摘要:
Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a polydiorganosiloxane precursor having oxalylamino groups. The polydioroganosiloxane polyoxamide block copolymers are of the (AB)n type.
摘要:
A multilayer film includes a first layer of a first polymeric material and a second layer of a second polymeric material. The first material has a first index of refraction and the second material has a second index of refraction less than the first index of refraction. In one embodiment, the second material includes a polydiorganosiloxane polyamide block copolymer. In another embodiment, the second material includes a polydiorganosiloxane polyoxamide block copolymer.
摘要:
Cyclic silazanes containing an oxamido ester group and methods of making these compounds are described. The compounds can be used, for example, to make oxamido ester-terminated siloxanes, which can be precursors for the preparation of various polymeric materials such as, for example, polydiorganosiloxane polyoxamides.
摘要:
Polyurethane-based adhesives of the invention comprise the reaction product of: an isocyanate-reactive component comprising at least two isocyanate-reactive materials, the at least two isocyanate-reactive materials comprising a first isocyanate-reactive material having a weight average molecular weight of less than 2,000 and a second isocyanate-reactive material having a weight average molecular weight of 2,000 or more; an isocyanate-functional component; an optional reactive emulsifying compound; and an optional chain extending agent. The adhesives, which are preferably pressure-sensitive adhesives, can be prepared from 100% solids, waterborne or solventborne systems.
摘要:
Polyurethane-based pressure-sensitive adhesives (PSAs) of the invention comprise the reaction product of: a polyol component comprising at least one diol having a weight average molecular weight of at least about 2,000, wherein the at least one diol comprises less than about 8 weight % monols; an isocyanate-functional component; an optional reactive emulsifying compound; and an optional chain extending agent. The PSAs can be prepared from 100% solids, waterborne or solventborne systems.
摘要:
Isomaleimides and polyisomaleimides can be prepared by a method comprising the steps in sequence: admixing a maleamic acid or polymaleamic acid with an acid halide, reacting the admixture with a tertiary amine at a temperature sufficiently low to suppress the formation of a maleimide, and isolating the resulting isomaleimide or polyisomaleimide. Polymerization of a polyisomaleimide with a polynucleophilic monomer (polythiol, polyol, polyamine) produces novel polymers.
摘要:
Epoxy reactive liquid modifiers include acrylate functionalized compounds, acrylamide functionalized compounds, oxalic amide functionalized compounds, actoacetoxy functionalized urethanes and acetoacetoxy functionalized polyalkenes. The reactive liquid modifiers are incorporated into epoxy resin compositions comprising a curable epoxy resin, an amine curing agent, and the reactive liquid modifier, wherein the reactive liquid modifier is polymerized to form at least one of an interpenetrating polymer network and a semi-interpenetrating polymer network with the curable epoxy resin.