GB2107327A - Moulding and core sand compositions - Google Patents
Moulding and core sand compositions Download PDFInfo
- Publication number
- GB2107327A GB2107327A GB08129883A GB8129883A GB2107327A GB 2107327 A GB2107327 A GB 2107327A GB 08129883 A GB08129883 A GB 08129883A GB 8129883 A GB8129883 A GB 8129883A GB 2107327 A GB2107327 A GB 2107327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- weight
- composition according
- sulfate
- moulding
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 31
- 239000004576 sand Substances 0.000 title claims abstract description 17
- 238000000465 moulding Methods 0.000 title claims abstract description 14
- 239000004848 polyfunctional curative Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000002148 esters Chemical class 0.000 claims abstract description 5
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 9
- UDHMTPILEWBIQI-UHFFFAOYSA-N butyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(=O)OCCCC)=CC=CC2=C1 UDHMTPILEWBIQI-UHFFFAOYSA-N 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 239000006004 Quartz sand Substances 0.000 claims description 6
- ILHIHKRJJMKBEE-UHFFFAOYSA-N hydroperoxyethane Chemical class CCOO ILHIHKRJJMKBEE-UHFFFAOYSA-N 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- ACIAHEMYLLBZOI-ZZXKWVIFSA-N Unsaturated alcohol Chemical compound CC\C(CO)=C/C ACIAHEMYLLBZOI-ZZXKWVIFSA-N 0.000 claims description 2
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 claims description 2
- 150000008051 alkyl sulfates Chemical class 0.000 claims description 2
- -1 alkyl sulphate Chemical compound 0.000 claims description 2
- 229910021653 sulphate ion Inorganic materials 0.000 claims 3
- 150000004996 alkyl benzenes Chemical class 0.000 claims 1
- 230000035699 permeability Effects 0.000 description 6
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical class CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 description 5
- 239000003599 detergent Substances 0.000 description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 101100205030 Caenorhabditis elegans hars-1 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- ASEFUFIKYOCPIJ-UHFFFAOYSA-M sodium;2-dodecoxyethyl sulfate Chemical compound [Na+].CCCCCCCCCCCCOCCOS([O-])(=O)=O ASEFUFIKYOCPIJ-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
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
- B22C1/18—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 inorganic agents
- B22C1/186—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 inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The moulding and core sand compositions of the invention comprise in addition to sand and sodium silicate and normally enough water to make the composition liquid, also a liquid organic hardener ester of acetic acid and a polyalcohol and a mixture of surface active frothing agents.
Description
SPECIFICATION
Moulding and core sand compositions
The present invention provides moulding and core sand compositions containing a binder in a form of sodium silicate and an organic hardener in a form of an ester of an organic acid and a polyalcohol.
Currently used moulding and core sands containing a binder in the form of sodium silicate are hardened with powdered materials whose basic component is calcium gamma-ortho-silicate. A liquid consistency for such compositions is attained by an addition of surface-active agents, usually anionic.
One of the basic drawbacks of the currently used sands is their unsatisfactory knock-out properties, which requires an additional application of loosening materials which are not always effective and which complicate the technological process. Apart from impeded knock-out properties, which requires labour-consuming procedures at dressing of castings, during the application of loose hardeners according to the hitherto applied technology, quick dusting at moulding stands occurs, which is a hazard to the servicing personnel's health. In order to limit or eliminate the aforesaid drawbacks caused by loose hardeners, it has been proposed to apply liquid hardeners. However, because of the water-repellent properties of organic hardeners, under the effect thereof, a decay of the frothing power occurs in the frothers hitherto applied for obtaining of the liquidity of moulding sands.
For example, a moulding sand containing sodium butylnaphthalenesulfonate as a frother and a liquid hardener in a form of a glycol diacetate does not show liquidity (castability) because the hydrophobic polyalcohol acetate causes supression of froth. Therefore, organic hardeners of the type of esters of acetic acid and polyalcohols have so far found an application only for loose moulding and core sands (see Polish Patent application No. P-i 94640). Although in the tests carried out on the application of surface-active agents such as sodium dodecylbenzenesulfonate or non-ionic surface-active agents of an increased frothing power and a high froth stability in the medium of sodium sodium silicate with an addition of organic hardeners of the type of acetates of glycols, sands of good liquidity and strength were obtained, such sands had a very low permeability after hardening.
It has now been found that only the application of a multi-component mixture of surface-active agents containing at the same time a frothing agent characterized by quick extinguishing of froth of the type of sodium butylnaphthalenesulfonate and a frothing agent of an increased frothing power, ensures obtaining of sands of a long life, very good liquidity, high strength, and very good permeability. In these cases the problem of the selection of a mixture of detergents becomes of a particular importance.
The moulding and core sand composition of the invention, comprises quartz sand, sodium silicate, a liquid hardener ester of acetic acid and a polyalcohoi in an amount of 0.1-2 parts by weight and a mixture of surface-active frothing agents, such as sodium butylnaphthalenesulfonate preferably
in an amount of 0.2-1.0 parts by weight, with an addition of strongly frothing detergents in an amount 0.1-1.0 parts by weight, preferably as alkyl sulfate, alkylaryl sulfonate, ethoxyalkyl sulfate, sulfate of an unsaturated alcohol, sulfate of an unsaturated ethoxy-alcohol, sulfate of an ethoxylated alkylphenol, or a non-ionic surface-active agent. Such compositions contain also when used, enough water to make them liquid.
The liquid moulding sand according to the invention contains as additional detergents a mixture of sulfonates, alkyl- and ethoxy-alkyl sulfates, sulfates of unsaturated alcohols and of unsaturated ethoxy-alcohols, and non-ionic surface-active agents.
In the compositions of the invention the liquid organic hardeners advantageously shorten the time of binding, and the selection of detergent mixtures improves the properties and castability of
moulding and core sands so as to render them useful for the production of casting moulds and cores.
Examples of liquid moulding and core sands of the invention and the properties are as follows:
Example 1
composition of the sand:
quartz sand 100 parts by weight
sodium silicate (water glass) 5 parts by weight
water 2 parts by weight
ethylene glycol diacetate 0.5 parts by weight
frothing agents:
sodium butylnaphthalenesulfonate 0.5 parts by weight
sodium lauryl sulfate 0.4 parts by weight
properties of the sand:
castability 20 cm
life 5 minutes
binding time 30 minutes
compressive strength 10-8MPa after 1 hr 5
permeability lO-Bm4/Nm after 24 hrs 17
after 1 hr 600
Example II
composition of the sand:
quartz sand 100 parts by weight
sodium silicate 5 parts by weight
water 2 parts by weight
ethylene glycol diacetate 0.5 parts by weight
frothing agents::
sodium butylnaphthalenesulfonate 0.5 parts by weight
sodium lauryl-ethoxy-sulfate 0.2 parts by weight
sodium lauryl sulfate 0.2 parts by weight
properties of the sand:
castability 20 cm
life 7 minutes
binding time 35 minutes
compressive strength 10-1 MPa after 1 hr 6
after 24 hrs 18
permeability 10-8m4/Ns after 1 hr 540
after 24 hrs 750
Example Ill
composition of the sand:
quartz sand 100 parts by weight
sodium silicate 5 parts by weight
water 2 parts by weight
ethylene glycol diacetate 0.5 parts by weight
frothing agents:
sodium butylnaphthalenesulfonate 0.5 parts by weight
sulfates of ethoxylated alkylphenols 0.2 parts by weight
properties of the sand::
castability 18 cm
life 6 min
binding time 35 min
compressive strength 10-1MPa after 1 hr 6
permeability 1 O-8m4/Nm after 24 hrs 1 8 Example IV
composition of the sand:
quartz sand 100 parts by weight
sodium silicate 5 parts by weight
water 2 parts by weight
ethylene glycol diacetate 0.5 parts by weight
frothing agents:
sodium butylnaphthalenesulfonate 0.5 parts by weight
ethoxylated alkylphenols 0.1 parts by weight
sodium alkylbenzenesulfonate 0.1 parts by weight
sodium alkylsulfate 0.2 parts by weight
properties of the sand: :
castability 20 cm
life 5 min
binding time 30 min
compressive strength 10-1MPa after 1 hr 4
after 24 hrs 16
permeability 1 O-8m4/Ns 300 after 1 hr
650 after 24 hrs
Replacement of loose inorganic hardeners by organic hardeners improves considerably the knock-out properties after firing. For instance, the work of knocking-out fired liquid self-hardening sands with an inorganic hardener is from 22 to 28 J, whereas in case of liquid sands with an organic hardener it is reduced to 4 to 14 J.
Claims (9)
1. A moulding and core sand composition comprising quartz sand, sodium silicate, a liquid organic hardener ester of acetic acid and a polyalcohol in an amount of 0.1-2 parts by weight and a mixture of surface active frothing agents.
2. A composition according to claim 1 comprising sodium butyinaphthalenesulfonate.
3. A composition according to claim 2 in which the proportion of sodium butylnaphthalenesulfonate is 0.2-1.0 parts by weight.
4. A composition according to any of claims 1 to 3 in which each frothing agent is present in an amount of 0.1-1.0 parts by weight.
5. A composition according to any of claims 1 to 4 comprising a mixture of frothing agents each of which is an alkyl sulfate, an alkylaryl sulfonate, an ethoxy-alkyl sulfate, a sulfate of an unsaturated alcohol, a sulfate of an unsaturated ethoxyalcohol, a sulfate of an ethoxylated alkylphenol, or a nonionic surface active agent are applied.
6. A composition according to claim 1 in which the frothing agents comprise a mixture of sodium butylnaphthalenesulfonate and one or more of an alkyl sulphate, an ethoxyalkyl sulphate, an ethoxylated alkylphenol sulphate, or an alkyl benzene sulphonate.
7. A composition according to claim 1 containing sufficient water to render it liquid.
8. A composition according to claim 1 substantially as described in any one of the foregoing
Examples.
9. Moulds and cores produced from a composition as claimed in any of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08129883A GB2107327B (en) | 1981-10-02 | 1981-10-02 | Moulding and core sand compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08129883A GB2107327B (en) | 1981-10-02 | 1981-10-02 | Moulding and core sand compositions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2107327A true GB2107327A (en) | 1983-04-27 |
| GB2107327B GB2107327B (en) | 1985-05-30 |
Family
ID=10524928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08129883A Expired GB2107327B (en) | 1981-10-02 | 1981-10-02 | Moulding and core sand compositions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2107327B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154593A (en) * | 1984-02-22 | 1985-09-11 | Foseco Int | Foundry sand compositions |
| EP0202004A2 (en) * | 1985-04-20 | 1986-11-20 | Foseco International Limited | Pouring tubes |
| EP0813506A1 (en) * | 1995-03-06 | 1997-12-29 | W.R. Grace & Co.-Conn. | Cement composition |
| CN105057566A (en) * | 2015-07-28 | 2015-11-18 | 宁夏共享化工有限公司 | Novel liquid curing agent used for 3D sand mold printing inorganic binder and preparation method of novel liquid curing agent |
| EP3981525A4 (en) * | 2019-06-07 | 2022-07-20 | NOF Corporation | Surfactant composition for foaming sand |
-
1981
- 1981-10-02 GB GB08129883A patent/GB2107327B/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154593A (en) * | 1984-02-22 | 1985-09-11 | Foseco Int | Foundry sand compositions |
| EP0202004A2 (en) * | 1985-04-20 | 1986-11-20 | Foseco International Limited | Pouring tubes |
| EP0202004A3 (en) * | 1985-04-20 | 1988-01-27 | Foseco International Limited | Pouring tubes |
| EP0813506A1 (en) * | 1995-03-06 | 1997-12-29 | W.R. Grace & Co.-Conn. | Cement composition |
| EP0813506A4 (en) * | 1995-03-06 | 1999-01-27 | Grace W R & Co | Cement composition |
| CN105057566A (en) * | 2015-07-28 | 2015-11-18 | 宁夏共享化工有限公司 | Novel liquid curing agent used for 3D sand mold printing inorganic binder and preparation method of novel liquid curing agent |
| CN105057566B (en) * | 2015-07-28 | 2017-05-17 | 宁夏共享化工有限公司 | Novel liquid curing agent used for 3D sand mold printing inorganic binder and preparation method of novel liquid curing agent |
| EP3981525A4 (en) * | 2019-06-07 | 2022-07-20 | NOF Corporation | Surfactant composition for foaming sand |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2107327B (en) | 1985-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |