US3880955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lactone-containing polymers
Assignee: Phillips Petroleum Co
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Filing: 1973-04-16
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Granted: 1975-04-29
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Expires: 1993-04-16
Abstract
Abstract A polyaziridinyl compound having at least two aziridinyl groups per molecule is employed in producing lactone copolymers from a base polymer and a lactone monomer.
Inventors
- 👤 Henry L Hsieh
- 👤 Ollie G Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:02
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
41 words
IN A METHOD OF MAKING A BLOCK COPOLYMER BY REACTING A LACTONE MONOMER WITH A BASE POLYMER WHICH IS A POLYMER OF A CONJUGATED DIENE OR A COPOLYMER THEREOF WITH A VINYL AROMATIC COMPOUND, SAID BASE POLYMER HAVING AT LEAST ONE
Claim 2
Dependent Claim
41 words
IN A METHOD OF MAKING A BLOCK COPOLYMER BY REACTING A LACTONE MONOMER WITH A BASE POLYMER WHICH IS A POLYMER OF A CONJUGATED DIENE OR A COPOLYMER THEREOF WITH A VINYL AROMATIC COMPOUND, SAID BASE POLYMER HAVING AT LEAST ONE
Claim 3
Dependent Claim
29 words
The method of claim 1 in which said aziridinyl groups are contained in a polyaziridinyl compound in which said groups are attached to a carbon, phosphorous or sulfur atom.
Claim 4
Dependent Claim
59 words
The method of claim 1 in which the base polymer is prepared by use of an alkali metal initiator, and said polyaziridinyl compound is introduced in an amount within the range of from about 1 to about 0.5 to about 1 to about 50 equivalents of said alkali metal initiator to equivalents of aziridinyl groups in said polyaziridinyl compound.
Claim 5
Dependent Claim
29 words
The method of claim 1 in which said base polymer and said lactone monomer are contacted with said polyaziridinyl compound after said lactone monomer has been substantially completely polymerized.
Claim 6
Dependent Claim
23 words
The method of claim 4 in which tri(2-methyl-1-aziridinyl)-phosphine oxide is contacted with a polystyrene-polybutadiene base polymer which has been reacted with epsilon -caprolactone.
Claim 7
Dependent Claim
32 words
The method of claim 5 in which the base polymer is formed by polymerizing styrene in the presence of an organo-lithium initiator, after which 1,3-butadiene is added to form the base polymer.
Claim 8
Dependent Claim
34 words
The method of claim 1 in which said polyaziridinyl compound is selected from the group consisting of triaziridinyl-substituted triazines, triphosphatriazines containing from about 2 to about 6 aziridinyl-substituted rings, triaziridinylphosphine oxides and triaziridinylphosphine sulfides.
Claim 9
Dependent Claim
9 words
A copolymer prepared by the method of claim 1.
Claim 10
Independent Claim
52 words
A method of producing a copolymer comprising polymerizing styrene by use of n-butyllithium as the initiator, thereafter adding 1,3-butadiene under conditions to polymerize the 1,3-butadiene, thereafter adding epsilon -caprolactam under conditions to polymerize the epsilon -caprolactone, and finally adding tri(2-methyl-1-aziridinyl)phosphine oxide under conditions to react said oxide with the material theretofore formed.
Claim 11
Independent Claim
52 words
A method of producing a copolymer comprising polymerizing styrene by use of n-butyllithium as the initiator, thereafter adding 1,3-butadiene under conditions to polymerize the 1,3-butadiene, thereafter adding epsilon -caprolactam under conditions to polymerize the epsilon -caprolactone, and finally adding tri(2-methyl-1-aziridinyl)phosphine oxide under conditions to react said oxide with the material theretofore formed.
Claim 12
Dependent Claim
9 words
A copolymer prepared by the method of claim 9.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |