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Radiation curable aqueous dispersions

A technology of radiation curing and dispersion, which is applied in the field of obtaining it, can solve the problems of undisclosed radiation curable composition, etc., and achieve the effect of long service life and good surface curing

Active Publication Date: 2014-02-26
CYTEC SURFACE SPECIALTIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Said document does not disclose radiation curable compositions

Method used

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  • Radiation curable aqueous dispersions
  • Radiation curable aqueous dispersions

Examples

Experimental program
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Effect test

Embodiment 1

[0205] Example 1: Preparation of a dispersion comprising acrylated polyurethane prepolymer A1.

[0206] In a double-walled glass reactor equipped with a mechanical stirrer, a thermocouple, an evaporative condenser and a dropping funnel, 37.8 g of polyester polyol (which has an average molecular weight of 670, a hydroxyl value of 167 mgKOH / g, and was obtained from neopentyl glycolate polycondensation of alcohol with a mixture of adipic and isophthalic acids in a 1:1 weight ratio), 91 g of acrylic acid adduct of bisphenol A diglycidyl ether (BPAAA), 28.6 g of dimethylol propionic acid (DMPA), 192.7g of 1,1'-methylenebis(4-isocyanatocyclohexane) (H12MDI), 223g of acetone, 3.3g of 622 and 0.5g of dibutyltin laurate in 10wt% acetone solution. The reaction mixture was heated with stirring up to 600° C. and kept at reflux until the isocyanate content reached a value of 1.09 meg / g. 0.4 g of 4-methoxyphenol (dissolved in 319 g of a reaction mixture of dipentaerythritol tetraacrylat...

Embodiment 2

[0208] Example 2: Preparation of a dispersion comprising acrylated polyurethane prepolymer A2.

[0209] In the double-wall glass reactor equipped with mechanical stirrer, thermocouple, evaporative condenser and dropping funnel, add the polyester polyol of 170.42g (the about 670 Daltons of its average molecular weight, 167mg KOH / g of hydroxyl value, and polycondensation of adipic acid and neopentyl glycol), 47.72 g of dimethylolpropionic acid, 21.98 g of cyclohexanedimethanol, 319.88 g of 1,1'-methylenebis(4-isocyanate Cyclohexane) (H12MDI), 240 g of acetone and 0.8 g of dibutyltin laurate in 10%wt acetone. The reaction mixture was heated to reflux with stirring and kept at reflux until the isocyanate content reached a value of 1.47 meq / g. Then 0.51 g of 4-methoxyphenol (which is dissolved in 220.75 g of DTMPTA and has a hydroxyl value of 137 mg KOH / g) is slowly added to the reactor, DTMPTA is a compound containing di(trimethylol)propane triacrylate and di(trimethylol)propa...

Embodiment 3

[0211] Example 3: Preparation of a dispersion comprising mercapto-functional polyurethane B.

[0212] Into a double-walled glass reactor equipped with a mechanical stirrer, thermocouple, evaporative condenser, and dropping funnel was charged 88.6 g of polyester polyol with an average molecular weight of about 670 Daltons (via adipic acid and neopentyl glycol polycondensation), 18.08g of dimethylolpropionic acid, 15.81g of cyclohexanedimethanol, 177.47g of 1,1'-methylenebis(4-isocyanatocyclohexane) (H12MDI) , 100 g of acetone and 0.4 g of acetone solution (10 wt %) of dibutyltin laurate as a reaction catalyst. The reaction mixture was heated to reflux with stirring and the condensation process was maintained until the isocyanate content reached 1.47 meq / g. Thereafter the mixture was further diluted with 232 g of acetone. The polyurethane prepolymer was cooled to 55°C. 199.3 g of trimethylolpropane trimercaptopropionate (tmpmp) and 0.83 g of triethylamine were added to the ve...

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Abstract

An aqueous dispersion comprising a mixture of a first dispersion and a second dispersion, said first dispersion comprising at least one (meth)acrylated pre-polymer (A), and said second dispersion comprising at least one thiol-functional compound (B), said aqueous dispersion optionally comprising at least one ethylenically unsaturated compound (C).

Description

technical field [0001] The present invention relates to the field of long wavelength radiation curable aqueous dispersions and to a process for obtaining them. Background of the invention [0002] It has long been known that radiation-curable polymer dispersions and especially polyurethane dispersions are able to provide coatings for different substrates such as wood, plastics and metals which exhibit good mechanical and chemical resistance and some flexibility. [0003] Ethylenically unsaturated polyurethanes have been produced by the capping reaction of isocyanate-terminated polyurethane prepolymers with ethylenically unsaturated monomers, especially (meth)acrylated monomers. Ethylenically unsaturated polyurethanes can also be made by chain-extending isocyanate-terminated ethylenically unsaturated polyurethane prepolymers with polyamines. [0004] A disadvantage of known (meth)acryloyl-functional dispersions is that they provide good Limitations in surface curing. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/14C08G18/83
CPCC08G18/0823C08G18/4238C08G18/672C09D175/16C08G18/758C08G18/348C08G18/12C08G18/4211C08L33/14C08G18/6659C08G18/3876C08L75/04
Inventor M·蒂耶勒曼S·卡佩莱S·佩特斯L·德皮特
Owner CYTEC SURFACE SPECIALTIES INC
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