A method for protecting heat sensitive substrates from fire and excessive heat involves:
I. applying to the substrate a layer of a char forming intumescent curable composition comprising:
(a) an epoxide group containing material, at least 20 weight percent of said material having an oxirane functionality greater than 2;
(b) a curing agent adapted to cure the epoxide group containing material;
(c) an additive component comprising a mixture of materials adapted to provide a source of:
(i) phosphorous,
(ii) zinc,
(iii) boron and
(iv) an expansion gas upon thermal decomposition,
said curable composition being capable of forming a carbonaceous char upon exposure to heat or flame;
II. allowing the intumescent curable composition to at least partially cure.
一种保护热敏基底免受火灾和过热影响的方法包括:
I. 在基材上涂上一层成
炭膨胀固化组合物,该组合物包括
(a) 含环氧基团的材料,其中至少 20%的材料的
环氧乙烷官能度大于 2;
(b) 用于固化含环氧基团材料的固化剂;
(c) 一种添加剂成分,由适于提供下列物质来源的材料混合物组成:
(i)
磷
(ii)
锌
(iii)
硼
(iv) 热分解时的膨胀气体、
所述固化成分在受热或遇明火时能形成碳质
炭化物;
让膨胀固化组合物至少部分固化。