Preparation method of low-acid-value low-viscosity dimer acid type polyamide hot melt adhesive

A technology of polyamide hot-melt adhesive and dimer acid type, which is applied in the direction of adhesives, etc., can solve problems such as the difficulty in producing high-quality, low-acid value, low-viscosity dimer acid-type polyamide hot-melt adhesive products, and achieve low operating costs , High product yield and easy process operation

Inactive Publication Date: 2013-05-22
江苏永林油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current technology is still difficult to meet the requirements for the production of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] Add 630g of high-purity dimer acid, 4g of stearic acid, 76g of sebacic acid, and 40g of piperazine in a four-necked flask with a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet tube, start stirring and heating, and the stirring speed Control 300n / min, when the temperature rises to 130°C, add 0.6g of catalyst phosphoric acid, 0.6g of defoamer, start to drop (50g of ethylenediamine, 50g of polyetheramine D-400, 60g of polyetheramine D-2000) and mix Liquid, the temperature rise rate is controlled at 25-35°C / h, the system is slightly positive pressure at 1050Pa, the water vapor is condensed and discharged out of the system, and the water separation reaction is carried out at 160-180°C for about 120 minutes, then continue to heat up slowly, when the temperature reaches 235- At 245°C, heat the reaction for about 60 minutes. Turn off the nitrogen, turn on the vacuum pump, depressurize and evacuate, control the vacuum degree to 740mmHg, slowly raise the temp...

example 2

[0048]Add 555g of high-purity dimer acid, 3g of stearic acid, 91g of sebacic acid, and 40g of piperazine in a four-necked flask with a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet pipe, start stirring and heating, and the stirring speed Control 300n / min, when the temperature rises to 130°C, add catalyst phosphoric acid 0.6g, defoamer 0.6g, start to drop (ethylenediamine 56g, polyetheramine D-400 50g, polyetheramine D-2000 60g) and mix Liquid, the temperature rise rate is controlled at 25-35°C / h, the system has a slight positive pressure of 1050Pa, the water vapor is condensed and discharged out of the system, and the water separation reaction is carried out at 160-180°C for about 120 minutes, then continue to heat up slowly, when the temperature reaches 235- At 245°C, heat the reaction for about 60 minutes. Turn off the nitrogen, turn on the vacuum pump, depressurize and evacuate, control the vacuum degree to 740mmHg, slowly raise the temperature to 250°...

example 3

[0050] Add 558g of high-purity dimer acid, 91g of sebacic acid, and 40g of piperazine into a four-necked flask with a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet pipe, start stirring and heating, and control the stirring speed at 300n / min. When the temperature rises to 130°C, add 0.6g of catalyst phosphoric acid and 0.6g of defoamer, and start to add (52g of ethylenediamine, 50g of polyetheramine D-400, 60g of polyetheramine D-2000) dropwise, and control the rate of temperature rise 25~35℃ / h, the micro positive pressure of the system is 1050Pa, the water vapor is condensed and discharged out of the system, the water separation reaction is carried out at 160~180℃ for about 120 minutes, and then the temperature continues to rise slowly. When the temperature reaches 235~245℃, the insulation reaction 60 minutes or so. Turn off the nitrogen, turn on the vacuum pump, depressurize and evacuate, control the vacuum degree to 740mmHg, slowly raise the temperature...

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PUM

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Abstract

The invention provides a preparation method of low-acid-value low-viscosity dimer acid type polyamide hot melt adhesive, belonging to the technical field of amidation polymerization in oil chemistry. The method comprises the following steps of: carrying out acylation polymerization reaction in the presence of a catalyst and a deforming agent under the protection of nitrogen based on long-chain dimer acid of binary acid and diamine as main raw materials; and further carrying out vacuum dehydration and demonomerization to obtain dimer acid type polyamide hot melt adhesives of different specifications, wherein the acid value is lower than 2mgKOH/g, the amine value is lower than 10mgKOH/g, and the viscosity is 300-5,000cp. The preparation method provided by the invention is a new way of comprehensive utilization of dimer acid, and has the characteristics of easy technical operation, high product yield, stable product quality and low operation cost.

Description

technical field [0001] The invention relates to a preparation method of a dimer acid type polyamide hot-melt adhesive with low acid value and low viscosity. It belongs to the field of oleochemical polymer material industry and hot melt adhesive. Background technique [0002] Dimer acid type polyamide solid resin is an important hot melt adhesive base material, which is obtained by equimolar condensation polymerization of dimer fatty acid and amine compound. Often referred to as dimer acid polyamide hot melt adhesive. This type of hot melt adhesive has good strength and toughness, and most of its properties are better than other types of hot melt adhesives. Dimer acid type polyamide hot melt adhesive has the characteristics of excellent flexibility, low temperature resistance, oil resistance, excellent dielectric properties and good adhesion to various materials. The dimer acid type polyamide hot melt adhesive synthesized by piperazine and polyether amine has a chain segme...

Claims

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Application Information

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IPC IPC(8): C09J177/06C08G69/40
Inventor 钟民强徐建彬
Owner 江苏永林油脂科技有限公司
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