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Antifog laminate

一种层叠体、亲水层的技术，应用在涂层、分层产品、合成树脂层状产品等方向，能够解决难初始防雾性、视觉辨认性下降、防雾性下降等问题

Active Publication Date: 2019-04-16
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there are cases where it is difficult to semi-permanently maintain this initial anti-fog property
For example, when the anti-fogging property is lowered by wiping the surface with a cloth, etc., and moisture adheres due to condensation, etc., even if the attached moisture spreads further on the surface, an uneven water film is formed, resulting in, for example, When applied to glasses, etc., the visibility may be reduced
In addition, there are cases where a high scratch resistance equivalent to that of a hard coat applied to a transparent material is also required, and a strong surface (scratch resistance equivalent to a hard coat) and high anti-fog In the application of both permanent (initial and long-term) applications, there are still areas that need improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0457] For Example 1 and Comparative Example 10, the water contact angle after water washing was also measured.

[0458] The term "after washing with water" here refers to a sample in which the surface of the sample was washed with running water for 30 seconds, and then dried by air blowing.

[0459] In the present invention, the evaluation of the structure of the copolymers (i), (ii) and (iii) was performed as follows.

[0460]

[0461] use 13 C-NMR analysis has a unit (1) containing a sulfonic acid group, a unit (2) having an epoxy group, and a unit ratio (1) / unit (3) having a trialkoxysilyl group (2) / (3). The measurement conditions are described below.

[0462] (measurement conditions)

[0463] *Device: ECX-400P (JEOL)

[0464] *Measurement core: 13 C

[0465] *Measurement mode: single pulse proton broadband decoupling

[0466] * Pulse width: 45° (5.0 microseconds)

[0467] *Points: 64K

[0468] *Observation range: 31407Hz

[0469] * Number of scans: 20000 time...

Synthetic example 1

[0532] [Synthesis Example 1]

[0533] 936.9 g of methanol degassed under reduced pressure was charged into the reaction flask, and 38.3 g (0.580 mol) of KOH pellets with a purity of 85 wt % were gradually added thereto and completely dissolved while stirring. Next, 124.0 g (0.585 mol) of acrylamide-tert-butylsulfonic acid (hereinafter referred to as ATBS) was charged in portions, and neutralized (PH=7.6) to produce acrylamide-tert-butylsulfonic acid A neutralized mixture of acid potassium salt (hereinafter referred to as ATBS-K.).

[0534] Next, 10.3 g (0.0725 mol) of glycidyl methacrylate (hereinafter, abbreviated as GMA), methacryloxypropyltriethoxysilane (hereinafter, abbreviated as KBE-503.) 21.1 g (0.0725 mol) and 2.0 g of methanol, and a mixture of 0.63 g of tert-butyl peroxy-2-ethylhexanoate (hereinafter, abbreviated as perbutyl-O) as a polymerization initiator and 6.3 g of methanol . They were loaded in portions (one-third each time) through 2 hours respectively in...

Embodiment 2

[0561]

[0562] Add 30 g of 1-methoxy-2-propanol, 2-hydroxy-2- 2.1 g of methylpropiophenone (manufactured by Ciba Japan K.K., trade name: DAROCURE1173) was stirred and mixed to prepare coating composition B2.

[0563]

[0564] In the same manner as in Example 1, a sample obtained by coating and curing the above-mentioned urethane-based primer on blue plate glass was made, and the coating composition was coated with a spin coater at 500 rpm for 60 seconds. A laminate was formed in the same manner as in Example 1 except that B2 was applied on the surface of the primer layer to form a water-absorbing layer with a thickness of 12 μm.

[0565] The evaluation results are shown in Table 2.

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Abstract

The main purpose of the present invention is to impart a greater antifog property to a hydrophilic material that was previously presented by the present inventors and comprises a cross-linked resin wherein hydrophilic groups are segregated to a surface thereof. A laminate according to the present invention is provided with a water absorption layer (B) and a hydrophilic layer (A) in this order on asubstrate, wherein the hydrophilic layer (A) comprises a cross-linked resin having an anionic, cationic, or nonionic hydrophilic group, the gradient (hydrophilic group strength at a surface of the hydrophilic layer (A) / hydrophilic group strength at a point at 1 / 2 the thickness of the hydrophilic layer (A)) of the hydrophilic groups in the hydrophilic layer (A) is 1.1 or greater, and the water absorption layer (B) comprises a cross-linked resin with a water absorption rate in the range of 5-500wt% per unit mass (g).

Description

technical field [0001] The present invention relates to a laminate having hydrophilic properties and antifogging properties. Background technique [0002] In recent years, there has been an increasing demand for improvement in fogging and fouling of substrates made of organic materials such as plastics and inorganic materials such as glass. [0003] As a method of solving the fogging problem, a method of improving hydrophilicity and water absorption using an antifogging paint containing a reactive surfactant and an acrylic oligomer has been proposed (for example, see Non-Patent Document 1). In addition, as a means to solve the problem of dirt, it has been proposed to improve the hydrophilicity of the surface of the material, thereby utilizing sprinkling or rainfall to float and remove dirt such as hydrophobic substances from external air attached to the outer wall or the like (for example, See Non-Patent Documents 2 and 3.). [0004] In addition, a hydrophilic material obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B05D5/00C09D133/00
CPCB05D5/00B32B27/30C09D133/00C03C17/3405C03C17/42C03C17/002C03C2217/73C03C2217/75C03C2217/91B05D5/06B32B7/02B32B27/18B32B27/308C09D133/08B32B2307/728B32B2551/00B32B2307/7265C08L33/066C08L33/14
Inventor 塙贵行冈崎光树
Owner MITSUI CHEM INC
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