US5428113A
Expired / Lapsed
US
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Piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer and process for producing the same
Assignee: Tomoegawa Co Ltd
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Filing: 1994-10-18
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Granted: 1995-06-27
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Expires: 2014-10-18
Abstract
Abstract The piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer of this invention is a novel substance useful as an adhesive component for adhesive tapes, which tapes are used in the interior of a resin-sealed type semiconductor device. The copolymer has a weight average molecular weight of 10,000-200,000, and is represented by the following general formula (I) and obtained by condensing a carboxyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000 with N-aminoethylpiperazine in the presence of a phosphite and a pyridine derivative to undergo the amidation. ##STR1## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93.
Inventors
- 👤 Yukinori Sakumoto
- 👤 Takeshi Hashimoto
- 👤 Katsuji Nakaba
- 👤 Masaharu Kobayashi
- 👤 Takeshi Nishigaya
- 👤 Fumiyoshi Yamanashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:19
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36; C08F236/00; C08F236/02; C08F236/04; C08F236/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, represented by the following formula (I): ##STR5## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93.
Claim 2
Dependent Claim
52 words
A piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, represented by the following formula (I): ##STR5## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93.
Claim 3
Dependent Claim
20 words
The piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer as claimed in claim 1, wherein the content of the acrylonitrile unit is 5-50% by weight.
Claim 4
Dependent Claim
15 words
The piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer as claimed in claim 1, wherein the amino equivalent is 500-10,000.
Claim 5
Dependent Claim
123 words
A process for producing a piperazinylethyl-aminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, represented by the following formula (I), ##STR6## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93, which comprises condensing a carboxyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000 represented by the following formula (II): ##STR7## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and n is a number in the range of 0.3-93, with N-aminoethylpiperazine in the presence of a phosphite and a pyridine derivative.
Claim 6
Dependent Claim
123 words
A process for producing a piperazinylethyl-aminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, represented by the following formula (I), ##STR6## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93, which comprises condensing a carboxyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000 represented by the following formula (II): ##STR7## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and n is a number in the range of 0.3-93, with N-aminoethylpiperazine in the presence of a phosphite and a pyridine derivative.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |