Title:
NOVOLAC-TYPE PHENOL RESIN, RESIN-COATED SAND FOR SHELL MOLD, AND TEMPLATE
Document Type and Number:
Japanese Patent JP2006137928
Kind Code:
A
Abstract:
To provide a novolac-type phenol resin giving little generation of heat degradation products derived from a binder and produced during molding without reducing template characteristics and improved in stickiness of the heat degradation product when the resin is used as the binder of RCS for shell mold.
The novolac-type phenol resin contains ≤10% sum content of the monomer and the dimer of phenol measured by gel chromatography area and has ≤3.0 dispersion rate (Mw/Mn) of weight average molecular weight (Mw) over number average molecular weight (Mn) and ≤0.95 ratio of ortho bondings/para bondings of methylene groups.
Inventors:
FURUSAWA HIROSHI
Application Number:
JP2005273617A
Publication Date:
June 01, 2006
Filing Date:
September 21, 2005
Export Citation:
Assignee:
ASAHI ORGANIC CHEM IND
International Classes:
C08G8/04; B22C1/22; B22C9/02
Foreign References:
| WO2003042267A1 | 2003-05-22 |
Attorney, Agent or Firm:
Keisuke Watanabe
Yoshihiro Yamaguchi
Yoshihiro Yamaguchi