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Acrylic acid modified polysiloxane resin and application thereof to self-stratifying coating

A polysiloxane resin, acrylic technology, applied in anti-corrosion coatings and other directions, can solve problems such as poor weather resistance and long-term effect, achieve good anti-corrosion and weather resistance, obvious cost advantages, and improve the effect of anti-corrosion and weather resistance

Inactive Publication Date: 2016-04-13
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor weather resistance and long-lasting performance of industrial heavy-duty anti-corrosion coatings in the prior art, the present invention firstly provides an acrylic modified polysiloxane resin, which provides better dryness and weather resistance for coatings. The invention also provides a high-weather-resistant heavy-duty anti-corrosion coating with the resin as the main component and a cross-linking curing agent. The coating can have better anti-corrosion and weather resistance under extremely low silicon content

Method used

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  • Acrylic acid modified polysiloxane resin and application thereof to self-stratifying coating
  • Acrylic acid modified polysiloxane resin and application thereof to self-stratifying coating

Examples

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Effect test

Embodiment 1

[0031] Add 700g of solvent butyl acetate to the reactor, stir and heat up to 120°C, reflux for 15 minutes, start to add dropwise 800g of methyl methacrylate, 460g of hydroxyethyl acrylate, 40g of methacrylic acid, 150g of n-butyl acrylate, styrene 390g, a mixed solution of 160g of γ-methacryloxypropylmethyldimethoxysilane and 50g of initiator azobisisobutyronitrile, drop it in 3 hours, keep the temperature of the dropping process at 120°C, drop it After 2 hours of heat preservation, 10g of azobisisobutyronitrile (dissolved in 200g of butyl acetate) was added, further heat preservation was carried out for 1 hour, and finally 300g of butyl acetate was added, and the material was discharged to obtain propionic acid modified silicone resin-A.

Embodiment 2

[0033] Add 700g of solvent butyl acetate to the reactor, stir and heat up to 120°C, reflux for 15 minutes, start to add dropwise 750g of methyl methacrylate, 460g of hydroxyethyl acrylate, 40g of methacrylic acid, 190g of n-butyl acrylate, styrene 260g, a mixed solution of 300g of γ-methacryloxypropylmethyldimethoxysilane and 50g of initiator azobisisobutyronitrile, drop it in 3 hours, keep the temperature of the dropping process at 120°C, After 2 hours of heat preservation, 10 g of azobisisobutyronitrile (dissolved in 200 g of butyl acetate) was added, further heat preservation was carried out for 1 hour, and finally 300 g of butyl acetate was added and discharged to obtain propionic acid modified silicone resin-B.

Embodiment 3

[0035] Add 700g of solvent butyl acetate to the reactor, stir and heat up to 120°C, reflux for 15 minutes, start to add dropwise 750g of methyl methacrylate, 460g of hydroxyethyl acrylate, 40g of methacrylic acid, 190g of n-butyl acrylate, styrene 260g, a mixed solution of 300g vinyltriisopropoxysilane and 50g initiator azobisisobutyronitrile, drop it in 3 hours, keep the temperature of the dropping process at 120°C, keep warm for 2 hours after dropping, add 10g azobisisobutyronitrile Azodiisobutyronitrile (dissolved in 200g butyl acetate), keep warm for 1h, and finally add 300g butyl acetate before discharging. Propionic acid-modified silicone resin-C was obtained.

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Abstract

The invention relates to acrylic acid modified polysiloxane resin and application thereof to a self-stratifying coating. The resin contains two kinds of groups for a cross-linking reaction, consequently different curing agents can be selected for curing of the coating prepared from the resin according to performance requirements, and a silicon part and other parts in the resin have special compatibility. The self-stratifying coating containing the acrylic acid modified polysiloxane resin contains a component A and a component B, wherein the component A is prepared from 15-70 wt% of the acrylic acid modified polysiloxane resin, 5-40 wt% of pigment filler, 0.5-2 wt% of auxiliary and 10-45 wt% of solvent, and a coupling agent containing isocyanate groups or aminosilane can be selected for the component B according to coating performance requirements. Compared with an existing acrylic acid modified polysiloxane coating, the coating is high in surface drying speed, can achieve gradient self-stratifying in the film forming process, and has good corrosion resistance and weather resistance on the condition that the organosilicone content is extremely low.

Description

Technical field: [0001] The invention relates to the field of heavy-duty anti-corrosion coatings, in particular to an acrylic-modified polysiloxane resin and its application in self-layering coatings. Background technique [0002] With the development of the coatings industry, the market size of anti-corrosion coatings is second only to architectural coatings and ranks second in demand. [0003] At present, the commonly used anti-corrosion coating resins are composed of C-C molecular chains, and the chemical bonds will be broken under the irradiation of ultraviolet light. Even polyurethane coatings with relatively good weather resistance cannot meet the long-term weather resistance of heavy-duty anti-corrosion coatings. requirements. [0004] Therefore, the development of anti-corrosion coating topcoats with high weather resistance has become an important direction for the development of anti-corrosion coatings. The silicon-oxygen bond has good thermal stability and chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/28C08F220/06C08F220/18C08F212/08C08F230/08C09D133/12C09D5/08
CPCC08F220/14C09D5/08C09D133/12C08F220/281C08F220/06C08F220/1804C08F212/08C08F230/08
Inventor 王娴娴许季海牟迪姚唯亮孙凌
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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