摘要:
Highly methylated methylolguanamines, such as a methylated tetramethylolbenzoguanamine or tetramethylolacetoguanamine, are advanced by heating under acid to neutral conditions with an advancement agent such as benzoguanamine, acetoguanamine, ethyleneurea, 1,3-propyleneurea, melamine, or urea. The products may be heated with resins containing at least two alcoholic hydroxyl, carboxylic acid, or carboxylic amide groups per molecule to form hard, crosslinked coatings. They are particularly useful in powder coatings.
摘要:
Aqueous dispersions of a phenolic resole and a thermoplastics polymeric material or a rubber, suitable for use as adhesives, are prepared by(a) dissolving a solid thermoplastics polymeric material, such as a polyvinyl acetal or a nylon polyamide, or rubber in a phenol,(b) adding a nonionic or anionic surface active agent and/or protective colloid,(c) adjusting the mixture to a pH above 7 by addition of a base,(d) adding aqueous formaldehyde solution, or a formaldehyde donor, to a molar ratio of phenol to formaldehyde within the range 1:1 to 1:3,(e) if necessary, adding water, and(f) heating the mixture to form a phenolic resole.
摘要:
New compounds of formula ##STR1## where R.sup.1 represents --NR.sup.2 R.sup.3, an alkyl group, a mononuclear aryl group, a phenylalkylene group, or a group of formula ##STR2## R.sup.2 and R.sup.3 each represent --H, --CHR.sup.4 OR.sup.5, --CHR.sup.4 --S--R.sup.6 --COOQ, or ##STR3## R.sup.2 and R.sup.3 in formulae I and III being such that at most one represents a group of formula III and at least two each represent a group --CHR.sup.4 --S--R.sup.6 --COOQ,R.sup.4 and R.sup.5 represent --H or alkyl groups,R.sup.6 is an alkylene group, optionally substituted by a carboxyl group,at least two Q in formula I represent --H and the remainder may alternatively represent alkyl groups,m is 1, 2, or 3, andn is zero or 1,e.g., hexakis(N-2-carboxyethylthiomethyl)melamine, a tris(N-2-carboxyethylthiomethyl)tris(N-2-(butoxymethyl)melamine, or tetrakis(N-2-carboxyethylthiomethyl)acetoguanamine,are useful as curing agents for epoxide resins.
摘要翻译:新的式(I)化合物,其中R 1表示-NR 2 R 3,烷基,单核芳基,苯基亚烷基或式II基团和R 2基团各自表示-H,-CHR 4 OR 5,-CHR 4 - 式I和III中的S-R6-COOQ或 III R2和R3使得至多一个表示式III的基团,并且至少两个表示-CHR4-S-R6-COOQ基团,R4和 R5代表-H或烷基,R6是任选被羧基取代的亚烷基,式I中至少两个Q代表-H,余数可以代表烷基,m是1,2或3,和 n为0或1,例如六(N-2-羧乙硫基甲基)三聚氰胺,三(N-2-羧乙基硫甲基)三(N-2-(丁氧基甲基)三聚氰胺或四(N-2-羧乙硫基甲基)乙酰胍胺 可用作环氧树脂的固化剂。