Patent US4131591A successfully refreshed from Google Patents.
US4131591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral-filled nylon molding compositions exhibiting low creep
Assignee: Honeywell International Inc
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Filing: 1977-08-29
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Granted: 1978-12-26
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Expires: 1997-08-29
Abstract
Abstract Polyamide molding compositions comprising a polyamide resin, about 5 to 40 percent by weight, based on the total weight of the compositions, of talc in the form of platy fine particles having a surface are of about at least about 72m /g; about 2 to 40 percent by weight, based on the total weight of the composition, of wollastonite; and about 5 to 25 percent by weight, based on the total weight of the composition, of fiber glass. Preferably, about 0.1 to 4 weight percent, based on the weight of the wollastonite, of a coupling agent is present. These molding compositions are capable of providing molded articles having a creep slope of </=0.15 percent strain per log time.
Inventors
- 👤 Robert MacFarlane, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:01
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/04
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
116 words
A polyamide molding composition comprising: (a) polyamide resin; (b) about 5 to 40 weight percent, based on the total weight of the composition, of substantially asbestos free talc in the form of platy fine particles having a surface area of at least about 7 m 2 /g; (c) about 2 to 40 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 5 to 25 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 percent strain per log time.
Claim 2
Dependent Claim
116 words
A polyamide molding composition comprising: (a) polyamide resin; (b) about 5 to 40 weight percent, based on the total weight of the composition, of substantially asbestos free talc in the form of platy fine particles having a surface area of at least about 7 m 2 /g; (c) about 2 to 40 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 5 to 25 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 percent strain per log time.
Claim 3
Dependent Claim
11 words
The molding composition of claim 1 wherein the polyamide is polycaprolactam.
Claim 4
Dependent Claim
21 words
The molding composition of claim 1 wherein the talc is present in an amount of about 10 to 30 weight percent.
Claim 5
Dependent Claim
21 words
The molding composition of claim 1 wherein the talc comprises particles of which at least 80% are of a platy nature.
Claim 6
Dependent Claim
18 words
The molding composition of claim 1 wherein the talc contains less than about 1% of Na 2 O.
Claim 7
Dependent Claim
26 words
the molding composition of claim 1 wherein the talc particles have a surface area of about 8 to 11 m 2 /g (N 2 , BET).
Claim 8
Dependent Claim
21 words
The molding composition of claim 1 wherein the wollastonite is present in an amount of about 2 to 20 weight percent.
Claim 9
Dependent Claim
22 words
The molding composition of claim 1 wherein the fiber glass is present in an amount of about 7 to 18 weight percent.
Claim 10
Dependent Claim
23 words
The molding composition of claim 1 including about 0.1 to 4 weight percent, based on the weight of wollastonite, of a coupling agent.
Claim 11
Dependent Claim
14 words
The molding composition of claim 9 wherein the coupling agent is a silane compound.
Claim 12
Dependent Claim
32 words
The molding composition of claim 10 wherein the silane compound is gamma aminopropyltriethoxysilane and is present in an amount of about 0.25 to 2 weight percent, based on the weight of wollastonite.
Claim 13
Dependent Claim
53 words
The molding composition of claim 1 wherein the polyamide is polycaprolactam and containing about 10 to 30 weight percent talc, about 2 to 20 weight percent wollastonite and about 7 to 18 weight percent fiber glass, and 0.1 to 4 weight percent, based on the weight of wollastonite, of a silane coupling agent.
Claim 14
Dependent Claim
15 words
The molding composition of claim 12 wherein the wollastonite is pretreated with said coupling agent.
Claim 15
Dependent Claim
22 words
The molding composition of claim 1 having a creep slope of less than about 0.15 percent strain per log time when molded.
Claim 16
Dependent Claim
25 words
A molded article formed from the composition of claim 12 and having a creep slope of less than about 0.15 percent strain per log time.
Claim 17
Dependent Claim
116 words
A polyamide molding composition comprising: (a) a polyamide resin; (b) about 15 to 25 weight percent, based on the total weight of the composition, of substantially asbestos free talc in the form of platy fine particles having a surface area of at least 7 m 2 /g; (c) about 5 to 10 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 14 to 16 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 percent strain per log time.
Claim 18
Dependent Claim
116 words
A polyamide molding composition comprising: (a) a polyamide resin; (b) about 15 to 25 weight percent, based on the total weight of the composition, of substantially asbestos free talc in the form of platy fine particles having a surface area of at least 7 m 2 /g; (c) about 5 to 10 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 14 to 16 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 percent strain per log time.
Claim 19
Dependent Claim
11 words
The molding composition of claim 16 wherein said polyamide is polycaprolactam.
Claim 20
Dependent Claim
21 words
The molding composition of claim 16 wherein the talc comprises particles of which at least 80% are of a platy nature.
Claim 21
Dependent Claim
18 words
The molding composition of claim 16 wherein the talc contains less than about 1% of Na 2 O.
Claim 22
Dependent Claim
26 words
The molding composition of claim 16 wherein the talc particles have a surface area of about 8 to 11 m 2 /g (N 2 , BET).
Claim 23
Dependent Claim
23 words
The molding composition of claim 16 including about 0.1 to 4 weight percent, based on the weight of wollastonite, of a coupling agent.
Claim 24
Dependent Claim
14 words
The molding composition of claim 21 wherein the coupling agent is a silane compound.
Claim 25
Dependent Claim
32 words
The molding composition of claim 22 wherein the silane compound is gamma aminopropyltriethoxysilane and is present in an amount of about 0.25 to 2 wt. %, based on the weight of wollastonite.
Claim 26
Dependent Claim
18 words
The molding composition of claim 23 wherein the wollastonite is pretreated with the coupling agent of claim 21.
Claim 27
Dependent Claim
17 words
The molding composition of claim 16 having a creep slope of less than about 0.15 when molded.
Claim 28
Dependent Claim
25 words
A molded article formed from the composition of claim 21 and having a creep slope of about 0.05 to 0.10 percent strain per log time.
Claim 29
Dependent Claim
116 words
A polyamide molded composition comprising: (a) polyamide resin; (b) about 5 to 40 weight percent, based on the total weight of the composition of substantially asbestos free talc in the form of platy fine particles having a surface area of at least about 7 m 2 /g; (c) about 2 to 40 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 5 to 25 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 present strain per log time.
Claim 30
Dependent Claim
116 words
A polyamide molded composition comprising: (a) polyamide resin; (b) about 5 to 40 weight percent, based on the total weight of the composition of substantially asbestos free talc in the form of platy fine particles having a surface area of at least about 7 m 2 /g; (c) about 2 to 40 weight percent, based on the total weight of the composition, of wollastonite; and (d) about 5 to 25 weight percent, based on the total weight of the composition, of fiber glass; wherein the ingredients in the composition, are present in proportion to one another such that the composition after molding, has a creep slope of less than about 0.17 present strain per log time.
Claim 31
Dependent Claim
11 words
The molded composition of claim 27 wherein the polyamide is polycaprolactam.
Claim 32
Dependent Claim
21 words
The molded composition of claim 27 wherein the talc is present in an amount of about 10 to 30 weight percent.
Claim 33
Dependent Claim
21 words
The molded composition of claim 27 wherein the talc comprises particles of which at least 80% are of a platy nature.
Claim 34
Dependent Claim
17 words
The molded composition of claim 27 wherein the talc contains less than about 1% Na 2 O.
Claim 35
Dependent Claim
26 words
The molded composition of claim 27 wherein the talc particles have a surface area of about 8 to 11 m 2 /g (N 2 , BET).
Claim 36
Dependent Claim
21 words
The molded composition of claim 27 wherein the wollastonite is present in an amount of about 2 to 20 weight percent.
Claim 37
Dependent Claim
22 words
The molded composition of claim 27 wherein the fiber glass is present in an amount of about 7 to 18 weight percent.
Claim 38
Dependent Claim
23 words
The molded composition of claim 27 including about 0.1 to 4.0 weight percent, based on the weight of wollastonite, of a coupling agent.
Claim 39
Dependent Claim
14 words
The molded composition of claim 35 wherein the coupling agent is a silane compound.
Claim 40
Dependent Claim
32 words
The molded composition of claim 36 wherein the silane compound is gamma aminopropyltriethoxysilane and is present in an amount of about 0.25 to 2 weight percent, based on the weight of wollastonite.
Claim 41
Dependent Claim
51 words
The molded composition of claim 27 wherein the polyamide is polycaprolactam and containing about 10 to 30 weight percent talc, about 2 to 20 weight wollastonite and about 7 to 17 percent fiber glass, and 0.1 to 4.0 weight percent, based on the weight of wollastonite, of a silane coupling agent.
Claim 42
Dependent Claim
15 words
The molded composition of claim 27 wherein the creep slope is less than about 0.15.
Claim 43
Dependent Claim
15 words
The molded composition of claim 39 wherein said molded composition is an automotive headlight retainer.
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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |