发明授权
US4942217A Novel heat-hardenable binders phenol-formaldehyde+HMT+acid 失效
新型热硬化粘合剂酚醛+ HMT +酸

Novel heat-hardenable binders phenol-formaldehyde+HMT+acid
摘要:
A heat-hardenable binder comprising (a) a phenolic resin of a phenolic compound and formaldehyde in a molar ratio of 1:1 to 1:2 and (b) an effective amount of a hardener mixture of hexamethylenetetramine and an acidic latent hardening agent with reduced emission problems and curing rapidly.
信息查询
0/0