摘要:
Reactive systems consisting of organic polyisocyanates, organic polyepoxides, polymer modifiers, special catalysts and optionally other auxiliary agents and additives.
摘要:
This invention relates to new powder formulations consisting of (a) at least one agrochemical active compound, (b) at least one biodegradable hydroxyl-containing polyester, optionally in a mixture with one or more further biodegradable polymers, and (c) optionally, additives, and which have a particle diameter of under 125 μm, and further relates to a process for the preparation of the new powder formulations and to their use for applying agrochemical active compounds to plants and/or their environment.
摘要:
The present invention relates to powder formulations which consist of at least one agrochemical active substance, at least one polyurethane and/or polyurethane urea, and, if appropriate, additives and which have a particle diameter of less than 125 μm, to processes for the preparation of these formulations and to their use for applying agrochemical active substances.
摘要:
New powder formulations consisting of at least one agrochemical active compound, at least one copolymer of styrene and acrylonitrile with an acrylonitrile content of between 20 and 40% by weight, and, if appropriate, additives and which have a particle diameter of under 125 μm, a process for the preparation of the new powder formulations, and their use for applying agrochemical active compounds to plants and/or their environment.
摘要:
The present invention relates to coating composition, which is suitable for preparing light fast coatings and contains a cosolvent-free, aqueous, anionic dispersion of polyurethane-ureas, the solids content of which contains the reaction product, present at least partially in salt form, ofa) an NCO prepolymer prepared fromi) an aliphatic and/or cycloaliphatic diisocyanate,ii) a macrodiol having a number average molecular weight of 500 to 10,000iii) a 2,2-bis-(hydroxymethyl)alkane monocarboxylic acid andiv) a diol having a molecular weight of 62 to 400, withb) optionally a diamine,c) a monofunctional chain terminating agent,d) water ande) a neutralizing agent,provided that the NCO content of the prepolymer is up to 25% lower than the theoretical value, the entire polyurethane-urea synthesis reaction is performed in the homogeneous phase and no cosolvent having a boiling range of greater than 100.degree. C. is used during the preparation of the dispersion of polyurethane-ureas.The present invention also relates to light fast coatings prepared from these coating compositions and to a process for preparing these coating compositions. Finally, the present invention relates to peelable coatings and to a method for recycling these coatings.
摘要:
Reactive systems comprising of a specific polyisocyanate component and a reactive component for this polyisocyanate component, as well as non-reactive plasticizers and if appropriate other auxiliaries and additives, and a process for the preparation of polyurethane plastics containing isocyanurate groups using this reactive system.
摘要:
It is now possible to provide reaction resin mixtures based on organic polyisocyanates and organic polyepoxides that can be hot-cured to high-quality plastics having isocyanurate and oxazolidinone groups that are largely storage-stable at room temperature, without their curing having to be stopped at any time, so that the systems exist in an intermediate "B-stage" (i.e., in a state that is solid at ambient or moderately elevated temperature but still fusible), so that at any later time, for example after pulverizing or dissolving in a suitable solvent, they can be converted by shaping and further thermal action to their ultimate, crosslinked and no longer fusible final state.
摘要:
The present invention relates to a reaction resin composition comprising a mixture of polyisocyanates, epoxides, and amine catalysts of the formula ##STR1## wherein A is independently alkylene, alkenylene, alkynylene, alkylidene, cycloalkylene, or aralkenylene; m is an integer of from 0 to 30; R.sup.1, R.sup.2 and R.sup.3 are independently optionally substituted aralkyl or polyaralkyl; and R.sup.4 is alkyl, alkenyl, alkynyl, cycloalkyl, or optionally substituted aralkyl or polyaryalkyl.
摘要翻译:本发明涉及一种反应树脂组合物,其包含下式的多异氰酸酯,环氧化物和胺催化剂的混合物,其中A独立地为亚烷基,亚烯基,亚炔基,亚烷基,亚环烷基或芳亚烯基; m为0〜30的整数; R 1,R 2和R 3独立地是任选取代的芳烷基或聚芳烷基; 且R 4为烷基,烯基,炔基,环烷基或任选取代的芳烷基或多芳基烷基。
摘要:
Modified polyisocyanates having an NCO group content of from 10 to 45% by weight, comprising a a) a polyisocyanate component consisting essentially of an organic polyisocyanate having an NCO group content of from 15 to 50% by weight which is liquid at room temperature, and b) 2 to 100% by weight, based on the weight of component a), of a polymer modifier consisting of at least one graft rubber which is dispersed in swollen form in component a), and a process for the production of the new modified polyisocyanates are described. The modified polyisocyanates are also useful in the production of plastics by the isocyanate polyaddition process.
摘要:
Thermoplastically moldable, biodegradable, starch-containing polymer blends consisting essentially ofA) 100 parts by weight of anhydrous starch,B) from 0.1 to 70 parts by weight of polyurethane containing urea groups and based on selected starting materials,C) from 0.5 to 70 parts by weight of a plasticizer component andD) from 2 to 20 parts by weight of water,a process for producing these blends by mixing the individual components in plastics processing machines and their use for producing moldings, films, fibers, coatings or laminates by thermoplastic processing.