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Liquid-applied sound damping

A composition, adhesive technology, applied in the direction of coating, instrument, transportation and packaging, can solve the problem of odor, harm the environment and so on

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Liquid-applied sound deadening materials comprising solvent-based epoxy or polyurethane-based materials have significant disadvantages for the environment due to VOC emissions and cause odor problems (e.g. "new car smell")

Method used

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  • Liquid-applied sound damping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0069] Example 2 - Oligomer A, 100% MAA, Mn=2808

[0070] 1000 grams of deionized water was added to a 2-liter flask and heated to 60°C. When the water temperature reaches 60°C, add 26 mg of ([two [m-[(2,3-butane dione dioximato) (2-)-O:O9]] tetrafluorodiborate ( 2-)-N, N9, NO, N-] cobalt), CoBF was added to the flask, and then 1.9 grams of dihydrochloride 2,2'-azobis[2-(2-imidazolin-2-yl)propane was added ] in 20 g of deionized water. A mixture of 510 g of methyl methacrylate and 20 mg of CoBF and 1.9 g of 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride was added over a period of 60 minutes. The solution was added linearly to the flask in splits. After the feed addition was complete, the reaction mixture was held at 60°C for 120 minutes. The reaction mixture was then cooled, dried in a vacuum oven, and crushed to form a powder. Using acrylic acid standard sample, the number average molecular weight Mn measured by GPC is 2808.

Embodiment 3

[0071] Example 3 - Oligomer B, 100% MAA, Mn=634

[0072] Add 1000 grams of deionized water into a 2-liter flask and heat to 60°C. When the water temperature reached 60°C, 102 mg ([two [m-[(2,3-butane dione dioximato) (2-)-O:O9]] tetrafluorodiborate ( 2-)-N, N9, NO, N-] cobalt), CoBF was added to the flask, and then 1.9 grams of dihydrochloride 2,2'-azobis[2-(2-imidazolin-2-yl)propane was added ] in 20 g of deionized water. A mixture of 510 g of methyl methacrylate and 80 mg of CoBF and 1.9 g of 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride were added over a period of 60 minutes in A solution of 20 grams of deionized water was added linearly to the flask. After the feed addition was complete, the reaction mixture was held at 60°C for 120 minutes. The reaction mixture was then cooled, dried in a vacuum oven, and crushed to form a powder. Using acrylic acid standard sample, the number average molecular weight Mn measured by GPC is 634.

Embodiment 4

[0073] Example 4 - Oligomer C, 100% AA, Mn=482

[0074] Oligomer C is an oligomer of acrylic acid with unsaturated end groups prepared according to the procedure described in US Patent No. 5,710,227. The reaction mixture was a 30% aqueous solution of acrylic acid, based on the weight of acrylic acid, containing 3% tert-butyl hydroperoxide as an initiator. The residence time was 8 seconds and the reaction temperature was 375°C. The conversion rate was 92%. Using acrylic acid standard sample, the number average molecular weight Mn measured by GPC is 482.

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Abstract

The present invention relates to a sound damping material which is coated in liquid state, and particularly relates to a sound damping composition which is coated in liquid state, wherein the sound damping composition comprises a waterborne polymer adhesive, a filling agent and a thickening agent. The adhesive comprises 0.05-20wt146005230f carboxyl acid monomer which exists in the groups which is connected with poly-acid side chain sideways when the total weight of solid in the polymer is taken as a reference.

Description

[0001] This application is a continuation-in-part of co-pending U.S. Patent Application Serial No. 12 / 004301 filed December 20, 2007; U.S. Provisional Patent filed November 8, 2007 pursuant to 35 U.S.C. §119(e) Priority of application serial number 61 / 002341. technical field [0002] The present invention relates to compositions for sound dampening, particularly suitable for motor vehicle applications. Background technique [0003] In many cases, motor vehicle manufacturers need to take steps to manufacture vehicles that are attenuated from the sound caused by road noise, engine and transmission vibrations, and wind-induced vibrations. One of the most common methods of shock absorption is the use of asphalt sheets, which are thick sheets that are adhered to metal or plastic parts of the body or frame. These bitumen sheets are fairly effective at damping sound, but are inconvenient to use. First of all, installing these asphalt sheets is very heavy work. Second, because ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L33/04C09D151/00C09D133/04C09D5/00G10K11/162C09D7/43C09D7/61
CPCC08F8/12B60R13/08C08F2/26C09D133/06C09D151/003C09D133/02C08F290/046C08F290/06C08F2220/1825C09D7/1216C09D7/002C08F8/44C08F2800/20C08F120/06C09D135/00G10K11/162C08F220/14C08F2810/50C08F290/14C08F120/14C09D7/43C09D7/61C09D5/00C08F220/1804C08F220/06C08F220/283C08F220/04
Inventor M·M·约翰逊A·J·斯沃茨D·E·威廉姆斯
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