Patent US4786669A successfully refreshed from Google Patents.
US4786669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightly cross-linked resin materials
Assignee: Resolution Performance Products LLC
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Filing: 1986-06-09
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Granted: 1988-11-22
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Expires: 2006-06-09
Abstract
Abstract The present invention relates to a new polymer composition having the processing characteristics of a thermosetting polymer along with an improved balance of properties including improved modulus/glass transition temperature/toughness balance. These new polymer compositions are prepared by reacting certain diphenolic compounds with certain diepoxide compounds to form linear units which are lightly crosslinked through the resulting secondary hydroxyl groups. Also disclosed and claimed are processes for preparing such compositions, cured compositions and end-use applications.
Inventors
- 👤 Kenneth C. Dewhirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:30
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/20; C08G59/32; C08G59/38; C08G59/40; C08G59/50; C08G59/5033; C08G59/62; C08G59/621; C08G59/64
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
234 words
A polymer composition comprising lightly crosslinked linear molecules having the repeating structures prior to crosslinking of the general formula: ##STR27## wherein said repeating structures are lightly crosslinked such that between 1 and 50 of said repeating structures per 100 total repeating structures are crosslinked to repeating structures of other molecules, and where: (a) "X" represents a segment comprising stiff units (SU) and optional flexible units (FU), which stiff units and flexible units are interconnected; (b) "Y" represents a segment comprising stiff units (SU') and optional flexible units (FU') which stiff units and flexible units are interconnected; (c) said stiff units, SU and SU', are independently selected from the group consisting of substituted and non-substituted aromatic rings and non-interferring heterocyclic rings; (d) said flexible units, FU and FU', are independenly selected from the group consisting of ##STR28## (e) the number of X segments in said molecules is "a", the number of y segments in said molecules is "b", the number of stiff units and flexible units is selected such that the average number of total stiff units ##EQU13## divided by the average number of total flexible units ##EQU14## is less than or equal to four; and (f) the ratio of the number of stiff units to flexible units in said X segment (SU/FU) is equal to or greater than the ratio of the number of stiff units to flexible units in said y segment (SU'/FU').
Claim 2
Dependent Claim
234 words
A polymer composition comprising lightly crosslinked linear molecules having the repeating structures prior to crosslinking of the general formula: ##STR27## wherein said repeating structures are lightly crosslinked such that between 1 and 50 of said repeating structures per 100 total repeating structures are crosslinked to repeating structures of other molecules, and where: (a) "X" represents a segment comprising stiff units (SU) and optional flexible units (FU), which stiff units and flexible units are interconnected; (b) "Y" represents a segment comprising stiff units (SU') and optional flexible units (FU') which stiff units and flexible units are interconnected; (c) said stiff units, SU and SU', are independently selected from the group consisting of substituted and non-substituted aromatic rings and non-interferring heterocyclic rings; (d) said flexible units, FU and FU', are independenly selected from the group consisting of ##STR28## (e) the number of X segments in said molecules is "a", the number of y segments in said molecules is "b", the number of stiff units and flexible units is selected such that the average number of total stiff units ##EQU13## divided by the average number of total flexible units ##EQU14## is less than or equal to four; and (f) the ratio of the number of stiff units to flexible units in said X segment (SU/FU) is equal to or greater than the ratio of the number of stiff units to flexible units in said y segment (SU'/FU').
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the average number of total stiff units divided by the average number of total flexible units is greater than 1.5 and less than 4.
Claim 4
Dependent Claim
25 words
The composition of claim 2 wherein the average number of total siff units divided by the average number of total flexible units is about 2.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said stiff units are non-substituted aromatic rings.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein said flexible units are ##STR29##
Claim 7
Dependent Claim
10 words
The composition of claim 1 wherein the ratio of ##EQU15##
Claim 8
Dependent Claim
33 words
The composition of claim 1 wherein said repeating structures are lightly crosslinked such that between 1 and about 20 repeating structures from different molecules per 100 of said repeating structures are crosslinked together.
Claim 9
Dependent Claim
17 words
The composition of claim 7 wherein between 3 and 10 per 100 repeating structures are crosslinked together.
Claim 10
Dependent Claim
11 words
The composition of claim 1 which further comprises a crosslinking agent.
Claim 11
Dependent Claim
38 words
The composition of claim 9 wherein an effective amount of crosslinking agent is employed such that between about 1 and about 50 repeating structures from different molecules per 100 of said repeating structures are crosslinked together during cure.
Claim 12
Dependent Claim
12 words
The composition of claim 7 which further comprises a fibrous reinforcing material.
Claim 13
Dependent Claim
12 words
The composition of claim 10 which further comprises a fibrous reinforcing material.
Claim 14
Dependent Claim
26 words
The composition of claim 11 wherein the fibrous reinforcing material is selected from the group consisting of glass fibers, carbon fibers, boron fibers and Kevlar fibers.
Claim 15
Dependent Claim
26 words
The composition of claim 12 wherein the fibrous reinforcing material is selected from the group consisting of glass fibers, carbon fibers, boron fibers and Kevlar fibers.
Claim 16
Dependent Claim
16 words
The cured composition of claim 14 having a glass transition temperature up to about 150° C.
Claim 17
Dependent Claim
13 words
A prepreg comprising the composition of claim 10 and a fibrous reinforcing material.
Claim 18
Dependent Claim
8 words
A prepreg comprising the composition of claim 14.
Claim 19
Dependent Claim
11 words
An article of manufacture prepared from the prepreg of claim 16.
Claim 20
Dependent Claim
32 words
The composition of claim 1 having a glass transition temperature up to about 150° C., a flex modulus of at least 250 KSI and a fracture toughness of at least 1000 psi√in.
Claim 21
Dependent Claim
34 words
The composition of claim 9 wherein the crosslinking agent is selected from the group consisting of tri- or higher functional epoxides, tri- or higher functional phenolics, tri- or higher functional amines or mixtures thereof.
Claim 22
Dependent Claim
100 words
The composition of claim 1 wherein said linear molecules are prepared by the process comprising reacting: (a) a first component selected from the group consisting of phenol compounds of the formula HO--X--OH and HO--Y--OH; (b) a second component selected from the group consisting of diepoxide compounds of the structures: ##STR30## and wherein n is 0 to 6 (c) a catalytic amount of a basic condensation catalyst at an elevated temperature and with a molar ratio of phenol compounds to diepoxides of about 0.90 to about 1.04 until the desired linear reaction product has been formed, and thereafter stopping the reaction.
Claim 23
Dependent Claim
25 words
The composition of claim 21 wherein said first and second components are reacted together in the presence of an effective amount of a crosslinking agent.
Claim 24
Dependent Claim
34 words
The compositions of claim 22 wherein the crosslinking agent is selected from the group consisting of tri- or higher functional epoxides, tri- or higher functional phenolics, tri- or higher functional amines or mixtures thereof.
Claim 25
Dependent Claim
37 words
The composition of claim 23 wherein the amount of crosslinking agent employed is such that between about 1 and about 50 repeating structures from different molecules per 100 of said repeating structures are crosslinked together during cure.
Claim 26
Dependent Claim
24 words
The composition of claim 21 wherein the amount of catalyst employed is not in excess of 0.1 mole per mole of said first component.
Claim 27
Dependent Claim
31 words
The composition of claim 21 wherein said first and second components are reacted at a temperature of about 130° C. to about 230° C. for about 1 to about 24 hours.
Claim 28
Dependent Claim
21 words
The composition of claim 21 wherein said first component is BPA and said second component is the diglycidyl ether of BPA.
Claim 29
Dependent Claim
9 words
The composition of claim 1 wherein X is ##STR31##
Claim 30
Dependent Claim
9 words
The composition of claim 28 wherein Y is ##STR32##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |