Article of manufacture containing a flame retardant filler prepared from a bridged polysilsesquioxane

Patent metadata

Field	Value
Publication number	US-9540499-B2
Application number	US-201615006640-A
Country	US
Kind code	B2
Filing date	Jan 26, 2016
Priority date	Aug 13, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A bridged polysilsesquioxane-based flame retardant filler imparts flame retardancy to manufactured articles such as connectors and other articles of manufacture that employ thermosetting plastics or thermoplastics. In an exemplary synthetic method, a bridged polysilsesquioxane-based flame retardant filler is prepared by sol-gel polymerization of a monomer having two or more trialkoxysilyl groups attached to an organic bridging group that contains a fire retardant group (e.g., a halogen atom, a phosphinate, a phosphonate, a phosphate ester, and combinations thereof). Bridged polysilsesquioxane particles formed by sol-gel polymerization of (((2,5-dibromo-1,4-phenylene)bis(oxy))bis(ethane-2,1-diyl))bis(trimethoxysilane), for example, and follow-on sol-gel processing may serve both as a filler for rheology control (viscosity, flow, etc.) and a flame retardant.

First claim

What is claimed is:

1. An article of manufacture, comprising:
a housing comprising a plastic material, wherein the plastic material includes a flame retardant filler comprising a bridged polysilsesquioxane prepared by sol-gel polymerization of a monomer comprising two or more trialkoxysilyl groups attached to an organic bridging group, wherein the bridging group contains a fire retardant group selected from a halogen atom, a phosphinate, a phosphonate, a phosphate ester, and combinations thereof.

2. The article of manufacture as recited in claim 1 , wherein the article of manufacture is a connector.

3. The article of manufacture as recited in claim 1 , wherein the bridging group contains at least two bromine atoms as the fire retardant group and the monomer is represented by the following formula:

4. The article of manufacture as recited in claim 1 , wherein the bridging group contains at least four bromine atoms as the fire retardant group and the monomer is represented by the following formula:

5. The article of manufacture as recited in claim 1 , wherein the bridging group contains a phosphinate as the flame retardant group and the monomer is represented by the following formula:

wherein R 1 , R 2 and R 3 are organic substituents.

6. An article of manufacture, comprising:
a housing comprising a plastic material, wherein the plastic material includes a flame retardant filler comprising a bridged polysilsesquioxane prepared by sol-gel polymerization of a monomer comprising two or more trialkoxysilyl groups attached to an organic bridging group, wherein the organic bridging group has a backbone portion that includes at least two oxygen atoms, and wherein the organic bridging group is halogenated.

7. The article of manufacture as recited in claim 6 , wherein the article of manufacture is a connector.

8. The article of manufacture as recited in claim 6 , wherein the bridged polysilsesquioxane is incorporated into the plastic material in the form of bridged polysilsesquioxane particles.

9. The article of manufacture as recited in claim 8 , wherein the bridged polysilsesquioxane particles serve both as a filler for rheology control and a flame retardant.

10. An article of manufacture, comprising:
a housing comprising a plastic material, wherein the plastic material includes a flame retardant filler comprising a bridged polysilsesquioxane prepared by sol-gel polymerization of a monomer comprising two or more trialkoxysilyl groups attached to an organic bridging group, wherein the organic bridging group contains a fire retardant group selected from a phosphinate, a phosphonate, a phosphate ester, and combinations thereof, and wherein the organic bridging group has a backbone portion that includes at least one phosphorous atom.

11. The article of manufacture as recited in claim 10 , wherein the article of manufacture is a connector.

12. The article of manufacture as recited in claim 10 , wherein the bridged polysilsesquioxane is incorporated into the plastic material in the form of bridged polysilsesquioxane particles.

13. The article of manufacture as recited in claim 12 , wherein the bridged polysilsesquioxane particles serve both as a filler for rheology control and a flame retardant.

Assignees

• IBM

Inventors

• Boday Dylan J
• Kuczynski Joseph
• Meyer Iii Robert E

Classifications

• C08G77/045

  containing less than 25 silicon atoms · CPC title

• H05K2201/012

  Flame-retardant; Preventing of inflammation · CPC title

• C08K5/5403 Primary

  containing no other elements than carbon or hydrogen · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• H05K3/4626

  characterised by the insulating layers or materials (H05K3/4688 takes precedence) · CPC title