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Thickening agent used for aqueous vibration absorbing material

A technology of shock-absorbing materials and thickeners, applied in the direction of shock absorbers, springs/shock absorbers, shock absorbers, etc., can solve problems such as cracking of coating films, reduction of importance, and inability to precisely form coating materials

Inactive Publication Date: 2004-05-19
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, evaporation of water inside the coating film creates a problem that even the part of the coating film that has hardened in the vicinity of the first surface expands outward and causes the coating film to crack
When the coated film swells or cracks, its quality as a shock-absorbing material is greatly reduced
This disadvantage makes it impossible to precisely form the coating material used as a shock absorbing material, thereby reducing its importance
These problems are especially prominent when the coating film is formed by using latex coating materials

Method used

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  • Thickening agent used for aqueous vibration absorbing material
  • Thickening agent used for aqueous vibration absorbing material
  • Thickening agent used for aqueous vibration absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] [Example 1: Synthesis of a polymer having a basic-soluble monomer unit and an associative monomer unit]

[0072] In a four-necked separable flask with stirrer, thermometer, refrigerator, nitrogen inlet tube, and dropping funnel, were charged deionized water (115 parts) and ammonium sulfonate of polyoxyethylene lauryl ether ( 1.5 servings). At an internal temperature of 68°C, the contents of the flask were stirred and gently purged with nitrogen until the interior of the reactor was sufficiently replaced with nitrogen. Ammonium sulfonate of polyoxyethylene lauryl ether (1.5 parts) was dissolved in deionized water (92 parts).

[0073] A mixture product (50 moles of ethylene oxide) of methacrylic acid (40 parts), ester and octadecyl polyoxyethylene (3-methyl-3-butenyl) ether as polymer monomer Adduct) (10 parts) and ethyl acrylate (50 parts) were added to the product solution, which were stirred together to prepare a pre-emulsion. By the way, said methacrylic acid is th...

Embodiment 2

[0076] [Example 2: Synthesis of a polymer having a basic-soluble monomer unit and an associative monomer unit]

[0077] The thickener that is used for damping material 2 is prepared according to the program of embodiment 1, uses the mixture product of methacrylic acid (40 parts), ester and octadecyl polyoxyethylene acrylate (50 moles of ethylene oxide Alkane adduct) (10 parts) and ethyl acrylate (50 parts) as polymer monomers to replace methacrylic acid (40 parts), ester and octadecylpolyoxyethylene (3-methyl - a mixture product of 3-butenyl) ether (adduct of 50 moles of ethylene oxide) (10 parts) and ethyl acrylate (50 parts).

Embodiment 3 and 4 and comparative Embodiment 2

[0080] [Examples 3 and 4 and Comparative Example 2: Preparation of Latex Coating Material for Shock Absorbing Material]

[0081] The latex coating material for shock-absorbing material, which is a composition for shock-absorbing material, is prepared by mixing the thickener for shock-absorbing material prepared in Examples 1 and 2 and Comparative Example 1 with other components were prepared in fractions, and the mixing ratios are shown below.

[0082] (The mixing ratio)

[0083] - Emulsion ("Acryset DC-172", manufactured by Nippon Shokubai Co. Ltd.) 148 parts

[0084] - Calcium carbonate ("NN#200", manufactured by Nitto Funka Kogyo K.K.) 240 parts

[0085] - Additive (propylene glycol) 19 parts

[0086] - Dispersant ("Demol EP", manufactured by Kao Co., Ltd.) 4.3 parts

[0087] -Thickener for shock-absorbing material 7 parts

[0088] - Defoamer (Nopuko 8034L", manufactured by San Nopuko K.K.) 0.3 parts

[0089] In Comparative Example 2, 14 parts of the thickener for the...

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Abstract

The object of the invention is to provide a means to enhance the drying property of a coating film formed as a vibration damper and repressing the occurrence of crack and expansion in the surface of the coating film. The task mentioned above is accomplished by using a thickener for vibration damper, which contains a polymer comprising an alkali-soluble monomer unit and an associating monomer unit. The alkali-soluble monomer unit may possess a carboxyl group, a sulfonic acid group, or a phosphoric acid group, or a salt thereof. The associating monomer unit may possess in a side chain thereof a group represented by the formula, - (R1-O) n-X-R2, (wherein R1 denotes methylene group, ethylene group, propylene group or butylene group, n denotes a number in the range of - 300, X denotes a direct bond, -C(=O)-, or -C(=O)NH-, and R2 denotes a hydrocarbon group of 6 - 30 carbon atoms).

Description

technical field [0001] The present invention relates to a thickener contained in a coating material for forming a shock-absorbing material, and more particularly to a thickener capable of improving the drying performance of a coating film and suppressing the occurrence of surface cracking and swelling of the coating film. Background technique [0002] Coating materials should be of various qualities to suit purposes such as protection, insulation and aesthetics. Shock-absorbing materials are one of the uses of coating materials. The term "shock-absorbing material" refers to a material that is placed on the surface of the material in order to block transmission of sound and prevent vibration. For example, shock absorbing material is preferably disposed on the surface of an automobile chassis in order to keep the interior of the automobile quiet. [0003] Sound insulating sheeting is an example of a material that can be used as a shock absorbing material. However, the handl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C08F290/06C08F299/02C09D7/00F16F1/02F16F9/32F16F9/38
CPCC08F299/02F16F1/024F16F9/38C09D7/002C08F290/062F16F9/3271C09D7/43
Inventor 森广重保宫胁幸弘三轮贵宏
Owner NIPPON SHOKUBAI CO LTD
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