Abstract: Thermally stable bisimido polymers, devoid of diamine component and well adapted for the production of laminates, are prepared by copolymerizing (a) an N,N'-bismaleimide with (b) an acrylate comonomer, e.g., a novolak epoxy (meth)acrylate, in the presence of a catalytically effective amount of (c) an imidazole compound, and, optionally, (d) a chlorinated or brominated epoxy resin, or admixture thereof with a non-chlorinated or non-brominated epoxy resin.

Abstract: Imido prepolymers and thermally stable imido polymers, well adapted for the production of a wide variety of useful molded or laminated shaped articles, or cellular materials, are prepared by reacting, at elevated temperatures, (a) at least one N,N'-bismaleimide, with (b) at least one aromatic di(meth)acrylate, in the presence of a catalytically effective amount of (c) an imidazole.

Abstract: Novel heat-stable imido polymers, well adapted for the production of prepregs, are prepared by copolymerizing (a) at least one N,N'-bisimide with (b) at least one hindered aromatic diprimary diamine, (c) optionally, at least one unhalogenated comonomer other than a bisimide, (d) optionally, an imidazole compound, (e) at least one diamino-s-triazine, and (f) at least one chlorinated or brominated epoxy resin (f1), or N,N'-alkylenebistetrahalophthalimide (f2), or halogenated aromatic compound containing two (meth)-allyloxylated benzene nuclei (f3), or unhalogenated epoxy resin (f4).

Abstract: Novel thermosetting compositions, well adapted for the production, e.g., of molded and laminated shaped articles, are comprised of a copolymerizate of (a) at least one N,N'-bisimide, (b) at least one diprimary diamine, and (c) at least one epoxy resin.

Abstract: Imido prepolymers and thermally stable imido polymers, well adapted for the production of a wide variety of useful molded or laminated shaped articles, or cellular materials, are prepared by reacting, at elevated temperatures, (a) at least one N,N'-bismaleimide, with (b) at least one aromatic di(meth)acrylate, in the presence of a catalytically effective amount of (c) an imidazole.

Abstract: Novel thermosetting compositions, well adapted for the production, e.g., of molded and laminated shaped articles, are comprised of a copolymerizate of (a) at least one N,N'-bisimide, (b) at least one diprimary diamine, and (c) at least one epoxy resin.

Abstract: Thermally stable bisimido polymers, devoid of diamine component and well adapted for the production of laminates, are prepared by copolymerizing (a) an N,N'-bismaleimide with (b) an acrylate comonomer, e.g., a novolak epoxy (meth)acrylate, in the presence of a catalytically effective amount of (c) an imidazole compound, and, optionally, (d) a chlorinated or brominated epoxy resin, or admixture thereof with a non-chlorinated or non-brominated epoxy resin.

Abstract: A protective product for treating fresh concrete or mortar. The products are a mixture of (a) an aqueous dispersion A of a film-forming synthetic polymer (the synthetic polymer is compatible with fresh concrete or mortar) having little or no permeability to water vapor with (b) at least one coagulant for the film-forming synthetic polymer when in the presence of calcium ions. The coagulant is introduced in the form of an aqueous or aqueous alcoholic solution and/or by means of an aqueous wax emulsion and/or by means of an aqueous dispersion B of a synthetic polymer which is slightly permeable or impermeable to water. The aqueous dispersion B is prepared by polymerization in the presence of the coagulant. When applied by spraying to the surface of fresh mortar, the products form a continuous waterproof film, which is readily removed by peeling.

Abstract: The present invention provides a water-based lime dispersion paint comprising a binder, a pulverulent, and one or more adjuvants. The binder comprises a film-forming copolymer of an alkyl acrylate monomer and a nonionic ethylenic monomer. The copolymer is dispersed in an aqueous medium and the dispersion is stable at a basic pH. The nonionic ethylenic monomer is capable of forming a homopolymer having a glass transition temperature in the range of 70.degree. C. to 170.degree. C. The pulverulent material comprises one or more pigments and airy slaked lime having a low hydraulicity index. The adjuvants are stable at a basic pH and include D-sorbitol as a stabilizer.

Abstract: Polyester films which are self-adhesive under pressure are provided, said films having, on one face thereof, an adhesive layer which comprises a copolymer of vinyl acetate and a maleate ester of an aliphatic alcohol having 4 to 10 carbon atoms. These films have the advantage that they can be rolled up and then unrolled without the adhesive layer becoming detached.