CN102391467A - Water-based cationic polyurethane bridging agent - Google Patents
Water-based cationic polyurethane bridging agent Download PDFInfo
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- CN102391467A CN102391467A CN2011102512227A CN201110251222A CN102391467A CN 102391467 A CN102391467 A CN 102391467A CN 2011102512227 A CN2011102512227 A CN 2011102512227A CN 201110251222 A CN201110251222 A CN 201110251222A CN 102391467 A CN102391467 A CN 102391467A
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Abstract
The invention discloses a water-based cationic polyurethane bridging agent. The water-based cationic polyurethane bridging agent is prepared by the following technological steps of: a, adding an N-methylpyrrolidone solvent, diphenylmethanediisocyanate (MDI) and a composite catalyst sequentially into a reactor and heating to 40 DEG C to dissolve the materials completely; b, adding trimethoprim (TMP) slowly in 0.5 to 2 hours, and heating to the temperature of between 30 and 70 DEG C to dissolve the TMP with stirring; and c, adding a cationic hydrophilic agent of diethanol amine, heating to the temperature of between 60 and 100 DEG C, reacting for 1 to 4 hours, cooling to the temperature of below 60 DEG C, adding a small amount of N,N-dimethylethanolamine for neutralization, stirring for 30 MDIn, adding deionized water, and stirring uniformly to obtain faint yellow transparent liquid. The water-based cationic polyurethane bridging agent reduces toxicity, improves water dispersibility of prepolymer, excellent heat treatment performance and storage stability, is suitable for industrialized production, can be widely applicable to crosslinking bridging agents of water-based coatings and dyes, and can also serve as a non-shrinking finishing agent for silk and wool.
Description
Technical field
The invention belongs to chemical field, relate in particular to the preparation of modified polyurethane material.
Background technology
Use as the crosslinked bridging agent of textile printing and dyeing fabric with the base polyurethane prepolymer for use as that has the NCO end group, require to have good sticking power, wear resistance, good toughness also need have water tolerance preferably.Aqueous polyurethane has above-mentioned advantage, and it is many that use urethane increases water-proof research.Traditional urethane bridging agent is difficult to direct emulsification or is scattered in the water, and the fabric face that when textile printing and dyeing is used, obtains shrinks severe.
Summary of the invention
The objective of the invention is to, a kind of low-free TDI content is provided, the agent of waterborne cation polyurethane New Bridge erecting, this bridging agent storage-stable, heat treatment performance is remarkable, is suitable for suitability for industrialized production.
For realizing the purpose of foregoing invention; The present invention adopts following technical scheme: a kind of waterborne cation type polyurethane bridging agent; It prepares through following technological step: a, in reactor drum, successively add N-Methyl pyrrolidone solvent, MDI and catalyst compounded; Be heated to 40 ℃ of dissolvings fully, this is catalyst compounded by triethylene diamine with zinc acetate is composite forms; B, slowly add TMP then, this process control is at 0.5 ~ 2h, and is heated to 30 ~ 70 ℃ of stirring and dissolving; C, then add cationic hydrophilic agent diethylolamine, and after being warming up to 60 ~ 100 ℃ of reaction 1 ~ 4h, cool to below 60 ℃; Add minor N, the N-dimethylethanolamine neutralizes, behind the stirring 30MDIn; Add deionized water, stir, obtain light yellow transparent liquid.
The weight ratio of said MDI and TMP is 2 ~ 4:1.
The mol ratio of said TMP and diethylolamine is 1～10:1.
Said catalyst compounded concentration is 80 ~ 2000ppm.
Beneficial effect: compared with prior art, the present invention has the following advantages: utilize the water-based POLYMETHYLENE POLYPHENYLISOCYANATE bridging agent of preparing method's preparation of a kind of waterborne cation polyurethane bridging agent of the present invention, reduced the side effect of bridging agent; Improve the water dispersible of performed polymer; Heat treatment performance is remarkable, and storage-stable is suitable for suitability for industrialized production; And can also can be used as the non-shrink treatment agent of silk hair adaptable across the crosslinked bridging agent of water-borne coatings, dyestuff; The present invention adopts by triethylene diamine and the composite catalyst compounded catalyzer as prepolymerization reaction that forms of zinc acetate, can reduce the content of free TDI effectively, further improves green environmental protection of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is done detailed description further, but the scope that the present invention requires to protect is not limited to the scope that embodiment representes.
Embodiment:
In clean dry and be equipped with in the container of condensing surface, add TMP (1.00kmol), diethylolamine (0.5kmol) and N-Methyl pyrrolidone solvent; Be mixed with the solution about 75%; Be warming up to 40 ℃-50 ℃, abundant stirring and dissolving is after thing to be mixed dissolves fully; Stop to stir, 40 ℃-50 ℃ of system temperature maintenances are for use.
In the reaction kettle of clean dry, condensing surface is installed, vacuumatic measuring adds MDI (5.2kmol), N-Methyl pyrrolidone and catalyst compounded (2.30kg), is mixed with the solution about 75%; Closed the big lid of hand-hole after finishing, started stirring and slowly be warming up to 90 ℃, treated that it dissolves fully, under the condition of 90 ℃ of temperature; Slowly drip the mixed solution of TMP and diethylolamine, dropping temperature is controlled at 90 ℃-100 ℃, and the dropping time is controlled at 1h-2.5h, after dropping finishes; At 105 ℃-125 ℃ reaction 1.5h, cooling, cooling, the oxyacetic acids (0.45kmol) that under being lower than 80 ℃, drip metering neutralize; Stir 0.5h, add deionized water (687kg), be cooled to room temperature, obtain faint yellow transparent dispersion liq product; Solids content 35.70%, viscosity >=1320mPa.s, pH value: about 6.2.Said catalyst compoundedly form according to the mol ratio of 2:1 is composite by triethylene diamine and zinc acetate.
Claims (4)
1. waterborne cation type polyurethane bridging agent; It is characterized in that through following technological step preparation: a, in reactor drum, successively add N-Methyl pyrrolidone solvent, MDI and catalyst compounded; Be heated to 40 ℃ of dissolvings fully, this is catalyst compounded by triethylene diamine with zinc acetate is composite forms; B, slowly add TMP then, this process control is at 0.5 ~ 2h, and is heated to 30 ~ 70 ℃ of stirring and dissolving; C, then add cationic hydrophilic agent diethylolamine, and after being warming up to 60 ~ 100 ℃ of reaction 1 ~ 4h, cool to below 60 ℃; Add minor N, the N-dimethylethanolamine neutralizes, behind the stirring 30MDIn; Add deionized water, stir, obtain light yellow transparent liquid.
2. according to the said waterborne cation type polyurethane of claim 1 bridging agent, it is characterized in that: the weight ratio of said MDI and TMP is 2 ~ 4:1.
3. according to the said waterborne cation type polyurethane of claim 1 bridging agent, it is characterized in that: the mol ratio of said TMP and diethylolamine is 1～10:1.
4. according to the said waterborne cation type polyurethane of claim 1 bridging agent, it is characterized in that: said catalyst compounded concentration is 80 ~ 2000ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102512227A CN102391467A (en) | 2011-08-30 | 2011-08-30 | Water-based cationic polyurethane bridging agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102512227A CN102391467A (en) | 2011-08-30 | 2011-08-30 | Water-based cationic polyurethane bridging agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102391467A true CN102391467A (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102512227A Pending CN102391467A (en) | 2011-08-30 | 2011-08-30 | Water-based cationic polyurethane bridging agent |
Country Status (1)
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| CN (1) | CN102391467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486894A (en) * | 2018-04-13 | 2018-09-04 | 上海浩登材料股份有限公司 | A kind of elastomeric water-based spinning bridging agent and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840812A (en) * | 1994-11-29 | 1998-11-24 | Wolff Walsrode Ag | Waterproof and breathable flat materials made from resin mixtures of thermoplastic polyurethane |
| CN101235130A (en) * | 2008-02-27 | 2008-08-06 | 烟台万华聚氨酯股份有限公司 | Cation water polyurethane emulsion and preparation method thereof |
| CN201235130Y (en) * | 2008-07-25 | 2009-05-13 | 山东省立医院 | Double-tampon quantitative endotracheal tube |
| CN101775120A (en) * | 2009-01-08 | 2010-07-14 | 周建明 | Curing agent diisocyanate prepolymer and preparation method thereof |
| CN101955575A (en) * | 2010-03-04 | 2011-01-26 | 广东嘉宝莉化工（集团）有限公司 | Polyurethane curing agent compounded by diphenylmethane diisocyanate and hydroxyl compound |
-
2011
- 2011-08-30 CN CN2011102512227A patent/CN102391467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840812A (en) * | 1994-11-29 | 1998-11-24 | Wolff Walsrode Ag | Waterproof and breathable flat materials made from resin mixtures of thermoplastic polyurethane |
| CN101235130A (en) * | 2008-02-27 | 2008-08-06 | 烟台万华聚氨酯股份有限公司 | Cation water polyurethane emulsion and preparation method thereof |
| CN201235130Y (en) * | 2008-07-25 | 2009-05-13 | 山东省立医院 | Double-tampon quantitative endotracheal tube |
| CN101775120A (en) * | 2009-01-08 | 2010-07-14 | 周建明 | Curing agent diisocyanate prepolymer and preparation method thereof |
| CN101955575A (en) * | 2010-03-04 | 2011-01-26 | 广东嘉宝莉化工（集团）有限公司 | Polyurethane curing agent compounded by diphenylmethane diisocyanate and hydroxyl compound |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486894A (en) * | 2018-04-13 | 2018-09-04 | 上海浩登材料股份有限公司 | A kind of elastomeric water-based spinning bridging agent and preparation method thereof |
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Application publication date: 20120328 |