US4837294A
Expired / Lapsed
US
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Polyarylene thioether composition containing polyarylene ether nucleating agent
Assignee: Kureha Corp
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Filing: 1988-04-15
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Granted: 1989-06-06
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Expires: 2008-04-15
Abstract
Abstract A polyarylene thioether composition for molding comprises a polyarylene thioether (A) which contains not less than 70 wt% of a repeating unit <CHEM> and 0.01 to 15 parts by weight, per 100 parts by weight of the said polyarylene thioether (A), of a polyarylene thioether (B) as a nucleating agent, the said polyarylene thioether (B) containing not less than 50 wt% of a repeating unit <CHEM> and having a melting point of not lower than 290 DEG C or a melt crystallization temperature of not lower than 220 DEG C.
Inventors
- 👤 Yukio Ichikawa
- 👤 Takashi Kaneko
- 👤 Yoshikatsu Satake
- 👤 Takayuki Katto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:52
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
25 words
A polyarylene thioether composition comprising: 100 parts by weight of (A) which contains not less than 70 wt % of a repeating unit of ##STR27##
Claim 2
Dependent Claim
25 words
A polyarylene thioether composition comprising: 100 parts by weight of (A) which contains not less than 70 wt % of a repeating unit of ##STR27##
Claim 3
Dependent Claim
96 words
and 0. 01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR28## as the main constituent and has a melting point of not lower than 290° C. or a melt crystallization temperature of not lower than 220° C.; and a 50% crystallization time, τ 1/2 , at 250° C. of said polyarylene thioether composition being not more than 1/1.5 of the 50% crystallization time of a polyarylene thioether which does not contain said polyarylene thioether (B).
Claim 4
Dependent Claim
96 words
and 0. 01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR28## as the main constituent and has a melting point of not lower than 290° C. or a melt crystallization temperature of not lower than 220° C.; and a 50% crystallization time, τ 1/2 , at 250° C. of said polyarylene thioether composition being not more than 1/1.5 of the 50% crystallization time of a polyarylene thioether which does not contain said polyarylene thioether (B).
Claim 5
Dependent Claim
41 words
The polyarylene thioether composition according to claim 1, wherein said polyarylene thioether (A) is a block copolymer of 70 to 95 wt % of a repeating unit of ##STR29## and 5 to 30 wt % of a repeating unit of ##STR30##
Claim 6
Dependent Claim
18 words
The polyarylene thioether composition according to claim 1, wherein said polyarylene thioether (B) is a p,p'-diphenylene thioether homopolymer.
Claim 7
Dependent Claim
35 words
The polyarylene thioether composition according to claim 3, wherein said p,p'-diphenylene thioether homopolymer is a polymer having a melting point of 400° to 450° C. or a melt crystallization temperature of 280° to 350° C..
Claim 8
Dependent Claim
35 words
The polyarylene thioether composition according to claim 1, wherein said polyarylene thioether (B) is a copolymer containing not less than 50 wt % of p,p'-diphenylene thioether and less than 50 wt % of p-phenylene thioether.
Claim 9
Dependent Claim
28 words
A polyarylene thioether composition comprising: 100 parts by weight of a polyarylene thioether (A) which contains not less than 70 wt % of a repeating unit of ##STR31##
Claim 10
Dependent Claim
28 words
A polyarylene thioether composition comprising: 100 parts by weight of a polyarylene thioether (A) which contains not less than 70 wt % of a repeating unit of ##STR31##
Claim 11
Dependent Claim
57 words
01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR32## as the main constituent and has a melting point of not lower than 290° C. or a melt crystallization temperature of not lower than 220° C.; and
Claim 12
Dependent Claim
57 words
01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR32## as the main constituent and has a melting point of not lower than 290° C. or a melt crystallization temperature of not lower than 220° C.; and
Claim 13
Dependent Claim
60 words
1 to 300 parts by weight of an inorganic filler, a fibrous filler or a mixture of two or more thereof; and a 50% crystallization time, τ 1/2 , at 250° C. of said polyarylene thioether composition is not more than 1/1.5 of a 50% crystallization time of a polyarylene thioether composition which does not contain said polyarylene thioether (B).
Claim 14
Dependent Claim
60 words
1 to 300 parts by weight of an inorganic filler, a fibrous filler or a mixture of two or more thereof; and a 50% crystallization time, τ 1/2 , at 250° C. of said polyarylene thioether composition is not more than 1/1.5 of a 50% crystallization time of a polyarylene thioether composition which does not contain said polyarylene thioether (B).
Claim 15
Dependent Claim
41 words
The polyarylene thioether composition according to claim 6, wherein said polyarylene thioether (A) is a block copolymer of 70 to 95 wt % of a repeating unit of ##STR33## and 5 to 30 wt % of a repeating unit of ##STR34##
Claim 16
Dependent Claim
18 words
The polyarylene thioether composition according to claim 6, wherein said polyarylene thioether (B) is a p,p'-diphenylene thioether homopolymer.
Claim 17
Dependent Claim
35 words
The polyarylene thioether composition according to claim 8, wherein said p,p'-diphenylene thioether homopolymer is a polymer having a melting point of 400° to 450° C. or a melt crystallization temperature of 280° to 350° C.
Claim 18
Dependent Claim
35 words
The polyarylene thioether composition according to claim 6, wherein said polyarylene thioether (B) is a copolymer of not less than 50 wt % of p,p'-diphenylene thioether and less than 50 wt % of p-phenylene thioether.
References Cited (Backward Citations)
JPH01231030A
Cited
JPH02192831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |