Carbon dioxide base waterborne polyurethane, carbon dioxide base waterborne polyurethane coating and preparation method thereof

A technology of water-based polyurethane and carbon dioxide, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problems of hard coating film and high glass transition temperature, and achieve good oxidation resistance and hydrolysis resistance properties, low glass transition temperature, and good mechanical properties

Active Publication Date: 2016-02-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of the existing poly(carbonate-ether) type water-based polyurethane coating with high glass transition temperature and hard

Method used

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  • Carbon dioxide base waterborne polyurethane, carbon dioxide base waterborne polyurethane coating and preparation method thereof
  • Carbon dioxide base waterborne polyurethane, carbon dioxide base waterborne polyurethane coating and preparation method thereof
  • Carbon dioxide base waterborne polyurethane, carbon dioxide base waterborne polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] combine figure 1 and image 3 Illustrative Example 1

[0085] Preparation of carbon dioxide-based water-based polyurethane with formula I structure:

[0086] (1) Under nitrogen protection, 200g poly(carbonate-ether) glycol (number-average molecular weight: 1500 Dalton) and 270g polypropylene glycol (number-average molecular weight: 2000 Dalton) are added in the reactor, and the temperature is raised to 100°C, after vacuum distillation for 3 hours, lower the temperature to 80°C, dissolve 150g of diphenylmethane diisocyanate in 150g of butanone, drop it into the reactor at a speed of 12ml / min, and polymerize for 2.5h to obtain the first prepolymer;

[0087] (2) Dissolve 80g of 2,2-dimethylolpropionic acid and 0.4g of dibutyltin dilaurate in 250g of methyl ethyl ketone, add it to the reaction kettle, and continue the reaction for 4 hours to obtain the second OH-terminated prepolymer;

[0088] (3) Dissolve 100g of diphenylmethane diisocyanate in 340g of methyl ethyl keton...

Embodiment 2

[0095] Preparation of carbon dioxide-based water-based polyurethane with formula I structure:

[0096] (1) Under nitrogen protection, add 680g poly(carbonate-ether) diol (number average molecular weight: 3400 Dalton) and 600g polytetrahydrofuran diol (number average molecular weight: 3000 Dalton) into the reactor , raised the temperature to 100°C, distilled under reduced pressure for 3 hours, then lowered the temperature to 80°C, dissolved 160g of dicyclohexylmethane diisocyanate in 160g of methyl ethyl ketone, dropped it into the reactor at a speed of 10ml / min, and polymerized for 2.5h to obtain the terminal a first prepolymer with NCO;

[0097] (2) 90g of 2,2-dimethylolbutyric acid and 0.5g of dibutyltin dilaurate were dissolved in 280g of butanone, added to the reaction kettle, and the reaction was continued for 4 hours to obtain the second OH-terminated prepolymer;

[0098] (3) Dissolve 110g of dicyclohexylmethane diisocyanate in 320g of butanone, drop it into the reactor...

Embodiment 3

[0104] Preparation of carbon dioxide-based water-based polyurethane with formula I structure:

[0105] (1) Under the protection of nitrogen, 720g poly(carbonate-ether) diol (number average molecular weight: 6000 Dalton) and 560g polycaprolactone diol (number average molecular weight: 2000 Dalton) were added to the reaction In the kettle, heat up to 100°C, distill under reduced pressure for 3 hours, then cool down to 80°C, dissolve 100g of 1,6-hexamethylene diisocyanate in 200g of methyl ethyl ketone, drop it into the reaction kettle at a speed of 11ml / min, and continue to polymerize for 2 hours , to obtain the first prepolymer with NCO at the end;

[0106] (2) Dissolve 80g of 2,2-dimethylolpropionic acid and 0.6g of dibutyltin dilaurate in 310g of methyl ethyl ketone, add it to the reaction kettle, and continue the reaction for 2 hours to obtain the second OH-terminated prepolymer;

[0107] (3) Dissolve 70g of 1,6-hexamethylene diisocyanate in 280g of butanone, drop it into t...

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Abstract

The invention discloses a carbon dioxide base waterborne polyurethane, a carbon dioxide base waterborne polyurethane coating and a preparation method thereof, and belongs to the technical field of polyurethane coatings. The problems that glass-transition temperature of an existing poly(carbonic ester-ether) type waterborne polyurethane coating is high, and a film is hard are solved. The coating is prepared from, by weight, 75-92 parts of carbon dioxide base waterborne polyurethane, 0.2-2 parts of a waterborne thickening agent, 0.1-0.3 part of a waterborne flatting agent, 0.1-0.5 part of a waterborne antifoaming agent, 6-8 parts of waterborne cosolvent, 0.3-0.5 part of a waterborne wetting agent, 0.05-0.1 part of a waterborne antitoxin sterilizing agent and 2-5 parts of a waterborne curing agent. According to the coating, the tensile strength reaches 12-65 MPa, the elongation at break reaches 590-1300%, the glass-transition temperature reaches -30-0 DEG C, and the hardness reaches 2 B-F, and the wide application prospect is achieved.

Description

technical field [0001] The invention relates to a carbon dioxide-based waterborne polyurethane, a carbon dioxide-based waterborne polyurethane coating and a preparation method thereof, belonging to the technical field of polyurethane coatings. Background technique [0002] Polyurethane coatings have been widely used in household coatings, metal anti-corrosion, automotive coatings, floor paints, road marking paints, etc. because of their good wear resistance, corrosion resistance, chemical resistance, and mechanical properties. [0003] Existing polyurethane coatings mainly include solvent-based polyurethane coatings and water-based polyurethane coatings. Among them, solvent-based polyurethane coatings are volatile, and as people pay more attention to environmental protection and safety issues, their use is limited. Water-based polyurethane coatings use water as the dispersion medium, which not only retains some of the advantages of solvent-based polyurethane coatings, but a...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C08G18/48C08G18/34C08G18/12C09D175/08C09D175/06C09D7/12C09D5/14C09D7/00C09D7/06C09D7/47
CPCC08G18/12C08G18/4018C08G18/4238C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/664C08G18/6659C08G18/6674C08G18/6692C09D5/14C09D7/20C09D7/40C09D7/47C09D175/06C09D175/08C08G18/3206C08G18/348
Inventor 汪金张红明王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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