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Release-resistant hygroscopic agent for automobile headlights and hygroscopic articles containing same

A technology of hygroscopic products and hygroscopic agents, which is applied in the direction of motor vehicles, vehicle parts, road vehicles, etc. It can solve the problems of dew condensation on the inner surface of the lamp lens, the reduction of functional quality and consumer quality, and whitening, etc., and achieve moisture absorption rate Excellent, excellent release resistance effect

Active Publication Date: 2022-02-25
株式会社帝湿勘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-fog coating agent deteriorates due to outdoor ultraviolet rays, temperature, humidity, etc., such as whitening or sag phenomenon, and in this case, the problem of replacing the car lamp unit occurs
In addition, general bentonite-based hygroscopic agents have the following problem: when the lamp is turned on after absorbing a certain amount of moisture, the moisture is released again in a high-temperature and low-humidity environment, causing dew condensation to occur on the inner surface of the lamp lens.
[0005] Due to the above-mentioned problems caused by the conventional use of anti-fog coating agents and bentonite-based moisture absorbents, replacement costs for automotive lamp components have occurred, and functional quality and consumer quality have decreased

Method used

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  • Release-resistant hygroscopic agent for automobile headlights and hygroscopic articles containing same
  • Release-resistant hygroscopic agent for automobile headlights and hygroscopic articles containing same
  • Release-resistant hygroscopic agent for automobile headlights and hygroscopic articles containing same

Examples

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experiment example

[0062] Hereinafter, the present invention will be described in more detail based on examples and comparative examples. However, the following examples and comparative examples are merely illustrations for explaining the present invention in more detail, and the present invention is not limited to the following examples and comparative examples.

[0063] The data and measurement methods of the physical properties of the release-resistant hygroscopic agent of the present invention are as follows.

[0064] The data of the hygroscopic materials used in the following Examples and Comparative Examples are shown in Table 1 below.

[0065] [Table 1]

[0066]

[0067] (stability)

[0068] After exposing the test piece in a thermo-hygrostat at a temperature of 50° C. and a relative humidity of 95% for 7 days, the state of phase separation of the contents of the test piece was visually evaluated.

[0069] ○: Very good (the content did not undergo phase separation after moisture abs...

Embodiment 1 to 18

[0079]After uniformly mixing with a mixer at the weight % in the following Table 2 to form a mixed composition, the mixed composition was put into a twin-screw extruder heated to an average temperature of 120° C., heated to melt and pelletized, thereby producing 25 g of the granular moisture absorbents of Examples 1, 3, 5, 7, 9, 11, 13, 15 and 17.

[0080] After using a mixer to uniformly mix the weight % of the following Table 2 to form a mixed composition, the mixed composition was pulverized by a pulverizer to produce Examples 2, 4, 6, 8, 10, 12, 14, 16 and 18 25g of powder type hygroscopic agent.

[0081] Next, the hygroscopic agents of Examples 1 to 18 were injected into an air-permeable packaging material with a length of 100 mm and a width of 100 mm, and then processed at a temperature of 120° C. with a heat sealer to manufacture test pieces.

[0082] For the test pieces of Examples 1 to 18, after thermally laminating a linear low-density polyethylene film (Daewon Indu...

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PUM

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Abstract

The present invention provides an environmentally friendly, release-resistant hygroscopic agent excellent in hygroscopicity and release resistance, and a hygroscopic product comprising the release-resistant hygroscopic agent. The release-resistant hygroscopic agent of the present invention is not only excellent in moisture absorption, but also excellent in release resistance under high-temperature and low-humidity environmental conditions, which are the environment in which automobile lamps are used, and thus can be usefully used in automobile lamps.

Description

technical field [0001] The present invention relates to a release resistant hygroscopic agent and absorbent articles comprising the same. More specifically, it relates to a release-resistant hygroscopic agent for automobile lamps which is environmentally friendly and excellent in hygroscopicity and release resistance, and a hygroscopic article containing the release-resistant hygroscopic agent. Background technique [0002] Generally, with the development of the automobile industry, dew condensation on headlights, taillights, fog lights, etc. continues to occur during transportation and storage of automobiles, resulting in increased industrial losses. [0003] In an environment with high humidity such as rainy days, when the temperature difference between the inside and outside of the parts is large, if the temperature of the lamp lens becomes low, the moisture inside the lamp will condense and condense finely on the inner surface of the lens. drops of water, foggy. The re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/04B01J20/30B01D53/28F21V31/00F21W107/10
CPCB01D53/28B01J20/043B01J20/046B01D2257/80B01J20/262B01J2220/46B01J20/28004B01D2253/1122B01D2253/1124B01J20/041B01J20/2805B01J20/223B01J20/261F21S45/50C08J5/18C08K5/098C08L23/06C08L23/12C08L67/03C08L91/06
Inventor 邢信锺成敏在金锺夹
Owner 株式会社帝湿勘