GB541414A - Improvements in or relating to the production of resinous moulding compositions and moulded products - Google Patents
Improvements in or relating to the production of resinous moulding compositions and moulded productsInfo
- Publication number
- GB541414A GB541414A GB907340A GB907340A GB541414A GB 541414 A GB541414 A GB 541414A GB 907340 A GB907340 A GB 907340A GB 907340 A GB907340 A GB 907340A GB 541414 A GB541414 A GB 541414A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resin
- sawdust
- composition
- per cent
- volatile solvent
- 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
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
541,414. Synthetic resin compositions moulding. CELLOMOLD., Ltd., DAVIES, D. N., and READ, L. M. May 22, 1940, No. 9073. [Class 2 (iii)] [Also in Group V] A composition of matter comprises a mass of loose substantially dry particles, so that the mass can be conveniently handed and distributed in a mould, and consists mainly of an intimate mixture of a heat hardenable phenolicaldehyde resin with wood sawdust in proportions within the limits 5 to 25 per cent. by weight of resin and 65 to 90 per cent. sawdust, the resin and sawdust amounting to at least 90 per cent. in the absence of any appreciable quantity of water or any more highly volatile substances other than such as may comprise a natural part of the resin or sawdust, the sawdust being in normal substantially non-pulverized condition and having a water content below 35 per cent. The resin may be obtained by condensing cresol, resorcinol or other phenol with formaldehyde or other aldehyde, and may be a solid resol or a novolak; if a novolak is used, hexamethylene tetramine or other appropriate hardening agent is incorporated in the composition ; fillers, lubricants, plasticizers, colouring matter, and oxides of alkaline earth metals, e.g. magnesia or lime, may be incorporated in the composition. The resin, either dry or in solution in a volatile solvent, is compounded with the other ingredients in a mixing machine which kneads but does not disintegrate the sawdust particles. In examples, a cresol-formaldehyde resol, sawdust, magnesia and a lubricant, e.g. olein, are mixed either in a heated Banbury mixer or in a cold ball mill, or a solution of the resol in a volatile solvent, e.g. methylated spirit, is mixed with the other ingredients either in a hot jacketed blade mixer, so that the volatile solvent is removed during mixing, or in a cold blade mixer of the Baker Perkins type, the mixture being then poured into a container and dried in an oven to remove the volatile solvent. The compositions have low flow properties, and can be moulded into sheets, blocks or similar articles of simple shapes in heated platen presses under a pressure of less than 600 lbs. sq. inch the product being removable from the mould whilst hot without blistering. A press comprising platens 3, 4, 5 connected by slotted links 6 may be employed, the composition being placed in a framework 8 of highly compressible material, e.g. strips of fibrous board having a base of sugar cane fibre, the strips being pinned together if desired. The composition and the framework are then compressed by applying a pressure of say 300 lbs. sq. inch hydraulically to the bottom platen 5, heat being applied simultaneously to cure the resin. Specifications 321,697, 336,754, [both in Class 2 (iii)], and 467,491 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB907340A GB541414A (en) | 1940-05-22 | 1940-05-22 | Improvements in or relating to the production of resinous moulding compositions and moulded products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB907340A GB541414A (en) | 1940-05-22 | 1940-05-22 | Improvements in or relating to the production of resinous moulding compositions and moulded products |
Publications (1)
Publication Number | Publication Date |
---|---|
GB541414A true GB541414A (en) | 1941-11-26 |
Family
ID=9864845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB907340A Expired GB541414A (en) | 1940-05-22 | 1940-05-22 | Improvements in or relating to the production of resinous moulding compositions and moulded products |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB541414A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385524A1 (en) * | 1977-04-01 | 1978-10-27 | Facelfrance | Variable density filler for moulding resin - comprises wood powder and pref. quicklime powder |
-
1940
- 1940-05-22 GB GB907340A patent/GB541414A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385524A1 (en) * | 1977-04-01 | 1978-10-27 | Facelfrance | Variable density filler for moulding resin - comprises wood powder and pref. quicklime powder |
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