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    • 20. 发明授权
    • Phenolic resin for glue sizing composition, preparation method and glue sizing composition containing same
    • 胶浆组合物用酚醛树脂,其制备方法和含有该胶料的上胶组合物
    • US06342271B1
    • 2002-01-29
    • US09462459
    • 2000-04-27
    • Bernard LericqueSerge TetartClaire LabbePhilippe Espiard
    • Bernard LericqueSerge TetartClaire LabbePhilippe Espiard
    • B05D302
    • C03C25/34C03C25/26C08G14/08
    • The invention relates to a resin composition based on a urea-modified phenol-formaldehyde resole which has a formaldehyde/phenol molar ratio of 2 to 5, exhibiting a free formaldehyde content lower than or equal to 3 percent (by weight relative to the total weight of the composition), a free phenol content lower than or equal to 0.5 percent and a dilutability measured at 20° C., of at least 1000 percent and to a process for the preparation of this composition. This composition is characterized in that it contains an overcondensed resole obtained by the condensation of phenol, of formaldehyde, and optionally of urea in basic medium, until the product has a water dilutability at pH 9 that is lower than or equal to 2000 percent, or the product of neutralization of such as resole. The modification of an overcondensed phenolic resole by neutralization with boric acid according to the invention permits the dilutability of the resole to be increased. An application is for sizing composition s for products based on mineral wool with a reduction in atmospheric pollution upon use.
    • 本发明涉及一种基于尿素改性酚醛树脂的树脂组合物,其具有2至5的甲醛/苯酚摩尔比,其游离甲醛含量低于或等于3%(以总重量计) 的组合物),游离酚含量低于或等于0.5%,并且在20℃下测量的可稀释度为至少1000%,以及制备该组合物的方法。 该组合物的特征在于其含有通过苯酚,甲醛和任选的尿素在碱性介质中缩合获得的过度稠化的甲阶酚醛树脂,直到产物在pH9下具有低于或等于2000%的水稀释度,或 中和的产物如抗坏血酸。 通过根据本发明用硼酸中和来改性过度稠化的酚醛树脂,可以提高甲阶酚醛树脂的稀释性。 一种应用是用于基于矿棉的产品的成分尺寸调整,使用时会降低大气污染。