摘要:
The present invention relates to a process for reducing the content of free formaldehyde in a commercial phenol-formaldehyde resin, comprising the step of treating a phenol-formaldehyde resin with at least one phenol derivative or aniline derivative, wherein the pH of the resin is 7 or higher. The present invention further relates to a phenol-formaldehyde resin resulting from this process. The phenol-formaldehyde resin obtained by the process of the present invention may be used for the preparation of a binder composition for mineral wool products.
摘要:
The present invention provides methods for producing water insoluble, aqueous alkali soluble novolak resins having a very low level of metals ions, utilizing a specially treated anion exchange resin. A method is also provided for producing photoresist composition having a very low level of metal ions from such novolak resins and for producing semiconductor devices using such photoresist compositions.
摘要:
The present invention is a cyanato group containing phenolic resin, and to phenolic triazine resins derived therefrom. The cyanato group containing phenolic resin of the present invention can be completely cured to form a phenolic triazine resin having a glass transition temperature equal to or greater than 250 DEG C.
摘要:
The invention relates to a composition comprising: at least one binder chosen from phenolic resins, and particles formed from at least one pulverulent solid chosen from glass, polymers and silica, and mixtures thereof, said particles having an average size of less than 1 mm, characterized in that it comprises between 34% and 50% by weight of said pulverulent material relative to the total weight of said composition. The invention extends to a sandwich composite material comprising such a composition and to a process for preparing such a sandwich composite material.
摘要:
L'invention concerne une composition comprenant : au moins un liant choisi parmi les résines phénoliques, des particules formées d'au moins un solide pulvérulent choisi parmi le verre, les polymères, la silice et leurs mélanges, lesdites particules présentant une taille moyenne inférieure à 1 mm, caractérisée en ce qu'elle comprend entre 34 % et 50 % en poids dudit matériau pulvérulent par rapport au poids total de ladite composition. L'invention s'étend à un matériau composite sandwich comprenant une telle composition et à un procédé de préparation d'un tel matériau composite sandwich.
摘要:
An aqueous binder composition suitable for use as a binder in making wool and board products including fiberglass insulation comprising a phenolic resole resin binder made from phenol and formaldehyde by using an excess amount of a basic catalyst.
摘要:
The present invention provides methods for producing a photoresist having a very low level of metal ions, utilizing a treated chelating ion exchange resin to make the neutral ammonium salt or acid form. A method is also provided for producing semiconductor devices using such photoresist compositions.