Electrets and compounds useful in electrets
Assignee3M Innovative Properties Company
InventorsCharles Leir, Rahul Shah, Karl Benson
Life of this patent
Estimating the term…
Abstract
An electret filter media that includes a thermoplastic resin and a compound of the formula Y2-A(R1)n—Y1, where A is benzene, naphthalene or anthracene, Y1 and Y2 are each independently R2-R3, R2 is an ester linking group or an amide linking group, R3 is an alkyl group having from 10 to 22 carbon atoms, R1 is R2-R3 where R2 and R3 are each independently as defined above, and when A is benzene, n is from 0 to 4, when A is naphthalene, n is from 0 to 6, and when A is anthracene, n is from 0 to 8.
Claims37
An electret filter media comprising a fibrous web that comprises fibers comprising:
- thermoplastic resin, and
- a compound of the formula
- Y2-A(R1)n—Y1 (I)
- where A is benzene, naphthalene or anthracene,
- Y1 and Y2 are each independently R2-R3,
- R2 is an ester linking group or an amide linking group,
- R3 is a straight chain alkyl group having from 10 to 22 carbon atoms,
- R1 is R2-R3 where R2 and R3 are each independently as defined above, and
- when A is benzene, n is from 0 to 4,
- when A is naphthalene, n is from 0 to 6, and
- when A is anthracene, n is from 0 to 8.
A release surface that comprises:
- thermoplastic resin;
- and
- a compound of the formula
- Y2-A(R1)n—Y1 (I)
- where A is benzene, naphthalene or anthracene,
- Y1 and Y2 are each independently R2-R3,
- R2 is an ester linking group or an amide linking group,
- R3 is a straight chain alkyl group having from 10 to 22 carbon atoms,
- R1 is R2-R3 where R2 and R3 are each independently as defined above, and
- when A is benzene, n is from 0 to 4,
- when A is naphthalene, n is from 0 to 6, and
- when A is anthracene, n is from 0 to 8.
A thermoplastic composition that comprises:
- thermoplastic resin;
- and
- a compound of the formula
- Y2-A(R1)n—Y1 (I)
- where A is benzene, naphthalene or anthracene,
- Y1 and Y2 are each independently R2-R3,
- R2 is an ester linking group or an amide linking group,
- R3 is a straight chain alkyl group having from 10 to 22 carbon atoms,
- R1 is R2-R3 where R2 and R3 are each independently as defined above, and
- when A is benzene, n is from 0 to 4,
- when A is naphthalene, n is from 0 to 6, and
- when A is anthracene, n is from 0 to 8.
A compound of the formula:
- Y2-A(R1)n—Y1 (II)
- where
- A is naphthalene or anthracene,
- Y1 and Y2 are each independently R2-R3,
- R2 is an ester or an amide,
- R3 is an alkyl group having from 10 to 22 carbon atoms,
- R1 is R2-R3 where R2 and R3 are each independently as defined above, and
- when A is naphthalene, n is from 0 to 6,
- and when A is anthracene, n is from 0 to 8.
A compound of the formula:
- Y2-A(R1)n—Y1 (III)
- where
- A is benzene,
- Y1 and Y2 are each independently R2-R3,
- R2 is an ester or an amide,
- R3 is an alkyl group having from 10 to 22 carbon atoms,
- R1 is R2-R3 where R2 and R3 are each independently as defined above, at least one R1 is located meta to at least one of Y1 and Y2, and
- n is from 1 to 4.
Dependencies are inferred from the claim text.