Preparation of dissolvable curing agent for tripolymer of toluene diisocyanate

A technology of trimerization of toluene diisocyanate and isocyanate, which is applied in the direction of coating, can solve the problems of low dilution rate of xylene, limited wide use, poor compatibility, etc., and achieves wide applicability, saving dull powder, and high dilution rate. Effect

Inactive Publication Date: 2005-01-26
ZHUHAI FEIYANG NOVEL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. It is only suitable for matte paint, not for gloss paint, which limits its wide use;
[0008] 2. Poor compatibility, low dilution rate of xylene, when mixing paint, need to use a lot of real solvent, high cost

Method used

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  • Preparation of dissolvable curing agent for tripolymer of toluene diisocyanate
  • Preparation of dissolvable curing agent for tripolymer of toluene diisocyanate
  • Preparation of dissolvable curing agent for tripolymer of toluene diisocyanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In a tank equipped with a stirrer, thermometer and 2 In a protected 1000ml four-neck flask, add 450g of TDI, 50g of 1-butanol, and 330g of ethyl acetate, stir and heat up, and react at 70°C for 1 hour. After adding 0.080g lithium salicylate and 0.0032g stannous isooctanoate, the reaction starts exothermic, reacts at 90°C, detects the weight percentage of free NCO groups every 1 hour, when the weight percentage of NCO When the solid content was 9.6%, 0.6 g of benzoyl chloride was added immediately, and the temperature was lowered to 40° C. for discharge.

Embodiment 2

[0035] The experimental method is the same as in Example 1. In a tank equipped with a stirrer, thermometer and 2 In a protected 1000ml four-neck flask, add 375g TDI, 29g 2-butanol and 494g butyl acetate, stir and heat up, react at 60°C for 3 hours, then heat up to 80°C, add 0.12g lithium salicylate and 0.004g isooctanoic acid Stannous, react at 80°C, detect the weight percentage of free NCO groups every 1 hour, when the weight percentage of NCO is 7.5%, and its solid content is 50%, add 0.42g chloride immediately Benzoyl, cooled to 40 ℃ discharge.

Embodiment 3

[0037] The experimental method is the same as in Example 1. In a tank equipped with a stirrer, thermometer and 2 In a protected 1000ml four-neck flask, add 515g TBI, 77g n-pentanol, 100g ethyl acetate, 98g butyl acetate, stir and heat up, react at 70°C for 3.5 hours, add 0.076g lithium salicylate and 0.002g stannous isooctanoate , exothermic reaction, heat preservation reaction at 85°C, detect the weight percentage of free NCO groups every 1 hour, when the weight percentage of NCO is 11%, and its solid content is 75%, immediately add 0.52g Benzoyl chloride is cooled to 40°C and discharged.

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Abstract

A high-compatibility trimer as solidifying agent for paint is prepared from toluene diisocyanate or its mixture, ester-type solvent aliphatic alcohol and isocyanate trimer catalyst through reacting between first three under protection of N2 at 30-80 deg.C for 1-6 hr while stirring, adding the last one, reacting, cooling to 50-100 deg.C, continuous reacting until the Wt pecentage of NCO is 7.4-8.4, and polymerizing inhititor, and cooling to lower than 40 deg.C.

Description

technical field [0001] The invention relates to a preparation method of a toluene diisocyanate trimer curing agent used in the paint decoration industry. Background technique [0002] At present, the quick-drying toluene diisocyanate trimer of paint widely used in the market is realized through the following ways: [0003] <chemistry num="001"> <chem file="02149704_cml001.xml" / > < / chemistry> [0004] Taking 2,4-toluene diisocyanate as an example, the structural formula of its trimer is: [0005] [0006] Toluene diisocyanate trimer is used in matte paint to achieve the purpose of quick drying, but it has the following two disadvantages in use: [0007] 1. It is only suitable for matte paint, not for gloss paint, which limits its wide use; [0008] 2. Poor compatibility, low dilution rate of xylene, when mixing paint, need to use a lot of real solvent, high cost. Contents of the invention [0009] The object of the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/00
Inventor 肖增钧邓锦新
Owner ZHUHAI FEIYANG NOVEL MATERIALS
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