Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fire resistace acoustic foam

A foam, polymer technology, applied in the field of fire-resistant acoustic foam, which can solve undescribed problems

Inactive Publication Date: 2006-03-29
DOW GLOBAL TECH LLC
View PDF52 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not describe macrocellular foams or flame retardant macrocellular foams for acoustic applications or their preparation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fire resistace acoustic foam
  • Fire resistace acoustic foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] The following examples illustrate the effect of additive (antimony trioxide, builder) particle size on the obtained foam cell size. The examples also detail the flame retardant formulations used to make the PP / PE blend acoustic foams of the present invention and the method of making such foams by extrusion. The foams listed in Table 1 were prepared in standard extrusion equipment. The levels of additives used in the formulation (whether they were added as powders or as concentrates) are reported in phr. Blowing agent levels used in the formulation are reported in parts by weight per hundred parts by weight total feed (polymer and additives) (pph).

[0161] Comparative Formulation 1 in Table 1 was run using a 60% / 40% blend (by weight) of HMS PP1 and LDPE1 with the following additives: 0.5phr Irganox 1010, 0.2phr Ultranox 815A, 0.5phr Atmer 129 GMS, 0.4phr 50 BK 70 carbon black, 5phr PE-68 brominated flame retardant and 0.5phr antimony trioxide synergist. The isobutane...

Embodiment 2

[0170] The following examples illustrate the effect of additive (antimony trioxide, builder) particle size on the obtained foam cell size. This example also details the flame retardant formulations used to make the PE acoustic foams of the present invention and the method of making such foams by extrusion. The foams listed in Table 2 were prepared in standard extrusion equipment.

Embodiment 2B

[0174] Example 2B formulation.

[0175] The results obtained using the above examples are summarized in Table 2 below.

[0176] Example *

base resin

flame retardant

Flame Retardant Synergist

average pore size

Control 2a *

LDPE2

PE-68

0phr

n / a

0phr

>10mm

Comparative example 2 *

LDPE2

PE-68

11phr

TRUTINT

50

1.3

phr

7.7mm

Control 2b **

LDPE2

PE-68

0phr

n / a

0phr

>10mm

Example

2A **

LDPE2

PE-68

11phr

MICROFIN

AO-3

2phr

9.1mm

Example

2B **

LDPE2

PE-68

6phr

MICROFINE

AO-3

3phr

7.7mm

[0177] * Other ingredients in each example formulation:

[0178] Irganox-1010: 0.3phr, Atmer 1013GMS: 1.0phr, Plasblak PE-3037 carbon black: 0.375phr, isobutane as blowing agent: 8.3pph

[0179] ** Other ingredients in each example...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A macrocellular foam is described having improved cell size and fire-test-response characteristics, among other features, which is obtained by selecting a particle size less than 1 micron for the flame retardant adjuvant. The inventors found that the amount of fire retardant adjuvant can be increased for a given foam cell size or the foam cell size can be increased for a given amount of fire retardant adjuvant, allowing the production of foams having exceptionally large, well-formed, cells that have excellent fire-test-response characteristics. The benefits are especially noteworthy in relation to thermoplastic foams and inorganic flame retardation adjuvants, due to the unexpected reduction in the nucleation effect of the adjuvant. The foams are useful for improving the acoustic performance of products that are required to meet certain fire-test-response characteristics. It may be used in automotive and other transportation devices, building and construction, household and garden appliances, power tool and appliance and electrical supply housing, connectors, and aircraft as acoustic systems for sound absorption and insulation.

Description

technical field [0001] This invention relates to fire resistant acoustic foam. Background technique [0002] Foam and foamed articles often find use in acoustic systems for sound absorption and sound insulation. Such foams, when developed for use in different market segments (appliances, automotive, building and construction, etc.), generally need to meet certain acoustic performance requirements and applicable flame test response characteristics (ASTME176-99). Various flame retardant components are often added to such foam resin formulations in order to achieve the desired fire resistance rating. Unfortunately, typical flame retardant components and other additives added to polymer resin formulations cause a number of problems during foam manufacture that have an adverse effect on obtaining acoustically active macrocellular foams. Due to their effect on polymer gel viscosity and melt strength, flame retardants generally cause poor cell structure and cell collapse. To red...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/00C08J9/04C08K3/22C08L23/10
CPCC08J9/0023C08J9/0019C08J9/00
Inventor S·比尔甘J·卡默勒C·P·朴W·G·斯托比S·苏布拉芒尼安
Owner DOW GLOBAL TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com