Fluoro-polyester resin and preparation method and application thereof

A technology of fluorine-containing polyester and resin, which is applied in the field of polymers to achieve the effects of reducing requirements, improving hydrophobicity, and reducing dosage

Inactive Publication Date: 2011-09-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in powder coatings, there are few studies on the use of chemical methods to introduce fluorine into the matrix resin of powder coatings to realize the hydrophobic function of coatings.

Method used

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  • Fluoro-polyester resin and preparation method and application thereof
  • Fluoro-polyester resin and preparation method and application thereof
  • Fluoro-polyester resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Formula for synthesizing tetrafluoropropyl glycidyl ether

[0067] Element

Mass / g(mol / mol)

[0068] Epichlorohydrin

55.5(6.0×10 -1 )

Tetrafluoropropanol

13.20(1.0×10 -1 )

Tetraethylammonium bromide

0.105(5.0×10 -4 )

sodium hydroxide

4.2(1.05×10 -1 )

[0069] Synthesize tetrafluoropropyl glycidyl ether according to the above formula, add epichlorohydrin (55.5g / 6.0×10 -1 mol) and tetrafluoropropanol (HCF 2 CF 2 CH 2 OH) (13.20g / 1.0×10 -1 mol), in 0.105g (5.0×10 -4 mol) tetraethylammonium bromide as a catalyst, and add 10mL of toluene as a solvent, heat and stir, after the temperature rises to 70°C, add a total of 4.2g of sodium hydroxide in five equal amounts (1.05×10 -1 mol), reacted for 5h, and then rectified the resulting product to collect fractions at 135°C to 145°C. The collected fractions were analyzed by infrared spectrogram, and the results were as follows: figure 1 , indicating ...

Embodiment 2

[0077] In addition to using 1.0g (5.347×10 -3 mol) synthetic tetrafluoropropyl glycidyl ether and 8.756g (9.653 × 10 -2 mol) of epichlorohydrin instead of 0.5g (2.674 × 10 -3 mol) tetrafluoropropyl glycidyl ether and 9.0g (9.733×10 -2 mol) except the epichlorohydrin, all the other conditions are identical with embodiment 1, make fluorine-containing polyester resin and hydrophobic fluorine-containing polyester powder coating finished product.

Embodiment 3

[0079] In addition to using 2.0g (1.070×10 -2 mol) synthetic tetrafluoropropyl glycidyl ether and 8.260g (8.930 × 10 -2 mol) epichlorohydrin replaces 0.5g (2.674 × 10 -3 mol) tetrafluoropropyl glycidyl ether and 9.0g (9.733×10 -2 mol) except the epichlorohydrin, all the other conditions are identical with embodiment 1, make fluorine-containing polyester resin and hydrophobic fluorine-containing polyester powder coating finished product.

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Abstract

The invention discloses a fluoro-polyester resin and a preparation method and application thereof. The preparation method for the fluoro-polyester resin comprises the following steps of: reacting alkyl diol, cyclic anhydride, a fluorine-free mono-epoxy compound and a fluoro-containing mono-epoxy compound, diluting a reaction product by using acetone, adding into distilled water with stirring, and separating out a sediment to obtain the fluoro-polyester resin. The fluoro-polyester resin, a curing agent, a filer and an aid in a certain ratio are prepared into a hydrophobic polyester powder coating. The coating film has a large contact angle with water, and has high hydrophobicity. The fluoro-polyester resin is prepared from cyclic anhydride; and because water is not generated in the reaction process and vacuum dehydration is not needed, the requirement on a polyester synthesizing device is reduced and cost is saved.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a fluorine-containing polyester resin and a preparation method and application thereof. Background technique [0002] Polyester powder coatings have good light resistance, good adhesion to substrates, no need for additional primers, rich sources of raw materials, and no organic solvents, so polyester powder coatings are widely used in industrial and household appliance casings, chemical industry Coating of equipment, food processing equipment, mechanical parts, automobile shock absorbing springs, shelves, traffic road equipment, safety guardrails, etc. Foreign countries have applied polyester powder coatings to outdoor buildings (such as aluminum alloy window frames), air-conditioning shells, parks and seaside facilities, bicycle racks and other outdoor metal parts. [0003] However, the hydrophobic properties of conventional polyester powder coatings are not ideal, and the coating film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/682C08G63/78C09D167/02C09D5/03
Inventor 晋云全申屠宝卿翁志学
Owner ZHEJIANG UNIV
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