有机磷阻燃剂改性水性聚氨酯的制备

Preparation of waterborne polyurethane modified by organic phosphorus flame retardant

以聚己二酸-1,4-丁二醇酯二醇(PBA)、2,2-二羟甲基丙酸(DMPA)、异佛尔酮二异氰酸酯(IPDI)和有机磷阻燃剂10-(2,5-二羟基苯基)-10-氢-9-氧杂-10-膦杂菲-10-氧化物(DOPO-HQ)等为原料制备了阻燃型水性聚氨酯(WPU),考察了DOPO-HQ含量对WPU的黏度、硬度、力学性能和氧指数(LOI)等影响。结果表明:当DOPO-HQ含量从0增至12%(相对于PBA质量而言)时,WPU的黏度降低,成膜硬度增大,断裂伸长率下降,而拉伸强度由11.02 MPa提高到23.76 MPa,LOI由21.0%提高到27.2%(达到难燃级别)。

With polybutanediol glycol adipate （PBA） , dihydroxymethyl propionate （DMPA） , isophorone diisocyanate （IPDI） and 10- （2, 5- dihydroxyphenyl） - 10- dihydro- 9- oxa- 10- phosphaphenanthrene- 10- oxide （DOPO-HQ） as raw materials, a series of flame-proof waterborne polyurethane （WPU） were synthesized. And the influences of DOPO-HQ contents on WPU＇s viscosity, hardness, mechanical property and oxygen index （LOI） were investigated. The results showed that the WPU＇s viscosity and elongation at break were decreased, filmhardness was increased, tensile strengths were increased from 11.02 MPa to 23.76 MPa, and the LOIs were increased from 21.0% to 27.2% （ flame retardant grade） while mass fractions of DOPO-HQ in PBA were increased from 0 to 12%.