摘要:
Thermoset polymers are prepared by reacting an ethylenically unsaturated resin monomer and a bicyclic amide acetal with a polyisocyanate in the absence or presence of a vinyl monomer. Reaction rates are suitable for effecting RIM processing. The resultant polymers exhibit improved impact resistance. Further variation in physical properties can be achieved through the use of a diol chain extender for the polyisocyanate.
摘要:
Thermoset polymers are prepared by reacting an ethylenically unsaturated resin monomer and a bicyclic amide acetal with a polyisocyanate in the absence or presence of a vinyl monomer. Reaction rates are suitable for effecting RIM processing. The resultant polymers exhibit improved impact resistance. Further variation in physical properties can be achieved through the use of a diol chain extender for the polyisocyanate.
摘要:
The process for preparing polyurethanes by the reaction of a bicyclic amide acetal and a polyisocyanate in the presence of a plasticizer such as dioctyl phthalate and a polyurethane catalyst such as stannous octoate is described.
摘要:
The use of bicyclic amide acetals as compatibilizing agents in the preparation of rigid polyurethane/polyisocyanate foams from certain polyol mixtures, polyisocyanates and fluorocarbon blowing agents is disclosed.
摘要:
A process for preparing novel polymers having interpenetrating networks comprising polymerizing simultaneously a mixture of a bicyclic amide acetal, a polyisocyanate and a vinyl monomer component is described.
摘要:
Novel polymers having excellent physical properties including heat distortion temperatures and izod impact strengths are prepared by the interaction of bicyclic amide acetals with epoxide resins and polyisocyanates.
摘要:
A process for preparing novel interpolymers by the interpolymerization of an oxazoline, a polyol and a polyisocyanate at a temperature in the range of from about 20.degree. C. and at a pressure in the range of from about atmospheric up to about 50 atmospheres is described.
摘要:
A process for preparing a polyurethane by reaction of A, a prepolymer prepared by the low temperature reaction of a polyisocyanate and a polyepoxide, with B, a polyol, is described.
摘要:
A process is described for preparing novel polyurethane polymers which have good impact resistance and other desirable physical properties, said process comprising interpolymerizing a mixture of a bicyclic amide acetal, a polyol and a polyisocyanate.
摘要:
This invention is the polycapped oligomer adduct of a long chain fatty acid with a multi hydroxy functional or multi epoxy functional compound. This polycapped oligomer is useful in resin compositions to enhance the performance of thermoplastic low profile additives which improve the surface quality of molded composites such as automotive body panels.