane cross-linking catalyst parent for room t...

Embodiment 2

[0032] First choose the polyolefin elastomer of 90 parts by weight; The ethylene-vinyl acetate copolymer resin of 10 parts by weight; The crosslinking catalyst of 0.3 parts by weight; The anti-precrosslinking agent of 1.0 parts by weight; The antioxidant of 4 parts by weight; parts of processing aids.

[0033] Then, put the polyolefin elastomer and ethylene-vinyl acetate copolymer resin in a high-speed mixer, and stir at a high speed until the temperature is not lower than 80°C;

[0034] After that, add the cross-linking catalyst into the high-speed mixer and stir for 3 to 5 minutes;

[0035] After that, put the anti-precrosslinking agent, antioxidant and processing aid into the high-speed mixer and continue stirring for 3 to 5 minutes;

[0036] Finally, the above-mentioned stirred materials are fed into a twin-screw mixing extruder with four temperature zones by a feeder, extruded into granules, and dried to obtain a polyolefin silane cross-linking catalyst parent for room t...

Embodiment 3

[0046]First choose the polyolefin elastomer of 85 parts by weight; The ethylene-vinyl acetate copolymer resin of 15 parts by weight; The crosslinking catalyst of 0.5 parts by weight; The anti-precrosslinking agent of 1.5 parts by weight; The antioxidant of 6 parts by weight; parts of processing aids.

[0047] Then, put the polyolefin elastomer and ethylene-vinyl acetate copolymer resin in a high-speed mixer, and stir at a high speed until the temperature is not lower than 80°C;

[0048] After that, add the cross-linking catalyst into the high-speed mixer and stir for 3 to 5 minutes;

[0049] After that, put the anti-precrosslinking agent, antioxidant and processing aid into the high-speed mixer and continue stirring for 3 to 5 minutes;

[0050] Finally, feed the above-mentioned stirred material into a twin-screw mixing extruder with four temperature zones, extrude it into granules, and obtain a polyolefin silane cross-linking material for room temperature cross-linking after ...

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Abstract

The invention relates to a polyolefin silane crosslinking catalyst master batch and a preparation method thereof for room temperature crosslinking. The preparation method is characterized in that a high-velocity stirrer is used for mixing and stirring polyolefin elastomers, ethylene-vinyl acetate copolymer resins, crosslinking catalyst, pre-crosslinking preventing agents, antioxygen and processing aids, a double screw mixer-extruder performs extrusion to form granules, and the polyolefin silane crosslinking catalyst master batch for room temperature crosslinking can be obtained. The polyolefin silane crosslinking catalyst master batch is wide in application range and applicable to flame retardant or non-flame-retardant polyolefin silane crosslinked cable materials, extrusion molding is easy, catalytic activity is high within the wide temperature range, silane can be rapidly catalyzed under the normal temperature to be grafted with alkoxy of a polyolefin material to lead to hydrolysis reaction and crosslinking can be promoted to occur, the crosslinking process is rapid and stable, and reliability and continuity are good.

Description

technical field [0001] The invention relates to a plastic particle and a preparation method thereof. Specifically, it is a polyolefin silane crosslinking catalyst masterbatch for room temperature crosslinking and a preparation method thereof. technical background [0002] Silane cross-linked cable compound is a commonly used cross-linked material. It is easy to operate and is not limited by the structure of the cable. It is widely used in the wire and cable industry. Generally, a silane crosslinking catalyst masterbatch is added when using silane crosslinking cable materials for production. The common catalyst masterbatch is difficult to catalyze the alkoxylation of silane grafted polyolefin materials due to its low catalytic efficiency at room temperature. Hydrolysis reaction occurs and cross-linking occurs, so it is still necessary to provide high-temperature and high-humidity cross-linking environmental conditions. Generally, it is necessary to build a large heatable poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/134C08K5/524C08J3/24B29C47/92B29C48/92
CPCC08L23/0815B29C48/92C08J3/24C08L2203/202C08L2205/02C08L2205/03C08L23/0853C08L23/06C08K5/57C08K5/098C08K5/09
Inventor 祁建强游泳
Owner WUXI JAKE PLASTIC
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