US3894134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making reinforced polyester sheets
Assignee: Beazer East Inc
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Filing: 1973-01-02
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Granted: 1975-07-08
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Expires: 1993-01-02
Abstract
Abstract A low shrink, chemically thickened, fibrous reinforced, cureable polyester resin mat is prepared by first formulating and then combining two viscosity stable portions of the ingredients, one portion containing an unsaturated polyester and part of the crosslinking agent therefor, and water, and the other portion containing the remainder of the crosslinking agent, calcium oxide (chemical thickening agent) and a thermoplastic polymer having anhydride groups.
Inventors
- 👤 David R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:37
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
166 words
A METHOD FOR PREPARING A POLYMERIZABLE POLYESTER RESIN MAT FROM A POLYESTER RESIN FORMULATION BY MIXING DIFFERENT PORTIONS OF THE FORMULATION COMPRISING: A. PROVIDING A PORTION OF THE FORMULATION, THE PORTION COMPRISING AN UNSATURATED POLYESTER, AN ETHYLENICALLY UNSATURATED MONOMERIC CROSS-LINKING AGENT CAPABLE OF POLYMERIZING WITH SAID POLYESTER, AND WATER, SAID PORTION BEING SUBSTANTIALLY STABLE IN VISCOSITY: B. PROVIDING ANOTHER PORTION OF THE FORMULATION, SAID ANOTHER PORTION COMPRISING AN ETHYLENICALLY UNSATURATED MONOMERIC CROSS-LINKING AGENT CAPABLE OF POLYMERIZING WITH SAID POLYESTER, THICKENING AGENT AND A THERMOPLASTIC POLYMER CONTAINING ANHYDRIDE GROUPS, SAID ANOTHER PROTION BEING FREE OF WATER IN AMOUNTS WHICH CAUSE SAID THERMOPLASTIC POLYMER AND SAID THICKENING AGENT TO COACT WITH EACH OTHER THEREBY RENDERING SAID OTHER PORTION SUBSTANTIALLY STABLE IN VISCOSITY: C. PREPARING SAID FORMULATION BY SEPARATELY MIXING EACH OF SAID PORTIONS TO THOROUGHLY DISTRUBUTE THE INGREDIENTS THEREOF THROUGHOUT EACH PORTION, AND THEN MIXING SAID PROTIONS TOGETHER: AND D. PROMPTLY AFTER MIXING SAID PORTIONS TOGETHER FORMING AN UNCURED SHEET OF SAID FORMULTION AND APPLYING THERETO FIBROUS REINFORCEMENTS:
Claim 2
Independent Claim
166 words
A METHOD FOR PREPARING A POLYMERIZABLE POLYESTER RESIN MAT FROM A POLYESTER RESIN FORMULATION BY MIXING DIFFERENT PORTIONS OF THE FORMULATION COMPRISING: A. PROVIDING A PORTION OF THE FORMULATION, THE PORTION COMPRISING AN UNSATURATED POLYESTER, AN ETHYLENICALLY UNSATURATED MONOMERIC CROSS-LINKING AGENT CAPABLE OF POLYMERIZING WITH SAID POLYESTER, AND WATER, SAID PORTION BEING SUBSTANTIALLY STABLE IN VISCOSITY: B. PROVIDING ANOTHER PORTION OF THE FORMULATION, SAID ANOTHER PORTION COMPRISING AN ETHYLENICALLY UNSATURATED MONOMERIC CROSS-LINKING AGENT CAPABLE OF POLYMERIZING WITH SAID POLYESTER, THICKENING AGENT AND A THERMOPLASTIC POLYMER CONTAINING ANHYDRIDE GROUPS, SAID ANOTHER PROTION BEING FREE OF WATER IN AMOUNTS WHICH CAUSE SAID THERMOPLASTIC POLYMER AND SAID THICKENING AGENT TO COACT WITH EACH OTHER THEREBY RENDERING SAID OTHER PORTION SUBSTANTIALLY STABLE IN VISCOSITY: C. PREPARING SAID FORMULATION BY SEPARATELY MIXING EACH OF SAID PORTIONS TO THOROUGHLY DISTRUBUTE THE INGREDIENTS THEREOF THROUGHOUT EACH PORTION, AND THEN MIXING SAID PROTIONS TOGETHER: AND D. PROMPTLY AFTER MIXING SAID PORTIONS TOGETHER FORMING AN UNCURED SHEET OF SAID FORMULTION AND APPLYING THERETO FIBROUS REINFORCEMENTS:
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein said thickening agent is calcium oxide only.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said thermoplastic polymer is styrene-maleic anhydride copolymer.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein the viscosities of each of said portions is approximately equal.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein said formulation is prepared by intermixing each of said portions in an approximately equal volumetric ratio.
Claim 7
Dependent Claim
35 words
A method according to claim 1 wherein the viscosities of each of said portions is approximately equal and wherein said formulation is prepared by intermixing each of said portions in an approximately equal volumetric ratio.
Claim 8
Dependent Claim
22 words
A method according to claim 6 wherein said thickening agent is calcium oxide only and wherein said thermoplastic is styrene-maleic anhydride copolymer.
Claim 9
Dependent Claim
71 words
A method according to claim 1 wherein the viscosity of each of portions (A) and (B) is about 10,000 to about 150,000 cp, wherein the viscosity of said formulation at the time said fibrous reinforcements are applied thereto is not in excess of about 150,000 cp and wherein the fibrous reinforced formulation has a viscosity of about 100,000 to about 1,000,000 within about 10 to about 30 minutes after preparation thereof.
Claim 10
Dependent Claim
22 words
A method according to claim 8 wherein said thickening agent is calcium oxide only and said thermoplastic polymer is styrene-maleic anhydride copolymer.
References Cited (Backward Citations)
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US2843556A
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US3466259A
Cited
US3551378A
Cited
US3665055A
Cited
US3637911A
Cited
US3686111A
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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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |