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Solid expandable compositions

A composition, solid-state technology, applied in the field of composition for sealing cavities, which can solve the problems of damage effectiveness, etc., and achieve the effect of improved corrosion resistance, good foam quality uniformity, and resistance to overbaking

Active Publication Date: 2009-09-16
HENKEL KGAA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion of the metal surface can cause the expandable material to separate from the interior walls of the vehicle cavity in which the expandable material is deployed, thereby compromising the effectiveness of the cavity filler insert to suppress noise and vibration within the cavity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] A series of solid expandable compositions according to the invention were prepared using the components shown in Table 1 . Each example composition also contains 4.1 wt% talc, 0.5 wt% zinc xylene sulfinate, 2.0 wt% TMPTMA, 1.3 wt% 1,3-bis-(tert-butylperoxy-iso Propyl) benzene (with CaCO 3 Together to form a powder; PERKADOX 14-40B-pd), 6.3 wt% of powdered polyethylene (ICORENE MP650-35, ICO Polymers, Inc.) and 0.1 wt% of antioxidant.

[0085] Table 1.

[0086] components Example 1 Example 2 Example 3 Ethylene / Vinyl Acetate / Malay

Anhydride terpolymer 1 50.0

24.6

49.5

Ethylene / Ethyl Acrylate / Malay

Anhydride terpolymer 2 20.0

44.2

-

Ethylene / Methyl Acrylate / Methyl

Glycidyl Acrylate III

meta-copolymer 3 -

-

19.8

Amine curing agent 4 0.6 1.2 0.6 Ketimine 5 0.2 - - Low-density polyethylene 6 5.0 - - Phenolic Resin 7 - 0.3 0.3 OBSH 8 3.4 6.0 ...

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Abstract

Solid expandable compositions useful for the manufacture of cavity filler inserts and the like are obtained by combining at least one anhydride- functionalized thermoplastic, at least one amine-functionalized latent curing agent, and at least one latent blowing agent. Such compositions may be formulated so as to provide a highly expanded foam upon heating to activate the blowing agent, wherein the foam is resistant to sagging and tolerant of overbaking conditions.

Description

technical field [0001] The present invention relates to compositions for sealing cavities, such as those found in body components. The composition is solid at room temperature but is capable of volume expansion by exposing the composition to heat sufficient to activate a latent blowing agent contained in the composition. Background technique [0002] In recent years, foamable resins have been developed for the purpose of filling or sealing hollow components of vehicles and the like, thereby dampening such vehicles and preventing vibrations. For example, these foamable resins are used to manufacture parts of a predetermined shape (sometimes referred to by those of ordinary skill in the art as baffles or cavity filler inserts) and placed in hollow pillars of automobiles, after which the foamable resin will Swell to fill or seal the column. [0003] Swellable resin formulations that have been developed for these applications are commonly referred to as column packings. Many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/27
CPCC08J2201/024C08J2351/04C08J2461/00C08J2300/104C08J9/06C08J9/0061C08J9/10
Inventor 土桥正明
Owner HENKEL KGAA
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