US4640971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microspherical particles of resole resins and process for producing the same
Assignee: Unitika Ltd
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Filing: 1985-07-17
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Granted: 1987-02-03
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Expires: 2005-07-17
Abstract
Abstract A resole resin in the form of microspherical particles whose surfaces are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt and which are not larger than 500 μm in size, and a process for producing such resole resin. The resole resin comprises solid particles that are highly heat reactive and can be stored in a stable manner for a prolonged period. The resin particles can be used with good results in all fields of applications (e.g., moldings, laminations and binders) where conventional phenolic resins are used.
Inventors
- 👤 Yoshiaki Echigo
- 👤 Mutsunori Yamao
- 👤 Yoshiyuki Suematu
- 👤 Tadashi Ishikura
- 👤 Keiichi Asami
- 👤 Ritsuko Shidei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:02
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J3/14; C08K; C08K3/00; C08K3/16; C08J2361/00; C08J2361/04; C08J2361/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A resole resin in the form of microspherical particles where the surfaces of the particles are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt having a solubility in water not greater than about 0.2 g/1,000 ml at 25° C. and where the particles have a particle size not larger than about 500 μm.
Claim 2
Dependent Claim
58 words
A resole resin in the form of microspherical particles where the surfaces of the particles are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt having a solubility in water not greater than about 0.2 g/1,000 ml at 25° C. and where the particles have a particle size not larger than about 500 μm.
Claim 3
Dependent Claim
32 words
A resole resin according to claim 1, wherein said substantially water-insoluble inorganic salt is at least one inorganic salt selected from the group consisting of calcium fluoride, magnesium fluoride and strontium fluoride.
Claim 4
Dependent Claim
62 words
A resole resin in the form of microspherical particles where the surfaces of the particles are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt having a solubility in water not greater than about 0.2 g/1,000 ml at 25° C. and a flame retardant and where the particles have a particle size not larger than about 500 μm.
Claim 5
Dependent Claim
62 words
A resole resin in the form of microspherical particles where the surfaces of the particles are partly or entirely covered with a coating of a substantially water-insoluble inorganic salt having a solubility in water not greater than about 0.2 g/1,000 ml at 25° C. and a flame retardant and where the particles have a particle size not larger than about 500 μm.
Claim 6
Dependent Claim
40 words
A resole resin according to claim 3, wherein said substantially water-insoluble inorganic salt is at least one inorganic salt selected from the group consisting of calcium fluoride, magnesium fluoride and strontium fluoride, and wherein the flame retardant is red phosphorus.
References Cited (Backward Citations)
US4454298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |