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Organic silicon polyurethane composite modified alkyd resin coating composition and preparation method thereof

A technology of alkyd resin and compound modification, which is applied in the field of coatings, can solve the problems that cannot meet the requirements of long life of steel structure, heavy anti-corrosion, limited improvement of weather resistance and anti-aging performance, and decreased adhesion, so as to achieve excellent adhesion, The effect of reducing the preparation cost and improving the comprehensive performance

Active Publication Date: 2011-07-27
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obvious improvement of the anti-aging performance of the coating depends on the amount of silicone introduced. When the content of silicone is 30% to 50%, the anti-aging performance is most significantly improved; but with the increase of the content of silicone introduced, the coating film becomes brittle. Decreased adhesion
Therefore, the previous physical blending modification and single-component chemical grafting modification of organosilicon alkyd coatings have limited improvement in outdoor weather resistance and anti-aging performance, and cannot meet the long-life and heavy-duty anti-corrosion requirements of steel structures.

Method used

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  • Organic silicon polyurethane composite modified alkyd resin coating composition and preparation method thereof
  • Organic silicon polyurethane composite modified alkyd resin coating composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The organosilicon polyurethane composite modified alkyd resin coating composition that this embodiment provides:

[0047]Curing agent component, namely A component: 12 parts of isocyanate, 30 parts of polysiloxane (hydroxyl value 6), 2.0 parts of catalyst, 56 parts of solvent, by weight fraction;

[0048] Hydroxyl component, that is, component B: 28 parts of alkyd resin, 27 parts of solvent, 18 parts of pigment and filler, 11 parts of wetting and dispersing agent, 7 parts of leveling agent, and 9 parts of anti-skinning agent, calculated by weight fraction;

[0049] A component: B component=1: 6, by weight fraction;

[0050] The steps for preparing the A component are:

[0051] Step 1: Weighing according to weight fraction, isocyanate 12, polysiloxane 30, catalyst 2.0, solvent 56, the total weight fraction of each component is 100;

[0052] Step 2: Add 30 parts of polysiloxane in step 1 into the reaction kettle, heat up to 110-120°C and dehydrate for 1-3 hours under a ...

Embodiment 2

[0064] The organosilicon polyurethane composite modified alkyd resin coating composition that this embodiment provides:

[0065] Curing agent component, namely A component: 20 parts of isocyanate, 33 parts of polysiloxane (hydroxyl value 8), 2.0 parts of catalyst, 45 parts of solvent, by weight fraction;

[0066] Hydroxyl component, that is, component B: 31 parts of alkyd resin, 21.5 parts of solvent, 20 parts of pigment and filler, 9.5 parts of wetting and dispersing agent, 9 parts of leveling agent, 9 parts of anti-skinning agent, calculated by weight fraction;

[0067] A component: B component=1: 6, by weight fraction;

[0068] Preparation process of component A:

[0069] Identical to the preparation process of A component among the embodiment 1;

[0070] The preparation process of component B:

[0071] Identical to the preparation process of B component among the embodiment 1;

[0072] Component A and component B are uniformly mixed according to the weight ratio of 1:6...

Embodiment 3

[0074] The organosilicon polyurethane composite modified alkyd resin coating composition that this embodiment provides:

[0075] Curing agent component, i.e. component A: 16 parts of isocyanate, 40 parts of polysiloxane (hydroxyl value 6), 2.0 parts of catalyst, 42 parts of solvent, by weight fraction;

[0076] Hydroxyl component, that is, component B: 35 parts of alkyd resin, 26 parts of solvent, 15 parts of pigment and filler, 8 parts of wetting and dispersing agent, 7 parts of leveling agent, 9 parts of anti-skinning agent, calculated by weight fraction;

[0077] A component: B component=1: 6, by weight fraction;

[0078] Preparation process of component A:

[0079] With the preparation technology of A component among the embodiment 1;

[0080] The preparation process of component B:

[0081] With the preparation technology of B component among the embodiment 1;

[0082] Component A and component B are uniformly mixed according to the weight ratio of 1:6 to obtain the c...

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Abstract

The invention discloses an organic silicon polyurethane composite modified alkyd resin coating composition and a preparation method thereof. The double-component coating composition contains the components in parts by weight: 0.3 to 1.2 parts of A and 6 parts of B, wherein the component A is modified active polysiloxane; the component B comprises alkyd resin, solvent, pigment and filler, wetting dispersant, leveling agent and anti-skinning agent; and when in use, the component A and the component B are mixed uniformly according to the proportion. The composition B is prepared by the following steps of: 1) uniformly mixing, abrading and dispersing the raw materials; and 2) adding the leveling agent and the anti-skinning agent to the abrasive. The coating composition disclosed by the invention has excellent comprehensive properties including good adhesion, salt spray resistance, salt water resistance, ageing resistance and the like, and is suitable for heavy-duty coating protection of a steel structure.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an organosilicon polyurethane composite modified alkyd resin coating composition and a preparation method thereof. Background technique [0002] Alkyd resin coating is a type of coating with oil-modified alkyd resin as the main film-forming substance. It can be dried at room temperature, the paint film is hard and bright, and has excellent weather resistance. It is widely used in industrial coatings and architectural coatings. The molecular structure of alkyd resin contains more ester groups, which makes its coating film performance have obvious shortcomings, such as: slow drying of the coating film, low hardness, poor water resistance, poor corrosion resistance, poor outdoor weather resistance, etc. The existing traditional single-component alkyd resin prepared organic coatings can no longer meet these increasingly stringent requirements in terms of resistance to physical changes, chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D175/14C09D7/12
Inventor 陈云耿刚强陈新刘胜林王双枝
Owner CHINA ELECTRIC POWER RES INST
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