CN104893540A - Preparation method of light-resistant and waterproof waterborne polyurethane paint - Google Patents
Preparation method of light-resistant and waterproof waterborne polyurethane paint Download PDFInfo
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- CN104893540A CN104893540A CN201510374603.2A CN201510374603A CN104893540A CN 104893540 A CN104893540 A CN 104893540A CN 201510374603 A CN201510374603 A CN 201510374603A CN 104893540 A CN104893540 A CN 104893540A
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Abstract
The invention discloses a preparation method of light-resistant and waterproof waterborne polyurethane paint. The preparation method includes: with existence of dibutyltin dilaurate, mixing polytetrahydrofuran glycol with isophorone diisocyanate to obtain polyurethane prepolymer A; adding chain extender and acetone solvent into the prepolymer A, adding triethylamine for neutralizing, adding resveratrol, substance B, substance C and sorbitol, reacting for 1h, and adding water, sodium dodecyl sulfate and nitrilotriacetic acid trisodium salt for emulsion for 60min to obtain the light-resistant and waterproof waterborne polyurethane paint. The light-resistant and waterproof waterborne polyurethane paint is environment friendly and low in cost, can be widely applied to surfaces of walls, furniture and metal utensils and can serve as a binder for plastic, glass, papermaking and spinning.
Description
Technical field
The present invention relates to the preparation method of polyurethane coating, particularly fast light with water-repellancy aqueous polyurethane coating and the preparation method of sizing agent.
Background technology
Water-proof material main application fields comprises the roofing of building construction, underground, exterior wall and indoor; The public works such as urban road bridges and the underground space; The bridge of motorway and high-speed railway, tunnel; The traffic engineering such as sub.; The hydro projects such as flume, reservoir, dam body, natural flow station and water treatment, are applicable between roofing and lavatory bath, the waterproof of vault, water reservoir, metope, antiseepage, protection against the tide.Divide according to application material and can be used for the fields such as papermaking, weaving, leather.
Urethane carries out synthesizing the normal dibutyl tin laurate that adopts and makees catalyzer, but works the mischief to environment in the degraded along with urethane due to Heavy Metal, Sn, and the toxicity reducing catalyzer is a great problem in urethane synthesis.
Aqueous polyurethane (also known as waterbased urethane) is a kind of urethane resin containing hydrophilic radical in the molecular chain of urethane, has very strong affinity, adopt specific technique can make it disperse in water and form stable system with glassware for drinking water.Aqueous polyurethane is mainly used in the aspects such as leather finish, textile printing and dyeing, paper-making industry, building external paint, tackiness agent, steel moulder's paint, involved field all with sunlight close contact, therefore, it is fast light under Changes in weather should be an important technology index of coating.
Summary of the invention
Technical problem to be solved by this invention is, there is provided a kind of fast light with water-repellancy aqueous polyurethane coating and the preparation method of sizing agent, dibutyl tin laurate is selected to make catalyzer, trans-resveratrol, substance B reduce the xanthochromia of urethane, utilize substance C to carry out waterproof, can prepare and there is fast light aqueous polyurethane coating with water-repellancy and sizing agent.
Fast light with water-repellancy aqueous polyurethane coating and a preparation method for tackiness agent, it is characterized in that:
(1) under dibutyl tin laurate existent condition, by PTMG and isophorone diisocyanate 1:1.5 ~ 1 by weight: 3.8 mix, 1 ~ 5h is reacted at 70 ~ 90 DEG C, obtain base polyurethane prepolymer for use as A, described dibutyl tin laurate consumption is 0.12 ~ 0.32% of PTMG and isophorone diisocyanate gross weight;
(2) chainextender of performed polymer A weight 1 ~ 3.6% and the acetone solvent of performed polymer A weight 18 ~ 25% is added to performed polymer A, 2 ~ 4h is reacted under 70 ~ 90 DEG C of conditions, add performed polymer A weight be 10 ~ 18% triethylamine carry out neutralization reaction 30 ~ 60min, add trans-resveratrol, substance B, substance C and Sorbitol Powder, in 80 DEG C of reaction 1h, add water, sodium laurylsulfonate and nitrilotriacetic acid trisodium salt carry out emulsification 60min, fast light with water-repellancy aqueous polyurethane coating and sizing agent, substance B, substance C is respectively 1% and 1% of performed polymer A weight, sodium laurylsulfonate and nitrilotriacetic acid trisodium salt are 0.2 ~ 0.5% and 0.1 ~ 0.2% of performed polymer A weight, trans-resveratrol and Sorbitol Powder are respectively 2% and 0.4% of performed polymer A weight.
The molecular weight of PTMG is 2000g/mol; Chainextender is any one in dimethylol propionic acid, dimethylolpropionic acid; Substance B is any one in ziram, phosphorodithioic acid diethyl ester, triisopropyl phosphite; Substance C is any one in potassium methyl silicate, sodium methyl silicate.
The present invention has following characteristics:
(1) trans-resveratrol is bought in Jing Zhu bio tech ltd, Nanjing;
(2) potassium methyl silicate, sodium methyl silicate are selected from Ying Zhi organosilicon material company limited of Foshan City, but performance of the present invention selects other producers to be also applicable to;
(3) potassium methyl silicate, sodium methyl silicate do water-proof material, and trans-resveratrol and substance A suppress urethane jaundice;
(4) nitrilotriacetic acid trisodium and nitrilotriacetic acid trisodium salt salt monohydrate called in the Chinese of nitrilotriacetic acid trisodium salt, Sorbitol Powder another name sorbyl alcohol;
(5) sorbyl alcohol reduces the toxicity of di lauric dibutyl, is fixed it;
(6) N-salicylic amide phthalimide comes from Jiangsu flood Xinghua factory, mainly plays the effect of inhibited oxidation jaundice (fast light);
embodimentthe present invention is further illustrated below in conjunction with example.
example one
(1) in the 500ml there-necked flask of stirring rod, thermometer, dibutyl tin laurate 0.15g is added, by PTMG 50g and isophorone diisocyanate 75g, 1h is reacted at 70 DEG C, obtain 124.9g base polyurethane prepolymer for use as A, the molecular weight of described PTMG is 2000g/mol;
(2) dimethylol propionic acid 1.25g and acetone solvent 22.5g is added to base polyurethane prepolymer for use as A, 2h is reacted under 70 DEG C of conditions, add triethylamine 12.5g at 70 DEG C and carry out neutralization reaction 30min, trans-resveratrol 2.5g, ziram 1.25g, potassium methyl silicate 1.25g and Sorbitol Powder 0.5g is added at 75 DEG C, in 80 DEG C of reaction 1h, add water 120g, sodium laurylsulfonate 0.25g and nitrilotriacetic acid trisodium salt 0.12g, 80 DEG C are carried out emulsification 60min, obtain fast light with water-repellancy aqueous polyurethane coating and sizing agent.
Example two
(1) in the 500ml there-necked flask of stirring rod, thermometer, dibutyl tin laurate 0.46g is added, PTMG 30g is mixed with isophorone diisocyanate 114g, 5h is reacted at 90 DEG C, obtain base polyurethane prepolymer for use as A143.6g, the molecular weight of described PTMG is 2000g/mol;
(2) dimethylolpropionic acid 5.17g and acetone 35.9g is added to base polyurethane prepolymer for use as A, 4h is reacted under 90 DEG C of conditions, 90 DEG C add triethylamine 25.8g and carry out neutralization reaction 60min, add trans-resveratrol 2.87g, phosphorodithioic acid diethyl ester 1.43g, sodium methyl silicate 1.43g and Sorbitol Powder 0.57g, in 80 DEG C of reaction 1h, add water 120g, sodium laurylsulfonate 0.72g and nitrilotriacetic acid trisodium salt 0.29g, and 80 DEG C are carried out emulsification 60min, obtains fast light with water-repellancy aqueous polyurethane coating and sizing agent.
example three
(1) in the 500ml there-necked flask of stirring rod, thermometer, dibutyl tin laurate 0.32g is added, PTMG 40g is mixed with isophorone diisocyanate 106g, 3h is reacted at 80 DEG C, obtain base polyurethane prepolymer for use as A145.6g, the molecular weight of described PTMG is 2000g/mol;
(2) the dimethylol propionic acid 3.3g added to base polyurethane prepolymer for use as A and acetone solvent 31.3g, 3h is reacted under 80 DEG C of conditions, 80 DEG C add triethylamine 20.4g and carry out neutralization reaction 45min, add trans-resveratrol 2.9g, triisopropyl phosphite 1.45g, potassium methyl silicate 1.45g and Sorbitol Powder 0.58g, in 80 DEG C of reaction 1h, add water 130g, sodium laurylsulfonate 0.5g and nitrilotriacetic acid trisodium salt 0.2g, and 80 DEG C are carried out emulsification 60min, obtains fast light with water-repellancy aqueous polyurethane coating and sizing agent.
