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Half toughness fluorosilicone resite and its preparation method

A technology of fluorosilicone acrylic resin and fluororesin, which is applied in the field of semi-tough fluorosilicone acrylic resin and its preparation, and can solve the problems of restricting the application of elastic coatings and unsatisfactory stain resistance of elastic coatings

Inactive Publication Date: 2007-01-31
鳄鱼制漆(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stain resistance of general elastic coatings is not satisfactory. Many engineering practices have shown that it is precisely because of this defect that the application of elastic coatings is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of semi-tough fluorosilicone acrylic resin, its raw material proportioning is as follows according to weight percentage:

[0020] Fluorine resin 10%

[0021] Elastic Acrylic 50%

[0022] Silicone 8%

[0023] Hexamethylene diisocyanate 6%

[0024] Solvent 26%

[0025] Put fluororesin, elastic acrylic resin, organic silicon, hexamethylene diisocyanate and solvent into the reaction kettle, mix thoroughly, stir and heat to 70-75°C, keep warm for 3-4 hours. After the reaction is finished, cool down to room temperature and discharge to obtain semi-tough fluorosilicone acrylic resin. The semi-tough fluorosilicone acrylic resin and an appropriate amount of fully methylated amino resin are prepared according to a conventional two-component coating. The elongation at break of the obtained coating film is ≥350%, the adhesion is grade 1, the impact resistance is 50cm, and the scrubbing resistance is >5000 times. The salt spray resistance does not change for 1000 hours. ...

Embodiment 2

[0027] A kind of semi-tough fluorosilicone acrylic resin, its raw material proportioning is as follows according to weight percentage:

[0028] Fluoroplastic 45%

[0029] Elastic Acrylic 15%

[0030] Silicone 1%

[0031] Isophorone Diisocyanate 2%

[0032] Solvent 37%

[0033] Put fluororesin, elastic acrylic resin, silicone, isophorone diisocyanate and solvent into the reaction kettle, mix well, stir and heat to 75-80°C, keep warm for 4-5 hours, after the reaction, cool down to room temperature , discharging, to obtain semi-tough fluorosilicone acrylic resin. The semi-tough fluorosilicone acrylic resin and an appropriate amount of HDI trimer curing agent are prepared according to conventional two-component coatings. The elongation at break of the obtained coating film is ≥ 250%, the impact resistance is 50 cm, the scrub resistance is > 5000 times, and the adhesion is grade 1. There is no change in aging resistance for 5000 hours, and no change in salt spray resistance fo...

Embodiment 3

[0035] A kind of semi-tough fluorosilicone acrylic resin, its raw material proportioning is as follows according to weight percentage:

[0036] Fluoroplastic 30%

[0037] Elastomeric Acrylic 35%

[0038] Silicone 4%

[0039] 4,4'-Methylene-dicyclohexyl diisocyanate 4%

[0040] Solvent 27%

[0041] Put fluororesin, elastic acrylic resin, silicone, 4,4'-methylene-dicyclohexyl diisocyanate and solvent into the reaction kettle, mix thoroughly, stir and heat to 73-77°C, keep warm for 3-4 hours , after the reaction is finished, cool down to room temperature and discharge to obtain semi-tough fluorosilicone acrylic resin. The semi-tough fluorosilicone acrylic resin and IPDI pre-polymerized resin are prepared according to the conventional two-component coating, the elongation at break of the obtained coating film is ≥ 400%, the impact resistance is 50cm, the washing resistance is > 5000 times, the adhesion is grade 1, and the aging resistance No change for 5000 hours, no change f...

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Abstract

The present invention belongs to the field of external wall coating technology, in the concrete, it relates to a semi-toughness fluorosilicone acrylic resin and its preparation method. It is made up by using (by wt%) 10%-45% of fluororesin, 15%-50% of elastic acrylic resin, 1%-8% of organic silicone. 2%-6% of diisocyanate and 20%-37% of solvent, through cross-linking reaction process.

Description

technical field [0001] The invention belongs to the technical field of exterior wall coatings, and in particular relates to a semi-tough fluorosilicone acrylic resin and a preparation method thereof. Background technique [0002] Due to environmental changes, the external wall usually produces the following capillary cracks: when the plastering mortar is hardened, the hardening cracks are caused by volume reduction; when the temperature changes, the temperature cracks are caused by thermal expansion and contraction; Dry shrinkage cracks caused by wet expansion and dry shrinkage; freeze-thaw cracks caused by water freezing volume expansion during freeze-thaw, etc. Usually denser fluorocarbon paint film will produce fine cracks with stress when these cracks are generated, thus affecting its weather resistance and stain resistance. Elastic coatings can extend and retract with stress, and have suitable modulus and tensile strength when stretched, which can maintain the integrit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/02C08K5/29C08J3/24C08L101/04C09D133/02
Inventor 韩冬吕侠卢斯亮
Owner 鳄鱼制漆(上海)有限公司
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