Vibration damping monolithic polymers
AssigneeGeneral Electric Company
InventorsRamesh Hariharan, Gary Charles Davis, Suresh Subramanian
Life of this patent
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Abstract
The damping performance of an article and a polycarbonate composition is improved and a storage medium for data is provided which comprises the use of at least one ortho-methyl substituted polycarbonate structure.
Claims101
A storage medium for data, the storage medium comprising:
- 1) a substrate, a physical portion of which comprises at least one polycarbonate, and
- 2) at least one data layer on the substrate;
- the at least one polycarbonate comprising repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- and
- p is an integer selected from the group consisting of 1 and 2;
- provided when only repeating units having structure (IV) are present, one of R7 and R8 is other than CH3.
A storage medium for data, the storage medium comprising:
- 1) a substrate, a physical portion of which comprises at least one polycarbonate, and
- 2) at least one data layer on the substrate;
- the polycarbonate portion comprising residues of structure (VI):
A storage medium for data, the storage medium comprising:
- 1) a substrate, a physical portion of which comprises a polycarbonate;
- 2) at least one data layer on the substrate;
- the polycarbonate comprising:
- A) carbonate structural units corresponding to structure (I), (IV), or combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (II)
- where each R15 is selected independently from the group consisting of H and C1-C3 alkyl, and R16 and R17 are independently C1-C6 alkyl or aryl.
A storage medium for data, the storage medium comprising:
- 1) a substrate, a physical portion of which comprises at least one polycarbonate, and
- 2) at least one data layer on the substrate;
- the polycarbonate portion comprising:
- A) carbonate structural units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (III)
- where
- R8, R9, R12 and R13 are independently C1-C6 alkyl;
- R10 and R11 are independently H or C1-C5 alkyl;
- each R14 is independently selected from the group consisting of H and C1 -C3 alkyl;
- and
- each n is independently selected from the group consisting of 0, 1 and 2.
A polycarbonate composition with improved damping performance which comprises at least one compound having repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- and
- p is an integer selected from the group consisting of 1 and 2;
- provided when only repeating units having structure (IV) are present, one of R7 and R8 is other than CH3.
A polycarbonate composition with improved damping performance which comprises at least one compound of structure (VI):
A polycarbonate composition with improved damping performance which comprises at least one compound having repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (II)
- where each R15 is selected independently from the group consisting of H and C1-C3 alkyl, and R16 and R17 are independently C1-C6 alkyl or aryl.
A polycarbonate composition with improved damping performance which comprises at least one compound having repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (III)
- where
- R8, R9, R12 and R13 are independently C1-C6 alkyl;
- R10 and R11 are independently H or C1-C5 alkyl;
- each R14 is independently selected from the group consisting of H and C1-C3 alkyl;
- and
- each n is independently selected from the group consisting of 0, 1 and 2.
A method for improving the damping performance of an article, the method comprising constructing the article of a polycarbonate with at least one compound of structure (I), (IV), or combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- and
- p is an integer selected from the group consisting of 1 and 2.
A method for improving the damping performance of an article, the method comprising constructing the article of a polycarbonate with at least one compound of structure (VI):
A method for improving the damping performance of an article, the method comprising constructing the article of a polycarbonate with at least one compound comprising repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (II)
- where each R15 is selected independently from the group consisting of H and C1-C3 alkyl, and R16 and R17 are independently C1-C6 alkyl or aryl.
A method for improving the damping performance of an article, the method comprising constructing the article of a polycarbonate comprising repeating units selected from the group consisting of structure (I), structure (IV), and combinations thereof:
- where
- R1, R2, R3, R4, R5, and R6 are independently selected from the group consisting of C1-C6 alkyl and hydrogen;
- R7 and R8 are independently selected from the group consisting of C1-C6 alkyl, phenyl, C1-C6 alkyl substituted phenyl, or hydrogen;
- m is an integer in a range between 0 and about 12;
- q is an integer in a range between 0 and about 12;
- m+q is an integer in a range between about 4 and about 12;
- n is an integer selected from the group consisting of 1 and 2;
- p is an integer selected from the group consisting of 1 and 2;
- and
- B) carbonate structural units corresponding to structure (III)
- where
- R8, R9, R12 and R13 are independently C1-C6 alkyl;
- R10 and R11 are independently H or C1-C5 alkyl;
- each R14 is independently selected from the group consisting of H and C1-C3 alkyl;
- and
- each n is independently selected from the group consisting of 0, 1 and 2.
Dependencies are inferred from the claim text.