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One-component titanate halogen-free flame-retardant silicone sealant

A technology of one-part titanate and sealant, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as unsatisfactory storage stability, improve storage stability and yellowing resistance, Effect of improving compatibility and improving storage stability

Active Publication Date: 2018-10-19
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained one-component silicone transparent sealant has good storage stability, but its storage stability still cannot meet the requirements in practical applications

Method used

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  • One-component titanate halogen-free flame-retardant silicone sealant
  • One-component titanate halogen-free flame-retardant silicone sealant
  • One-component titanate halogen-free flame-retardant silicone sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A one-component titanate halogen-free flame-retardant silicone sealant, which is mainly prepared from the following raw materials in parts by weight:

[0056]

[0057]

[0058] Wherein, the catalyst is a mixture of a primary titanium catalyst and a secondary titanium catalyst, and the primary titanium catalyst is tetra-tert-butyl titanate, and the secondary titanium catalyst is silicon titanate prepared by reacting isopropyl titanate with hydroxyl silicone oil. Oxyalkyl ester catalyst, and the mass ratio of primary titanium catalyst and secondary titanium catalyst is 0.5:1. The viscosity of polydimethylsiloxane terminated by trimethoxysilane at the end is 4000cps, the viscosity of polydimethylsiloxane terminated by methyldimethoxysilane at the end is 5000cps, and the crosslinking agent is methyl orthosilicate, The halogen-free flame retardant filler is silicone resin flame retardant, the viscosity of polydimethylsilicone oil is 50cps, the fumed silica is hydrophil...

Embodiment 2

[0061] A one-component titanate halogen-free flame-retardant silicone sealant, which is mainly prepared from the following raw materials in parts by weight:

[0062]

[0063] Wherein, the catalyst is a mixture of a primary titanium catalyst and a secondary titanium catalyst, and the primary titanium catalyst is tetraisopropyl titanate, and the secondary titanium catalyst is made by reacting isopropyl titanate with hydroxyl silicone oil The siloxane titanate catalyst, and the mass ratio of the primary titanium catalyst to the secondary titanium catalyst is 4:1. The viscosity of polydimethylsiloxane end-capped by trimethoxysilane is 80000cps, the viscosity of polydimethylsiloxane end-capped by methyldimethoxysilane is 65000cps, and the crosslinking agent is methyltrimethoxysilane It is a mixture with vinyltrimethoxysilane, the halogen-free flame retardant filler is polysiloxane flame retardant, the viscosity of polydimethylsilicone oil is 2000cps, and the fumed silica is hydr...

Embodiment 3

[0066] A silicone sealant, which is mainly prepared from the following raw materials in parts by weight:

[0067]

[0068]Wherein, the catalyst is a mixture of a primary titanium catalyst and a secondary titanium catalyst, wherein the primary titanium catalyst is a mixture of tetra-tert-butyl titanate and tetraisopropyl titanate, and the secondary titanium catalyst is obtained through isopropyl titanate A siloxane titanate catalyst prepared by the reaction of ester and hydroxy silicone oil, and the mass ratio of the primary titanium catalyst to the secondary titanium catalyst is 0.5:1. The viscosity of the end-trimethoxysilane-terminated polydimethylsiloxane is 10000cps, the viscosity of the end-methyldimethoxysiloxane-terminated polydimethylsiloxane is 30000cps, and the crosslinking agent is vinyltriethoxy Silane, halogen-free flame retardant filler is a mixture of sodium hydroxide, phosphate ester and melamine, the viscosity of polydimethylsilicone oil is 100cps, the fume...

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Abstract

The invention provides a single-component titanate halogen-free flame-retardant organic silicone sealant. The organic silicone sealant is mainly prepared from, by weight, 0-50 (not including 0) parts of polydimethylsiloxane with the end capped with trimethoxy silane, 50-100 parts of polydimethylsilane with the end capped with methyl dimethoxy silica, 0.1-6 parts of catalyst, 1-6 parts of cross-linking agent, 30-60 parts of halogen-free flame-retardant filler, 5-20 parts of polydimethicone, 5-15 parts of gas phase method silicon dioxide and 0.1-3 parts of tackifier. The organic silicone sealant has excellent adhesive properties, yellowing resistance and storage stability, can be cured quickly, has good flame retardance with the flame-retardant rating reaching UL94-V0 and also has the advantage of being free of pollution during production; the shear strength is larger than or equal to 3.5 Mpa, and when the organic silicone sealant is stored at the temperature of 25 DEG C or below, the product guarantee period can be as long as 13 months; the organic silicone sealant can be widely applied to bonding of components of electronic and electric devices.

Description

technical field [0001] The invention belongs to the technical field of silicone sealant, and relates to a one-component titanate halogen-free flame-retardant silicone sealant. Background technique [0002] Silicone sealant has been widely used in various fields of the national economy due to its heat resistance, cold resistance, aging resistance, moisture resistance and convenient use. Silicone sealant has deacidification type, dealcoholization type and deketoxime type. Type, deacidification type and deketoxime type RTV-1 transparent silicone rubber technology has been very mature. The deacidified silicone rubber will release acidic small molecules, which are corrosive to metal objects and produce a pungent sour taste; the deketoxime silicone rubber is corrosive to copper and will crack when bonded to PC. The problem limits the application range of deacidified and deketoxime type RTV-1 transparent silicone rubber. The dealcoholized sealant has the advantages of neutrality,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J183/14C09J183/04C09J11/04C09J11/06C09J11/08
CPCC08L2201/02C08L2201/22C08L2205/02C08L2205/035C09J11/04C09J11/06C09J11/08C09J183/06C09J183/14C08L83/04C08L83/06C08K13/02C08K3/36C08K5/544C08K5/521C08K3/22C08K5/34922
Inventor 张彬欧阳国涛陈军孙鹏翁祝强尹邦志
Owner 兆舜科技(广东)有限公司
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