FR2411875A1 - Prodn. of pitch foams - by thermal expansion with blowing agent - Google Patents
Prodn. of pitch foams - by thermal expansion with blowing agentInfo
- Publication number
- FR2411875A1 FR2411875A1 FR7737747A FR7737747A FR2411875A1 FR 2411875 A1 FR2411875 A1 FR 2411875A1 FR 7737747 A FR7737747 A FR 7737747A FR 7737747 A FR7737747 A FR 7737747A FR 2411875 A1 FR2411875 A1 FR 2411875A1
- Authority
- FR
- France
- Prior art keywords
- pitch
- foams
- blowing agent
- prodn
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/14—Solidifying, Disintegrating, e.g. granulating
Abstract
Prodn. of pitch foams comprises expanding a pitch in a mould at high temp. in the presence of blowing agent. The process is characterised by the fact that (a) the pitch has a Kraemer-Sarnow softening point (KS) of 70-210 degrees C; (b) the initial pressure is such that the externally applied pressure is greater than the internal pressure normally existing in the pitch at the treatment temp.; and (c) after decompsn. of the blowing agent, the pressure is reduced to expand the pitch. Also claimed are processes for producing carbon and graphite foams from the pitch foams. The process gives pitch foams with satisfactory mechanical strength and porosity without the use of thermosetting resins. Carbon and graphite foams produced from the pitch foams are less expensive and have better mechanical properties than those produced from plastics foams. The pitch foams can also be used as coatings, soil improvers, insulating materials and surfaces for solar energy recovery.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7737747A FR2411875A1 (en) | 1977-12-14 | 1977-12-14 | Prodn. of pitch foams - by thermal expansion with blowing agent |
GB7846396A GB2012303B (en) | 1977-12-14 | 1978-11-28 | Process for preparing pitch foams and products so produced |
US05/967,594 US4276246A (en) | 1977-12-14 | 1978-12-08 | Process for preparing pitch foams and products so produced |
JP15274478A JPS5494572A (en) | 1977-12-14 | 1978-12-12 | Method of making pitch foam and its products |
DE19782853496 DE2853496A1 (en) | 1977-12-14 | 1978-12-12 | PECH-BASED FOAM PRODUCTS, THEIR MANUFACTURING AND USE |
NL7812118A NL7812118A (en) | 1977-12-14 | 1978-12-13 | PROCEDURE FOR PREPARING PEK FOAMS AND PRODUCTS MANUFACTURED THEREFORE. |
BE192324A BE872768A (en) | 1977-12-14 | 1978-12-14 | PROCESS FOR PREPARING BRAIS FOAMS AND PRODUCTS THUS OBTAINED |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7737747A FR2411875A1 (en) | 1977-12-14 | 1977-12-14 | Prodn. of pitch foams - by thermal expansion with blowing agent |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2411875A1 true FR2411875A1 (en) | 1979-07-13 |
FR2411875B1 FR2411875B1 (en) | 1981-07-17 |
Family
ID=9198858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7737747A Granted FR2411875A1 (en) | 1977-12-14 | 1977-12-14 | Prodn. of pitch foams - by thermal expansion with blowing agent |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE872768A (en) |
FR (1) | FR2411875A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2467177A1 (en) * | 1979-10-09 | 1981-04-17 | British Petroleum Co | Active carbon prodn. - using petroleum pitch |
-
1977
- 1977-12-14 FR FR7737747A patent/FR2411875A1/en active Granted
-
1978
- 1978-12-14 BE BE192324A patent/BE872768A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2467177A1 (en) * | 1979-10-09 | 1981-04-17 | British Petroleum Co | Active carbon prodn. - using petroleum pitch |
Also Published As
Publication number | Publication date |
---|---|
BE872768A (en) | 1979-06-14 |
FR2411875B1 (en) | 1981-07-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |