Hyperbranched polyester resin pigment dispersant as well as preparation method thereof, color paste and application of color paste

A technology of hyperbranched polyester and resin pigments, applied in pigment paste, chemical instruments and methods, transportation and packaging, etc., can solve the problem of reducing the hydroxyl functional group of hyperbranched polyester, which is not conducive to crosslinking reaction, acid resistance, alkali resistance, Problems such as resistance to adverse effects of water

Active Publication Date: 2014-10-08
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: after modification, the hydroxyl functional groups of hyperbranched polyester are greatly reduced, which is not conducive to the next step of crosslinking reaction, and at the same time, a large number of carboxyl groups are introduced, which will greatly affect the acid resistance, alkali resistance and water resistance of the coating after film formation. big adverse effects

Method used

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  • Hyperbranched polyester resin pigment dispersant as well as preparation method thereof, color paste and application of color paste
  • Hyperbranched polyester resin pigment dispersant as well as preparation method thereof, color paste and application of color paste
  • Hyperbranched polyester resin pigment dispersant as well as preparation method thereof, color paste and application of color paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.5 mole of methylhexahydrophthalic anhydride to a four-necked flask with a stirrer, thermometer and condenser, start stirring and heat up to 130°C , at 130°C - heat preservation reaction;

[0049] (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. Then add 0.5 mole of glycidyl tert-butyl benzoate, and keep it warm at 140°C for reaction. After 4 hours, check the acid value of the solution every hour until the acid value of the solution reaches a stable range of 2-10mgKOH / g, which is the end of the reaction. Add diluting solvent butyl acetate, adjust the solid content to 70%, and obtain a light yellow transparent liquid, which is the product hyperbranched polyester resin pigment dispersant, with a solid primary hydroxyl content of 4.3%, a number average molecular weight of...

Embodiment 2

[0051] (1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.3 mole of phthalic anhydride to a four-necked flask with a stirrer, thermometer and condenser, start stirring and raise the temperature to 110°C, at 110°C insulation reaction;

[0052] (2) Check the acid value after 1 hour of reaction, and then check the acid value every 30 minutes until the acid value is stable. Then add 0.3 mole of glycidyl 2-ethylhexanoate, keep the temperature at 150°C for reaction, check the acid value every 1 hour after 4 hours, until the acid value reaches a stable range of 2-10mgKOH / g, which is the end of the reaction, add Dilute solvent butyl acetate, adjust solid content 70%, the product that obtains is a kind of light yellow transparent liquid and is product hyperbranched polyester pigment dispersant, and its solid primary hydroxyl content is 5.4%, number average molecular weight is 5730, weight average The molecular weight is 10550.

Embodiment 3

[0054] (1) Add Boltorn H4001 solution containing 1 mole of hydroxyl groups and 0.1 mole of trimellitic anhydride to a four-necked flask with a stirrer, a thermometer and a condenser, start stirring and heat up to 110°C, and keep warm at 110°C for reaction;

[0055] (2) Check the acid value after 1 hour of reaction, and then check the acid value every 30 minutes until the acid value is stable. Then add 0.2 moles of glycidyl tertiary carbonic acid ester, keep it warm at 140°C, and check the acid value every hour after 4 hours until the acid value reaches a stable range of 2 to 10 mgKOH / g, which is the end of the reaction, and add the diluting solvent butyl acetate Ester, adjust the solid content to 70%, and the product obtained is a light yellow transparent liquid, which is a hyperbranched polyester pigment dispersant, and the solid primary hydroxyl content is 7.1%.

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Abstract

The invention discloses a hyperbranched polyester resin pigment dispersant as well as a preparation method thereof, color paste and application of color paste. The hyperbranched polyester resin pigment dispersant is a dendritic hyperbranched polyester with a hydroxyl functional group and a 3D structure, wherein number-average molecular weight of the polyester is 1500-20000, and solid content of the polyester is 20%-90%; the hyperbranched polyester resin pigment dispersant is prepared by reacting acid anhydride with hyperbranched polyester, and then reacting with a compound with a monoepoxy functional group at one end and a hydrophobic long-carbon chain at the other end. The long-chain alkyl / acryl introduced by the dispersant is just as a structure of a fish hook, has good compatibility with a paint main body resin molecular chain, and can lower re-flocculation or aggregation possibility of a dispersion system. Paint or color paste adopting the dispersant disclosed by the invention can reach fineness requirements by grinding within short time; the paint or the color paste is applied to finished product paint, so that the finished product paint has high hardness, and good thermal storage and room-temperature storage stability, and finished product paint precipitation and flooding can be effectively relieved.

Description

technical field [0001] The invention relates to the technical field of pigment dispersants and color pastes, in particular to a hyperbranched polyester resin pigment dispersant, a preparation method, a color paste, and an application of the color paste. Background technique [0002] As a colorant, the pigment can only exert a good coloring effect if it is uniformly and stably dispersed in the coating film. At present, surfactants and some low-molecular coupling agents are generally used to modify the surface of pigments, change the polarity of the pigment surface, and reduce the agglomeration and flocculation of pigments. However, in the actual application of pigment dispersion and preparation of color paste, there are still low dispersion efficiency of color paste, the prepared paint is prone to precipitation during storage, and the paint film has the phenomenon of floating color and blooming. [0003] Compared with traditional linear polymers, hyperbranched polyester has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C09D17/00C09K23/52
CPCC09D17/00C08G63/91C09D17/003C09D17/004C09D17/005C09D17/007
Inventor 何东风施珠容金志光李世冰汪少锋萧正铭梁健
Owner NIPPON PAINT IND COATINGS SHANGHAI
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