WebThe invention discloses a phenolic resin and a preparation method thereof The preparation method comprises the following steps: mixing m-cresol and p-cresol with tert-butylphenol to obtain a first mixture; mixing and reacting the first mixture with formaldehyde and an acidic catalyst to obtain a second mixture; and distilling the second mixture at reduced pressure … WebIs p-tert-butylphenol-formaldehyde resin (PTBP-FR) in T.R.U.E. TEST ® (Mekos test) sensitizing the tested patients? However, the interpretation of the findings is open to question. In patch tests of about 1000 patients, 5 (0.5%) females, 4 of whom were atopic (three had a history of atopic eczema), had late reactions.

Bra-associated allergic contact dermatitis: p-tert-butylphenol

WebThis patient information on 4-Tert-Butylphenol Formaldehyde Resin is provided by John L. Meisenheimer, M.D. a board certified Dermatologist and skin care specialist based in Orlando, Florida. This information is not intended as a substitute for the medical advice or treatment of a dermatologist or other physician. Web首页 / 专利分类库 / 一般的物理或化学的方法或装置 / 是有关分离的最通用的小类，但不包括从固体中分离出固体。 / 用其他的液体取代被置换的液体，例如，从湿的固体或从弥散的液体或从在液体内的固体中置换 / Process for dedusting solids-containing hydrocarbon oils shell fully formulated 50/50 w/sca coolant

Substance Information - ECHA - Europa

WebPhenol-formaldehyde. (d) Rosin salts: Calcium resinate (limed rosin). Zinc resinate. (vi) Phenolic resins as the basic poly-mer formed by reaction of phenols with formaldehyde: (a) Phenolic resins formed by reac-tion of formaldehyde with: Alkylated (methyl, ethyl, propyl, isopropyl, butyl) phenols. p-tert-Amylphenol. 4,4′-sec-Butylidenediphenol. Webformed during the alkali-catalysed condensation of p-tert-butyl phenol with formalde-hyde. The final macromolecular condensate, the p-tert-butyl phenol formaldehyde resin, is considered too large to penetrate the skin (Malten 1973). Positive test results with both the synthetic resin glue and the p-tert-butyl phenol (Malten 1958) and other p ... Web2 days ago · Para-tertiary-butylphenol-formaldehyde resin is the most frequently used resin, especially as adhesives. Other areas of use include thermosettings, laminates and impregnations, binders, surface coatings, and abrasive paper. Phenol-formaldehyde resins occur as resoles, resins and resites depending of the degree of cross-linking. spongebob arrgh tv tropes