Low molecular weight polyamide resin polyol and preparation method thereof

A technology of polyamide resin and low molecular weight, which is applied in the field of low molecular weight polyamide resin polyols and its preparation, can solve the problems of low activity of carboxyl groups, poor combination of advantages, high activity of amino groups, etc., and achieve the effect of wide space

Active Publication Date: 2016-08-24
ANQING HAOYE WATER PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own molecular structure, there are obstacles in its combination with other resins, especially the combination with polyurethane, because polyamide resins are polymerized from polybasic acids and diamines, and its end groups can only be carboxyl or Amino group; the activity of carboxyl group is too low, and it hardly reacts with isocyanate, while the activity of amino group is too high, and it is easy to cross-link with isocyanate, so the advantages of the two cannot be well combined

Method used

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  • Low molecular weight polyamide resin polyol and preparation method thereof

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Embodiment 1

[0013] 40g sebacic acid, 35g adipic acid, 60g dimer acid, 15g hexamethylenediamine, 10g cyclohexanediamine, 40g isopropanolamine, 30ml pyrrolidone, antioxidant triphenyl phosphite 0.5 grams. First add sebacic acid, dimer acid and adipic acid to the reactor, at 140 ° C, add hexamethylene diamine, react for 3 hours, then heat up to 180 ° C, dehydrate for 30 minutes, cool down to 130 ° C, add isopropanol amine, at the same time, triphenyl phosphite was added, and the reaction was carried out for 3 hours. During the reaction, the solvent pyrrolidone was added to control the reaction viscosity. The temperature was further heated and removed for 30 minutes, the dehydration was completed, the temperature was raised to 200° C., and a vacuum was drawn at the same time to remove unreacted monomers and solvent. After 1 hour, the reaction was completed, and the product was a light orange-yellow viscous liquid. The molecular weight is about 1400.

Embodiment 2

[0015] 50 grams of sebacic acid, 40 grams of adipic acid, 70 grams of dimer acid, 30 grams of hexamethylenediamine, 35 grams of isopropanolamine, 10 grams of ethanolamine, 40 milliliters of pyrrolidone, and 0.5 grams of triphenyl phosphite. First add sebacic acid, dimer acid and adipic acid in the reactor, at 140 ° C, add hexamethylene diamine, control the reaction temperature, react for 3 hours, heat up 180 ° C, dehydrate for 30 minutes, cool down to 130 ° C, add isopropyl Alcoholamine, ethanolamine and triphenyl phosphite were reacted for 3 hours, and the reaction viscosity was controlled by adding pyrrolidone. The temperature was raised to 190° C. for dehydration, and after 30 minutes, the temperature was raised to 200° C. and vacuumed for 1 hour. The reaction was completed, and the product was a light orange-yellow viscous liquid. The molecular weight is about 2000.

[0016] Molecular weight was determined by reaction analysis method according to HG / T2409-1992. That is, ...

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Abstract

The invention relates to a low-molecular-weight polyamide resin polyol and a preparation method thereof. The main raw materials for the preparation of the low-molecular-weight polyamide resin polyol are sebacic acid, adipic acid, succinic acid, dimer acid, hexamethylenediamine, diethylene Composed of triamine, 1,2 cyclohexanediamine, ethanolamine, isopropanolamine, antioxidant and solvent, the equivalent weight ratio of dibasic acid to dibasic amine is 4-8:1, and the ratio of alcohol amine to dimer acid The weight ratio is 1:3-6, and the amount of the antioxidant is 0.1-0.5% of the weight of the dimer acid. The low-molecular-weight polyamide resin polyol of the present invention has a hydroxyl group at its end group, has a mild reaction with polyurethane, and not only retains the basic structure of the polyamide resin, but also can be well combined with polyurethane. The preparation method of the low-molecular-weight polyamide resin polyol of the present invention mainly synthesizes the low-molecular-weight polyamide resin polyol, which can be selected and controlled in the range of molecular weight from 700 to 2000 through reasonable formula and process.

Description

technical field [0001] The invention relates to a low molecular weight polyamide resin polyol and a preparation method. Background technique [0002] Polyamide resins are widely used in synthetic fibers, adhesives, printing inks and other fields due to their excellent physical and chemical properties. However, due to its own molecular structure, there are obstacles in its combination with other resins, especially with polyurethane, because polyamide resin is polymerized with polybasic acid and diamine, and its end groups can only be carboxyl or Amino group; the activity of carboxyl group is too low, and it hardly reacts with isocyanate, while the activity of amino group is too high, and it is very easy to crosslink with isocyanate, so the advantages of the two cannot be well combined. SUMMARY OF THE INVENTION [0003] In order to solve the technical problems existing in the prior art, one of the objectives of the present invention is to provide a low molecular weight poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28C08K5/526C08G18/60
Inventor 李传宏操昭云黎群李颖陈桂斌
Owner ANQING HAOYE WATER PAINT
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