Aqueous coating composition and anti-glare coating formed therefrom
A technology of water-based coatings and compositions, applied in the direction of coatings, anti-reflective coatings, etc., can solve problems such as poor dispersion, information loss, coating feeling or rough touch
Active Publication Date: 2016-12-28
ROHM & HAAS CO
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- Abstract
- Description
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Problems solved by technology
However, there are two problems with the use of inorganic fillers
First, the refractive index of the inorganic filler may differ significantly from that of the binding polymer or the dispersion of the inorganic material may be poor; in both cases this leads to the development of haze in the coating which also leads to Loss of product details, i.e. information pertaining to the contents of the package
Second, inorganic fillers are generally hard and this results in a coating that is naturally rough in feel or touch
Optimum aesthetic value for anti-glare packaging cannot be achieved with inorganic fillers in coatings
Method used
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Examples
Experimental program
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Effect test
example 1 and comparative example A-B
[0110] Example 1 and Comparative Examples A-B. Formation of Waterborne Coating Compositions and Evaluation of Dry Coatings
[0111] Example 1 and Comparative Examples A-B were formed, each having a dry weight ratio of first, second or first and second solid polymer particles to third solid polymer particles of 55 / 45. The quantities are presented in Table 1.1 below.
[0112] Table 1.1. Ingredients Used in Waterborne Coating Compositions
[0113]
[0114] The waterborne coating composition was applied by a gravure cylinder at about 1.5 lbs / ream (2.43 gsm) on 2 mil MYLAR TM (PET) sheet on an 8 inch by 10 inch area. Gloss and opacity readings are the average of five readings taken at various locations on the coatings presented in Table 1.2.
[0115] Table 1.2. Dry coating formation
[0116] sample
roller
apply weight
visual assessment
Comparative example A
150Q; 14.8BCM
2.33gsm
Optically unacceptable due to poor wetting
Example...
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Abstract
The present invention provides an aqueous coating composition comprising: a specified amount of certain first solid polymer particles having an average diameter of 0.60-0.99 μm; certain second solid polymer particles having an average diameter of 2-20 μm and mixtures thereof and third solid polymer particles having a calculated Tg of -60°C to 120°C and an average particle diameter of 50nm to 500nm; wherein said second solid polymer particles have a K10 value of less than 1.9E+10N / m2; wherein The difference between the refractive index of the outer surface of the second solid polymer particle and the refractive index of the third solid polymer particle is between 10E-4 and 10E-2; and wherein the aqueous coating composition The material contains less than 10% by volume of inorganic filler particles. Also provided is a method for providing a coating from the aqueous coating composition and the low glare coating so formed.
Description
technical field [0001] The present invention relates to an aqueous coating composition, a method for providing a coating therefrom, and an antiglare polymer coating. In particular, the present invention relates to an aqueous coating composition comprising: first solid polymer particles selected from the group consisting of: multi-level graded refractive index (grin) constituents having an average diameter of 0.60-0.99 μm Copolymer particles, having an average diameter of 0.60-0.99 μm and a calculated glass transition temperature (T g ) are rubbery core multi-stage copolymer particles of 20°C or less, and mixtures thereof; second solid polymer particles selected from the group consisting of: multi-stage graded-refractive index ( grin) constitutive copolymer particles having an average diameter of 2-20 μm and a calculated glass transition temperature (T g ) multi-stage copolymer particles having a rubbery core of 20°C or less, and mixtures thereof; and third solid polymer part...
Claims
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IPC IPC(8): C09D151/00C09D5/00C08F285/00
CPCC08F265/06C08F285/00C09D5/006C09D151/003C08L2205/025C08L2205/03C08L2201/10C08L2203/16C08L2207/53C08L51/003C08F220/1802C08F220/06C08F220/1804C08F220/40C08F222/102C08F220/18C09D5/00C09D151/00C09D133/02
Inventor N·N·卡梅E·拉弗勒P·S·马宗达E·H·侬杰塞
Owner ROHM & HAAS CO