氨基硅烷偶联剂改性凹凸棒石在UF胶粘剂中的应用研究

Study on attapulgite modified by silane coupler containing amino and its application in urea formaldehyde resin adhesive

利用不同硅烷偶联剂改性ATP(凹凸棒石)或SiO2-ATP,并制备了相应的UF(脲醛树脂)胶粘剂。探讨了改性ATP或SiO2-ATP的工艺条件及其对UF胶粘剂的甲醛释放量、剪切强度等影响。结果表明:含氨基的硅烷偶联剂(A-1160和KH-792)对ATP/UF或SiO2-ATP/UF胶粘剂的甲醛释放量、剪切强度的影响较大;当w(A-1160或KH-792)=15%(相对于ATP质量而言)、w(改性ATP)=10%(相对于甲醛和尿素总质量而言)时,经60℃、3 h吸附后,相应UF胶粘剂的甲醛释放量分别下降了53.27%或53.04%,剪切强度分别增加了57.27%或46.73%;当w(A-1160或KH-792)=15%、w(改性SiO2-ATP)=10%时,经60℃、2 h吸附后,相应UF胶粘剂的甲醛释放量分别下降了34.84%或48.82%,剪切强度分别增加了68.88%或55.38%。

The ATP（attapulgite） or SiO2-ATP were respectively modified by different silane couplers,the corresponding UF（urea formaldehyde resin） adhesives were prepared. The technological conditions and influences of modified ATP or SiO2-ATP on formaldehyde emission and shear strength of UF adhesives were discussed. The results showed that the influences of silane coupler containing amino（A-1160 or KH-792） on formaldehyde emission and shear strength of ATP/UF or SiO2-ATP/UF adhesives were larger. The corresponding UF adhesives had the lower formaldehyde emissions（under 53.27% or 53.04% with modified ATP after absorbing 3 h at 60 ℃, under 34.84% or 48.82% with modified SiO2-ATP after absorbing 2 h at 60 ℃ ） and higher shear strengths （above 57.27% or 46.73% with modified ATP after absorbing 3 h at 60 ℃, above 68.88% or 55.38% with modified SiO2-ATP after absorbing 2 h at 60 ℃） when mass fractions of A-1160 or KH-792 were 15% in ATP, mass fractions of modified ATP or SiO2-ATP were 10% in total formaldehyde and urea.