CN1278539A - Water-dispersed hydroxyl polyurethane and water-thinned two-component polyurethane paint composed thereby - Google Patents
Water-dispersed hydroxyl polyurethane and water-thinned two-component polyurethane paint composed thereby Download PDFInfo
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- CN1278539A CN1278539A CN 00116990 CN00116990A CN1278539A CN 1278539 A CN1278539 A CN 1278539A CN 00116990 CN00116990 CN 00116990 CN 00116990 A CN00116990 A CN 00116990A CN 1278539 A CN1278539 A CN 1278539A
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Abstract
The present invention relates to a composition of hydroxypolyurethane water dispersion, and its preparation process and water two-component polyurethane coating material formed from it. Said hydroxypolyurethane water dispersion is made up by using high-branched hydroxyl capped polyurethane, non-ionic surfactant, deionized water and pH valve regulating agent through a certain preparation process, the pH value of said water dispersion is 7-8. The key of said technological process is the preparation of high-branched hydroxyl capped polyurethane, and the coating film of said water two-component polyurethane coating material formed from said water dispersion can be solidified at normal temp, and possesses excellent water-proofing property, resistance to solvent, acid-resistance, alkali-resistance, abrasion performance, high lustre and high hardness.
Description
The aqueous polyurethane coating with bi component of hydroxyl polyurethane water dispersion of the present invention and composition thereof relates to a kind of composition and manufacturing process of hydroxyl polyurethane water dispersion, and mixes the aqueous polyurethane coating with bi component that forms by itself and aqueous dispersion type polymeric polyisocyanate.
Along with the establishment of various countries' environmental regulation and the enhancing of people's environmental consciousness, the discharging of the volatile organic compounds in traditional solvent based coating (VOC) more and more is restricted.Therefore, the low water-borne coatings that pollutes environment-friendly type of exploitation has become one of important directions of coating development.Water-borne coatings is to be a class coating of dispersion medium with water, have do not fire, nontoxic, free from environmental pollution, save advantage such as the energy.The development of the mono-component aqueous polyurethane coating of thermoplasticity early, though easy to use, satisfied mechanical property is also arranged, its anti-solvent, chemical resistance is not good enough.For this reason, the present invention proposes a kind of new technical scheme.
The objective of the invention is to: a kind of hydroxyl polyurethane water dispersion and by its aqueous polyurethane coating with bi component of forming is provided, make coating property near or reach the level of solvent borne polyurethane coating.
Purpose of the present invention can be achieved through the following technical solutions: a kind of hydroxyl polyurethane water dispersion consists of the following components: the highly branched hydroxy-end capped urethane of 20-40% weight part, and its acid number scope is 10-50, hydroxy radical content is 0.5-4%; The nonionogenic tenside of 0.2-2% weight part; The deionized water of 60-80% weight part; The pH value conditioning agent, the pH value that makes water dispersion is 7-8.
On the technique scheme basis, the pH value conditioning agent is the amine goods, comprises that triethylamine, dimethylethanolamine, thanomin, diethanolamine, trolamine etc. are as neutralizing agent.
On the technique scheme basis, the highly branched hydroxy-end capped urethane of described 20-40% weight part is formed through chemical reaction by following several components: functionality is that 2.5-5, hydroxyl value are the branched polyester polyvalent alcohol of 70-300, and its weight part is 40-70%; Dimethylol propionic acid, its weight part are 2-10%; Isocyanate-monomer, its weight part are 20-60%; Further branching and end-capping reagent, its weight part is 1-10%.Wherein, isocyanate-monomer comprises aromatic series and aliphatic isocyanates, as: TDI, MDI, HDI, IPDI, HMDI etc.; Described further branching and end-capping reagent are meant that functionality is polyvalent alcohol or the polyester polyol more than 2.5, as: TriMethylolPropane(TMP), tetramethylolmethane etc.Because dispersion is made up of highly branched hydroxy-end capped urethane, after the aqueous dispersion type polymeric polyisocyanate is crosslinked, has very high cross-linking density, formed filming has very high hardness, and good quick-drying.
On the technique scheme basis, the manufacturing process system of hydroxyl polyurethane water dispersion adopts acetone method, add polyester polyol, dimethylol propionic acid and isocyanate-monomer in the reactor in proportion, making solvent reaction with acetone is detected to no longer including hydroxyl, add further branching and end-capping reagent, reaction is detected to no longer including isocyanate functional groups, adds the amine neutralization, adds the water-dispersion that contains nonionogenic tenside.Adopt the hydroxyl polyurethane water dispersion of this technology manufacturing to have and surpass the stability in storage in 1 year.
On the technique scheme basis, the aqueous polyurethane coating with bi component of forming by the hydroxyl polyurethane water dispersion, comprise linking agent, characteristics are: get described hydroxyl polyurethane water dispersion, ratio in OH: NCO=1: 1-2 adds water-dispersed polyisocyanic ester cross-linking agent, manually can stir, and have long stability, and not phase-splitting or layering.
On the technique scheme basis, described water-dispersed polyisocyanic ester cross-linking agent is polymeric polyisocyanate to be added chemical modifier carry out chemical reaction and form.
Waterborne two-component polyurethane coating is divided into two big components, one is the water-based hydroxyl polymeric constituent, another is an aqueous dispersion type or can be by water-based hydroxyl component emulsive polyisocyanate component, the two can be in the normal temperature or the down crosslinking curing film forming of heating, make its performance near or reach the level of solvent borne polyurethane coating.
Superiority of the present invention is: a kind of oligosaprobic aqueous polyurethane coating is provided, the every performance that makes water-borne coatings near or reach the level of solvent borne polyurethane coating, film and to solidify at normal temperatures, have excellent water-fast, anti-solvent, acid and alkali-resistance, wear resisting property, high gloss, high rigidity.
Describe in detail below by embodiment.
Embodiment: the hydroxyl polyurethane water dispersion consists of the following components: the polyester polyol of 55 parts of weight, its hydroxyl value is 150, the dimethylol propionic acid of 5 parts of weight, the IPDI of 58 parts of weight, the acetone of some parts of weight, under 60-90 ℃ of condition, react and be detected to no longer including hydroxyl, the further branching and the end-capping reagent TriMethylolPropane(TMP) that add 8 parts of weight, reaction is detected to no longer including isocyanate functional groups, it is 7-8 that adding amine is neutralized to pH value, and then the deionized water of adding dissolving in advance 0.8 gram nonionogenic tenside disperses.Extract acetone out under the vacuum, and make the present invention's water dispersion.Application examples: get above hydroxyl polyurethane water dispersion, in OH: NCO=1: the ratio of 1.5 (mol ratios) adds water-dispersed polyisocyanic ester cross-linking agent, stirs, and thin up is to brushing viscosity, by State Standard of the People's Republic of China's making sheet with carry out film performance test, the result is as follows:
Gloss, 60 °: 98
Pencil hardness: 2H
Water tolerance: 120h no change
Alcohol resistance (immersing in 50% ethanol): 8h no change
The gasoline of anti-90#: 120h no change
Anti-kerosene: 120h no change
Acid resistance (immersing in 5% sulfuric acid): 24h no change
Alkali resistance (immersing in 10% yellow soda ash): 48h no change
Wear resistance (750g/500r): 10mg.
Claims (5)
1, a kind of hydroxyl polyurethane water dispersion is characterized in that: consist of the following components: the highly branched hydroxy-end capped urethane of 20-40% weight part, and its acid number scope is 10-50, hydroxy radical content is 0.5-4%; The nonionogenic tenside of 0.2-2% weight part; The deionized water of 60-80% weight part; The pH value conditioning agent, the pH value that makes water dispersion is 7-8.
2, according to the described hydroxyl polyurethane water dispersion of claim l, it is characterized in that: the pH value conditioning agent is an organic amine, comprises a kind of in triethylamine, dimethylethanolamine, thanomin, diethanolamine, the trolamine etc.
