EP0205259A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Microspherical cured phenolic resin particles and process for production thereof
Assignee: Unitika Ltd
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Filing: 1986-05-12
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Granted: —
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Expires: 2006-05-12
Abstract
Abstract @ A process for producing microspherical cured phenolic resin particles having a particle diameter of not more than about 100 µm, which comprises reacting a novolak resin, a phenol and an aldehyde in an aqueous medium in the presence of a basic catalyst and an emulsion stabilizer. Novel microspherical cured phenolic resin particles are produced by this process. The resin particles have excellent impact strength and mechanical properties, a sharp particle size distribution, and a low secondary agglomerate content, and because of these properties, are useful as an excellent modifier or filler for various plastics and rubbers.
Inventors
- 👤 Keiichi Asami
- 👤 Mutsunori Yamao
- 👤 Tadashi Ishikura
- 👤 Yoshiaki Echigo
- 👤 Yoshiyuki Suematu
- 👤 Ritsuko Shidei
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; C08G; C08G8/00; C08G8/04; C08G8/08; C08L; C08L61/00; C08L61/04; C08L61/06; C08J2361/00; C08J2361/04; C08J2361/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
46 words
A process for producing microspherical cured phenolic resin particles having a particle diameter of not more than about 100 µm, which comprises reacting a novolak resin, a phenol, and an aldehyde in an aqueous medium in the presence of a basic catalyst and an emulsion stabilizer.
Claim 2
Dependent Claim
46 words
A process for producing microspherical cured phenolic resin particles having a particle diameter of not more than about 100 µm, which comprises reacting a novolak resin, a phenol, and an aldehyde in an aqueous medium in the presence of a basic catalyst and an emulsion stabilizer.
Claim 3
Dependent Claim
24 words
A process as in claim 1, wherein the novolak resin is a novolak resin having a melting point of not more than about 90°C.
Claim 4
Dependent Claim
32 words
A process as in claim 1, wherein the amount of the phenol used is from about 40 to about 250 parts by weight per 100 parts by weight of the novolak resin.
Claim 5
Dependent Claim
23 words
A process as in claim 1, wherein the molar ratio of the aldehyde to the phenol is from about 1/1 to about 2/1.
Claim 6
Dependent Claim
24 words
A process as in claim 1, wherein the molar ratio of the basic catalyst to the phenol is from about 0.01/1 to about 0.5/1.
Claim 7
Dependent Claim
38 words
A process as in claim 1, wherein the emulsion stabilizer is a substantially water-insoluble inorganic salt present in an amount of from about 0.2 to about 10 parts by weight per 100 parts by weight of the phenol.
Claim 8
Dependent Claim
26 words
A process as in claim 1, wherein the substantially water-soluble inorganic salt is selected from the group consisting of calcium fluoride, magnesium fluoride, and strontium fluoride.
Claim 9
Dependent Claim
37 words
A process as in claim 1, wherein the emulsion stabilizer is a protective organic colloid present in an amount of from about 0.01 to about 10 parts by weight per 100 parts by weight of the phenol.
Claim 10
Dependent Claim
33 words
A process as in claim 1, wherein the reaction temperature is in the range of from about 75 to about 98°C and the reaction time is from about 120 to about 240 minutes.
Claim 11
Dependent Claim
45 words
Microspherical cured phenolic resin particles having a particle diameter of not more than about 100 µm, said particles being obtained by reacting a novolak resin, a phenol, and an aldehyde in an aqueous medium in the presence of a basic catalyst and an emulsion stabilizer.
Claim 12
Dependent Claim
45 words
Microspherical cured phenolic resin particles having a particle diameter of not more than about 100 µm, said particles being obtained by reacting a novolak resin, a phenol, and an aldehyde in an aqueous medium in the presence of a basic catalyst and an emulsion stabilizer.
Claim 13
Dependent Claim
27 words
Microspherical cured phenolic resin particles as in claim 10, wherein the novolak resin is a novolak resin having a melting point of not more than about 90°C.
Claim 14
Dependent Claim
35 words
Microspherical cured phenolic resin particles as in claim 10, wherein the amount of the phenol used is from about 40 to about 250 parts by weight per 100 parts by weight of the novolak resin.
Claim 15
Dependent Claim
26 words
Microspherical cured phenolic resin particles as in claim 10, wherein the molar ratio of the aldehyde to the phenol is from about 1/1 to about 2/1.
Claim 16
Dependent Claim
27 words
Microspherical cured phenolic resin particles as in claim 10, wherein the molar ratio of the basic catalyst to the phenol is from about 0.01/1 to about 0.5/1.
Claim 17
Dependent Claim
41 words
Microspherical cured phenolic resin particles as in claim 10, wherein the emulsion stabilizer is a substantially water-insoluble inorganic salt present in an amount of from about 0.2 to about 10 parts by weight per 100 parts by weight of the phenol.
Claim 18
Dependent Claim
40 words
Microspherical cured phenolic resin particles as in claim 10, wherein the emulsion stabilizer is a protective organic colloid present in an amount of from about 0.01 to about 10 parts by weight per 100 parts by weight of the phenol.
References Cited (Backward Citations)
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