CN1073701A - Vinylformic acid (ester) powder coating - Google Patents
Vinylformic acid (ester) powder coating Download PDFInfo
- Publication number
- CN1073701A CN1073701A CN 91111820 CN91111820A CN1073701A CN 1073701 A CN1073701 A CN 1073701A CN 91111820 CN91111820 CN 91111820 CN 91111820 A CN91111820 A CN 91111820A CN 1073701 A CN1073701 A CN 1073701A
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- ester
- powder coating
- vinylformic acid
- barium metaborate
- resin
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Abstract
Vinylformic acid (ester) powder coating, it belongs to thermal-curable acrylic (ester) spray material.The preparation method of this powder coating is: the dispersion agent barium metaborate is joined vinylformic acid (ester) resin emulsion that adds phosphoric acid, make aqueous " solid-state " vinylformic acid (ester) resin-barium metaborate-phosphoric acid ternary dispersion system, grind into powder forms after cryodrying.Its solidifying agent is exactly a barium metaborate, about 1: 2 of the ratio of solidifying agent and vinylformic acid (ester) resin.This powder coating is suitable for spraying, and solidification value is 140～180 ℃, and the time is 25～30 minutes, has all good characteristics such as energy-conservation, nontoxic, preservative property, ornamental, weathering resistance, and cheap.
Description
The present invention relates to powder coating, relate in particular to the heat curable powder coating of forming by vinylformic acid (ester) and solidifying agent.
Powder coating is not contain free-water or organic solvent, carry out application and form the new coating of coating with powder morphology, it is medium with gas, by fluidized bed process or electrostatic spraying, making it to melt the attitude particulate with alkane is attached to and is coated with the part surface through preheating, and make its fusion levelling by heating, thereby obtain slick coating, because it is simple that it has operation, save energy, few environmental pollution, work efficiency height, the material use efficiency height, coating machine intensity is than former developed recently novel material, the new technology faster of becoming of advantages such as height.
Powder coating and application thereof originally in the forties, just enter industrially scalable to the sixties.In the world today, the annual production of powder coating 1978 was more than 40,000 ton.By 1984 above 100,000 tons, estimate to have exceeded 200,000 tons at present, as seen its development is fast, the powder coating of China rises away later, succeeded in developing the insulation epoxide powder coating in 65 years first, be developed into decoration, anticorrosion, temperature curing epoxy low powder coating in 74 years, epoxy, polyester-epoxy, polyester powder coating production line have been introduced after 82 years, acrylic powder coating had been developed test manufacture already, though the annual production of China's powder coating is from 60 tons of five kilotons that are increased to 85 years in 81 years, but still can not satisfy the demand far away.
Powder coating has with polyhexene, polyvinyl chloride, nylon etc. and is the representative thermoplastic powder coating and is typical thermosetting powder coating(s) two big classes with epoxy, epoxy-polyester, polyester, vinylformic acid (ester).Thermoplastic powder coating has chemical stability height, good toughness, advantage such as flexible, shortcoming such as it but exists film hardness and varies with temperature, and wears no resistance, and rete gloss and levelling property are bad.So be used for decorating less demanding production unit more.Heat curable powder coating, after fusion is crosslinked smooth hard rete, be difficult for soften because of temperature rise, the rete good luster, ornamental by force, should be used for ornamental external coatings of having relatively high expectations such as electric fan, refrigerator, washing machine, automobile, building.
In thermosetting powder coating(s), epoxide powder coating development the earliest, it has strong adhesion insulativity height, chemical stabilization, easy advantage such as storage, shortcoming is that weathering resistance is poor, gloss and planeness are undesirable, should make intermediate decorative coveringn, insulating coating and corrosion protection coating.End, polyester Fen coating has advantages such as better weather, insulativity, good luster, can make high-grade outdoor decoration coating and insulating coating, but its physical strength and chemical proofing is not as epoxide powder coating.Vinylformic acid (ester) powder coating has good gloss retention, weathering resistance, stain resistance, insulativity, and rete smooth, transparency are good, are that optimal flawless finish is filmed; Though its physical strength and preservative property are lower than epoxide powder coating slightly, it is still the most rising outdoor decorative coating, and its demand will leap to the first very soon.
Present vinylformic acid (ester) powder coating is become by powder vinylformic acid (ester) resin, solidifying agent and other ingredient groups.Wherein accounting for the powder coating ratio and be 15～20% solidifying agent is this class material of isocyanic ester, dead front type vulcabond or trimeric cyanamide mostly.Their prices are high, and toxic, and this will become the major obstacles of development vinylformic acid (ester) powder coating undoubtedly.
The present invention aims to provide a kind of inexpensive, and avirulent solidifying agent, and a kind of method for preparing vinylformic acid (ester) powder coating is provided, to reduce its cost, eliminate its toxicity, develop ornamental vinylformic acid (ester) powder coating with antiseptic property with Chinese characteristics.
The present invention realizes above-mentioned purpose like this:
The principal constituent of vinylformic acid of the present invention (ester) powder coating is vinylformic acid (ester) resin, and the solidifying agent of selecting for use is a barium metaborate; In the dry state powder coating, the weight ratio 1: 1.5～2.5 of solidifying agent and vinylformic acid (ester) resin is advisable, and contains small amounts of phosphoric acid (salt and ester).
The preparation method of this powder coating is: phosphoric acid is added vinylformic acid (ester) resin emulsion, transfer to 3～4 up to pH value emulsion, then the powdery barium metaborate is added vinylformic acid (ester) resin emulsion and thorough mixing as dispersion agent, make aqueous solid acrylic (ester) resin-barium metaborate-phosphoric acid (salt and ester) dispersion; Grind into powder after this dispersion system is done cryodrying, making with the barium metaborate is solidifying agent and vinylformic acid (ester) powder coating that contains small amounts of phosphoric acid (salt and ester).
The preparation manipulation of this powder coating is as follows: vinylformic acid (ester) resin emulsion is inserted reactor, high-speed stirring at normal temperatures and pressures, slowly add phosphoric acid (industrial) pH value of emulsion is transferred to 3～4, continue to stir and slowly add the powdery barium metaborate, continue again after finishing to stir 20 minutes, material is evenly distributed then material is put into another container, make it under static state, to solidify, make aqueous " solid-state " dispersion.This dispersion is inserted vacuum drying chamber, make it grind into powder after being lower than 65 ℃ of following vacuum-dryings, make vinylformic acid (ester) powder coating that contains solidifying agent barium metaborate and small amounts of phosphoric acid (salt and ester).The weight ratio of solidifying agent in this dry state powder coating and vinylformic acid (ester) resin is advisable with 1: 1.5～2.5, thus the add-on of barium metaborate can the resin emulsion total amount and emulsion solid content calculate and determine.
The prescription of this powder coating is:
Vinylformic acid (ester) resin emulsion (solid content is in 35%) 1000Kg
Phosphoric acid (d=1.17) 50～60kg
Barium metaborate (powder) 140～235kg
If emulsion changes to some extent, the add-on of phosphoric acid and barium metaborate can convert according to the actual solid content of emulsion and determine.
Technology indication by vinylformic acid (ester) powder coating of above-mentioned prescription and prepared is: fineness: 150 orders, storing temperature: 140～180 ℃; Storing time: 25～30 minutes.
The advantage of this powder coating is: 1, production process safety; 2, there are not separated from solvent or recovery in the production, three-waste free discharge yet; 3, almost do not have volatile matter to exist in the powder coating, when construction, do not produce spray dust; 4, production unit is simple, the production efficiency height; 5, be mixed with the powder coating of various different colours easily; 6, drying temperature is low, helps energy-conservationly, more helps realizing low-temperature curing; 7, abundant raw material, cost are low; 8, powder size is carefully even, solidification value is low, so the rete good luster also helps grasping thicknesses of layers; 9, insulativity, weathering resistance, preservative property are all good; 10, should do that high-grade dress is coated with, rete light, good hand feeling.
Embodiment and effect:
Example 1: on prepared in laboratory and experimental basis, I buy the ACRYLIC EMULSION of 50 kilograms of solid contents 30 ± 1% from market, with phosphoric acid the emulsion pH value is transferred to 3～4, under agitation add 7 kilograms of the inclined to one side canopy acid of powdered dispersion barium, solidify through static, make the moisture solid dispersion that contains dispersion agent, grinding powder after the drying, having made with the barium metaborate is the acrylic powder coating of solidifying agent, it is on probation that 10 kilograms in this sample is offered radiator factory, they construct with electrostatic spraying, and be cured by storing temperature that provides to them and time, product coating surfacing light, coating adhesion is good, resistance to acids and bases is all qualified, and preservative property are good.
Example 2: be by the ratio that concerns one ton of butyl acrylate that factory provides especially, vinylbenzene, methacrylic acid: the ratio that 105: 90: 4 solid content is 36% acrylate resin emulsion, made 30 kilograms of curing dose and resin amount by preceding method is 1: 2 a sample, it is on probation to offer radiator factory once more, found that, coating quality ratio 1 is better, its gloss, smooth, feel etc. also all are better than with vulcabond or trimeric cyanamide proving that as the rete that the vinylformic acid of solidifying agent divides last coating to form it is applicable to high-grade application.
Claims (5)
1, a kind of powder coating of being made by vinylformic acid (ester) resin, solidifying agent and other batching, it is characterized in that: the solidifying agent that this powder coating adopted is pulverous barium metaborate.
2, a kind of powder coating of making by vinylformic acid (ester) resin, solidifying agent and other batching, its preparation is characterised in that: after vinylformic acid (ester) resin emulsion is added phosphoric acid, the powdery barium metaborate is added resin emulsion as dispersion agent, make aqueous " solid-state " vinylformic acid (ester) resin-barium metaborate-phosphoric acid (salt) dispersion, grind into powder after cryodrying, making with the barium metaborate is vinylformic acid solidifying agent and that contain small amounts of phosphoric acid (salt) (ester) powder coating.
3, vinylformic acid according to claim 1 (ester) powder coating, it is characterized in that: in the powder coating of dry state, the part by weight of solidifying agent barium metaborate and vinylformic acid (ester) resin is advisable with 1: 1.5～2.5, and contains a spot of phosphoric acid (salt and ester).
4, vinylformic acid according to claim 2 (ester) powder coating, its preparation is characterised in that: the preparation manipulation of this powder coating is as follows: vinylformic acid (ester) resin emulsion is inserted reactor, high-speed stirring at normal temperatures and pressures, slowly add phosphoric acid (industrial), the pH value of emulsion is transferred to 3～4, continue to stir and slowly add the powdery barium metaborate, continue again after finishing to stir 20 minutes, material is evenly distributed then material is put into another container, make it under static state " curing ", make aqueous " solid-state " dispersion, this dispersion is inserted vacuum drying chamber, make it grind into powder after being lower than 65 ℃ of following vacuum-dryings, make vinylformic acid (ester) powder coating that contains solidifying agent barium metaborate and small amounts of phosphoric acid (salt and ester).
5, according to claim 1 or 2 or 3 or 4 described vinylformic acid (ester) powder coating, it is characterized in that: the prescription of preparation vinylformic acid (ester) powder coating is:
Vinylformic acid (ester) resin emulsion (solid content is in 35%) 1000kg
Phosphoric acid (d=1.17) 50～60kg
Barium metaborate (powder) 140～235kg
If resin emulsion is different, then the add-on of phosphoric acid and barium metaborate can convert according to the actual solid content of emulsion and determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111820 CN1073701A (en) | 1991-12-26 | 1991-12-26 | Vinylformic acid (ester) powder coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111820 CN1073701A (en) | 1991-12-26 | 1991-12-26 | Vinylformic acid (ester) powder coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1073701A true CN1073701A (en) | 1993-06-30 |
Family
ID=4910882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111820 Pending CN1073701A (en) | 1991-12-26 | 1991-12-26 | Vinylformic acid (ester) powder coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073701A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079401C (en) * | 1998-06-16 | 2002-02-20 | 黄维荃 | Solid propenoic acid resin for coating materials |
| CN101120062B (en) * | 2004-12-24 | 2011-11-30 | 帝斯曼知识产权资产管理有限公司 | Composition suitable for a powder coating composition comrising at least one resin and at least one dispersant |
-
1991
- 1991-12-26 CN CN 91111820 patent/CN1073701A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079401C (en) * | 1998-06-16 | 2002-02-20 | 黄维荃 | Solid propenoic acid resin for coating materials |
| CN101120062B (en) * | 2004-12-24 | 2011-11-30 | 帝斯曼知识产权资产管理有限公司 | Composition suitable for a powder coating composition comrising at least one resin and at least one dispersant |
| US8138240B2 (en) | 2004-12-24 | 2012-03-20 | Dsm Ip Assets B.V. | Composition suitable for a powder coating composition comprising at least one resin and at least one dispersant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |