US4444921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated calcium carbonate in polyester/rubber molding compound
Assignee: Phillips Petroleum Co
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Filing: 1982-09-24
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Granted: 1984-04-24
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Expires: 2002-09-24
Abstract
Abstract A thermosettable composition suitable for preparing reinforced plastic articles is prepared by combining an unsaturated polyester, a rubber, a vinyl monomer, a catalyst and a calcium carbonate filler coated with a fatty acid or fatty acid metal salt. The resulting compositions when cured exhibits high impact strength.
Inventors
- 👤 Aubrey South, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K9/00; C08K9/04; C08L; C08L67/00; C08L67/06; C08L7/00; C08L9/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
134 words
A composition comprising (a) an unsaturated polyester prepared by reacting an unsaturated dicarboxylic acid and a polyol; (b) a rubber, said rubber being present in an amount so as to give a weight ratio of (a) to (b) within the range of 15:1 to 0.5:1; (c) a vinyl monomer, the total amount of vinyl monomer being within the range of 15 to 300 parts by weight of vinyl monomer per 100 parts by weight of said polyester plus said rubber; (d) a catalyst; and (e) 25 to 800 parts by weight per 100 parts by weight of said polyester plus rubber of calcium carbonate, at least 10 percent of which is coated with 0.1 to 5 weight percent of a fatty acid or fatty acid salt based on the weight of said calcium carbonate.
Claim 2
Dependent Claim
134 words
A composition comprising (a) an unsaturated polyester prepared by reacting an unsaturated dicarboxylic acid and a polyol; (b) a rubber, said rubber being present in an amount so as to give a weight ratio of (a) to (b) within the range of 15:1 to 0.5:1; (c) a vinyl monomer, the total amount of vinyl monomer being within the range of 15 to 300 parts by weight of vinyl monomer per 100 parts by weight of said polyester plus said rubber; (d) a catalyst; and (e) 25 to 800 parts by weight per 100 parts by weight of said polyester plus rubber of calcium carbonate, at least 10 percent of which is coated with 0.1 to 5 weight percent of a fatty acid or fatty acid salt based on the weight of said calcium carbonate.
Claim 3
Dependent Claim
43 words
A composition according to claim 1 wherein said rubber is a normally solid carboxy-containing polymer of a conjugated diene having a weight average molecular weight within the range of 50,000 to 250,000 and an inherent viscosity within the range of 0.6 to 2.
Claim 4
Dependent Claim
16 words
A composition according to claim 1 wherein said rubber is a copolymer of butadiene and styrene.
Claim 5
Dependent Claim
18 words
A composition according to claim 1 wherein said polyester is prepared by reacting fumaric acid and propylene glycol.
Claim 6
Dependent Claim
12 words
A composition according to claim 1 wherein said vinyl monomer is styrene.
Claim 7
Dependent Claim
50 words
A composition according to claim 1 wherein said ratio of (a) to (b) is within the range of 5:1 to 1:1 and wherein said vinyl monomer is present in an amount within the range of 30 to 200 parts by weight per 100 parts by weight of (a) plus (b).
Claim 8
Dependent Claim
12 words
A composition according to claim 1 wherein said catalyst is a peroxide.
Claim 9
Dependent Claim
15 words
A composition according to claim 1 wherein said composition contains in addition a reinforcing agent.
Claim 10
Dependent Claim
13 words
A composition according to claim 8 wherein said reinforcing agent is glass fibers.
Claim 11
Dependent Claim
26 words
A composition according to claim 1 wherein said rubber is a carboxy-containing polymer of a conjugated diene having 55 to 100 percent polymerized conjugated diene units.
Claim 12
Dependent Claim
21 words
A composition according to claim 1 wherein said calcium carbonate is a blend of 15-60 percent coated and 85-40 percent uncoated.
Claim 13
Dependent Claim
14 words
A composition according to claim 1 wherein all of said calcium carbonate is coated.
Claim 14
Dependent Claim
27 words
A composition according to claim 1 wherein said calcium carbonate is coated with a mixture of C 16 and C 18 fatty acids or with calcium stearate.
Claim 15
Dependent Claim
22 words
A composition according to claim 13 wherein said fatty acid mixture or calcium stearate is coated onto said calcium carbonate by milling.
Claim 16
Dependent Claim
245 words
A composition according to claim 14 wherein said unsaturated polyester is produced by reacting fumaric acid and propylene glycol, said rubber is a normally solid carboxy-containing copolymer of butadiene and styrene characterized by a vinyl addition of 5 to 76 percent and having 0.01 to 5 weight percent carboxyl content, said ratio of (a) to (b) being within the range of 5:1 to 1:1, said vinyl monomer is styrene and is present in an amount within the range of 30 to 200 parts by weight per 100 parts by weight of (a) plus (b), said catalyst is tertiary butyl perbenzoate present in an amount within the range of 1 to 5 parts by weight per 100 parts by weight of (a) plus (b), wherein said coated calcium carbonate filler is present in an amount within the range of 100 to 400 parts by weight per 100 parts by weight of (a) plus (b), the coating being present in an amount within the range of 0.25 to 2 weight percent based on the weight of said calcium carbonate, and wherein said composition contains glass fiber reinforcing agent in an amount within the range of 40 to 200 parts by weight per 100 parts by weight of (a) plus (b), 1 to 5 parts by weight of zinc stearate per 100 parts by weight of (a) plus (b), and 1 to 10 parts by weight of magnesium hydroxide per 100 parts by weight of (a) plus (b).
Claim 17
Dependent Claim
23 words
A composition according to claim 15 wherein said calcium carbonate is coated with a mixture of C 16 and C 18 fatty acids.
Claim 18
Dependent Claim
15 words
A composition according to claim 15 wherein said calcium carbonate is coated with calcium stearate.
Claim 19
Dependent Claim
13 words
A cured article produced by subjecting the composition of claim 15 to heat.
Claim 20
Dependent Claim
13 words
A cured article produced by subjecting the composition of claim 1 to heat.
Claim 21
Independent Claim
152 words
A method of forming thermosetting compositions suitable for preparing reinforced plastic articles comprising mixing together under conditions of moderate shear (a) an unsaturated polyester prepared by reacting an unsaturated dicarboxylic acid and a polyol; (b) a rubber, said rubber being present in an amount so as to give a weight ratio of (a) to (b) within the range of 15:1 to 0.5:1; (c) a vinyl monomer, the total amount of vinyl monomer being within the range of 15 to 300 parts by weight of vinyl monomer per 100 parts by weight of said polyester plus said rubber; (d) a catalyst; and (e) 25 to 800 parts by weight per 100 parts by weight of (a) plus (b) of calcium carbonate at least 10 weight percent of which is coated with 0.1 to 5 weight percent of a fatty acid or fatty acid metal salt based on the weight of said calcium carbonate.
Claim 22
Independent Claim
152 words
A method of forming thermosetting compositions suitable for preparing reinforced plastic articles comprising mixing together under conditions of moderate shear (a) an unsaturated polyester prepared by reacting an unsaturated dicarboxylic acid and a polyol; (b) a rubber, said rubber being present in an amount so as to give a weight ratio of (a) to (b) within the range of 15:1 to 0.5:1; (c) a vinyl monomer, the total amount of vinyl monomer being within the range of 15 to 300 parts by weight of vinyl monomer per 100 parts by weight of said polyester plus said rubber; (d) a catalyst; and (e) 25 to 800 parts by weight per 100 parts by weight of (a) plus (b) of calcium carbonate at least 10 weight percent of which is coated with 0.1 to 5 weight percent of a fatty acid or fatty acid metal salt based on the weight of said calcium carbonate.
Claim 23
Dependent Claim
25 words
A method according to claim 20 wherein said fatty acid or fatty acid metal salt is coated onto the calcium carbonate by means of milling.
Claim 24
Dependent Claim
41 words
A method according to claim 20 wherein said fatty acid or fatty acid metal salt is present on said calcium carbonate in an amount within the range of 0.25 to 2 weight percent based on the weight of said calcium carbonate.
Claim 25
Dependent Claim
16 words
A method according to claim 22 wherein said shear produces a temperature rise of 2°-30° C.
Claim 26
Dependent Claim
29 words
A method according to claim 20 wherein the resulting composition is subjected to curing conditions of 100°-200° C. for a time within the range of 1 to 15 minutes.
Claim 27
Dependent Claim
32 words
A method according to claim 20 wherein said rubber is a normally solid carboxy-containing polymer of a conjugated diene having a weight average molecular weight within the range of 30,000 to 400,000.
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |