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Liquid-applied sound dampening

A sound-absorbing, liquid-state technology that solves inefficiencies and high costs in the field of compositions for automotive applications

Active Publication Date: 2011-02-02
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, manufacturers have to design, supply and store large numbers of these parts, which is costly and inefficient

Method used

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  • Liquid-applied sound dampening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Preparation of an aqueous dispersion of phosphorus-containing polymer particles

[0049] A monomer emulsion was prepared by mixing 576 g of deionized (DI) water, 21.1 g of dodecylbenzenesulfonate surfactant (23% by weight active), 38.6 g of ethoxylated monoalkylsulfosuccinic acid Ester surfactant (30% active by weight), 38.6g acrylic acid, 1255.3g butyl acrylate, 154.8g acrylonitrile, 425g styrene and 57.9g phosphoethyl methacrylate (50% active). At 87°C, add 664 g of deionized water, 12.6 g of dodecylbenzenesulfonate (23%), 1.44 g of sodium sulfate and 0.4 g of 4-hydroxy TEMPO (5% active), equipped with a stirrer and A 5-liter four-neck round bottom flask of the condenser was charged with 102.7 g of the monomer emulsion, followed by 5.9 g of sodium persulfate dissolved in 32.4 g of deionized water and washed into the flask with an additional 22.6 g of deionized water. After 10 minutes, the remaining monomer emulsion and a solution of 5.9 g sodium persulfate...

Embodiment 2A-B

[0050] Examples 2A-B: Coating Formulations and Composite Loss Factors

[0051] The components used in the table below are: Primal 308 AF (styrene-acrylate adhesive), commercially available from Rohm and Haas Company, Philadelphia, PA; Foamaster Nopco NXZ, available from Cognis; Tamol TM 850 Dispersant and UCD 1530E Black Colorant, available from Rohm and Haas Company; Snowwhite 12 (calcium carbonate), available from Omya, Inc.; Mica 325, available from Asheville Mica Company; and Acrysol TM TT-615, a thickener (hydrophobically modified alkaline swellable emulsion (HASE)), also available from Rohm and Haas Company. These materials were used to make the following coating formulations.

[0052]Composite loss factor ("CLF") calculations at various temperatures were performed according to ASTM E-756 test method, with further test specifications derived from SAE J-1637 test method for Oberst Bar testing. Will weigh 3.0kg / m 2 The dry paint was applied to samples 2A and 2B. Will ...

Embodiment 3

[0056] Preparation of Aqueous Dispersions of Phosphorus-Containing Polymer Particles

[0057] A monomer emulsion was prepared by mixing 969 g butyl acrylate, 34 g phosphoethyl methacrylate, 680 g methyl methacrylate, 17 g urea methacrylate, 477 g deionized (DI) water, and 18.7 g 60 wt. Ammonium alkylphenoxy polyethoxy sulfate (ammonium alkylphenoxy polyethoxy sulfate) surfactant aqueous solution, and emulsified with stirring. Next, 2.5 g of a 60% by weight aqueous solution of alkylphenoxypolyethoxyammonium sulfate surfactant and 1000 g of deionized water were added to a 5-liter multi-necked flask equipped with mechanical stirring. The contents of the flask were then heated to 85°C under a nitrogen atmosphere. To the contents of the stirred flask was added 92 g of the monomer emulsion, followed by 2.6 g of APS in 100 g of deionized water, followed by 1.7 g of sodium carbonate in 100 g of deionized water. The total addition time for the co-feed of the monomer emulsion and 2.6 ...

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Abstract

The present invention provides a liquid applied sound dampening composition with a binder having from 0.03% to 3% phosphorus present as copolymerized pendant phosphorus acid groups.

Description

technical field [0001] The present invention relates to compositions for sound dampening, especially for motor vehicle applications. Background technique [0002] In many cases, motor vehicle manufacturers have sought to create vehicles that suppress the sound from vibrations from road noise, engine and transmission vibrations, and wind. One of the most common methods of reducing vibration is asphalt patches, which are thick patches of asphalt that are adhered to metal or plastic parts of the vehicle body or frame. They are quite effective for sound dampening, but are inconvenient to use. First, they require a lot of labor to install. Second, because the body and frame components of each vehicle type differ from other vehicle types, manufacturers have to offer a rather wide variety of patches of different sizes and shapes. Even a single car can use a fair number of patches of different sizes and shapes. As a result, manufacturers have to design, supply and store large qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/00C09D7/12C09D5/00G10K11/162
CPCC08F230/02C08F220/18C09D143/02B60R13/08C08F220/14C08F275/00C08F220/1804C08K3/01C08K5/0008C08L23/32C08L43/02
Inventor A·R·赫梅斯A·J·斯沃茨D·E·威廉姆斯
Owner ROHM & HAAS CO
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