GB835792A - Improvements in or relating to resin coated sand - Google Patents
Improvements in or relating to resin coated sandInfo
- Publication number
- GB835792A GB835792A GB1434257A GB1434257A GB835792A GB 835792 A GB835792 A GB 835792A GB 1434257 A GB1434257 A GB 1434257A GB 1434257 A GB1434257 A GB 1434257A GB 835792 A GB835792 A GB 835792A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sand
- parts
- resin
- novolak resin
- lubricant
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
A resin-coated sand, suitable for making metal-casting moulds, is prepared by mixing sand with a liquid phenol-formaldehyde resin, preferably a resol, adding a mixture of dry ground resins comprising a major proportion of a phenol-formaldehyde novolak resin and a minor proportion of a xylenol-formaldehyde novolak resin and a hardening agent for the resins, preferably hexamethylenetetramine, and mixing the combination to form the coated sand. A lubricant, such as zinc stearate, oleic acid, dibutyl phthalate, and other wax-like or oil-like material or high boiling point esters, may be added to improve the free-flowing of the product and to improve the strength of the moulds. This lubricant may be added to the sand-liquid resin mixture, or may be mixed with the dry resins prior to adding them to the sand, or to the prepared coated sand. A preferred mixture is prepared by mixing 100 parts of sand with 1 part of a liquid resol and 3 parts of a dry ground mixture consisting of 75 parts of a phenol-formaldehyde novolak resin, 25 parts of a xylenol-formaldehyde novolak resin, and 15 parts of hexamethylenetetramine. 0.05 parts of lubricant may also be added.ALSO:A resin-coated sand, suitable for making metal-casting moulds, is prepared by mixing sand with a liquid phenol-formaldehyde resin, preferably a resol, adding a mixture of dry ground resins comprising a major proportion of a phenol-formaldehyde novolak resin and a minor proportion of a xylenolformaldehyde novolak resin, and a hardening agent, preferably hexamethylenetetramine, and mixing the combination to form the coated sand. A lubricant, such as zinc stearate, oleic acid, dibutyl phthalate, and other wax-like or oil-like materials or high-boiling-point esters, may be added to improve the free-flowing of the product and to improve the strength of the mould. The lubricant may be added to the sand-liquid resin mixture, or to the dry resins prior to adding them to the sand, or to the coated sand. A preferred mixture is prepared by mixing 100 parts of sand with 1 part of a liquid resol and 3 parts of a dry ground mixture consisting of 75 parts of a phenol-formaldehyde novolak resin, 25 parts of a xylenolformaldehyde novolak resin, and 15 parts of hexamethylenetetramine. 0.05 part of lubricant may also be added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1434257A GB835792A (en) | 1957-05-06 | 1957-05-06 | Improvements in or relating to resin coated sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1434257A GB835792A (en) | 1957-05-06 | 1957-05-06 | Improvements in or relating to resin coated sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB835792A true GB835792A (en) | 1960-05-25 |
Family
ID=10039460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1434257A Expired GB835792A (en) | 1957-05-06 | 1957-05-06 | Improvements in or relating to resin coated sand |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB835792A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3962491A (en) * | 1972-10-11 | 1976-06-08 | Aisin Chemical Company, Limited | Process for producing resin-coated sand particles for use in shell moles |
| CN101941042A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Easily collapsed coated sand |
| CN103272998A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Low-expansion precoated sand |
| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
-
1957
- 1957-05-06 GB GB1434257A patent/GB835792A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3962491A (en) * | 1972-10-11 | 1976-06-08 | Aisin Chemical Company, Limited | Process for producing resin-coated sand particles for use in shell moles |
| CN101941042A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Easily collapsed coated sand |
| CN101941042B (en) * | 2010-09-03 | 2013-01-09 | 吴江市液铸液压件铸造有限公司 | Easily collapsed coated sand |
| CN103272998A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Low-expansion precoated sand |
| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
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