Patent US4319003A successfully refreshed from Google Patents.
US4319003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(methyl methacrylate) polycarbonate block copolymers
Assignee: Motors Liquidation Co
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Filing: 1980-09-26
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Granted: 1982-03-09
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Expires: 2000-09-26
Abstract
Abstract Poly(methyl methacrylate) is modified to have improved impact resistance by forming an ABA-type block copolymer where the A segments are poly(methyl methacrylate) and the B segment is polycarbonate. The ABA block copolymer is moldable, transparent and has a number average molecular weight (Mn) in the range of from about 15,000 to 100,000.
Inventors
- 👤 Zachariah G. Gardlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:02
CPC Classifications
C; C08; C08F; C08F293/00; C08G; C08G64/00; C08G64/18; C08G81/00; C08G81/02; C08G81/024; C08G81/027
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
An impact resistant, moldable, transparent, thermoplastic block copolymer of the ABA type wherein the A segments are poly(methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and the B segment is polycarbonate having a number average molecular weight (Mn) in the range of from about 500 to 30,000 said block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000.
Claim 2
Dependent Claim
76 words
An impact resistant, moldable, transparent, thermoplastic block copolymer of the ABA type wherein the A segments are poly(methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and the B segment is polycarbonate having a number average molecular weight (Mn) in the range of from about 500 to 30,000 said block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000.
Claim 3
Dependent Claim
95 words
A transparent, colorless, thermoplastic block copolymer of the ABA type having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000 which is the reaction product of linear A segments of poly(methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and a chloroformate group at one end, and linear B segments of polycarbonate terminated at both ends with a functional hydroxyl group, said B segments having a number average molecular weight (Mn) in the range of from about 500 to 30,000.
Claim 4
Dependent Claim
95 words
A transparent, colorless, thermoplastic block copolymer of the ABA type having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000 which is the reaction product of linear A segments of poly(methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and a chloroformate group at one end, and linear B segments of polycarbonate terminated at both ends with a functional hydroxyl group, said B segments having a number average molecular weight (Mn) in the range of from about 500 to 30,000.
Claim 5
Dependent Claim
52 words
A transparent, impact resistant, injection moldable block copolymer of the ABA-type where the A segments are poly(methyl methacrylate) and the B segment is polycarbonate, said block copolymer having a number average molecular weight (Mn) of less than about 100,000 and an elongation at yield greater than 5% as determined by ASTM D882-75B.
Claim 6
Dependent Claim
52 words
A transparent, impact resistant, injection moldable block copolymer of the ABA-type where the A segments are poly(methyl methacrylate) and the B segment is polycarbonate, said block copolymer having a number average molecular weight (Mn) of less than about 100,000 and an elongation at yield greater than 5% as determined by ASTM D882-75B.
Claim 7
Dependent Claim
79 words
A transparent moldable impact resistant block copolymer of the ABA-type wherein the B block is polycarbonate having a number average molecular weight of from about 500 to 30,000 and wherein the A blocks are poly(methyl methacrylate) segments of substantially similar chain length, said segments having a number average molecular weight (Mn) in the range of from about 500 to 35,000, the block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000.
Claim 8
Dependent Claim
79 words
A transparent moldable impact resistant block copolymer of the ABA-type wherein the B block is polycarbonate having a number average molecular weight of from about 500 to 30,000 and wherein the A blocks are poly(methyl methacrylate) segments of substantially similar chain length, said segments having a number average molecular weight (Mn) in the range of from about 500 to 35,000, the block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000.
Claim 9
Dependent Claim
114 words
A transparent, method of making impact resistant, colorless, transparent, thermoplastic polymers comprising reacting linear polycarbonate terminated at both ends with hydroxy groups having a number average molecular weight (Mn) in the range of from about 500 to 30,000 with an amount of linear poly (methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and a functional chloroformate group at one end sufficient to combine with said hydroxyl groups to thereby yield an ABA type block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000 where the A segments are poly(methyl methacrylate) and the B segments are polycarbonate.
Claim 10
Dependent Claim
114 words
A transparent, method of making impact resistant, colorless, transparent, thermoplastic polymers comprising reacting linear polycarbonate terminated at both ends with hydroxy groups having a number average molecular weight (Mn) in the range of from about 500 to 30,000 with an amount of linear poly (methyl methacrylate) having a number average molecular weight (Mn) in the range of from about 500 to 35,000 and a functional chloroformate group at one end sufficient to combine with said hydroxyl groups to thereby yield an ABA type block copolymer having a number average molecular weight (Mn) in the range of from about 15,000 to 100,000 where the A segments are poly(methyl methacrylate) and the B segments are polycarbonate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |