摘要:
Reaction of a mixture of two or more ethers of a methylolated aminotriazine and a mineral acid at a pH of 0 to 3 and a temperature of from 10* to 60*C. to obtain mixed ethers of methylolated aminotriazine.
摘要:
PREPOLYMERIC RESINOUS COMPOSITIONS FROM AN OXAZOLIDINE AND UREA OR MELAMINE AND LOWER ALIPHATIC ALDEHYDE. THE RESINOUS COMPOSITONS POLYMERIZE ON HEATING AND HAVE UTILITY IN BAKING ENAMELS AND IN ELECTRO-DEPOSITION FORMULATIONS TO INCREASE THE SOLVENT RESISTANCE OF THE FILM.
摘要:
An electrodepositable photosensitive resin which is a phenolic novolak resin having(i) at least part of the phenolic hydroxyl groups thereof replaced by a quinone diazide sulphonyloxy group, and(ii) at least part of the aromatic rings thereof substituted in a position ortho and/or para to a phenolic hydroxyl group or quinone diazide sulphonyloxy group by a group of formula --CH(R.sup.1)R.sup.2 whereR.sup.1 represents a hydrogen atom, or an alkyl, aryl or carboxylic acid group, andR.sup.2 represents a sulphonic acid group --SO.sub.3 H or a group of formula --A--R.sup.3 --X,R.sup.3 represents an aliphatic, aromatic or araliphatic divalent group which may be substituted by a carboxlic, sulphonic or phosphonic acid group,A represents a sulphur atom or a group of formula --N(R.sup.4)--, where R.sup.4 represents a hydrogen atom or an alkyl group which may be substituted by a carboxylic acid group or by an optionally etherified hydroxyl group, or R.sup.3 and R.sup.4 together represent an alkylene chain of 2 to 5 carbon atoms linked to the indicated nitrogen atom, which may contain an oxygen atom or an additional nitrogen atom in the chain, andX denotes a carboxylic or sulphonic acid group or, where A denotes --N(R.sup.4)--, X may further represent a phosphonic acid group, an amino group of formula --N(R.sup.5)(R.sup.6), a hydrogen atom or a hydroxyl group, andRhu 5 and R.sup.6 which may be the same or different, each represent a hydrogen atom or an alkyl, aryl, aralkyl or alkenyl group, any of which may be substituted by a hydroxyl group.The resins are useful in the manufacture of printed circuits.
摘要:
Cathodically depositable self-crosslinking binders for electrodeposition based on alkylphenol novolaks wherein an alkylphenol novolak having a molecular weight of at least 500 and a hydroxyl value of between 100 and 700 mg KOH/g, modified through self-condensation or etherification of the phenolic hydroxy groups, obtained through a reaction catalyzed with an acid (component A), is reacted simultaneously or separately with (B) amines which carry a tertiary amino group and at least one hydroxy group or primary or secondary amino group (component B) and (C) aromatic or aliphatic or cycloaliphatic polyisocyanates (component C), the weight ratio of components being chosen in order that for each mole of component (B) 2 to 4 NCO-equivalents of component (C) are present and that the resultant isocyanate-group-free reaction product has an amine value of between 40 and 120 mg KOH/g is described. The binders are internally plasticized to provide increased flexibility of coatings prepared from the binders which are essentially chip resistant.
摘要:
A coating composition capable of being crosslinked on a substrate to which it is applied which contains an acidic filmforming material containing at least two carboxyl groups and a phenolic material containing at least two 47 groups -CH2.NR1R2 substituted in positions ortho and/or para to one or more phenolic hydroxy groups, R1 and R2 being alkyl or substituted alkyl groups.
摘要:
An electrophoretic coating is disclosed. The electrophoretic coating comprises an aqueous medium and a charged film-forming resin dispersed in the aqueous medium. The film-forming resin is acid-insoluble and alkali-soluble.
摘要:
Process for coating a conductive substrate used as the anode in an electrochemical cell, in which a direct electric current is passed from a cathode to the said anode through an electrolytic liquid containing a phenolic monomer in order to form a polymeric film of phenolic resin on the substrate.The electrolyte includes from 10 to 200 g/l of allylphenol or a mixture of such with other phenols, and from 5 to 200 g/l of an aliphatic amine, in solution in a mixture of water and alcohol. The polymeric film is deposited by using an electric current of a density not greater than 50 mA/cm.sup.2 of substrate, and the polymeric film so deposited is heated to a temperature of from 100.degree. to 200.degree. C. in order to induce the hardening of the said resin.
摘要:
Adherent insoluble coating film of a phenolic resin is obtained by electrolysis of an alkaline-reacting aqueous electrolyte comprising phenol, a mono- or di-substituted phenol with substituent(s) in o- or m-position, and an alkylene diamine, in specific proportions. The current density shall never exceed 10 mA/sq.cm. The voltage is from 2.5 V to 10 V and is preferably kept constant. Coating thickness values exceeding 1 micron and up to about 25-30 microns are obtainable within a short time at the expense of 2-2.5 Faradays per mole deposited phenol. The substituted phenol is preferably o-chloro-phenol, and the diamine is preferably ethylenediamine.
摘要翻译:酚醛树脂的粘附不溶性涂膜通过电解包含苯酚,位于或位置上具有取代基的一取代或二取代苯酚和亚烷基二胺的碱性反应性水性电解质而获得, 比例。 电流密度不得超过10 mA / sq.cm。 电压为2.5V至10V,优选保持恒定。 超过1微米和高达约25-30微米的涂层厚度值可以在短时间内以2-2.5法拉姆/摩尔沉积苯酚为代价。 取代苯酚优选为邻氯酚,二胺优选为乙二胺。
摘要:
A water-based polymeric coating comprising a novolak resin is deposited electrolytically from a solution of a novolak resin upon a conductive substrate at an initial current density ranging from 10-30 milliamperes per square centimeter. The resultant coating, after cross linking by subsequent chemical treatment, is flexible, firmly adherent and evidences good thermal stability and insulation characteristics, so suggesting its use as a cover coat for printed circuits.