CN102101964B - Organic silicon modified epoxy heat-resistant and anti-corrosive coating and preparation method thereof - Google Patents

Organic silicon modified epoxy heat-resistant and anti-corrosive coating and preparation method thereof Download PDF

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CN102101964B
CN102101964B CN201110001797A CN201110001797A CN102101964B CN 102101964 B CN102101964 B CN 102101964B CN 201110001797 A CN201110001797 A CN 201110001797A CN 201110001797 A CN201110001797 A CN 201110001797A CN 102101964 B CN102101964 B CN 102101964B
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coating
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modified epoxy
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CN102101964A (en
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姜方群
徐今能
汪庆宇
张逢春
余政炎
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Zhejiang bridge paint Co., Ltd.
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HANGZHOU PAINT CO Ltd
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Abstract

The invention relates to an organic silicon modified epoxy resin coating. The coating consists of a coating main agent A component and a curing agent B component, wherein a coating main agent consists of substrate resin, a pigment-filler, a solvent and an aid. The substrate resin is obtained by modifying epoxy resin E-20 by using a methyl phenyl organic silicon low polymer. The using amount of the substrate resin accounts for 50-55 percent of the weight of the coating main agent; the weight ratio of the methyl phenyl organic silicon low polymer to the epoxy resin E-20 is (11-20):(15-16); the curing agent is polyamide; and the weight ratio of the coating main agent to the curing agent is 100:(7-12). The solvent consists of xylene, butyl ester and an anti-settling agent 201P, wherein the using amount of xylene accounts for 5 % of the weight of the coating main agent. The using amount of butyl ester accounts for 2.5 % of the weight of the coating main agent and the using amount of anti-settling agent 201P accounts for 2-2.5 % of the weight of the coating main agent. The organic silicon modified epoxy resin coating, served as a modified epoxy heat-resistant coating, is better in heat resistance and corrosion resistance and excellent in paint film property.

Description

Modifying epoxy resin by organosilicon coating and preparation method thereof
Technical field
The invention belongs to the modification of epoxypaint, relate to a kind of modifying epoxy resin by organosilicon coating and preparation method thereof.
Background technology
In recent years; Develop rapidly along with new and high technology; To high-temperature-resistant structure material and heat resisting coating require increasingly highly, and facts have proved that high-temperature structural material and heat resisting coating will be accomplished existing good hot strength; Possess good anti-oxidant, corrosion resistance again and but compare difficulty, and expensive.Though existing epoxypaint has and has many excellent properties; Like good anti-oxidant, corrosion resistance; But its thermotolerance is good inadequately; Along with the continuous expansion of epoxy resin range of application, require increasingly highly to stable on heating, adopting the organosilicon performed polymer that epoxy resin is carried out modification is to give one of stable on heating important method of epoxy coating.
Organosilicon comprises physically modified and chemical modification to the modification of epoxy resin; Because molecular structure, consistency is bad when organosilicon and epoxy resin physical blending, and envrionment temperature is above the easy yellowing of epoxy resin after 150 ℃; Paint film is easy to crack, is difficult to reach the modification purpose.
Summary of the invention
Be difficult to accomplish existing good hot strength in order to solve existing epoxypaint, possess good anti-oxidant, corrosion resistance again, organosilicon is to the problem of the difficult modification of epoxy resin.The invention provides a kind of not only high temperature resistant but also erosion-resisting modifying epoxy resin by organosilicon coating and preparation method thereof.
Technical scheme of the present invention is: a kind of organic-silicon-modified epoxy Heat and corrosion resistant coating; Be made up of coating host A component and solidifying agent B component, described coating host is made up of binder resin, color stuffing, solvent and auxiliary agent, and described binder resin is got by aminomethyl phenyl organosilicon oligopolymer modified epoxy E-20; Its consumption accounts for the 50-55% of coating host weight; The weight ratio of aminomethyl phenyl organosilicon oligopolymer and epoxy resin E-20 is 11-20: 15-16, and described solidifying agent is a polymeric amide, and the weight ratio of described coating host and solidifying agent is 100: 7~12; Described solvent is made up of YLENE, butyl ester and anti-settling agent 201P; Wherein the consumption of YLENE accounts for 5% of coating host weight, and the consumption of butyl ester accounts for 2.5% of coating host weight, and the consumption of anti-settling agent 201P accounts for the 2-2.5% of coating host weight.
E-20 belongs to middle polymerization degree epoxy resin, has more-OH group, uses the organosilicon preformed polymer modification, and graft ratio is easier to, and synthetic back resin property is stable.The adding of auxiliary agent has certain effect for dispersiveness, leveling characteristics, the stability of coating.
Preferably, the weight ratio of described coating host and solidifying agent is 10: 1.
Preferably, described solidifying agent is polyamide curing agent NX2016.Because contain epoxide group in the modifying epoxy resin by organosilicon carbochain, the resin that has determined multiple amine, acid anhydrides and had some reactive group can make its crosslinking curing.The solidification effect of making solidifying agent with polymeric amide is superior; In film process; Main lean in the polyamide resin reactive hydrogen on the secondary amine to open the epoxy group(ing) in the modifying epoxy resin by organosilicon and be cross-linked into macromolecule membrane, both solidifying with polymeric amide can also can be under the condition of heating in room temperature (3~4 days), and it and modifying epoxy resin by organosilicon have compatibility preferably; And pot-life is longer, and paint film has sticking power, impact resistance, elasticity, water tolerance and weathering resistance preferably.Polymeric amide is nontoxic in the film-forming process helps manual operation, and condition of cure receives environment (like moisture, moisture) influence less.
Preferably, described color stuffing is made up of white titanium pigment and mica powder, and wherein the white titanium pigment consumption accounts for the 20-25% of coating host weight, and the mica powder consumption accounts for the 10-12% of coating host weight.The pigment of high-temperature resistant coating is main with MOX, and like TiO2, ZnO etc., the present invention also can add rust-stabilising pigment under particular requirement, like zn phosphate, aluminium triphosphate etc.
Preferably; Described binder resin is by the preparation of following step and get: with YLENE and pimelinketone as mixed solvent; Add organo-metallic salt catalyzer, epoxy resin E-20 and organosilicon oligopolymer obtain light yellow transparent liquid at 120~135 ℃ of reaction 3~5h; Adding an amount of solvent again, to make solid content be 50% solution, promptly gets binder resin; The weight part consumption of each raw material is: aminomethyl phenyl organosilicon oligopolymer 110-200 part, epoxy resin E-20