3, according to the described hydroxyl polyurethane water dispersion of claim l, it is characterized in that: the highly branched hydroxy-end capped urethane of 20-40% weight part is formed through chemical reaction by following several parts: functionality is that 2.5-5, hydroxyl value are the branched polyester polyvalent alcohol of 70-300, and its weight part is 40-70%; Dimethylol propionic acid, its weight part are 2-10%: isocyanate-monomer, its weight part are 20-60%.Further branching and end-capping reagent: its weight part is 1-10%.
4, according to claim 1,3 described hydroxyl polyurethane water dispersions, it is characterized in that: adopt acetone method, add polyester polyol, dimethylol propionic acid and isocyanate-monomer in the reactor in proportion, make solvent reaction with acetone and be detected to no longer including hydroxyl, add further branching and end-capping reagent, reaction is detected to no longer including isocyanate functional groups, add the amine neutralization, add the water-dispersion that contains nonionogenic tenside.
5, aqueous polyurethane coating with bi component according to claim 1,4 described hydroxyl polyurethane water dispersions are formed comprises linking agent, it is characterized in that: get described hydroxyl polyurethane water dispersion, ratio in OH: NCO=1: 1-2 adds water-dispersed polyisocyanic ester cross-linking agent, stirs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116990 CN1278539A (en) | 2000-07-04 | 2000-07-04 | Water-dispersed hydroxyl polyurethane and water-thinned two-component polyurethane paint composed thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116990 CN1278539A (en) | 2000-07-04 | 2000-07-04 | Water-dispersed hydroxyl polyurethane and water-thinned two-component polyurethane paint composed thereby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1278539A true CN1278539A (en) | 2001-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00116990 Pending CN1278539A (en) | 2000-07-04 | 2000-07-04 | Water-dispersed hydroxyl polyurethane and water-thinned two-component polyurethane paint composed thereby |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638512B (en) * | 2009-05-25 | 2011-04-20 | 杭州康成皮革有限公司 | Organic silicon-fluorine modified resin and coating preparation method |
| CN104903375A (en) * | 2013-01-07 | 2015-09-09 | 巴斯夫欧洲公司 | Catalysts for polyurethane coating compounds |
| CN105694792A (en) * | 2014-12-15 | 2016-06-22 | H.B.富乐公司 | Reactive adhesive with enhanced adhesion to metallic surfaces |
| CN106243987A (en) * | 2016-08-27 | 2016-12-21 | 彩城（惠州）化工有限公司 | A kind of for protection and art metal and the Nano type water paint of plastic parts |
| CN109503798A (en) * | 2017-09-14 | 2019-03-22 | 乐陵思盛聚合物材料有限公司 | The preparation of high hydroxyl content polyurethane aqueous dispersion body |
-
2000
- 2000-07-04 CN CN 00116990 patent/CN1278539A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638512B (en) * | 2009-05-25 | 2011-04-20 | 杭州康成皮革有限公司 | Organic silicon-fluorine modified resin and coating preparation method |
| CN104903375A (en) * | 2013-01-07 | 2015-09-09 | 巴斯夫欧洲公司 | Catalysts for polyurethane coating compounds |
| CN105694792A (en) * | 2014-12-15 | 2016-06-22 | H.B.富乐公司 | Reactive adhesive with enhanced adhesion to metallic surfaces |
| CN105694793A (en) * | 2014-12-15 | 2016-06-22 | H.B.富乐公司 | Reactive adhesive capable of improving metal surface |
| CN106243987A (en) * | 2016-08-27 | 2016-12-21 | 彩城（惠州）化工有限公司 | A kind of for protection and art metal and the Nano type water paint of plastic parts |
| CN109503798A (en) * | 2017-09-14 | 2019-03-22 | 乐陵思盛聚合物材料有限公司 | The preparation of high hydroxyl content polyurethane aqueous dispersion body |
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