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Flame-retardant low-temperature-resistant organic silicon rubber and preparation method thereof

A technology of silicone rubber and low temperature resistance, applied in the field of silicone rubber, can solve the problems of short curing cycle, oil resistance, flame retardancy and low temperature resistance to be further improved, low curing temperature of silicone rubber, etc., and achieve low production cost. , The effect of high resilience and good compatibility

Inactive Publication Date: 2019-11-22
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent CN106751907A discloses an addition-type silicone rubber and its preparation method. The prepared silicone rubber has a low curing temperature and a short curing cycle, but the oil resistance, flame retardancy and low temperature resistance performance need to be further improved

Method used

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  • Flame-retardant low-temperature-resistant organic silicon rubber and preparation method thereof
  • Flame-retardant low-temperature-resistant organic silicon rubber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] A flame-retardant and low-temperature resistant silicone rubber, characterized in that it is made of the following raw materials in parts by weight: 60 parts of vinyl-terminated fluorosilicone rubber, N-vinyl o-phenylimine modified hyperbranched polysiloxane 30 parts, 10 parts of benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate, 10 parts of chloropropyl polysiloxane, 10 parts of aluminum oxide, 3 parts of tert-butyl peroxy tert-valerate, silane 2 parts of coupling agent KH550.

[0028] The preparation method of the described benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate comprises the following steps: dissolving benzimidazole-5,6-dicarboxylic acid, amino-terminated polyurethane and phosphonothioate in two Form a solution in methyl sulfoxide, then add the solution into the reaction kettle, replace the air in the kettle with nitrogen, react at 100°C for 4 hours under normal pressure, then raise the temperat...

Embodiment 2

[0032]A flame-retardant and low-temperature resistant silicone rubber, characterized in that it is made of the following raw materials in parts by weight: 65 parts of vinyl-terminated fluorosilicone rubber, N-vinyl o-phenylimine modified hyperbranched polysiloxane 32 parts, 11 parts of benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate, 12 parts of chloropropyl polysiloxane, 12 parts of aluminum hydroxide, 3.5 parts of dicyclohexyl peroxydicarbonate, silane 2.5 parts of coupling agent KH560.

[0033] The preparation method of the benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate comprises the following steps: dissolving benzimidazole-5,6-dicarboxylic acid, amino-terminated polyurethane and phosphorous acid in dimethyl sulfoxide Form a solution in the reaction kettle, then add the solution into the reaction kettle, replace the air in the kettle with helium, react at 102°C under normal pressure for 4.5 hours, then rais...

Embodiment 3

[0037] A flame-retardant and low-temperature resistant silicone rubber, characterized in that it is made of the following raw materials in parts by weight: 70 parts of vinyl-terminated fluorosilicone rubber, N-vinyl o-phenylimine modified hyperbranched polysiloxane 35 parts, 13 parts of benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate, 15 parts of chloropropyl polysiloxane, 15 parts of silicon micropowder, 4 parts of azobisisobutyronitrile, silane coupling agent KH570 3.5 parts.

[0038] The preparation method of the described benzimidazole-5,6-dicarboxylic acid / amino-terminated polyurethane polycondensate comprises the following steps: dissolving benzimidazole-5,6-dicarboxylic acid, amino-terminated polyurethane and thiophosphoramide in N, Form a solution in N-dimethylacetamide, then add the solution into the reaction kettle, replace the air in the kettle with neon gas, react at 105°C for 5 hours under normal pressure, then raise the temperatur...

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Abstract

The invention discloses flame-retardant and low-temperature-resistant organic silicon rubber Which is characterized in that it comprises the following raw materials in parts by weight: 60 to 80 partsof vinyl-terminated fluorosilicone rubber, 30 to 40 parts of N-vinylphthalimide modified hyperbranched polysiloxane, 10 to 15 parts of benzimidazole-5, 6-dicarboxylic acid / amino-terminated polyurethane polycondensate, 10 to 20 parts of chloropropyl polysiloxane, 10 to 20 parts of filler, 3 to 5 parts of initiator and 2 to 5 parts of coupling agent. The invention also discloses a preparation methodof the flame-retardant low-temperature-resistant organic silicon rubber. Compared with commercially available products, the flame-retardant and low-temperature-resistant organic silicon rubber disclosed by the invention is better in low temperature resistance, more excellent in wear resistance, fire resistance, flame retardance and weather resistance, higher in hardness and strength, higher in resilience and better in oil resistance.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a flame-retardant and low-temperature resistant silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber, also known as organosiloxane or silicone rubber, is widely used in construction, automobiles, electronics, new energy, etc. due to its excellent high and low temperature resistance, weather resistance, good electrical insulation, and hydrophobicity. field. With the increase in market demand and the further expansion of the scope of use, people have higher and higher requirements for the performance of silicone rubber. Therefore, it is of great significance to develop silicone rubber with excellent comprehensive performance and high functional added value. [0003] The silicone rubber in the prior art has low strength without adding reinforcing fillers and additives, and is easy to burn and forms pulverized residue after burning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08L75/04C08K3/22C08K3/36C08K3/34C08K3/38C08K9/04C08K13/06
CPCC08K2003/2227C08K2003/387C08L83/08C08L2201/02C08L2205/025C08L2205/035C08L75/04C08K3/22C08K3/36C08K13/06C08K3/346C08K3/34C08K3/38C08K9/04
Inventor 余香兰朱小红
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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