CN87102902A - Hydrophilic polyurethanes coating and preparation method - Google Patents
Hydrophilic polyurethanes coating and preparation method Download PDFInfo
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- CN87102902A CN87102902A CN 87102902 CN87102902A CN87102902A CN 87102902 A CN87102902 A CN 87102902A CN 87102902 CN87102902 CN 87102902 CN 87102902 A CN87102902 A CN 87102902A CN 87102902 A CN87102902 A CN 87102902A
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Abstract
The present invention relates to a kind of hydrophilic polyurethanes coating and preparation method.It is characterized in that this coating by the Viscotrol C of the polyether glycol, 5～10% (weight) of the oxyethane of the polyisocyanates, 15～25% (weight) of 20～30% (weight) and propylene oxide and other auxiliary reagent etc. in the presence of the retardant of 0.08～0.18% (weight), with the simple process preparation and get.Coating of the present invention has the high-performance of solvent based coating, but is easy to dispersion and emulsion in water, so used construction equipment and container can wash by water, this invention will alleviate the stimulation of solvent to human body, reduces construction cost, reduces the pollution to environment.
Description
The present invention relates to a kind of hydrophilic polyurethanes coating and preparation method.
Polyurethane coating scalds because of its paint film light is plentiful, wear-resisting, anti-, chemical-resistant reagent, has defencive function and decorate properties concurrently, and purposes is very extensive.But polyurethane coating mostly is solvent-borne type at present, and washing construction equipment and container all adopt dimethylbenzene, lacquer thinner etc., and workmen and environment are brought safety and pollution problem.
The objective of the invention is in order to provide a kind of simple method to prepare hydrophilic polyurethanes coating, make its high-performance that had both had solvent based coating, but construction equipment and container can wash by water all, to alleviate the stimulation of solvent to human body, reduce construction cost, reduce pollution environment.
In order to make coating possess hydrophilic property of the present invention, must in this polymer, introduce a large amount of high polar chain links, once (J 58225115 to adopt similar approach to prepare sealing material, sealing agent, soil stabilizer etc. abroad, J 58157876), do not prepare a kind of hydrophilic polyurethanes coating that can wash by water construction equipment and container but find this polymer chance emulsifying water dispersive performance of document utilization.
The hydrophilic quality of coating of the present invention depends on polarity segmental type, functional group, molecular weight, content and the degree of crosslinking of being introduced.
Hydrophilic polyurethanes coating of the present invention is by 20～30%(weight) polyisocyanates, 15～25%(weight) polyether glycol, 5～10%(weight) Viscotrol C and other auxiliary reagent etc. in 0.08～0.18%(weight) retardant in the presence of, with the simple process preparation and get.
As the polyisocyanates composition can be tolylene diisocyanate, diphenylmethanediisocyanate etc.
It is 800～8000 the oxyethane polyethers or the block polyether of oxyethane and propylene oxide that polyether glycol has 2～4 functional groups, molecular weight by (A); (B) have 3～6 functional groups, molecular weight is that the block polyether or the propylene oxide polyethers of 500～3000 oxyethane and propylene oxide formed.
The adding of Viscotrol C is in order to increase paint film toughness and to reduce cost.
In reaction process, to add retardant, and make full and uniform dispersion, otherwise implode will occur.Retardant is an acidic cpd, as acetyl chloride, benzene sulfonyl chloride, sulfuric acid, phosphoric acid etc.
When preparation coating of the present invention, the charge temperature of polyisocyanates is 20 ℃～40 ℃, and temperature of reaction is 1～2 hour 80 ℃～100 ℃ reaction times.
According to the coating of the present invention's preparation, owing to have a large amount of high polar chain links in this polyurethane molecular, so wetting ability is very strong, once meeting water dispersion and emulsion at once, so can rinse well with tap water immediately.
Coating of the present invention belongs to single component, wet-cured type, easy construction.Plentiful, wear-resisting, anti-boiling hot, the chemical-resistant reagent of paint film light also can be formed various popular colour polyurethane coating with mill base.
The present invention since provide a kind of can the water cleaning means and the hydrophilic polyurethanes coating of container, in the decorative engineering of various lots of building, light industry, chemical industry, machinery, instrument and furniture etc., will obtain good economic benefits and social benefit.
Embodiments of the invention 1:
In reaction vessel, add 707 parts of dimethylbenzene, 420 parts of dibutyl phthalates, 276 parts of propylene oxide polyethers, 419 parts of oxyethane polyethers, 259 parts of Viscotrol C successively, be heated to 50 ℃～60 ℃ then, make dissolving evenly.Be cooled to 30 ℃～40 ℃, add 0.16% acetyl chloride, stir.Under this temperature, add 982 parts of tolylene diisocyanates.The reaction nature is warming up to 50 ℃～60 ℃, is heated to 80 ℃～100 ℃ then, keeps 1～2 hour.Cooling, an amount of dimethylbenzene thinner of adding filter discharging, are stored in the encloses container.
Claims (5)
1, the present invention is a kind of hydrophilic polyurethanes coating and preparation method.It is characterized in that this coating by the Viscotrol C of the polyether glycol, 5～10% (weight) of the polyisocyanates, 15～25% (weight) of 20～30% (weight) and other auxiliary reagent etc. in the presence of the retardant of 0.08～0.18% (weight), with the simple process preparation and get.
2, it is characterized in that by the described coating of claim 1 polyisocyanates is tolylene diisocyanate, diphenylmethanediisocyanate etc.
3, it is characterized in that by the described coating of claim 1 it is 800～8000 the oxyethane polyethers or the block polyether of oxyethane and propylene oxide that polyether glycol has 2～4 functional groups, molecular weight by (A); (B) have 3～6 functional groups, molecular weight is that the block polyether or the propylene oxide polyethers of 500～3000 oxyethane and propylene oxide formed.
4,, it is characterized in that adding 0.08～0.18%(weight by the described preparation method for coating of claim 1) retardant, it is a kind of acidic cpd, as acetyl chloride, benzene sulfonyl chloride, sulfuric acid, phosphoric acid etc.
5, by the described preparation method for coating of claim 1, it is characterized in that technology is easy, the charge temperature of polyisocyanates is 20 ℃～40 ℃, and temperature of reaction is at 80 ℃～100 ℃, and the reaction times is 1～2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102902 CN87102902A (en) | 1987-04-17 | 1987-04-17 | Hydrophilic polyurethanes coating and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102902 CN87102902A (en) | 1987-04-17 | 1987-04-17 | Hydrophilic polyurethanes coating and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87102902A true CN87102902A (en) | 1988-10-26 |
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ID=4814168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102902 Pending CN87102902A (en) | 1987-04-17 | 1987-04-17 | Hydrophilic polyurethanes coating and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87102902A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293119C (en) * | 2002-02-18 | 2007-01-03 | 拜尔材料科学股份公司 | Aqueous coating composition based on epoxybutene polyethers |
| CN104736605A (en) * | 2012-09-28 | 2015-06-24 | 巴斯夫欧洲公司 | Water-emulsible isocyanates having improved gloss |
| CN105960441A (en) * | 2014-01-24 | 2016-09-21 | 关西涂料株式会社 | Coating composition for forming coating film having impact resistance |
-
1987
- 1987-04-17 CN CN 87102902 patent/CN87102902A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293119C (en) * | 2002-02-18 | 2007-01-03 | 拜尔材料科学股份公司 | Aqueous coating composition based on epoxybutene polyethers |
| CN104736605A (en) * | 2012-09-28 | 2015-06-24 | 巴斯夫欧洲公司 | Water-emulsible isocyanates having improved gloss |
| CN105960441A (en) * | 2014-01-24 | 2016-09-21 | 关西涂料株式会社 | Coating composition for forming coating film having impact resistance |
| CN105960441B (en) * | 2014-01-24 | 2019-04-16 | 关西涂料株式会社 | It is used to form the coating composition of the film with impact resistance |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |