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Hyperbranched epoxy resin as well as preparation method and application thereof in coating

A technology of epoxy resin and epoxy equivalent, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of unfavorable application, inability to effectively form high cross-linking density paint film, single epoxy functional group, etc.

Active Publication Date: 2015-05-20
LANGFANG NIPPON PAINT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the epoxy resins currently on the market have a functionality between 2 and 4, and generally only have a single epoxy functional group, which cannot effectively form a paint film with high crosslinking density, and also has high viscosity, which is not conducive to application. defect

Method used

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  • Hyperbranched epoxy resin as well as preparation method and application thereof in coating
  • Hyperbranched epoxy resin as well as preparation method and application thereof in coating
  • Hyperbranched epoxy resin as well as preparation method and application thereof in coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Boltorn H4001-HHPA-E188-30% Synthesis (30% of the hydroxyl groups of hyperbranched hydroxyl polyester Boltorn H4001 are replaced by epoxy groups)

[0085] (1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.3 mole of hexahydrophthalic anhydride to a four-necked flask with a stirrer, a thermometer and a condenser, start stirring and heat up to 130°C, and 130℃ insulation reaction;

[0086] (2) Detect the acid value of the solution after reacting for 1 hour, and then detect the acid value of the solution every 30 minutes until the acid value of the solution is stable and does not continue to decline. Then add 0.3 mole of epoxy resin E188 (bisphenol A type epoxy resin molecular weight is 376) and account for the catalyst DBTDL of 0.1wt% of total reactant, in 140 ℃ insulation reaction, after 4 hours, detect solution acid value every 1 hour until the acid value of the solution is stabilized in the range of 0-5mgKOH / g, which is the end point of the react...

Embodiment 2

[0089] Boltorn H4001-HHPA-E188-40% Synthesis (40% of the hydroxyl groups of hyperbranched hydroxyl polyester Boltorn H4001 are replaced by epoxy groups)

[0090] (1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.4 mole of hexahydrophthalic anhydride to a four-necked flask with a stirrer, a thermometer and a condenser, start stirring and heat up to 130°C, and 130℃ insulation reaction;

[0091] (2) Detect the acid value of the solution after reacting for 1 hour, and then detect the acid value of the solution every 30 minutes until the acid value of the solution is stable and does not continue to decline. Then add 0.4 mole of epoxy resin E188 (bisphenol A type epoxy resin, molecular weight is 376) and account for the catalyzer DBTDL of 0.1wt% of total reactant, in 140 ℃ of insulation reactions, after 4 hours, detect solution acid every 1 hour value until the acid value of the solution reaches a stable range of 0-5mgKOH / g, which is the end point of the rea...

Embodiment 3

[0094] Boltorn H4001-HHPA-E140-10% Synthesis (10% of the hydroxyl groups of hyperbranched hydroxyl polyester Boltorn H4001 are replaced by epoxy groups)

[0095](1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.1 mole of hexahydrophthalic anhydride to a four-necked flask with a stirrer, thermometer and condenser, start stirring and heat up to 130°C, 130℃ insulation reaction;

[0096] (2) Detect the acid value of the solution after reacting for 1 hour, and then detect the acid value of the solution every 30 minutes until the acid value of the solution is stable and does not continue to decline. Then add 0.1 mole of epoxy resin E140 (aliphatic epoxy resin, molecular weight is 280) and account for the catalyzer DBTDL of 0.1wt% of total reactant, in 140 ℃ of insulation reactions, detect solution acid value every 1 hour after 4 hours, Until the acid value of the solution is stabilized in the range of 0-5mgKOH / g, it is the end point of the reaction. Add dilu...

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Abstract

The invention discloses hyperbranched epoxy resin. The structure of the hyperbranched epoxy resin is shown by formula (I), wherein HBP is the skeleton of a hyperbranched hydroxyl polymer; R1 is an alkyl group of acid anhydride; R2 is an alkyl group of epoxy resin; the sum of m and n is greater than or equal to 2 and less than or equal to the total number of functional groups of the hyperbranched polymer while m and n are positive integers; and by introducing the hyperbranched polymer into a coating composition, the crosslinking density of the coating can be improved, and the hardness and flexibility of a paint film as well as the adhesion of the coating and a base material are enhanced. Meanwhile, the activation period of the epoxy-amino system can be prolonged. The invention also discloses a preparation method of the hyperbranched epoxy resin and an application thereof in coating.

Description

technical field [0001] The invention relates to the technical field of macromolecules and coatings. More specifically, it relates to a hyperbranched epoxy resin, its preparation method and its application in coatings. Background technique [0002] Hyperbranched polymers are highly branched macromolecules with a three-dimensional branched structure. The molecular structure is relatively regular and has a narrow relative molecular mass distribution. It has a similar structure to dendritic polymers, but the synthesis method is simple. Generally, it can be synthesized in one step. Polymerization synthesis. Because the macromolecule has a compact structure similar to a sphere, the hydrodynamic radius of gyration is small, the degree of branching is high, and the molecular chains are less entangled, the viscosity changes little with the increase of the relative molecular mass. Moreover, macromolecules have many functional end groups, which have a very important impact on the ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C09D133/00C09D163/00
Inventor 张浩施珠容李世冰郑国民钟淑贞汪少锋
Owner LANGFANG NIPPON PAINT
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