US4417019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin molding composition containing carboxylic acid-modified polyolefin, glass fibers and calcium-silicate useful for welding
Assignee: Tonen General Sekiyu KK
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Filing: 1982-08-05
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Granted: 1983-11-22
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Expires: 2002-08-05
Abstract
Abstract An improved molding compound comprising a polyolefin modified with an unsaturated carboxylic acid, and has dispersed therein a filler material comprising a mixture of glass fiber and calcium silicate. In one embodiment the molding compound also includes an ethylene- alpha -olefin copolymer rubber.
Inventors
- 👤 Noboru Yamamoto
- 👤 Keiichi Morikubo
- 👤 Masato Komatsu
- 👤 Kazuo Sei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/14; C08K2201/00; C08K2201/016
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A molding composition comprising: (a) at least 50 wt.% of a polymer or copolymer of an alpha-olefin having from 2 to 4 carbon atoms, said polymer or copolymer being modified with an unsaturated carboxylic acid or derivative thereof; (b) between about 1 wt% and about 30 wt% of glass fiber; and (c) between about 5 wt% and about 40 wt% of fibrous calcium silicate; the concentration of said glass fibers and fibrous calcium silicate in the modified polyolefin being sufficient to substantially improve the weld tensile strength of the composition when molded.
Claim 2
Dependent Claim
92 words
A molding composition comprising: (a) at least 50 wt.% of a polymer or copolymer of an alpha-olefin having from 2 to 4 carbon atoms, said polymer or copolymer being modified with an unsaturated carboxylic acid or derivative thereof; (b) between about 1 wt% and about 30 wt% of glass fiber; and (c) between about 5 wt% and about 40 wt% of fibrous calcium silicate; the concentration of said glass fibers and fibrous calcium silicate in the modified polyolefin being sufficient to substantially improve the weld tensile strength of the composition when molded.
Claim 3
Dependent Claim
43 words
The composition as defined in claim 1 wherein the modified polyolefin comprises a mixture of a major weight percent of an unmodified polyolefin and a minor weight percent of a propylene homopolymer or copolymer modified with an unsaturated carboxylic acid or derivative thereof.
Claim 4
Dependent Claim
19 words
The composition defined in claim 1 wherein the polyolefin is ethylene or propylene homopolymer or ethylene or propylene copolymer.
Claim 5
Dependent Claim
44 words
The composition as defined in claim 1 and further comprising an effective amount of an ethylene-α-olefin copolymer rubber to substantially increase the impact resistance of the composition when molded, the ethylene α-olefin copolymer rubber concentration in the composition being between 1 and 40 wt.%.
Claim 6
Dependent Claim
14 words
The composition as defined in claim 1 wherein the polyolefin is an ethylene-propylene copolymer.
Claim 7
Dependent Claim
12 words
The composition as defined in claim 1 wherein the polyolefin is polypropylene.
Claim 8
Dependent Claim
79 words
A molding composition comprising: (a) at least 50 weight percent of a polymer or copolymer of an α-olefin having from 2 to 4 carbon atoms, said polymer being modified with an effective amount of an unsaturated carboxylic acid; (b) a minor weight percent of fibrous filler material which comprises a mixture of glass fibers and fibrous calcium silicate, said glass fibers and fibrous calcium silicate synergistically combining to improve the tensile weld strength property of the composition when molded.
Claim 9
Dependent Claim
79 words
A molding composition comprising: (a) at least 50 weight percent of a polymer or copolymer of an α-olefin having from 2 to 4 carbon atoms, said polymer being modified with an effective amount of an unsaturated carboxylic acid; (b) a minor weight percent of fibrous filler material which comprises a mixture of glass fibers and fibrous calcium silicate, said glass fibers and fibrous calcium silicate synergistically combining to improve the tensile weld strength property of the composition when molded.
Claim 10
Dependent Claim
52 words
The molding composition as defined in claim 7 wherein the modified polymer or copolymer comprises a mixture of an unmodified polymer or copolymer of a C 2 -C 3 α-olefin and a C 2 -C 3 polymer or copolymer of an α-olefin reacted with an effective amount of an unsaturated carboxylic acid.
Claim 11
Dependent Claim
22 words
The molding composition as defined in claim 8 wherein the unmodified polymer or copolymer comprises the major weight proportion of the mixture.
Claim 12
Dependent Claim
20 words
The molding composition of claim 7 wherein the composition further comprises a minor weight percent of an ethylene-α-olefin copolymer rubber.
Claim 13
Dependent Claim
43 words
The molding composition of claim 1 wherein the polyolefin includes a propylene homopolymer and wherein the concentration of the glass fibers and fibrous calcium silicate in the composition is from 5 to 20 weight percent and from 10 to 30 weight percent, respectively.
Claim 14
Dependent Claim
20 words
The molding composition of claim 1 wherein the aspect ratio of the fibrous calcium siicate is from 3 to 30.
Claim 15
Dependent Claim
21 words
The molding composition of claim 4 wherein the copolymer rubber concentration in the composition is between 5 and 20 weight percent.
Claim 16
Dependent Claim
75 words
A molded article of thermoplastic comprising: (a) at least 50 wt.% of a polymer or copolymer of an alpha-olefin having from 2 to 4 carbon atoms, said polymer or copolymer being modified with an effective amount of an unsaturated carboxylic acid; and (b) a minor weight percent of fibrous filler material which comprises a mixture of glass fibers and calcium silicate, said filler materials combining synergistically to improve the tensile weld strength of the article.
Claim 17
Dependent Claim
75 words
A molded article of thermoplastic comprising: (a) at least 50 wt.% of a polymer or copolymer of an alpha-olefin having from 2 to 4 carbon atoms, said polymer or copolymer being modified with an effective amount of an unsaturated carboxylic acid; and (b) a minor weight percent of fibrous filler material which comprises a mixture of glass fibers and calcium silicate, said filler materials combining synergistically to improve the tensile weld strength of the article.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |