US4528307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation hardenable primer
Assignee: Bayer AG
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Filing: 1983-09-15
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Granted: 1985-07-09
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Expires: 2003-09-15
Abstract
Abstract This invention relates to radiation hardenable primers based on prepolymers containing (meth) acryloyl groups and conventional auxiliary agents. The primers are characterized in that they contain organic and/or inorganic fibres having a fibre length distribution curve reaching its maximum in the region of from 50 to 600 μm. These primers are suitable for coating articles which have absorbent surfaces, in particular for the continuous coating of wood-concrete articles such as wood-concrete boards.
Inventors
- 👤 Karl Fuhr
- 👤 Hans-Joachim Freier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:55
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/483; C04B41/60; C04B41/61; C04B41/62; C04B41/63; C08; C08K; C08K7/00; C08K7/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
A radiation-hardenable primer comprising at least one prepolymer containing acryloyl groups, methacryloyl groups or both, and organic or inorganic fibers having a fiber length distribution curve with its maximum in the region of 50 to 600 μm.
Claim 2
Dependent Claim
37 words
A radiation-hardenable primer comprising at least one prepolymer containing acryloyl groups, methacryloyl groups or both, and organic or inorganic fibers having a fiber length distribution curve with its maximum in the region of 50 to 600 μm.
Claim 3
Dependent Claim
33 words
A radiation-hardenable primer according to claim 1 wherein the at least one prepolymer is a polyester acrylate, a polyester methacrylate, a polyepoxy acrylate, a polyepoxy methacrylate, a polyurethane acrylate or a polyurethane methacrylate.
Claim 4
Dependent Claim
37 words
A radiation-hardenable primer according to claim 1, which contains from 20 to 80% by weight of at least one prepolymer containing acryloyl, methacryloyl groups or both and from 80 to 20% by weight of reactive radiation-hardenable monomers.
Claim 5
Dependent Claim
26 words
A radiation-hardenable primer according to claim 1, which contains from 10 to 30% by weight, based on the radiation hardenable constituents, of organic or inorganic fibres.
Claim 6
Dependent Claim
13 words
A radiation-hardenable primer according to claim 1, wherein the fibres are glass fibres.
Claim 7
Dependent Claim
37 words
A radiation-hardenable primer comprising at least one prepolymer comprising a polyurethane acrylate or polyurethane methacrylate and organic or inorganic fibers having a fiber length distribution curve with its maximum in the region of 50 to 600 μm.
Claim 8
Dependent Claim
37 words
A radiation-hardenable primer comprising at least one prepolymer comprising a polyurethane acrylate or polyurethane methacrylate and organic or inorganic fibers having a fiber length distribution curve with its maximum in the region of 50 to 600 μm.
Claim 9
Dependent Claim
27 words
A radiation-hardenable primer according to claim 6 wherein the prepolymer is a polyurethane acrylate which is the reaction product of isophorone diisocyanate, thiodiglycol, 2-hydroxyethylacrylate and ethoxylated trimethylol-propane.
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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) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |