Disclosed herein are ambient temperature-curable compositions of improved pot life comprising epoxy-containing vinyl polymers and oxygen-containing amines. Coating compositions comprising the same cure at ambient temperature to produce films of excellent properties.
Coating compositions which comprise: (i) a hydroxy-functional compound containing in the molecule an average of at least two hydroxyl groups; (ii) an anhydride-functional compound containing in the molecule an average of at least two cyclic carboxylic acid anhydride groups; and (iii) an epoxy-functional compound containing in the molecule an average of at least two cycloaliphatic epoxy groups, provide low temperature cure response and excellent durability.
Liquid, polymerisable composition yielding optical articles showing a high refractive index
申请人:GREAT LAKES CHEMICAL ITALIA S.r.l.
公开号:EP0331260A2
公开(公告)日:1989-09-06
A liquid composition, polymerisable by means of a free-radical route to yield optical articles endowed with a high refractive index, contains an allyl-carbonate derivative definable with the general formula:
(wherein R1, X1, X2, X3, X4, X5, X6, a and b are as defined in the disclosure) and a copolymerisable monomer containing at least one ethylenic unsaturation in its molecule.
一种液态组合物,可通过自由基途径进行聚合,生成具有高折射率的光学产品,该组合物包含一种可按通式定义的碳酸烯丙酯衍生物:
(其中 R1、X1、X2、X3、X4、X5、X6、a 和 b 如公开资料中所定义)和一种可共聚单体,该单体分子中至少含有一个乙烯基不饱和度。
Method for extending the potlife of polyol/polyisocyanate mixtures
申请人:THE SHERWIN-WILLIAMS COMPANY
公开号:EP0532899A1
公开(公告)日:1993-03-24
A method for extending the pot-life of a curable composition comprising a mixture of at least one active hydrogen-containing material, such as a polyol or polyamine, and a polyisocyanate, which method comprises incorporating within the mixture a pot-life extending amount of a polyanhydride having an average of at least two anhydride groups per molecule.
The present application describes a method for initial polymerization or gelling a composition of epoxy resin at a temperature of 50° C. or less, over a period of 24 hours or less by the incorporation of a fluorinated carboxylic acid. The compositions used in the present invention can be gelled without the use of heat or light. The fluorinated carboxylic acid includes a carboxylic acid terminated fluoropolyether. The composition includes a cycloaliphatic epoxy resin. The invention further includes objects that comprise a polymerization product of a composition or materials prepared according to the method In addition, the present application describes the use of such materials in optical systems that include a first component, a second component, and the material disposed between the first and second optical components.