example four
(1) add dibutyl tin laurate 0.15g in the 500ml there-necked flask of stirring rod, thermometer, by PTMG 50g and isophorone diisocyanate 75g, at 70 DEG C, react 1h, obtain 124.9g base polyurethane prepolymer for use as A;
(2) dimethylol propionic acid 1.25g and acetone solvent 22.5g is added to base polyurethane prepolymer for use as A, 2h is reacted under 70 DEG C of conditions, add triethylamine 12.5g at 70 DEG C and carry out neutralization reaction 30min, trans-resveratrol 2.5g is added at 75 DEG C, phosphorodithioic acid diethyl ester 1.25g, sodium methyl silicate 1.25g, Sorbitol Powder 0.5g and sebacic acid two (1, 2, 2, 6, 6-pentamethvl alcohol) ester 0.21g, in 80 DEG C of reaction 1h, add water 130g, sodium laurylsulfonate 0.25g and nitrilotriacetic acid trisodium salt 0.12g, 80 DEG C are carried out emulsification 60min, fast light with water-repellancy aqueous polyurethane coating and sizing agent.
example five
(1) in the 500ml there-necked flask of stirring rod, thermometer, add dibutyl tin laurate 0.46g, PTMG 30g is mixed with isophorone diisocyanate 114g, at 90 DEG C, react 5h, obtain base polyurethane prepolymer for use as A143.6g;
(2) dimethylolpropionic acid 5.17g and acetone solvent 35.9g is added to performed polymer A, 4h is reacted under 90 DEG C of conditions, 90 DEG C add triethylamine 25.8g and carry out neutralization reaction 60min, add trans-resveratrol 2.87g, methyl orthophosphoric acid 1.43g, sodium methyl silicate 1.43g, Sorbitol Powder 0.57g and N-salicylic amide phthalimide 0.22g, in 80 DEG C of reaction 1h, add water 120g, sodium laurylsulfonate 0.72g and nitrilotriacetic acid trisodium salt 0.29g, 80 DEG C are carried out emulsification 60min, obtain fast light with water-repellancy aqueous polyurethane coating and sizing agent.
Beneficial effect of the present invention is further illustrated below by relevant experimental data:
Water-repellancy employing is got appropriate emulsion and is evenly coated on sheet glass, after drying and forming-film, sheet glass is put into deionized water under certain temperature to soak, observe film and become situation that is blue, that turn white, bubble, send out wrinkle, come off, market urethane is selected from environmental protection company limited of Jiangsu Netac.
Table one is fast light and waterproof polyurethane coating and sizing agent institute film forming properties
| Experimental group | Example one | Example two | Example three | Example four | Example five | Market urethane |
| Film outward appearance (water tolerance 48h) | Transparent | Transparent | Transparent | Transparent | Transparent | Transparent |
| Hardness | B | B | B | B | B | B |
| Sticking power/level | 2 | 3 | 3 | 3 | 3 | 2 |
| Snappiness/mm | 2 | 2 | 2 | 2 | 3 | 2 |
Can find from table one, from film outward appearance, hardness, sticking power, flexibility better performances.
Table two is fast light and the mechanical property of waterproof polyurethane coating and sizing agent gained film
| Experimental group | Example one | Example two | Example three | Example four | Example five | Market urethane |
| Elongation at break/% | 162 | 157 | 178 | 158 | 172 | 139 |
| Tensile strength/MPa | 5.8 | 5.9 | 5.5 | 6.7 | 6.7 | 5.4 |
| Abrasion resisting/level | 3.5 | 3.5 | 4 | 4.5 | 4.5 | 3.5 |
The reference of table two middle finger object detection method (Jiang Weiqi. leather finish physical and chemical inspection [M]. China Light Industry Press, 1999), coating gained film elongation at break of the present invention, tensile strength, wear-resistant all performances are better.
In order to the light fastness of quantitative description fatting agent, resistance to light of coating is weighed with its photostabilization for its film, adopts spectrophotometer to detect, to obtain inverse difference △ E, describes the photostabilization of film.△ E represents colour-change degree, and △ E is larger, and color change is more obvious.In general, △ E value is the slight change of 0 ~ 1.5 genus; △ E value is that 1.5 ~ 3.0 genus can feel change; △ E value be 3.0 ~ 6.0 belong to considerable changes (see Wang Fang, party's climax, Wang Liqin, the photodegradation [J] of several organic historical relic's protection polymer coating. Northwest University's journal, 2005,35 (5): 56 ~ 58).
Table three is fast light and the fast light effectiveness indicator of waterproof polyurethane coating and sizing agent gained film
| Time/min | Example one | Example two | Example three | Example four | Example five | Market urethane |
| 90 | 0.3 | 0.3 | 0.6 | 0.2 | 0.3 | 0.5 |
| 150 | 0.4 | 0.4 | 0.6 | 0.3 | 0.3 | 0.5 |
| 270 | 0.4 | 0.5 | 0.6 | 0.3 | 0.4 | 0.6 |
| 330 | 0.7 | 0.6 | 0.7 | 0.5 | 0.4 | 0.6 |
| 390 | 1.1 | 0.7 | 0.8 | 0.6 | 0.3 | 0.7 |
| 450 | 1.1 | 1.1 | 0.9 | 0.6 | 0.3 | 1.8 |
| 510 | 1.1 | 1.1 | 0.9 | 0.7 | 0.7 | 2.5 |
| 540 | 1.2 | 1.1 | 1.0 | 0.9 | 0.8 | 2.7 |
| 600 | 1.2 | 1.1 | 1.1 | 1.1 | 0.9 | 2.9 |
As can be seen from table three experimental data, employ sunproof polyurethane of the present invention, photostabilization index be improved significantly.
Claims (5)
1. fast light with water-repellancy aqueous polyurethane coating and a preparation method for tackiness agent, it is characterized in that:
(1) under dibutyl tin laurate existent condition, by PTMG and isophorone diisocyanate 1:1.5 ~ 1 by weight: 3.8 mix, 1 ~ 5h is reacted at 70 ~ 90 DEG C, obtain base polyurethane prepolymer for use as A, described dibutyl tin laurate consumption is 0.12 ~ 0.32% of PTMG and isophorone diisocyanate gross weight;
(2) chainextender of performed polymer A weight 1 ~ 3.6% and the acetone solvent of performed polymer A weight 18 ~ 25% is added to base polyurethane prepolymer for use as A, 2 ~ 4h is reacted under 70 ~ 90 DEG C of conditions, add performed polymer A weight be 10 ~ 18% triethylamine carry out neutralization reaction 30 ~ 60min, add trans-resveratrol, substance B, substance C and Sorbitol Powder, in 80 DEG C of reaction 1h, add water, sodium laurylsulfonate and nitrilotriacetic acid trisodium salt carry out emulsification 60min, fast light with water-repellancy aqueous polyurethane coating and sizing agent, substance B, substance C is respectively 1% and 1% of performed polymer A weight, sodium laurylsulfonate and nitrilotriacetic acid trisodium salt are 0.2 ~ 0.5% and 0.1 ~ 0.2% of performed polymer A weight, trans-resveratrol and Sorbitol Powder are respectively 2% and 0.4% of performed polymer A weight.
2. as claimed in claim 1 a kind of fast light with water-repellancy aqueous polyurethane coating and the preparation method of tackiness agent, it is characterized in that: the molecular weight of PTMG is 2000g/mol.
3. as claimed in claim 1 a kind of fast light with water-repellancy aqueous polyurethane coating and the preparation method of tackiness agent, it is characterized in that: chainextender is any one in dimethylol propionic acid, dimethylolpropionic acid.
4. as claimed in claim 1 a kind of fast light with water-repellancy aqueous polyurethane coating and the preparation method of tackiness agent, it is characterized in that: substance B is any one in ziram, phosphorodithioic acid diethyl ester, triisopropyl phosphite, methyl orthophosphoric acid.
5. as claimed in claim 1 a kind of fast light with water-repellancy aqueous polyurethane coating and the preparation method of tackiness agent, it is characterized in that: substance C is any one in potassium methyl silicate, sodium methyl silicate.
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Cited By (2)
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| CN105273675A (en) * | 2015-11-11 | 2016-01-27 | 国网山东郯城县供电公司 | Water-based fire-proof binding agent |
| CN108864922A (en) * | 2018-06-18 | 2018-11-23 | 段小宁 | The preparation method of fire-retardant, waterproof, fast light aqueous polyurethane coating and adhesive |
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- 2015-07-01 CN CN201510374603.2A patent/CN104893540A/en active Pending
Patent Citations (5)
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| CN103864985A (en) * | 2014-04-04 | 2014-06-18 | 段小宁 | Preparation method of light-resistant and flame-retardant coating and finishing paint |
| CN103952071A (en) * | 2014-05-04 | 2014-07-30 | 段小宁 | Preparation method of environment-friendly light-resistant and waterproof polyurethane coating and adhesive |
| CN104073145A (en) * | 2014-07-21 | 2014-10-01 | 段小宁 | Preparation method for lightproof and waterproof polyurethane coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105273675A (en) * | 2015-11-11 | 2016-01-27 | 国网山东郯城县供电公司 | Water-based fire-proof binding agent |
| CN108864922A (en) * | 2018-06-18 | 2018-11-23 | 段小宁 | The preparation method of fire-retardant, waterproof, fast light aqueous polyurethane coating and adhesive |
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