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Flame-retardant silicone rubber heat-shrinkable sleeve and preparation method thereof

A heat-shrinkable sleeve and silicone rubber technology, used in tubular articles, other household appliances, applications, etc., can solve the problems of small shrinkage ratio, unstable shrinkage performance, poor flame retardancy, etc., and achieve a large shrinkage ratio and stable shrinkage performance. , good flame retardant performance

Inactive Publication Date: 2017-02-15
苏州沃尔兴电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the heat-shrinkable sleeve has the defects of poor fla

Method used

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  • Flame-retardant silicone rubber heat-shrinkable sleeve and preparation method thereof
  • Flame-retardant silicone rubber heat-shrinkable sleeve and preparation method thereof
  • Flame-retardant silicone rubber heat-shrinkable sleeve and preparation method thereof

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preparation example Construction

[0030] The invention provides a flame-retardant silicone rubber heat-shrinkable sleeve and a preparation method thereof. The constituent materials of the flame-retardant silicone rubber heat-shrinkable sleeve include: polyorganosiloxane, thermoplastic resin, white carbon black, inert filler, Flame retardant, curing agent, is characterized in that:

[0031] The ratio of the constituent materials of the flame-retardant silicone rubber heat-shrinkable sleeve is: by weight parts,

[0032]

[0033] The organopolyorganosiloxane may be a liquid or a highly viscous substance, preferably having a viscosity of 103 to 108 mm2 / s at 25°C.

[0034] The specific surface area of ​​the silica is at least 50m 2 / g; the silica is fumed silica or precipitated silica or a mixture of the two; the silica is hydrophilic or hydrophobic silica or a mixture of the two.

[0035] The inert filler is one or a mixture of titanium oxide, aluminum oxide, talcum powder and mica powder.

[0036] The flame...

Embodiment approach 1

[0048] Take 100 parts of polymethylvinyl siloxane, 30 parts of white carbon black, 50 parts of phenyl silicone resin, 50 parts of titanium dioxide, 40 parts of aluminum hydroxide and add 1.2% of 2,4-dichloroperoxide to the silica gel mixture Benzoyl, according to the preparation method of the above-mentioned flame-retardant silicone rubber heat-shrinkable sleeve, the flame-retardant silicone rubber heat-shrinkable sleeve is obtained;

[0049] Material properties: Tensile strength: 12MPa

[0050] Elongation at break: 260%

[0051] Oxygen index: 28

[0052] Tear strength: 23

Embodiment approach 2

[0054] Take 100 parts of polymethylphenyl vinyl siloxane, 50 parts of white carbon black, 40 parts of phenyl silicone resin, 50 parts of silicon micropowder, 50 parts of zinc borate, 1 part of platinum flame retardant and add 1.2% of silicone rubber mixture 2,4-dichlorobenzoyl peroxide, according to the preparation method of the above-mentioned flame-retardant silicone rubber heat-shrinkable sleeve to make flame-retardant silicone rubber heat-shrinkable sleeve;

[0055] Material properties: Tensile strength: 11MPa

[0056] Elongation at break: 270%

[0057] Oxygen index: 32

[0058] Tear strength: 20KN / m

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Abstract

The invention discloses a flame-retardant silicone rubber heat-shrinkable sleeve and a preparation method thereof. The raw materials of the heat-shrinkable sleeve comprise (A) polyorganosiloxane having at least two alkenyl groups, (B) a thermoplastic resin or a mixture of several thermoplastic resins, (C) fumed silica or precipitated white carbon black or a mixture thereof having the specific surface area of at least 50 m<2>/g, (D) inorganic filler, (E) a fire retardant and (F) a curing agent. The raw materials except the curing agent (F) are uniformly mixed in a vacuum kneading machine, and then the mixture is subjected to heating and vacuumizing to obtain a silicone rubber mixture; the curing agent (F) is added in an open mill and extruding, vulcanizing and shaping are performed, and then the silicone rubber tube is expanded at the heating condition, and under the expanded condition, the silicone rubber tube is cooled and shaped under the normal temperature condition, so as to obtain the silicone rubber sleeve with the heat shrinkage function. The silicone rubber heat shrinkage sleeve is easy to process, the flame retardance of the silicone rubber heat-shrinkable sleeve is good, and the shrinkage is very good.

Description

technical field [0001] The invention relates to the field of heat-shrinkable sleeve technical equipment, in particular to a flame-retardant silicone rubber heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] Ordinary rubber heat-shrinkable tubing is made by blending thermoplastic resin and rubber. Commonly used are polyethylene / ethylene-vinyl acetate copolymer / EPDM rubber blend radiation cross-linked heat-shrinkable Isoprene / ethylene-vinyl acetate copolymer blend radiation crosslinking heat shrinkable material, ethylene-vinyl acetate copolymer / silicone rubber blend radiation crosslinkable heat shrinkable material, etc. [0003] Silicone rubber has good high temperature aging resistance, and silicone rubber still has excellent rubber elasticity in low temperature environment. The characteristic of high temperature resistance and low temperature resistance at the same time is the biggest characteristic of silicone rubber that distinguishes i...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08L23/06C08L27/06C08L31/04C08L33/12C08L25/06C08L23/12C08K13/02C08K3/36C08K3/22C08K3/34C08K3/38C08K5/14B29D23/00
Inventor 金家骏
Owner 苏州沃尔兴电子科技有限公司
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