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Synthetic method for trifunctional and high-cohesive-energy flame-retardant polyol used for woodworking adhesive

A technology of flame retardant polyol and trifunctionality, which is applied in the field of synthesis of flame retardant polyol for wood glue, can solve the problems of no flame retardant performance and weak initial adhesion, and achieve the effect of excellent mechanical properties

Active Publication Date: 2019-10-25
CHONGQING HANTUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the initial adhesion of polyurethane adhesives prepared from polyester polyols currently used in woodworking polyurethane adhesives is relatively weak, and the raw materials of polyester polyols used in polyurethane adhesives on the market have no flame retardant properties. Therefore need a kind of flame retardant polyol that can improve the initial tack of woodworking polyurethane adhesive

Method used

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  • Synthetic method for trifunctional and high-cohesive-energy flame-retardant polyol used for woodworking adhesive
  • Synthetic method for trifunctional and high-cohesive-energy flame-retardant polyol used for woodworking adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: accurately weigh the adipic acid of 1730g, the hexanediol of 1150g, the three (2-hydroxyethyl) isocyanurate of 29g, the catalyst of 0.06g, the antioxidant of 0.09g, nitrogen protection, in React at a temperature of 140°C for 1 hour;

[0024] Step 2: heat up to 150°C, react for 1 hour, heat up to 167°C again, react for 1 hour, heat up again to 184°C, react for 1 hour, heat up again to 201°C, react for 1 hour, heat up again to 218°C, react for 2 hours;

[0025] Step 3: Turn on the vacuum pump connected to the reaction device, slowly increase the vacuum degree to < -0.096MPa within 2 hours, take samples regularly until the acid value of the sample is ≤2mgKOH / g, and the hydroxyl value of the sample is between 35 and 40mgKOH / g , the temperature was lowered to 180°C, the vacuum was broken with nitrogen, the temperature was lowered to 160°C, and the obtained product was discharged and packaged.

Embodiment 2

[0027] Step 1: accurately weigh the adipic acid of 1730g, the hexanediol of 1145g, the three (2-hydroxyethyl) isocyanurate of 43.5g, the catalyst of 0.12g, the antioxidant of 0.14g, nitrogen protection, React at a temperature of 140°C for 1h;

[0028] Step 2: heat up to 150°C, react for 1 hour, heat up to 167°C again, react for 1 hour, heat up again to 184°C, react for 1 hour, heat up again to 201°C, react for 1 hour, heat up again to 218°C, react for 2 hours;

[0029] Step 3: Turn on the vacuum pump connected to the reaction device, slowly increase the vacuum degree to < -0.096MPa within 2 hours, take samples regularly until the acid value of the sample is ≤2mgKOH / g, and the hydroxyl value of the sample is between 35 and 40mgKOH / g , the temperature was lowered to 180°C, the vacuum was broken with nitrogen, the temperature was lowered to 160°C, and the obtained product was discharged and packaged.

Embodiment 3

[0031] Step 1: accurately weigh the adipic acid of 1730g, the hexanediol of 1142g, the three (2-hydroxyethyl) isocyanurate of 58g, the catalyst of 0.18g, the antioxidant of 0.19g, nitrogen protection, in React at a temperature of 140°C for 1 hour;

[0032] Step 2: heat up to 150°C, react for 1 hour, heat up to 167°C again, react for 1 hour, heat up again to 184°C, react for 1 hour, heat up again to 201°C, react for 1 hour, heat up again to 218°C, react for 2 hours;

[0033] Step 3: Turn on the vacuum pump connected to the reaction device, slowly increase the vacuum degree to < -0.096MPa within 2 hours, take samples regularly until the acid value of the sample is ≤2mgKOH / g, and the hydroxyl value of the sample is between 35 and 40mgKOH / g , the temperature was lowered to 180°C, the vacuum was broken with nitrogen, the temperature was lowered to 160°C, and the obtained product was discharged and packaged.

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Abstract

The invention provides a synthetic method for trifunctional and high-cohesive-energy flame-retardant polyol used for a woodworking adhesive. The synthetic method comprises the following steps: step 1,accurately weighing adipic acid, hexanediol, tris(2-hydroxyethyl)isocyanurate, a catalyst and an antioxidant, and carrying out a reaction at 140 DEG C for 1 h under the protection of nitrogen; step 2, carrying out heating to 150 DEG C, carrying out a reaction for 1 h, carrying out heating again to 167 DEG C, carrying out a reaction for 1 h, then carrying out heating again to 184 DEG C, carrying out a reaction for 1 h, carrying out heating again to 201 DEG C, carrying out a reaction for 1 h, carrying out heating again to 218 DEG C, and carrying out a reaction for 2 h; and step 3, opening a vacuum pump connected with a reaction device, raising a vacuum degree to less than minus 0.096 MPa in 2 h, periodically carrying out sampling for detection until an acid value and a hydroxyl value of a sample meet standards, then carrying out cooling to 180 DEG C, breaking vacuum with nitrogen, carrying out cooling to 160 DEG C, and carrying out discharging and packaging so as to obtain a product. According to the invention, through introduction of the tris(2-hydroxyethyl)isocyanurate, the cohesive energy, crystallinity and wettability of a polyurethane adhesive are improved; and when the trifunctional and high-cohesive-energy flame-retardant polyol is applied to the woodworking adhesive, the initial adhesion of the polyurethane adhesive can be well improved.

Description

technical field [0001] The invention belongs to the field of flame-retardant adhesives, in particular to a method for synthesizing flame-retardant polyols for wood glue with trifunctionality and high cohesive energy. Background technique [0002] In the application field of wood glue polyurethane adhesives, polyurethane adhesives are required to have good initial adhesion properties to prevent the PVC film from warping due to insufficient initial adhesion when the polyurethane adhesive is pasted on the PVC film (commonly known as warping). Head), the application of polyurethane glue for woodworking glue is limited when sticking film, so polyurethane adhesive with good initial adhesion performance is very popular in the application field of woodworking glue. Good initial adhesion requires polyurethane adhesives to have high cohesive energy and initial crystallinity, and also requires polyurethane adhesives to have good wetting properties. [0003] Flame retardant polyols ref...

Claims

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Application Information

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IPC IPC(8): C08G63/685C09J175/06
CPCC08G63/6856C09J175/06
Inventor 罗斌张立强林欧亚李仁洪李卫朋
Owner CHONGQING HANTUO TECH CO LTD
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