摘要:
The invention relates to the use of tripotassium citrate monohydrate and other alkali metal salts of polybasic acid as bench life extenders in heat curable hot box foundry mixtures comprising sand, thermosetting binder resin, and a latent acid catalyst composition. In one embodiment, the thermosetting binder resin is a phenolic resole resin modified with urea formaldehyde resin. In another embodiment, the thermosetting binder resin is a furfuryl alcohol resin modified with urea formaldehyde resin.
摘要:
An adhesive dressing comprising a backing layer, a pressure sensitive adhesive thereon and a support layer attached to the non-adhesive surface of the backing layer characterized in having an additional edge strip component on the adhesive surface to aid adhesion of the dressing to the skin.