150-160 part, 140 parts of YLENE, 60 parts of pimelinketone, organo-metallic salt catalyzer 0.25-0.75 part;
Preferably, described organo-metallic salt catalyzer adopts zinc naphthenate.
A kind of preparation method of above-mentioned organic-silicon-modified epoxy Heat and corrosion resistant coating comprises the steps:
That 1) adopts that the methylphenyl siloxane monomer carries out prepolymer is synthesized into the organosilicon oligopolymer;
2) with YLENE and pimelinketone as mixed solvent; Add organo-metallic salt catalyzer, epoxy resin E-20 and organosilicon oligopolymer obtain light yellow transparent liquid at 120~135 ℃ of reaction 3~5h; Adding an amount of solvent again, to make solid content be 50% solution, promptly gets binder resin;
3) add color stuffing, solvent and auxiliary agent in the binder resin and promptly get coating host;
Step 2 wherein) the weight part consumption of each raw material is in: aminomethyl phenyl organosilicon oligopolymer 110-200 part, epoxy resin E-20 150-160 part, 140 parts of YLENE, 60 parts of pimelinketone, organo-metallic salt catalyzer 0.25-0.75 part;
The weight percent consumption of each raw material is in the step 3): binder resin 50-55%, color stuffing 30-37%, solvent 9.5-10%, auxiliary agent 0.25-0.5%.
Preferably; Solvent in the said step 3) is made up of YLENE, butyl ester and anti-settling agent 201P; Wherein the consumption of YLENE accounts for 5% of coating host weight, and the consumption of butyl ester accounts for 2.5% of coating host weight, and the consumption of anti-settling agent 201P accounts for the 2-2.5% of coating host weight.
Preferably, described color stuffing is made up of following components by part by weight: white titanium pigment 20-25 part, mica powder 10-12 part; Described organo-metallic salt catalyzer adopts zinc naphthenate.
Above-mentioned steps 2) reactive group of methyl toluene organosilicon oligopolymer and epoxy resin reason is in:
Figure GDA0000153778470000041
The present invention utilizes the hydroxyl in hydroxyl, amino, alkoxyl group and the epoxy resin in the silicone resin to carry out the condensation copolymerization reaction; Organosilicon-Si-O-group is grafted in the epoxy resin; Obtain having better thermotolerance, preservative property, and the good modified epoxy heat resisting coating of paint film property.
Embodiment
Bright specifically through embodiment below to the present invention's work, but protection scope of the present invention is not limited to this.
A kind of organic-silicon-modified epoxy Heat and corrosion resistant coating is made up of coating host A component and solidifying agent B component, and described coating host is made up of binder resin, color stuffing, solvent and auxiliary agent, and said coating host is got by following step preparation:
That 1) adopts that the methylphenyl siloxane monomer carries out prepolymer is synthesized into the organosilicon oligopolymer;
2) with YLENE and pimelinketone as mixed solvent; Add the zinc naphthenate catalyzer, epoxy resin E-20 and organosilicon oligopolymer obtain light yellow transparent liquid at 130 ℃ of reaction 4h; Adding an amount of solvent again, to make solid content be 50% solution, promptly gets binder resin;
Resin reaction is filled a prescription like following table 1:
Table 1: organic-silicon-modified epoxy heat stable resin composition of raw materials
Material name Weight part
Aminomethyl phenyl organosilicon oligopolymer 150
Epoxy resin E-20 155
YLENE 140
Pimelinketone 60
The zinc naphthenate catalyzer 0.50
3) add color stuffing, solvent and auxiliary agent in the binder resin and promptly get coating host; Coating host agent prescription such as following table 2:
Table 2, organic-silicon-modified epoxy Heat and corrosion resistant coating host agent prescription
Material name Mass percent %
Modifying epoxy resin by organosilicon 52
White titanium pigment 22
Mica powder 11
Anti-settling agent 201P 2.3
YLENE 5
Butyl ester 2.5
Auxiliary agent 0.3
Annotate: solidifying agent adopts polyamide curing agent NX2016, host: solidifying agent=10: 1.
Coating of the present invention is two-pack, need after completely solidified, do performance test, and its basic mechanical design feature index detects as follows:
A) time of drying: surface drying≤4h does solid work≤24h;
B) thermotolerance is 250 ℃: 4h passes through;
C) anti-40% sulfuric acid: 30 days no abnormal;
D) anti-5% sodium hydroxide: 30 days no abnormal;
E) viscosity (being coated with the 4# cup): >=80s;
F) impact strength: 50cm.
Annotate: coating heat resistance can test board for being of a size of the tinplate of 50mm * 120mm * 2mm, with paint spay-coating or brush on the tinplate tin test board, after the curing, at 250 ℃ of retort furnaces baking 4h down.
No abnormal-no bubble, wrinkling, crackle allow color and gloss that slight variation is arranged.
No abnormal-as not ftracture, do not come off, allow light discolouration.
Coating of the present invention has excellent thermotolerance and antiseptic property; Can adapt to 250-400 ℃ hot environment; The painting anticorrosion that is widely used in surfaces such as iron and steel chimney, high-temperature pipe, High Temperature Furnaces Heating Apparatus, petroleum cracking device, high-temperature reaction equipment and military industry equipment; Prevent metal thermooxidizing corrosion at high temperature such as iron and steel, guarantee the equipment life-time service, have good market outlook.

