Chemistry:Goulac
From HandWiki
Goulac, also known as Glutrin, is a core binder developed from wood pulping. It is made from lignin pitch.[1]
The material has a dark colour and is soluble in water.[2]
Goulac water was used to make Gallagher sharp sand.[3] It was trademarked in the 1940s.[1] It prevents a chemical reaction between lead arsenate and lime sulphur.[4]
When used to make mold cores from sand, it results in a very hard surface after baking, however the sand can absorb moisture if the core is not used soon after being prepared.[5] Use of Goulac allows the cores to be baked at a lower temperature compared to other types of binders.[5]
Glutrin was used in road paving in the early 20th century.
See also
- Core (manufacturing)
References
- ↑ 1.0 1.1 "Goulac Trademark - Registration Number 0509784 - Serial Number 71558985 :: Justia Trademarks". http://trademarks.justia.com/715/58/goulac-71558985.html.
- ↑ "Goulac Core Binder". Hill and Griffith. http://www.hillandgriffith.com/goulac-metalcasting-foundry-core-binder. Retrieved 18 February 2019.
- ↑ "Western Machinery and Steel World". February 16, 1922. https://books.google.com/books?id=dvk9AQAAMAAJ&q=what+is+%22goulac%22%3F&pg=PA386.
- ↑ "Miscellaneous Publication". U.S. Department of Agriculture. February 16, 1930. https://books.google.com/books?id=lOAjAQAAMAAJ&q=what+is+%22goulac%22%3F&pg=PA220.
- ↑ 5.0 5.1 Personnel, United States Bureau of Naval Personnel (1952) (in en). Molder 3 & 2. U.S. Government Printing Office. p. 182. https://books.google.com/books?id=8JpEAAAAIAAJ&q=Goulac&pg=PA182.
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