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Preformed compositions in shaped form

A composition, pre-formed technology that can be used in other chemical processes, chemical instruments and methods to solve problems such as time-consuming and labor-intensive

Active Publication Date: 2006-05-10
PRC DE SOTO INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

this process is time consuming and adds a significant amount of labor to active aircraft with many access doors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In Example 1, the following materials were mixed in proportions according to Table 1 to form the base composition: Thioplast® polysulfide polymer from Akzo-Nobel, 2-mercaptoethanol from BASF, Terminol® partially hydrogenated terphenylene from Solutia. Plasticizers, phenolic resins from PRC - DeSoto International, Inc., Cab-O-Sil® fumed silica from Cabot Corporation, titanium dioxide, Socal® or Winnofil® precipitated calcium carbonate from Solvay, mica from ACME - Hardesty Company, Atofina's Orgasol(R) polyamide powder, and Akzo-Nobel's Expancel(R) microspheres.

[0039] wt%

polysulfide polymer

36.56

2-Mercaptoethanol

0.10

partially hydrogenated terphenyl

6.28

Phenolic Resin

1.05

fumed silica

1.83

Titanium dioxide

3.04

calcium carbonate

20.99

Mica

15.06

Polyamide powder

14.92

Microspheres

0.17

[0040] Separately, the follo...

Embodiment 2

[0046] In another example, the polythioether polymer, Permapol P-3.1e obtained from PRC-DeSoto International, Inc., Glendale, California, bisphenol-A epoxy resin, and triethylenediamine according to Table III Proportions are blended to form thiol-terminated polymer adducts.

[0047] wt%

[0048] The compounds in Table III were blended and heated to 71°C (160°F) and mixed at 71°C for one hour. The mixture is then heated without mixing at 60°C (140°F) for 14 to 24 hours to form the thiol terminated polymer adduct. Mercaptan-terminated polymer adduct, triethylenediamine, partially hydrogenated terphenyl, titanium dioxide, calcium carbonate, mica, polyamide powder, and microspheres were mixed in the proportions in Table IV to form the base composition.

[0049] wt%

[0050] Liquid epoxy resin obtained from Shell Chemical, partially hydrogenated terphenyl, carbon black obtained from Cabot Corporation, fumed silica, calcium carbonate, mica, polyamide powder,...

Embodiment 3

[0054] In Example 3, four additional base compositions using varying amounts of the components of Example 1 were prepared according to Table VI.

[0055] wt%

[0056] The base composition of Table VI was mixed with the curing agent composition of Example 1. As in Example 1, 100 parts by weight of the base composition was mixed with 10 parts by weight of the curing agent composition to prepare a preformed composition. The preformed composition was extruded in tape form, frozen, equilibrated to use temperature and applied to the inspection window as described in Example 1. After 3 to 4 hours at a temperature of 4°C-32°C (40°F-90°F), a tight seal is obtained, which is resistant to water and aviation fuel.

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Abstract

Preformed compositions comprising sulfur-containing polymers in shaped form and the use of preformed compositions in shaped form to seal apertures. In certain embodiments, the preformed compositions comprise a sulfur-containing polymer and a blend of fillers wherein the blend comprises substantially equal amounts of mica and polyamide.

Description

[0001] This application claims priority from US Patent Application No. 10 / 355,813 (filed January 30, 2003), the entire contents of which are hereby incorporated by reference. [0002] Description of the invention field of invention [0003] The present invention relates to a preformed composition in shaped form and to the use of the preformed composition for sealing porosity. Background of the invention [0004] Polysulfide polymers are known in the prior art. The production of polysulfide polymers has been described by Fettes and Jorczak, Industrial and Engineering Chemistry, November 1950, at pages 2,217-2,223. The industrial use of polysulfide polymers in the manufacture of sealants for aerospace applications has long been known and used commercially. Polysulfide sealants have been used to seal aircraft exterior fuselages due to their high tensile strength, high tear strength, heat resistance and high resistance to ultraviolet light. Polysulfide sealants have been used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/00C08J5/00C08L63/00C08L81/02C08L81/04C09K3/10
CPCC08J5/00C08J2381/02C08L63/00C08L81/02C08L81/04C09K3/1012C08L2666/22C08L2666/16C08L61/06C08L2666/72
Inventor M·A·科斯曼
Owner PRC DE SOTO INT INC