Silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating suitable for steel tube and preparation method of silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating

A technology of epoxy resin powder and epoxy resin, which is applied in the direction of epoxy resin coatings, powder coatings, fireproof coatings, etc., to achieve the effects of improved flame retardant performance, low cost, and increased thermal stability

Active Publication Date: 2015-03-25
广东一通科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of existing steel pipe surface coatings, and

Method used

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  • Silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating suitable for steel tube and preparation method of silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating
  • Silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating suitable for steel tube and preparation method of silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating
  • Silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating suitable for steel tube and preparation method of silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Preparation of chlorine-terminated polydimethylsiloxane

[0056] Under the protection of nitrogen, add 500mL of toluene, 50g of dihydroxy-terminated polydimethoxysilane, and 5g of dichlorodimethylsilane into a three-necked flask equipped with a condenser, and use lye to absorb hydrogen chloride at the gas outlet, and reflux for 3~ 5h. After the product was washed with water, the solvent was removed in a rotary evaporator, and dried to obtain chlorine-terminated polydimethylsiloxane.

[0057] 2. Preparation of silicon-phosphorus modified epoxy resin base material

[0058] Under nitrogen protection, add 500mL of toluene, 50g of epoxy resin base material BE188 (epoxy equivalent 182-192g / mol), 10g of chlorine-terminated polydimethylsiloxane into a three-necked flask equipped with a condenser, and the gas outlet Absorb hydrogen chloride with lye, use reflux reaction for 3-5 hours, absorb hydrogen chloride produced in the reaction with triethylamine, wash the product wit...

Embodiment 2

[0066] 1. To prepare chlorine-terminated polydimethylsiloxane, the method is the same as in Example 1.

[0067] 2. Preparation of silicon-phosphorus modified epoxy resin base material

[0068] Under nitrogen protection, add 500mL of toluene, 50g of epoxy resin base material BE188 (epoxy equivalent 182-192g / mol), 5g of chlorine-terminated polydimethylsiloxane, 5g of dimethicone into a three-necked flask equipped with a condenser. Chlorodimethylsilane, absorb hydrogen chloride with lye at the gas outlet, use reflux for 3-5 hours, absorb hydrogen chloride produced in the reaction with triethylamine, wash the product with water, remove the solvent in a rotary evaporator, and dry the product for 1-5 hours 3h, after re-dissolving with 500mL toluene, add 10g DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), reflux reaction for 3~5h, wash the product with water, and rotate Remove the solvent in a type evaporator, dry the product for 1-3 hours, and grind it to 100-200 mesh to...

Embodiment 3

[0076] 1. To prepare chlorine-terminated polydimethylsiloxane, the method is the same as in Example 1.

[0077] 2. Preparation of silicon-phosphorus modified epoxy resin base material

[0078] Under the protection of nitrogen, add 500mL of toluene, 80g of epoxy resin base material DER331 (epoxy equivalent 182-192g / mol), 10g of dichlorodimethylsilane into a three-necked flask equipped with a condenser, and absorb the gas outlet with lye Hydrogen chloride, use reflux reaction for 3~5h, absorb the hydrogen chloride produced in the reaction with triethylamine, wash the product with water, remove the solvent in a rotary evaporator, dry the product for 1~3h, re-dissolve with 500mL toluene, add 10g DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), reflux reaction for 3~5h, the product was washed with water and then the solvent was removed in a rotary evaporator, and the product was dried for 1~3h, Grind to 100-200 mesh to prepare silicon-phosphorus modified epoxy resin base...

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Abstract

The invention discloses a silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating suitable for a steel tube and a preparation method of the silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating. The silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating is prepared from the following components in percentage by weight: 30-80wt% of a silicon-phosphate modified epoxy resin base material, 2-10wt% of an epoxy resin curing agent containing silicon and nitrogen, 5-15wt% of a charring agent, 5-20wt% of a foaming agent, 5-20wt% of a char forming catalyst, 0.5-2wt% of a curing accelerator, 2-10wt% of pigments and fillers and 0.1-2wt% of a flow agent and is prepared by the following steps: sequentially modifying an epoxy resin base material by organic silicon and phosphorus, and then mixing the modified epoxy resin, the epoxy resin curing agent containing silicon and nitrogen, the charring agent, the foaming agent, the char forming catalyst, the curing accelerator, the pigments and the fillers and the flow agent, wherein the oxygen index of the epoxy resin after modification and curing is higher than 33. The silicon-nitrogen-phosphate coordinating flame retardant epoxy resin powder coating is sprayed on a preheated steel tube by adopting an electrostatic spraying method, and the fire-resistant time at the high temperature of 800-1000 DEG C is longer than 2h.

Description

technical field [0001] The invention relates to a flame-retardant coating. More specifically, it relates to a silicon nitrogen phosphorus synergistic flame retardant epoxy resin powder coating suitable for steel pipes and a preparation method thereof. Background technique [0002] After the steel pipe is rolled off the assembly line of the steel plant, its surface corrosion resistance is poor, and it is easily corroded during storage, transportation and use, which seriously affects its performance and service life. Once its surface is corroded, its subsequent treatment process is cumbersome and the workload is heavy. At the same time, the mechanical properties of steel pipes will decline rapidly in high temperature environments. For example, the general No. 45 steel begins to soften at 600 ° C for 0.5 hours. Therefore, taking protective measures for these steel pipes to avoid direct burning by high-temperature flames can greatly reduce damage to steel pipe parts in high-t...

Claims

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Application Information

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IPC IPC(8): C08G59/14C09D163/00C09D5/03C09D5/18C09D7/12C08G59/40C08G77/24
Inventor 吴伟国
Owner 广东一通科技股份有限公司
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