路虎是哪国车专利名称：Phenol formaldehyde resins 发明人：BARRY WILLIAM RYAN
申请号：AU8722698
程控交换机申请日：19980819
三省六部制的作用
公开号：AU8722698A
疫情青年公开日：
19990308
小小的船儿歌专利内容由知识产权出版社提供西兰花
来月经不能吃哪些东西
摘要：A process for forming a phenol formaldehyde resin, the process comprising the steps of: (i) reacting phenol with an excess of a formaldehyde material in the prence of an acid or ba catalyst until water parates from the reactants as an immiscible layer; (ii) adding a mixture comprising an excess of polyhydric alcohol and an aromatic dicarboxylic or tricarboxylic acid, salt or anhydride thereof to the phenol and formaldehyde reaction mixture followed by addition of an alpha hydroxy acid; (iii) adding a non-aqueous solvent, wherein at least some of said water is removed either before addition of the mixture preparated in step (ii) or after addition of the alpha hydroxy acid; (iv) preparing a solution comprising a Lewis acid, a polyhydric alcohol, an alpha hydroxy acid, a non-aqueous solvent, an aromatic sulphonic acid and sulphuric or hydrochloric acid; (v) adding the solution formed in step (iv) to the mixture formed in step (ii) and allowing the mixture to cure.
第一次国共合作正式建立的标志是申请人：BARRY WILLIAM RYAN
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