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    • 9. 发明授权
    • Fiberglass binders
    • 玻璃纤维粘合剂
    • US06472469B2
    • 2002-10-29
    • US09811223
    • 2001-03-16
    • Derek C. BristolThomas J. TaylorSteven D. Dawson
    • Derek C. BristolThomas J. TaylorSteven D. Dawson
    • C08L8360
    • C03C25/34C03C13/00C03C2213/02
    • Using urea extended phenolic binders with a resin to urea solids ratio below 60/40 can significantly reduce production costs in the manufacture of fiberglass products without adversely affecting product performance or producing formaldehyde or ammonia emissions at unacceptable levels. The phenolic binders are produced by reacting urea with phenolic resins that are prepared in a reaction in which the formaldehyde and phenol are initially present in mole ratios of greater than 3.75:1. In preparing the phenol/formaldehyde based binder, the molar ratio of free formaldehyde to urea must be carefully controlled in order to minimize emissions of ammonia and formaldehyde. Typically this molar ratio is kept between 0.8 and 1.0, therefore, higher free formaldehyde resins may be reacted with a higher percentage of urea to maintain the target formaldehyde to urea molar ratio. No ammonia is needed in the making the phenolic binder.
    • 使用尿素延伸的酚醛树脂粘合剂,其树脂与尿素固体比率低于60/40可以显着降低制造玻璃纤维产品的生产成本,而不会对产品性能产生不利影响或产生不可接受的水平的甲醛或氨的排放。 酚类粘合剂通过使尿素与酚醛树脂反应制备,酚醛树脂在甲醛和苯酚最初以大于3.75:1的摩尔比存在的反应中制备。 在制备苯酚/甲醛基粘合剂时,必须仔细控制游离甲醛与尿素的摩尔比,以减少氨和甲醛的排放。 通常,该摩尔比保持在0.8和1.0之间,因此,较高的游离甲醛树脂可以与较高百分比的脲反应以维持目标甲醛与尿素的摩尔比。 在制备酚醛粘合剂时不需要氨。