Claims (8)

1. organic-silicon-modified epoxy Heat and corrosion resistant coating; Form by coating host A component and solidifying agent B component; Described coating host is made up of binder resin, color stuffing, solvent and auxiliary agent, it is characterized in that: described binder resin is got by aminomethyl phenyl organosilicon oligopolymer modified epoxy E-20, and its consumption accounts for the 50-55% of coating host weight; Its concrete preparation process is: with YLENE and pimelinketone as mixed solvent; Add organo-metallic salt catalyzer, epoxy resin E-20 and aminomethyl phenyl organosilicon oligopolymer obtain light yellow transparent liquid at 120~135 ℃ of reaction 3~5h; Adding an amount of solvent again, to make solid content be 50% solution, promptly gets binder resin; Wherein the weight part consumption of each raw material is: aminomethyl phenyl organosilicon oligopolymer: 110-200 part, and epoxy resin E-20:150-160 part, YLENE: 140 parts, pimelinketone: 60 parts, organo-metallic salt catalyzer: 0.25-0.75 part; Described solidifying agent is a polymeric amide; The weight ratio of described coating host and solidifying agent is 100:7~12; Described solvent is made up of YLENE, butyl ester and anti-settling agent 201P; Wherein the consumption of YLENE accounts for 5% of coating host weight, and the consumption of butyl ester accounts for 2.5% of coating host weight, and the consumption of anti-settling agent 201P accounts for the 2-2.5% of coating host weight.
2. organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 1 is characterized in that: the weight ratio of described coating host and solidifying agent is 10:1.
3. organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 1 is characterized in that: described solidifying agent is polyamide curing agent NX2016.
4. organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 1; It is characterized in that: described color stuffing is made up of white titanium pigment and mica powder; Wherein the white titanium pigment consumption accounts for the 20-25% of coating host weight, and the mica powder consumption accounts for the 10-12% of coating host weight.
5. organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 1 is characterized in that: described organo-metallic salt catalyzer adopts zinc naphthenate.
6. the preparation method of the described organic-silicon-modified epoxy Heat and corrosion resistant coating of claim 1 is characterized in that comprising the steps:
That 1) adopts that the methylphenyl siloxane monomer carries out prepolymer is synthesized into the organosilicon oligopolymer;
2) with YLENE and pimelinketone as mixed solvent; Add organo-metallic salt catalyzer, epoxy resin E-20 and organosilicon oligopolymer obtain light yellow transparent liquid at 120~135 ℃ of reaction 3~5h; Adding an amount of solvent again, to make solid content be 50% solution, promptly gets binder resin;
3) add color stuffing, solvent and auxiliary agent in the binder resin and promptly get coating host;
Step 2 wherein) the weight part consumption of each raw material is in: aminomethyl phenyl organosilicon oligopolymer 110-200 part, epoxy resin E-20 150-160 part, 140 parts of YLENE, 60 parts of pimelinketone, organo-metallic salt catalyzer 0.25-0.75 part;
The weight percent consumption of each raw material is in the step 3): binder resin 50-55%, color stuffing 30-37%, solvent 9.5-10%, auxiliary agent 0.25-0.5%.
7. the preparation method of organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 6; It is characterized in that: the solvent in the said step 3) is made up of YLENE, butyl ester and anti-settling agent 201P; Wherein the consumption of YLENE accounts for 5% of coating host weight; The consumption of butyl ester accounts for 2.5% of coating host weight, and the consumption of anti-settling agent 201P accounts for the 2-2.5% of coating host weight.
8. the preparation method of organic-silicon-modified epoxy Heat and corrosion resistant coating according to claim 6 is characterized in that: described color stuffing is made up of following components by part by weight: white titanium pigment 20-25 part, mica powder 10-12 part; Described organo-metallic salt catalyzer adopts zinc naphthenate.
CN201110001797A 2011-01-06 2011-01-06 Organic silicon modified epoxy heat-resistant and anti-corrosive coating and preparation method thereof Active CN102101964B (en)

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Address after: 313201 No. 3 Hedong Road, Deqing County New Town Industrial Park, Zhejiang, Huzhou

Patentee after: Zhejiang bridge paint Co., Ltd.

Address before: Hangzhou City, Zhejiang province 310011 Gongshu District Dengyun Road No. 555

Patentee before: Hangzhou Paint Co., Ltd.