GB792955A - Polyamide powder compositions and method for the production thereof - Google Patents
Polyamide powder compositions and method for the production thereofInfo
- Publication number
- GB792955A GB792955A GB3208156A GB3208156A GB792955A GB 792955 A GB792955 A GB 792955A GB 3208156 A GB3208156 A GB 3208156A GB 3208156 A GB3208156 A GB 3208156A GB 792955 A GB792955 A GB 792955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- prepared
- per cent
- sebacamide
- polyamides
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
- C08L77/08—Polyamides derived from polyamines and polycarboxylic acids from polyamines and polymerised unsaturated fatty acids
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A moulding powder, suitable, e.g., for the cold pressing and sintering process claimed in Specification 792,954, comprises two polyamides of different melting-points, the lower melting one being 15-70 per cent by weight of the mixture and at least the higher melting one having average particle dimensions not greater than 40 microns. Up to 85 per cent of the total volume of the powder may be finely-divided inert filler, e.g. diamond dust, silica, carborundum, chalk, alundum, tungsten carbide, copper, lead, iron, carbon, graphite, molybdenum disulphide, ceramic materials, e.g. titanium dioxide or titanates, magnetic metals or oxides, or polytetrafluorethylene. Suitable polyamides are polyhexamethylene adipamide or sebacamide and polycaprolactam. The polyamide powders may be prepared by precipitation from solution (as in Specifications 690,936, 691,114 and 740,356). The compositions may be granulated. In an example, polyhexamethylene adipamide powder (M.P. 271 DEG C.) was prepared from clean waste nylon and polyhexamethylene sebacamide (M.P. 224 DEG C.) from virgin material. 70 parts of the first powder were mixed with 20 of the second, tableted, ground and sieved to pass an 80 mesh screen. The composition may be used for sintered articles or for fusion coatings. Specification 763,939 and 763,940 also are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3208156A GB792955A (en) | 1954-07-01 | 1954-07-01 | Polyamide powder compositions and method for the production thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3208156A GB792955A (en) | 1954-07-01 | 1954-07-01 | Polyamide powder compositions and method for the production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
GB792955A true GB792955A (en) | 1958-04-09 |
Family
ID=10332920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3208156A Expired GB792955A (en) | 1954-07-01 | 1954-07-01 | Polyamide powder compositions and method for the production thereof |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB792955A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856625A1 (en) * | 2003-06-27 | 2004-12-31 | Rhodia Engineering Plastics Sa | MANUFACTURE OF ARTICLES BY ROTOMOLDING |
CN110819104A (en) * | 2018-07-23 | 2020-02-21 | 上海杰事杰新材料(集团)股份有限公司 | High-dimensional-precision nylon powder for 3D printing and preparation method and application thereof |
CN110938206A (en) * | 2013-05-01 | 2020-03-31 | 英威达纺织(英国)有限公司 | Reduced gel formation in polyamide manufacturing processes |
-
1954
- 1954-07-01 GB GB3208156A patent/GB792955A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856625A1 (en) * | 2003-06-27 | 2004-12-31 | Rhodia Engineering Plastics Sa | MANUFACTURE OF ARTICLES BY ROTOMOLDING |
WO2005000555A2 (en) * | 2003-06-27 | 2005-01-06 | Rhodia Engineering Plastics S.R.L. | Method of producing articles by means of rotational moulding |
WO2005000555A3 (en) * | 2003-06-27 | 2005-03-10 | Rhodia Eng Plastics Srl | Method of producing articles by means of rotational moulding |
CN110938206A (en) * | 2013-05-01 | 2020-03-31 | 英威达纺织(英国)有限公司 | Reduced gel formation in polyamide manufacturing processes |
CN110938206B (en) * | 2013-05-01 | 2022-11-04 | 英威达纺织(英国)有限公司 | Reduced gel formation in polyamide manufacturing processes |
CN110819104A (en) * | 2018-07-23 | 2020-02-21 | 上海杰事杰新材料(集团)股份有限公司 | High-dimensional-precision nylon powder for 3D printing and preparation method and application thereof |
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