US4412062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer stabilization
Assignee: Phillips Petroleum Co
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Filing: 1982-06-25
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Granted: 1983-10-25
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Expires: 2002-06-25
Abstract
Abstract The addition of cure retarders chosen from among the following classes of compounds: tetraoxaphosphaspiroundecane, 4-hydroxybenzyl isocyanurate, N-hydrocarbylthiophthalimide, and trihydrocarbyl trithiophosphite improves the melt stability and reduces the melt viscosity of arylene sulfide resins, such as poly(phenylene sulfide) resin.
Inventors
- 👤 Jerry O. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
59 words
A resin composition exhibiting improved melt stability and reduced melt viscosity when subjected to heat comprising a poly(arylene sulfide) resin containing an effective amount sufficient to retard resin curing or cross-linking and to reduce polymer melt viscosity of at least one compound chosen from among the classes of compounds consisting essentially of tetraoxaphosphaspiroundecane, 4-hydroxybenzyl isocyanurate, N-hydrocarbylthiophthalimide, and trihydrocarbyl trithiophosphite.
Claim 2
Dependent Claim
59 words
A resin composition exhibiting improved melt stability and reduced melt viscosity when subjected to heat comprising a poly(arylene sulfide) resin containing an effective amount sufficient to retard resin curing or cross-linking and to reduce polymer melt viscosity of at least one compound chosen from among the classes of compounds consisting essentially of tetraoxaphosphaspiroundecane, 4-hydroxybenzyl isocyanurate, N-hydrocarbylthiophthalimide, and trihydrocarbyl trithiophosphite.
Claim 3
Dependent Claim
11 words
An article of manufacture formed from the composition of claim 1.
Claim 4
Dependent Claim
9 words
A fiber formed from the composition of claim 1.
Claim 5
Dependent Claim
9 words
A film formed from the composition of claim 1.
Claim 6
Dependent Claim
30 words
A composition according to claim 1 wherein the amount of additive present ranges from about 0.2 to about 5 weight percent based on the weight of the arylene sulfide polymer.
Claim 7
Dependent Claim
25 words
A composition according to claim 5 wherein said arylene sulfide polymer is a poly(phenylene sulfide) having a melt flow of about 20 to about 400.
Claim 8
Dependent Claim
33 words
A composition according to claim 1 wherein said compound is a tetraoxaphosphaspiroundecane having the formula ##STR5## where R 1 and R 2 are selected from the group consisting of aryl, alkyl, and alkaryl.
Claim 9
Dependent Claim
24 words
A composition according to claim 7 wherein said arylene sulfide polymer is poly(phenylene sulfide) and said tetraoxaphosphaspiroundecane is chosen from among 3,9-diphenoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane and di(2,4-di-t-butylphenyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane
Claim 10
Dependent Claim
13 words
A composition according to claim 1 wherein said compound is a 4-hydroxybenzyl isocyanurate.
Claim 11
Dependent Claim
12 words
A composition according to claim 9 wherein said 4-hydroxybenzyl isocyanurate is tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate.
Claim 12
Dependent Claim
12 words
A composition according to claim 1 wherein said compound is an N-hydrocarbylthiophthalimide.
Claim 13
Dependent Claim
11 words
A composition according to claim 10 wherein said N-hydrocarbylthiophthalimide is N-(cyclohexylthio)phthalimide.
Claim 14
Dependent Claim
13 words
A composition according to claim 1 wherein said compound is a trihydrocarbyl trithiophosphite.
Claim 15
Dependent Claim
13 words
A composition according to claim 13 wherein said trihydrocarbyl trithiophosphite is trilauryl trithiophosphite.
Claim 16
Independent Claim
62 words
A method for improving the melt stability and reducing the melt viscosity of poly(arylene sulfide) resins which comprises incorporating therein an effective amount of a compound chosen from the classes of compounds consisting essentially of tetraoxaphosphaspiroundecane, 4-hydroxybenzyl isocyanurate, N-hydrocarbylthiophthalimide, and trihydrocarbyl trithiophosphite which amount is sufficient to retard curing or cross-linking and to reduce the melt viscosity of said resin during heating.
Claim 17
Independent Claim
62 words
A method for improving the melt stability and reducing the melt viscosity of poly(arylene sulfide) resins which comprises incorporating therein an effective amount of a compound chosen from the classes of compounds consisting essentially of tetraoxaphosphaspiroundecane, 4-hydroxybenzyl isocyanurate, N-hydrocarbylthiophthalimide, and trihydrocarbyl trithiophosphite which amount is sufficient to retard curing or cross-linking and to reduce the melt viscosity of said resin during heating.
Claim 18
Dependent Claim
30 words
A method according to claim 15 wherein the amount of said compound ranges from about 0.2 to about 5 weight percent based on the weight of the arylene sulfide polymer.
Claim 19
Dependent Claim
14 words
A process according to claim 15 wherein said arylene sulfide polymer is poly(phenylene sulfide).
Claim 20
Dependent Claim
32 words
A method according to claim 15 wherein said compound is tetraoxaphosphaspiroundecane having the formula ##STR6## where R 1 and R 2 are selected from the group consisting of aryl, alkyl, and alkaryl.
Claim 21
Dependent Claim
20 words
A method of claim 18 in which said tetraoxaphosphaspiroundecane is chosen from the group consisting essentially of 3,9-diphenoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane and di(2,4-di-t-butylphenyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane.
Claim 22
Dependent Claim
13 words
A method according to claim 15 wherein said compound is a 4-hydroxybenzyl isocyanurate.
Claim 23
Dependent Claim
12 words
A method according to claim 20 wherein said 4-hydroxybenzyl isocyanurate is tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate.
Claim 24
Dependent Claim
12 words
A method according to claim 15 wherein said compound is an N-hydrocarbylthiophthalimide.
Claim 25
Dependent Claim
11 words
A method according to claim 22 wherein said N-hydrocarbylthiophthalimide is N-(cyclohexylthio)phthalimide.
Claim 26
Dependent Claim
13 words
A method according to claim 15 wherein said compound is a trihydrocarbyl trithiophosphite.
Claim 27
Dependent Claim
13 words
A method according to claim 24 wherein said trihydrocarbyl trithiophosphite is trilauryl trithiophosphite.
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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |