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Composition for two-component fluorine coating material

A composition and coating technology, which is applied in the direction of anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problem of damage to old coating films, and achieve the effects of excellent physical properties, excellent processability, and excellent solubility of the coating film

Active Publication Date: 2009-09-02
MITSUI CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, similar to the above, when a strong solvent is contained in the coating resin, the old coating film may be damaged during the repair of the old coating film.

Method used

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  • Composition for two-component fluorine coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] Next, although this invention is demonstrated based on an Example and a comparative example, this invention is not limited to a following example.

Synthetic example 1

[0094] Synthesis example 1 (synthesis of curing agent A)

[0095] Under nitrogen atmosphere, charge 455.6gH into a 500mL capacity four-necked bottle equipped with stirrer, thermometer, nitrogen inlet tube and Dimro reflux condenser (Dimroth condenser). 6 XDI and 44.4g dodecanol, heated to 90°C and held for 2 hours.

[0096] Afterwards, as a reaction catalyst, add 0.02g of 2-ethylhexanoic acid trimethyl-N-2-hydroxypropyl ammonium (trimethyl-N-2-hydroxypropyl ammonium2-ethylhexanoate), while adjusting the reaction temperature to 90±5°C, While continuing to react for 2 hours. Then, 0.02 g of o-toluenesulfonamide was added as a catalyst deactivator to deactivate the reaction catalyst and stop the reaction.

[0097] Remove unreacted H from the resulting reaction solution 6 XDI obtained 201.1 g of light yellow and transparent polyisocyanate curing agent A (conversion rate 40%).

[0098] The allophanate / isocyanurate composition ratio of this polyisocyanate curing agent A is 72 / 28...

Synthetic example 2

[0100] Synthesis example 2 (synthesis of curing agent B)

[0101] A polyisocyanate curing agent B was obtained in the same manner as in Synthesis Example 1, except that n-decyl alcohol was used instead of dodecyl alcohol as the monohydric alcohol.

[0102] The allophanate / isocyanurate composition ratio of this polyisocyanate curing agent B is 71 / 29, the isocyanate content is 17.0%, the viscosity (by the viscosity measured by BL type viscometer) is 26000mPa·s, unreacted h 6 The content of XDI was 0.5% by mass, and it was confirmed by NMR measurement that there was substantially no urethane bond.

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Abstract

A coating composition is prepared by blending a polyisocyanate curing agent, a weak solvent-soluble fluorine-containing copolymer and a weak solvent. The polyisocyanate curing agent is obtained by a reaction between an alicyclic polyisocyanate and a monoalcohol having 10-50 carbon atoms. The weak solvent-soluble fluorine-containing copolymer is a copolymer obtained from a fluoroolefin and a double bond-containing monomer copolymerizable with the fluoroolefin, and has a fluorine content derived from fluoroolefin of not less than 10% by mass. In this connection, 5-30% by mole of the double bond-containing monomer contains a hydroxy group, while 10-50% by mole of the double bond-containing monomer contains a branched alkyl group having 3 or more carbon atoms.

Description

technical field [0001] The invention relates to a coating composition, in particular to a coating composition containing a polyisocyanate curing agent and a fluorine-containing copolymer. Background technique [0002] Conventionally, fluororesins are known as coating resins excellent in weather resistance, and can be used, for example, as high-efficiency anticorrosion topcoats and topcoats for cement substrates. [0003] In addition, when a strong solvent (strong polar solvent) such as toluene or xylene is contained in the above-mentioned fluororesin-containing coating resin, the coating film of synthetic resin lacquer, chlorinated rubber-based paint, natural lacquer (lacquer), etc. When the coating resin is directly coated on the old coating film that has changed over the years for repairing, etc., the following problems may occur, that is, shrinkage or swelling occurs, or the adhesiveness decreases. [0004] In addition, in order to improve the hardness and stain resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D127/12
CPCC08K5/34C09D5/08C09D175/04C08G18/7837C08G18/792C08G18/791C08G18/8064C08G18/6279C08G18/2825C07D251/34
Inventor 富冈昌洋笠原洁西村光弘
Owner MITSUI CHEM INC
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