Abstract:
[Objective]The object of the present invention is to provide a fiber reinforced plastic molded article having favorable close contact properties with reinforcing fibers and superior mechanical strength.[Constitution]A fiber reinforced plastic molded article obtained by molding a fiber reinforced plastic molding material comprising a radical polymerizable resin composition and reinforcing fibers, wherein the radical polymerizable resin composition contains at least a urethane (meth) acrylate resin component (a) containing a urethane (meth) acrylate resin compound represented by the following chemical formula [Chemical 1]: XM]n [Chemical 1] (in the formula, wherein n is within a range from 2 to 100, X is a compound residue having two or more isocyanate groups, and M contains at least formula [Chemical 2]: —N═C═O [Chemical 2] and M other than the above formula [Chemical 2] is a formula [Chemical 3]: in the formula [Chemical 3], Q represents a mono alcohol compound residue containing ethylene unsaturated groups) and an organic tin compound component (b); and the component (a) and the component (b) are mixed prior to curing.
Abstract:
The present invention relates to a polyisocyanate composition comprising, on the basis of the total mass of the polyisocyanate composition, 97 weight % or more of a polyisocyanate, and 2.0 mass ppm or more and 1.0×104 mass ppm or less of a compound having at least one unsaturated bond in which the compound is a different compound from the polyisocyanate, or 5.0 mass ppm or more and 2.0×104 mass ppm or less of at least one inactive compound selected from the group consisting of a hydrocarbon compound, an ether compound, a sulfide compound, a halogenated hydrocarbon compound, a Si-containing hydrocarbon compound, a Si-containing ether compound, and a Si-containing sulfide compound.
Abstract:
Uretdione-functional polyaddition compounds of the formula: ##STR1## Y and Y' are O, NH, or NR.sup.5 ; n is 1-20;R is ##STR2## R.sup.1 is a divalent hydrocarbon radical of 2-16 carbon atoms; R.sup.2 is H, identical or different hydrocarbon radicals of 1-14 carbon atoms;R.sup.3, R.sup.4 and R.sup.5 are identical or different hydrocarbon radicals of 1-14 carbon atoms, by reacting IPDI uretdione with at least one reactant selected from the group consisting of diols, amino alcohols and diamines in a solution (L1) thereby forming the product (UD-DA) polyaddition compound, and adding the solution (L1) to a second solvent (L2) in which the uretdione polyaddition compound is insoluble, thereby precipitating said polyaddition compound (UD-DA).
Abstract:
Process for the preparation of filled heat-curable compounds of the polyurethane type by reaction of condensation of the constituents of the desired compound in the presence of a pulverulent filler, which is characterized in that the said filler is predispersed in the presence of a stabilizing agent in a liquid organic phase compatible with the desired heat-curable compound in the course of its formation reaction, the said filler being then in the form of a homogeneous and stable suspension, and the suspension thus prepared is then introduced into the reaction mixture before, during or after the introduction of at least one of the constituents of the desired heat-curable compound.The process according to the invention makes it possible to produce compounds of the polyurethane type whose mechanical and physical characteristics are at least equivalent or even improved in relation to those of the unfilled identical compounds by virtue of the excellent distribution of the inorganic filler.
Abstract:
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.
Abstract:
The softness of filled polyurethane foams is enhanced by the incorporation in the formulation used to make the foam of a polyethylene glycol softening agent. Generally, from about 2 to about 12 parts by weight of polyethylene glycol can be used in the foam formulation. Use of this glycol softening agent obviates the need for relatively high amounts of halogenated hydrocarbon auxiliary blowing agents with the water blowing agent normally used and this obviates the foam processing instability which can result from use of such high levels of auxiliary blowing agent. If desired, the polyethylene glycol softening agent can be combined with a liquid compatible plasticizer (e.g. a phosphate or phthalate plasticizer) to ensure that it is in a liquid form for processing ease of the foamable formulation used to make the foam.
Abstract:
There are disclosed aqueous colloidal dispersions of tertiary amine salts of urea-urethane polymers of triamine-containing polyamines and isocyanate-terminated, urethane prepolymers having carboxylic groups. The urea-urethanes have sufficient tertiary amine neutralized, carboxylic groups to provide stable, aqueous dispersions having infinite dilutability with water, and the solids of the amine-neutralized dispersions are essentially of colloidal size. Carboxylic groups are supplied by polyol reactants employed in making the prepolymers. The colloidal, urea-urethane polymers may be stably dispersed in the aqueous medium, even in the absence of substantial amounts of cosolvents, and are useful in, for instance, coating compositions to provide water-resistant coatings.
Abstract:
Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150*C, a polyisocyanate and a nonamine-containing catalyst, instantly set, after a brief induction period, to a solid, dense, non-elastomeric polymeric product which can be demolded within a period of from less than about 1 minute to about 5 minutes.
Abstract:
Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150*C, such as an organic carbonate, a polyisocyanate and a non-amine-containing catalyst, instantly set, after a brief induction period, to a solid, dense, nonelastomeric polymeric product which can be demolded within a period of from less than about 1 minute to about 5 minutes.