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Polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin and preparation method and application thereof

A hydroxyl resin, low viscosity technology, applied in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of difficult to meet construction requirements, complex synthesis process, high product viscosity, and achieve good solubility, High gloss, simple and easy-to-control process

Active Publication Date: 2019-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product not only has the characteristics of flame retardant and low smoke generation, but also has the properties of opening pores and hardening. However, when the solid content is 40%, the product viscosity is as high as 5000mpa.s (25°C), which is difficult to meet the construction requirements, and the synthesis process complex

Method used

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  • Polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin and preparation method and application thereof
  • Polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin and preparation method and application thereof
  • Polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) A kind of multi-hydroxyl low-viscosity mixed-arm star-shaped hydroxyl resin (SHP-1), the composition of the raw material formula is as shown in Table 1:

[0047] Table 1

[0048]

[0049] (2) The preparation technology of this multi-hydroxyl low-viscosity heteroarm star-shaped hydroxyl resin (SHP-1), comprises the following steps:

[0050] The schematic diagram of the synthesis principle of star-shaped hydroxyl resin (SHP-1) is as follows: figure 1 . Mix hexahydrophthalic anhydride and diisopropanolamine uniformly in the reactor at room temperature for 1 hour, then raise the temperature to 130°C, and react for 3 hours until the acid value reaches the theoretical acid value to obtain a matrix multi-armed star-shaped hydroxyl resin; Add cationic ring-opening catalyst boron trifluoride ethyl ether to form hydroxyl resin, add a given mass of octyl glycidyl ether dropwise at 30°C, finish dropping within 2 hours, raise the temperature to 60°C, react for 4 hours until...

Embodiment 2

[0066] (1) A kind of multi-hydroxyl low-viscosity mixed-arm star-shaped hydroxyl resin (SHP-2), the composition of the raw material formula is as shown in Table 4:

[0067] Table 4

[0068]

[0069] (2) The preparation technology of this multi-hydroxyl low-viscosity heteroarm star-shaped hydroxyl resin (SHP-2), comprises the following steps:

[0070] Mix methylhexahydrophthalic anhydride and diisopropanolamine uniformly in the reactor at room temperature and react for 1 hour, then raise the temperature to 130°C, and react for 3 hours until the acid value reaches the theoretical acid value to obtain the matrix multi-armed star-shaped hydroxyl resin; Add the cationic ring-opening catalyst boron trifluoride ethyl ether to the matrix star-shaped hydroxyl resin, add a given mass of octyl glycidyl ether and epichlorohydrin dropwise at 30 ° C, drop it within 2 hours, raise the temperature to 60 ° C, and react for 4 hours to the ring The oxygen value reaches the theoretical value ...

Embodiment 3

[0080](1) A kind of multi-hydroxyl low-viscosity mixed-arm star-shaped hydroxyl resin (SHP-3), the composition of the raw material formula is as shown in Table 7:

[0081] Table 7

[0082]

[0083] (2) The preparation technology of this multi-hydroxyl low-viscosity heteroarm star-shaped hydroxyl resin (SHP-3), comprises the following steps:

[0084] Mix phthalic anhydride and diethanolamine uniformly in the reactor and react at room temperature for 1 hour, raise the temperature to 130°C, and react for 3 hours until the acid value reaches the theoretical acid value to obtain a matrix multi-armed star-shaped hydroxyl resin; Add a cationic ring-opening catalyst to the hydroxyl resin, boron trifluoride ethanol, drop a given mass of benzyl glycidyl ether at 30°C, drop it within 1 hour, raise the temperature to 60°C, and react for 4 hours until the epoxy value reaches the theoretical value to obtain polyhydroxyl Low viscosity heteroarm star hydroxyl resin. Cooling and dischargi...

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Abstract

The invention discloses polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin and a preparation method and application thereof. The preparation method comprises the steps that after anhydrideand monohydric amine or dihydric amine are mixed in a reaction kettle and are subjected to a reaction at the normal temperature for 1-2 h, the temperature rises to 110-130 DEG C, the reaction lasts for 2-3 h, and a star-shaped hydroxyl resin substrate is obtained until an acid value is a theoretical acid value; the star-shaped hydroxyl resin substrate reacts with mono glycidyl ether for 4-6 h under the effect of a positive ion ring opening catalyst. The prepared polyhydroxy low-viscosity miktoarm star-shaped hydroxyl resin has the advantages that the synthesis steps are few, the technology issimple, and the viscosity is low, the hydroxyl value of the resin is 160-250 mg KOH / g, under the condition that the solid content is 100%, at the temperature of 25 DEG C, the viscosity of the resin is400-5,000 mpa.s, and the resin and an isocyanate curing agent can be subjected to cross-linking and curing to prepare coating of the high solid content, under the condition of the construction viscosity of the resin, the VOC content is lower than 350 g / L, and the coating performance can meet the national standard of solvent-type two-component polyurethane coating for woodware.

Description

technical field [0001] The present invention relates to a star-shaped hydroxyl resin, in particular to a method for preparing a matrix star-shaped hydroxyl resin by reacting an acid anhydride and an alcohol amine, and modifying the matrix star-shaped hydroxyl resin with a unit glycidyl ether to prepare a method for preparing a multi-hydroxyl low-viscosity heteroarm star-shaped hydroxyl resin , and its application in high solids coatings. Background technique [0002] Domestic polyurethane technology has been applied to wood for more than 60 years, and now it has accounted for more than 70% of domestic wood coatings. China has already become the largest producer of polyurethane wood coatings. However, solvent-based coatings account for 50% of the total. Due to the pressure of volatile organic matter emission restrictions, it is the general trend to study the use of high-solid polyurethane coatings. Compared with high-solid polyurethane coatings, although water-based wood coa...

Claims

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Application Information

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IPC IPC(8): C07C231/12C07C233/60C09D175/04C08G18/38
Inventor 瞿金清刘晚秋
Owner SOUTH CHINA UNIV OF TECH