US4851474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer and method of preparing same
Assignee: Kraton Polymers US LLC
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Filing: 1987-09-29
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Granted: 1989-07-25
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Expires: 2007-09-29
Abstract
Abstract A modified unsaturated polyester useful in preparing molded products having improved impact resistance and surface characteristics is prepared as a block copolymer comprising at least one polyester block and an elastomeric block. The modified unsaturated polyester is prepared by reacting an elastomeric polymer having at least one terminal functional group selected from the group consisting of carboxyl groups, hydroxyl groups and mixtures thereof with either a preformed unsaturated polyester, thereby producing the modified unsaturated polyester directly or with monomer useful in preparing an unsaturated polyester and thereafter growing the unsaturated polyester via condensation of additional monomer. The elastomer is, preferably, a block copolymer comprising at least one polymer block containing predominantly monoalkenyl aromatic hydrocarbon monomer and at least one polymer block containing predominantly conjugated diolefin monomer units. The modified unsaturated polyester is useful in thermosetting resin compositions.
Inventors
- 👤 Carl L. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:33
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/027
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
25 words
A block copolymer consisting of a single unsaturated polyester block and a single substantially saturated elastomeric block that comprises predominantly hydrogenated conjugated diolefin monomer units.
Claim 2
Dependent Claim
25 words
A block copolymer consisting of a single unsaturated polyester block and a single substantially saturated elastomeric block that comprises predominantly hydrogenated conjugated diolefin monomer units.
Claim 3
Dependent Claim
42 words
The block copolymer of claim 1 wherein said substantially saturated elastomeric block is itself a block copolymer segment comprising at least one block containing predominantly monoalkenyl aromatic hydrocarbon monomer units and at least one block containing predominantly hydrogenated conjugated diolefin monomer units.
Claim 4
Dependent Claim
74 words
The block copolymer of claim 2 wherein said block containing predominantly monoalkenyl aromatic hydrocarbon monomer units has a weight average molecular weight within the range from about 1,000 to about 50,000, said block containing predominantly hydrogenated conjugated diolefin monomer units has a weight average molecular weight within the range from about 1,000 to about 150,000 and said polyester block has a weight average molecular weight within the range from about 150 to about 20,000.
Claim 5
Dependent Claim
14 words
The block copolymer of claim 3 wherein said elastomeric polymer block is a diblock.
Claim 6
Dependent Claim
20 words
The block copolymer of claim 4 wherein said monoalkenyl aromatic hydrocarbon monomer is styrene and said conjugated diolefin is butadiene.
Claim 7
Dependent Claim
23 words
The block copolymer of claim 5 wherein said polyester block contains maleic acid or maleic anhydride monomer units and propylene glycol monomer units.
Claim 8
Dependent Claim
37 words
A thermosetting unsaturated polyester resin composition comprising a block copolymer that consists of a single unsaturated polyester block and a single substantially saturated elastomeric polymer block, the elastomeric polymer block containing predominantly hydrogenated conjugated diolefin monomer units.
Claim 9
Dependent Claim
37 words
A thermosetting unsaturated polyester resin composition comprising a block copolymer that consists of a single unsaturated polyester block and a single substantially saturated elastomeric polymer block, the elastomeric polymer block containing predominantly hydrogenated conjugated diolefin monomer units.
Claim 10
Dependent Claim
40 words
The thermosetting polyester unsaturated resin composition of claim 7 wherein said elastomeric block is itself a block copolymer segment comprising at least one block containing predominantly monoalkenyl aromatic hydrocarbon monomer units and at least one block containing diolefin monomer units.
Claim 11
Dependent Claim
70 words
The thermosetting polyester resin composition of claim 8 wherein said block containing predominantly monoalkenyl aromatic hydrocarbon units has a weight average molecular weight within the range from about 1,000 to about 50,000, said block containing predominantly conjugated diolefin monomer units has a weight average molecular weight within the range from about 1,000 to about 150,000 and said polyester block has weight average molecular weight from about 150 to about 20,000.
Claim 12
Dependent Claim
16 words
The thermosetting polyester resin composition of claim 9 wherein said elastomeric polymer block is a diblock.
Claim 13
Dependent Claim
23 words
The thermosetting polyester resin composition of claim 10 wherein said monoalkenyl aromatic hydrocarbon monomer is styrene and said conjugated diolefin monomer is butadiene.
Claim 14
Dependent Claim
24 words
The thermosetting polyester resin composition of claim 11 wherein said polyester contains maleic acid or maleic anhydride monomer units and propylene glycol monomer units.
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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) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |