Antifogging agent composition, and antifogging article with antifogging coating film

A composition and anti-fogging agent technology, applied in the direction of coating, etc., can solve the problems of reducing the brightness of the vehicle lamp, damaging the aesthetics of the lens surface, and user discomfort, achieving good anti-fogging performance, good curing reaction, and promoting curing reaction. Effect

Active Publication Date: 2019-01-01
NOF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the brightness of the lamp may decrease or the appearance of the lens surface may be damaged, which may cause discomfort to the user.

Method used

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  • Antifogging agent composition, and antifogging article with antifogging coating film
  • Antifogging agent composition, and antifogging article with antifogging coating film
  • Antifogging agent composition, and antifogging article with antifogging coating film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0097]

[0098] The copolymer (A) of the present invention is obtained by copolymerizing the monomer mixture. As the structure of the copolymer, it may be any structure of random copolymer, alternating copolymer, block copolymer and graft copolymer. From the viewpoint of the effect and the ease of preparation of the antifogging agent composition, a random copolymer is preferable. As the polymerization method for obtaining the copolymer, known various polymerization methods such as radical polymerization method, cationic polymerization method, anionic living polymerization method, cationic living polymerization method, etc. can be used, especially from the ease of industrial productivity, related From the viewpoint of various performances, the radical polymerization method is preferable. As the radical polymerization method, the usual bulk polymerization method, suspension polymerization method, solution polymerization method, emulsion polymerization method, etc. can be used...

Embodiment

[0144] Hereinafter, although an Example etc. demonstrate this invention, this invention is not limited to these.

[0145]

[0146]

[0147] 213 parts by weight of n-propanol as a polymerization solvent was put into a reaction container equipped with a thermometer, a stirring device, a nitrogen gas introduction pipe, and a cooling pipe, and nitrogen gas was blown thereinto, followed by heating to 80°C. Then, dropwise added over 2 hours: 35 parts by weight of N,N-dimethylacrylamide as monomer (A-1), 30 parts by weight of methyl methacrylate as monomer (A-2) and 20 parts by weight of butyl acrylate, 10 parts by weight of 2-hydroxyethyl acrylate as monomer (A-3), 5 parts by weight of N-methylolacrylamide as monomer (A-4), 15 parts by weight of n-propanol A solution mixed in parts by weight; and tert-hexyl peroxypivalate (manufactured by NOF Corporation, product name "Perhexyl PV" (active ingredient 70% by weight)) equivalent to 1.0 parts by weight as a radical polymerization i...

Embodiment 2～27

[0196]

[0197] Except having changed the monomer of Example 1 into the raw material and its ratio described in Tables 1-3, the solution of the copolymer (A) of Examples 2-27 was prepared by operation similar to Example 1.

[0198]

[0199] The antifogging composition of Examples 2-27 was prepared by the same operation as Example 1 except having changed the raw material of Example 1 into the raw material and its ratio described in Tables 1-3. Furthermore, by the same operation as Example 1, the antifogging article (test piece) which has the antifogging coating film of Examples 2-27 was produced.

[0200] Tables 1-3 show the results obtained by the evaluation methods of (1-1) to (1-4) and (2) to (4) above using the test pieces obtained above.

[0201]

[0202]

[0203] 223 parts by weight of n-propanol as a polymerization solvent and N,N-dimethylacrylamide (DMAA) as a monomer (A-1) were added to a reaction vessel equipped with a stirring device, a nitrogen gas introduct...

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Abstract

The invention provides an antifogging agent composition which can form an antifogging coating film which has under conditions of low temperature and a short time, and an antifogging article with the antifogging coating film. The antifogging coating film has the performance for which a vehicles lighting fixture is asked (especially, excellent antifogging durability). The antifogging agent composition comprises a copolymer (A), an acid catalyst (B) and a surfactant (C), wherein the copolymer (A) is an acrylate copolymer obtained from a monomeric mixture (meta), and the monomeric mixture containsthe monomer (A-1) (A-4) of a specific amount; the acid catalyst (B) contains sulfuric acid and / or a sulfonic acid system compound; and the surfactant (C) contains an anionic system surfactant (C-1) and a cation system surfactant (C-2).

Description

technical field [0001] The present invention relates to an antifogging agent composition and an antifogging article having an antifogging coating film. Background technique [0002] In vehicle lamps such as headlights of automobiles, high-humidity air may enter the lamp chamber, and the lens may be cooled by external air or rainfall, and moisture may condense on the inner surface to form fog. As a result, the brightness of the lamp may decrease or the appearance of the lens surface may be impaired, which may cause discomfort to the user. In order to prevent such lens fogging, there is known a method of applying an antifogging agent to a portion where fogging occurs (inside the lens) to form an antifogging coating film (dried coating film or cured coating film) (Patent Documents 1 to 3) . [0003] Patent Document 1 discloses an antifogging agent composition containing a copolymer formed from a monomer mixture, a basic compound having a sulfonic acid group, and a surfactant....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/24C09D7/63C09D7/47
CPCC09D7/63C09D133/24C09D7/47C08L83/12C08K5/42C08K5/19
Inventor 鹤冈大加藤真纪
Owner NOF CORP
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