Preparation method of modified unsaturated polyester resin coating

A polyester resin, unsaturated technology, used in polyester coatings, polyurea/polyurethane coatings, coatings, etc., to achieve high activity, good overall performance, and good filling.

Active Publication Date: 2014-03-12
山东晟宇涂业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of oxygen inhibition on the surface of unsaturated polyester coating, the following developments use polyurethane / epoxy resin to modify unsaturated polyester resin

Method used

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  • Preparation method of modified unsaturated polyester resin coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The aggregation steps are as follows:

[0023] (1) Synthesis of isocyanate prepolymer:

[0024] Add 1.01 mole of toluene diisocyanate dropwise to 1.00 mole of commercially available polyester diol, dibutyltin dilauric acid 0.01% mole, stir and mix at a slow speed at 50°C for further use.

[0025] (2) Preparation of polyurethane with epoxy resin at the end:

[0026] Add 1.01 mole of glycidyl ether epoxy resin dropwise to 1 mole of isocyanate prepolymer synthesized in step (1), add 0.05% mole of dibutyltin dilaurate catalyst, polymerize at 70°C, and synthesize the terminal group as epoxy Resin polyurethane, cool to room temperature.

[0027] (3) Preparation of polyurethane / epoxy resin modified unsaturated polyester resin coating:

[0028] Add 10 parts of polyurethane whose end is epoxy resin to 100 parts of commercially available common ortho-phthalic unsaturated polyester resin, and add 10 parts of 10% styrene diluent. Finally, add 0.5% triethylenediamine catalyst, 2...

Embodiment 2

[0031] The aggregation steps are as follows:

[0032] (1) Synthesis of isocyanate prepolymer:

[0033] Add 1.10 mol of diphenylmethane diisocyanate dropwise to 1.00 mol of commercially available polyether diol, 0.5% mol of dibutyltin dilauric acid catalyst, stir and mix at a slow speed at 50°C for further use.

[0034] (2) Preparation of polyurethane with epoxy resin at the end:

[0035] Add 1.10 moles of glycidyl ester epoxy resin dropwise to 1 mole of isocyanate prepolymer synthesized in step (1), add 0.5% mole of dibutyltin dilaurate catalyst, polymerize at 70°C, and synthesize the terminal group as epoxy Resin polyurethane, cool to room temperature.

[0036] (3) Preparation of polyurethane / epoxy resin modified unsaturated polyester resin coating:

[0037] Add 100 parts of polyurethane with epoxy resin terminal to 10 parts of commercially available common isophthalic unsaturated polyester resin and mix, and add 60 parts of 50% styrene butyl acetate diluent. Finally, add...

Embodiment 3

[0040] The aggregation steps are as follows:

[0041] (1) Synthesis of isocyanate prepolymer:

[0042] Add 1.05 moles of diphenylmethane diisocyanate dropwise to 1.00 moles of commercially available polyether diol, 0.5 moles of bis(dodecylsulfide) dibutyltin catalyst, stir and mix at a slow speed at 50°C until ready for use.

[0043] (2) Preparation of polyurethane with epoxy resin at the end:

[0044] Add 1.06 mol of glycidylamine epoxy resin dropwise to 1 mol of isocyanate prepolymer synthesized in step (1), add 0.1% mol of dibutyltin dilaurate catalyst, polymerize at 70°C, and synthesize the terminal group as epoxy Resin polyurethane, cool to room temperature.

[0045] (3) Preparation of polyurethane / epoxy resin modified unsaturated polyester resin coating:

[0046] Add 40 parts of polyurethane whose end is epoxy resin to 60 parts of commercially available common ortho-phthalic unsaturated polyester resin and mix, add 50 parts of acetone diluent with 20% styrene. Finall...

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Abstract

The invention provides a preparation method of a modified unsaturated polyester resin coating and belongs to the field of high molecular polymerization. The preparation method comprises the following steps of synthesizing an isocyanate prepolymer, preparing epoxy resin-terminated polyurethane, and preparing a polyurethane / epoxy resin modified unsaturated polyester resin coating. According to the preparation method provided by the invention, the modified unsaturated polyester resin coating does not need to be polished; the problems such as serious greening and the like can be solved; the construction period can be shortened obviously; the problem of surface softening of the polyurethane modified unsaturated polyester resin coating can be obviously improved.

Description

Technical field: [0001] The invention belongs to the field of macromolecule polymerization, and in particular relates to a preparation method of a polyurethane / epoxy resin modified unsaturated polyester resin coating. Background technique: [0002] Unsaturated polyester wood coating has excellent mechanical properties and chemical resistance. Its coating is bright and full, light and transparent, high hardness, good wear resistance, high solid content, and can be thickly coated at one time. Especially the styrene in the diluent can participate in the reaction to form a film, these properties are unmatched by some solvent-based coatings. However, when it is cured into a film, due to the polymerization inhibition effect of oxygen in the air, the surface of the paint film is not dry and sticky, and it sticks to sandpaper when polished. This is because the curing of unsaturated polyester resin is a free radical copolymerization reaction, and the surface of the paint film is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D175/04C08G18/58C08G18/42C08G18/48C08G18/10
Inventor 张震乾吉祥王佩何剑虹
Owner 山东晟宇涂业股份有限公司
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