Pooyurethane dispersion in alcohol-water system

A polyurethane dispersion and the technology of the dispersion are applied in the directions of polyurea/polyurethane adhesives, body powders, preparations for skin care, etc., which can solve the problems such as no proposed utilization, and achieve the effect of improving hydrolysis stability.

Inactive Publication Date: 2003-09-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Neither of the techniques discussed above recognizes the importance of molecular weight control through the use of chain stoppers to impart cold seal adhesive properties, nor does it address the use of these materials in cosmetic or pharmaceutical formulations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0095] Examples 1 to 3 show how varying the ethanol-water ratio of a polyurethane dispersion changes the molecular weight, and thus the peel adhesion value.

[0096]Add the following components to a 1 liter reactor to make a batch of 600 grams: 120.6 grams (1.09 NCO equivalents) of isophorone diisocyanate; 147.6 grams (0.089 OH equivalents) of KRATON L-2203 hydrogenated polybutadiene diol (OH Equivalent weight 1660), from Shell Chemical Co., Houston, TX, USA; 296.4 grams (0.291 OH equivalent weight) TERATHANE 2000 polytetrahydrofuran diol (OH equivalent weight 1020) from EI. du Pont Co., Wilmington, DE, USA; 6 grams (0.05 OH equivalent) of SURFYNOL 104 surfactant, a diol (OH equivalent weight 113.2) from Air Products, Lehigh Valley, PA, USA; and 24 grams (0.110 equivalent) of the sulfopolyester diol prepared above Alcohol A. The opaque mixture was heated to about 80°C with stirring under nitrogen and 0.5 g of dibutyltin dilaurate catalyst was added. An exothermic reaction oc...

Embodiment 4 to 8

[0100] Examples 4 to 8 show how varying the weight ratio of chain extender to chain stopper affects the molecular weight of polyurethane dispersions.

[0101] According to the method used in Example 1, 78.8 grams (47.5 meq. OH) of KRATON L-2203 diol, 157.6 grams (154.5 meq. Base polyester diol B, and 51.5 grams (464.3 meq NCO) of isophorone diisocyanate were added to a 500 mL reactor, heated and stirred to about 80° C. under nitrogen. About two drops of dioctyltin dilaurate were added, and an exothermic reaction occurred to raise the temperature to about 87°C. After the reaction had proceeded for approximately 2.5 hours, the mixture was cooled slightly, and a 30-gram aliquot (with 22.2 milliequivalents of theoretical unreacted NCO) was charged to ethylenediamine (EDA, chain extender) and 2-amino-2-methyl-1-propanol (AMP, chain stopper) in various ratios in 100 mL bottles. The mixture was homogenized using an Omni Macro homogenizer from Omni International, Marietta, GA, USA. ...

Embodiment 9 and 10

[0104] According to the method used in Example 1, 46.7 grams (28.1 meq. OH) of KRATON L-2203 diol, 93.3 grams (91.5 meq. Base polyester diol B, and 40 grams (360.4 meq NCO) of isophorone diisocyanate were added to a 500 mL reactor, heated and stirred to about 80° C. under nitrogen. Add 1 drop of dioctyltin dilaurate, an exothermic reaction occurs and the temperature rises to about 82°C. After the reaction had proceeded for approximately 2 hours, the mixture was slightly cooled, and a 30-gram aliquot (with 26.1 milliequivalents of theoretical unreacted NCO) was charged to either 0.81 or 0.65 grams of 45 grams of 85:15 ethanol in water. (27 meq) EDA and 0.48 g (5.4 meq) AMP in a 100 mL bottle. Homogenize the mixture using an Omni Macro homogenizer. Comparative Examples A and B

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Abstract

Provided are a polyurethane dispersion and a preparation method thereof. The polyurethane dispersion can be stably dispersed in alcohol and water mixture. The dispersion comprises the reaction product of (a) at least one isocyanate-terminated polyurethane prepolymer comprising the reaction product of (i) at least one polyactive hydrogen insoluble in the alcohol Compounds, wherein the multi-active hydrogen compound is an alkyl, aryl or aralkyl structure optionally substituted by N, O and S; (ii) at least one polyisocyanate, and (iii) at least one soluble in the A polyactive hydrogen compound of a mixture of alcohol and water; (b) a polyfunctional chain extender; and (c) at least one chain stopper; wherein the equivalent ratio of the difunctional chain extender to prepolymer isocyanate is 0.60:1.20.

Description

technical field [0001] The present invention relates to a cold seal adhesive composition in the form of a stable polyurethane dispersion in an alcohol-water system. Background technique [0002] Polyurethane is a general term used to describe polymers prepared by reacting polyfunctional isocyanates and polyfunctional alcohols to form urethane linkages. The term "polyurethane" is also used in a more general sense to denote the reaction product of a polyisocyanate and any polyactive hydrogen compound including polyfunctional alcohols, amines, and thiols. Polyurethanes are used in many applications including as elastomers, adhesives, coatings and impregnants. [0003] For coating applications, polyurethane polymers can be dispersed in water by incorporating stabilizing groups on the backbone. Including anionic, cationic and nonionic dispersion stabilizing groups have been used. A variety of aqueous polyurethane dispersions have been prepared by those skilled in the art. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/16A61K8/00A61K8/02A61K8/06A61K8/30A61K8/34A61K8/37A61K8/39A61K8/41A61K8/42A61K8/46A61K8/49A61K8/72A61K8/81A61K8/85A61K8/86A61K8/87A61Q1/00A61Q1/02A61Q1/04A61Q1/06A61Q1/08A61Q1/10A61Q1/12A61Q3/02A61Q5/00A61Q5/02A61Q5/12A61Q17/00A61Q17/02A61Q17/04A61Q19/00C08G18/08C08G18/10C08G18/12C08G18/42C08G18/46C08G18/66C09J175/04C09J175/12
CPCA61K8/87A61Q1/02A61Q1/06A61Q1/08A61Q1/10A61Q3/02A61Q5/02A61Q5/12A61Q17/02A61Q17/04A61Q19/00C08G18/0804C08G18/0819C08G18/0861C08G18/12C08G18/3228C08G18/2825C08G18/08
Inventor 斯蒂芬·S·坎特纳马修·T·肖尔茨凯文·M·莱万多夫斯基
Owner 3M INNOVATIVE PROPERTIES CO
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