发明授权
- 专利标题： Heat cured foundry mixes and their use
- 专利标题（中）： 热固化铸造混合料及其用途
-
申请号： US423599申请日： 1995-04-17
-
公开(公告)号： US5607986A公开(公告)日： 1997-03-04
- 发明人: Young D. Kim, deceased , A. Leonard Haugse
- 申请人： Young D. Kim, deceased , A. Leonard Haugse
- 申请人地址： OH Columbus
- 专利权人： Ashland Inc.
- 当前专利权人： Ashland Inc.
- 当前专利权人地址： OH Columbus
- 主分类号： B22C1/22
- IPC分类号： B22C1/22 ; C08L31/04 ; C08L61/00 ; C08L95/00
摘要：
This invention relates to nitrogen free heat cured foundry mixes essentially free of free formaldehyde comprising (a) a nitrogen free modified furan resin, (b) furfuryl alcohol, (c) polyvinyl acetate, preferably(d) a tar selected from the group consisting of resorcinol pitch, bisphenol A tar, and (e) a latent acid curing catalyst. The foundry mixes are used to prepare foundry shapes. They are cured in the presence of the latent acid curing catalyst by heating at an elevated temperature.
公开/授权文献
信息查询
