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Antimony-based compounding flame retardant masterbatch for PVC and preparation method thereof

A flame-retardant masterbatch and antimony-based technology, which is applied in the field of flame-retardant materials, can solve the problems of limited flame-retardant and smoke suppression effects, difficulty in general use, and no patents found for antimony-based flame-retardant masterbatches. Environmental protection, cost saving, and improved flame retardant effect

Inactive Publication Date: 2015-11-25
广西华锑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned antimony trioxide masterbatch only uses antimony trioxide as an inorganic flame retardant, and the flame retardant effect and smoke suppression effect are limited
Moreover, the masterbatch has strong individuality and pertinence. Different resins need to use flame-retardant masterbatches with different substrates, which is difficult to achieve universality.
However, no relevant patents have been found for antimony-based flame-retardant masterbatches for PVC resins.

Method used

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  • Antimony-based compounding flame retardant masterbatch for PVC and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh respectively according to the following proportions: 35 kg of PVC resin, 40 kg of antimony trioxide (main content over 99.6%, particle size 1.0 μm), 25 kg of molybdenum trioxide, 13 kg of montmorillonite, 8 kg of organotin, titanic acid 6 kg of ester coupling agent.

[0030] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above amount and put them into a high-speed mixer for modification. The modification temperature is 140°C, the stirring rate is 4000rpm / min, and the stirring time is 3.5h;

[0031] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into the variable frequency high-speed mixer for high-speed mixing, the speed is 3000rpm / min, and the temperature is controlled at 75°C; the uniformly mixed materials Transfer to the secondary mixing equipment, add PVC resin granules, and mix at a low speed, the rotation speed is 900rpm / min, the mixing time is 7min, and the temperature is n...

Embodiment 2

[0035] Weigh respectively according to the following proportions: 20 kg of PVC resin, 25 kg of antimony trioxide (main content over 99.6%, particle size 1.0 μm), 13 kg of molybdenum trioxide, 8 kg of montmorillonite, 3 kg of organotin, aluminate 3 kg of ester coupling agent.

[0036] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above amounts and put them into a high-speed mixer for modification. The modification temperature is 100°C, the stirring rate is 2000rpm / min, and the stirring time is 4.5h.

[0037] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into the variable frequency high-speed mixer for high-speed mixing, the speed is 2000rpm / min, and the temperature is controlled at 90°C; the uniformly mixed materials Transfer to the secondary mixing equipment, add PVC resin granules, and mix at a low speed, the speed is 6000rpm / min, the mixing time is 10min, and the temperature is not control...

Embodiment 3

[0041] Weigh respectively according to the following proportions: 28 kg of PVC resin, 32 kg of antimony trioxide (main content over 99.6%, particle size 1.0 μm), 19 kg of molybdenum trioxide, 10 kg of montmorillonite, 6 kg of organotin, titanic acid 4 kg of ester coupling agent.

[0042] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above amounts and put them into a high-speed mixer for modification. The modification temperature is 120° C., the stirring rate is 3000 rpm / min, and the stirring time is 4 hours.

[0043] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into a variable frequency high-speed mixer for high-speed mixing, the speed is 4000rpm / min, and the temperature is controlled at 60°C; the uniformly mixed materials Transfer to the secondary mixing equipment, add PVC resin granules, and mix at a low speed with a rotation speed of 1200rpm / min and a mixing time of 5min without temperat...

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Abstract

The present invention discloses an antimony-based compounding flame retardant masterbatch for PVC and a preparation method thereof, and belongs to the technical field of flame retardant materials. The masterbatch includes the following raw materials by weight: 25-40 parts of antimony trioxide, 13-25 parts of molybdenum trioxide, 8-13 parts of montmorillonite, 3-8 parts of organic tin, 3-6 parts of a coupling agent, and 20 to 35 parts of a carrier PVC resin. The flame retardant masterbatch is prepared from the steps of antimony trioxide surface modification, raw material mixing and granulation. The present invention employs antimony trioxide, molybdenum trioxide and montmorillonite and other environmentally friendly halogen-free flame retardants as a compounding flame retardant system, integrates the advantages of the system in synergistic flame retardant, and smoke suppression performance, improves the flame retardancy and smoke suppression of the compounding complex retardant masterbatch. Addition of the flame retardant masterbatch can greatly improve the limiting oxygen index of the PVC composite material and reduce the amount of smoke, and the flame retardant masterbatch has the characteristics of high flame retardancy, strong smoke suppression, no additive migration, easiness to use, and easy dispersion.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to an antimony compound flame-retardant master batch for PVC and a preparation method thereof. Background technique [0002] PVC is a polar non-crystalline polymer, which can be divided into different hard materials due to different degrees of polymerization. Since PVC itself contains chlorine, it has certain flame retardancy. Moreover, the polymer contains a considerable amount of free radicals and small molecules such as hydrogen chloride and monomeric chlorine, so that PVC and antimony oxide have a certain flame-retardant synergy, and the addition of antimony oxide can greatly improve its flame-retardant performance. However, antimony oxide flame-retardant PVC is usually flame-retardant by directly adding antimony oxide powder. The flame-retardant effect is poor, and the amount of smoke is large. The mechanical properties of composite materials hav...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/22C08K3/34C08K5/57
Inventor 王涛梁小良戴新韦华马柳军
Owner 广西华锑科技有限公司
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