Emulsions of dilatant organopolysiloxanes

A polysiloxane, organo-based technology in the field of emulsions of dilatant organopolysiloxanes

Inactive Publication Date: 2011-04-27
DOW CORNING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although U.S. 4,863,985 teaches silicone emulsions that provide elastomeric silicones, the addition of tin and fillers is required in these compositions

Method used

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  • Emulsions of dilatant organopolysiloxanes
  • Emulsions of dilatant organopolysiloxanes
  • Emulsions of dilatant organopolysiloxanes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] First, 50 g of Me with a viscosity of about 50000 mPa·s (cP) and a number average 2 SiOH-terminated dimethylpolysiloxane was weighed into a max 100 cup followed by the addition of 0.10 g of 50 wt % trimethylsiloxy-terminated polydimethylsiloxane fluid having a kinematic viscosity of about 1000 cSt. boric acid dispersion. Close the cup and place it in the Speedmixer DAC 150 mixer, and at maximum speed, spin the cup for 20 seconds. The cup was allowed to remain undisturbed for 15 minutes, after which time the cup was spun again at maximum speed for 20 seconds. After standing for an additional 10 minutes, the cup was swirled again for 20 seconds. Immediately after the preceding rotation, 0.75 g of lauryl alcohol (4) ethoxylate (Brij 30), followed by the addition of 1.5 g of 72% lauryl alcohol (23) ethoxylate (Brij 35 L) of aqueous solution and 0.60 g of deionized (DI) water. Close the cup and place in the Speedmixer Spin inside for 20 seconds. The contents of t...

Embodiment 2

[0081] Using the same procedure as described in Example 1, 0.75 g of lauryl alcohol (4) ethoxylate (Brij 30), 1.5g 72% lauryl alcohol (23) ethoxylate (Brij 35 L) of aqueous solution and 0.60 g of deionized (DI) water, emulsified by 50 g of Me 2 SiOH-terminated polydimethylpolysiloxane, 0.11 g of a composition prepared from a 50 wt% boric acid dispersion in a trimethylsiloxy-terminated polydimethylsiloxane fluid having a kinematic viscosity of about 1000 cSt. Using the same procedure as Example 1, the emulsion viscous phase was incrementally diluted with a total of 31 g DI water. The average particle size of the emulsion is about 0.75 μm.

Embodiment 3

[0083] Using the same procedure and amounts as described in Example 2, except that the amount of boron oxide dispersion in polydimethylsiloxane was used, an emulsion was prepared. Use 50gMe 2 This emulsion was prepared from SiOH terminated polydimethylpolysiloxane and 0.40 g boron oxide / polydimethylsiloxane dispersion. The average particle size of the emulsion is about 0.75 μm.

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Abstract

Emulsions are disclosed of dilatant boron crosslinked organopolysiloxanes, coatings prepared from the emulsions, and various substrates impregnated with these coatings. The emulsions may be coated or impregnated onto fabrics to provide an energy absorbing material in Active Protection Systems.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application No. 61 / 044597, filed April 14, 2008, U.S. Provisional Application No. 61 / 044594, filed April 14, 2008, and U.S. Provisional Application 61 / 04, filed December 23, 2008 140109 rights and interests. technical field [0003] The present disclosure relates to emulsions of dilatant boron crosslinked organopolysiloxanes, coatings prepared from the emulsions, and various substrates impregnated with these coatings. The emulsion can be coated or impregnated on fabrics to provide energy absorbing material in Active Protection Systems. Background technique [0004] Boron crosslinked organopolysiloxanes were found to be useful as energy absorbing materials due to their dilatant properties. For example, dilatant boron crosslinked silicones are used in Active Protection Systems (APS) where fabrics are coated with boron crosslinked silicones. [0005] GB-A-890007, US-A-2431898 an...

Claims

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Application Information

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IPC IPC(8): C09D183/06C09D183/14C08J3/03
CPCC08J2383/06C09D183/14C09D183/06C08J2383/14C08J3/05Y10T428/249921C08L83/00
Inventor S·科万D·莱尔斯S·罗伯森A·斯塔莫
Owner DOW CORNING CORP
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