US4529757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resin patching compound
Assignee: ThyssenKrupp Budd Co
•
Filing: 1983-09-09
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Granted: 1985-07-16
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Expires: 2003-09-09
Abstract
Abstract A method for repairing plastics, metal and the like. The method uses a compound comprising a thermosetting unsaturated polyester resin, a thermoplastic resin mixed with said polyester, particulate inorganic filler, as well as additional metallic particulate material, fibrous materials and a catalyst. The compound when cured at a relatively elevated temperature of about 325°-350° F. provides a low shrink material which can be painted and baked on normal processing lines up to 350° F. without separating from the underlying substrate.
Inventors
- 👤 Kenneth A. Iseler
- 👤 Joseph D. Connolly
- 👤 Mayur S. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:25
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/12; C08; C08L; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S524/00; Y10S524/919
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A patching composition for repairing a precise surface of plastic or metal parts containing a surface imperfection whereby such parts may be subjected to an additional processing, said composition comprising: (a) a patching composition including about 20 to 40 weight percent of a thermosetting resin, said thermosetting resin having the hydroxyl-carboxyl ratio of about 5.7 to 0.8, an acid number of at least 14, a hydroxyl number of 14 to 120, and a molecular weight of about 900 to 3500; (b) about 10 to 30 weight percent of a low shrink additive thermoplastic polymer; (c) about 5 to 25 percent by weight of a fiberous reinforcing material; (d) about 10 to 400 percent by weight of inert organic particles; (e) about 5 to 15 percent by weight of metallic particles; (f) about 0.5 to 5 percent by weight of a free radical polymerization catalyst; and (g) about 0.25 to 5 percent by weight of a catalyst promoter.
Claim 2
Dependent Claim
157 words
A patching composition for repairing a precise surface of plastic or metal parts containing a surface imperfection whereby such parts may be subjected to an additional processing, said composition comprising: (a) a patching composition including about 20 to 40 weight percent of a thermosetting resin, said thermosetting resin having the hydroxyl-carboxyl ratio of about 5.7 to 0.8, an acid number of at least 14, a hydroxyl number of 14 to 120, and a molecular weight of about 900 to 3500; (b) about 10 to 30 weight percent of a low shrink additive thermoplastic polymer; (c) about 5 to 25 percent by weight of a fiberous reinforcing material; (d) about 10 to 400 percent by weight of inert organic particles; (e) about 5 to 15 percent by weight of metallic particles; (f) about 0.5 to 5 percent by weight of a free radical polymerization catalyst; and (g) about 0.25 to 5 percent by weight of a catalyst promoter.
Claim 3
Dependent Claim
14 words
A patching composition of claim 1 wherein said resin has a glycol-maleate thermosetting resin.
Claim 4
Dependent Claim
25 words
The patching composition of claim 1 wherein said resin is a glycol-maleate phthalate thermosetting resin having a ratio of maleate to phthalate of about 3:1.
Claim 5
Dependent Claim
24 words
The patching composition of claim 1 wherein said thermosetting resin is a glycol-maleate phthalate resin having a maleate to phthalate ratio of about 2:1.
Claim 6
Dependent Claim
15 words
The patching composition of claim 1 wherein said thermoplastic is a styrene solution of methylmethacrylate.
Claim 7
Dependent Claim
15 words
The patching composition of claim 1 wherein said thermoplastic is a styrene solution of polyvinylacetate.
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |