Flame retardant, pressure-sensitive adhesive, and curable composition

Patent metadata

Field	Value
Publication number	US-9926473-B2
Application number	US-201515128540-A
Country	US
Kind code	B2
Filing date	Mar 20, 2015
Priority date	Mar 25, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Flame retardant tackifiers are represented by the formula ′ wherein R represents a hydrocarbyl group having 20 carbons and three consecutive fused six-membered rings; and each R 2 independently represents an alkyl group having from 1 to 8 carbon atoms. Curable compositions contain a curable binder precursor and at least one of the flame resistant tackifiers. Pressure-sensitive adhesives comprises an elastomer and at least one flame retardant tackifier compound represented by the formula ″ wherein R represents a hydrocarbyl group having 20 carbon atoms and three consecutive fused six-membered rings and each R 1 independently represents an alkyl or aryl group having from 1 to 8 carbon atoms.

First claim

What is claimed is:

1. A pressure-sensitive adhesive composition comprising:
an elastomer; and
at least one flame retardant tackifier compound represented by the formula

wherein
R represents a hydrocarbyl group having 20 carbon atoms and three consecutive fused six-membered rings; and
each R 1 independently represents an alkyl or aryl group having from 1 to 8 carbon atoms.

2. The pressure-sensitive adhesive composition of claim 1 , wherein the at least one flame retardant tackifier compound comprises at least one compound represented by the formula

3. The pressure-sensitive adhesive composition of claim 1 , wherein the elastomer has a glass transition temperature of less than or equal to zero degrees Celsius.

4. The pressure-sensitive adhesive composition of claim 1 , wherein said at least one elastomer is selected from the group consisting of natural rubber elastomers, acrylic elastomers, styrene-diene block copolymer elastomers, polybutadiene elastomers, α-olefin elastomers, polyisobutylene elastomers, and combinations thereof.

5. The pressure-sensitive adhesive composition of claim 1 , wherein each R 1 is independently selected from the group consisting of phenyl groups and alkyl groups having from 1 to 6 carbon atoms.

6. The pressure-sensitive adhesive composition of claim 1 , wherein each R 1 independently represents an alkyl group having from 1 to 4 carbon atoms.

7. The pressure-sensitive adhesive composition of claim 1 , wherein each R 1 independently represents methyl, ethyl, or propyl.

8. The pressure-sensitive adhesive composition of claim 1 , wherein the total combined amount of:
the at least one flame retardant tackifier;
any additional tackifier, if present; and
any additional flame retardant, if present,

is less than or equal to 25 percent by weight, based on the total weight of the pressure-sensitive adhesive composition.

9. The pressure-sensitive adhesive composition of claim 1 , wherein the pressure-sensitive adhesive composition is substantially free of additional tackifier.

10. The pressure-sensitive adhesive composition claim 1 , wherein the pressure-sensitive adhesive composition is substantially free of additional flame retardant.

11. A curable composition comprising:
a curable binder precursor; and
a flame retardant tackifier represented by the formula

wherein
R represents a hydrocarbyl group having 20 carbon atoms and three consecutive fused six-membered rings; and
each R 2 independently represents an alkyl group having from 1 to 8 carbon atoms.

12. The curable composition of claim 11 , wherein the at least one flame retardant tackifier comprises at least one compound represented by the formula

13. The curable composition of claim 11 , wherein the curable binder precursor is selected from the group consisting of curable epoxy resins and curable acrylic resins.

14. The curable composition of claim 11 , wherein each R 2 independently represents an alkyl group having from 1 to 6 carbon atoms.

15. The curable composition of claim 11 , wherein each R 2 independently represents an alkyl group having from 1 to 4 carbon atoms.

16. The curable composition of claim 11 , wherein each R 2 independently represents methyl, ethyl, or propyl.

Assignees

• 3M Innovative Properties Co

Inventors

• Ross Richard B
• Boardman Larry D
• Pyun Eumi
• Plepys Anthony R

Classifications

• C09J133/04

  Homopolymers or copolymers of esters {(C09J143/04 takes precedence)} · CPC title

• C09J11/06 Primary

  organic · CPC title

• C08K5/521 Primary

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C09J109/00

  Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title