摘要:
An object of the present invention is to provide an adhesive for solar battery back sheets, which has satisfactory initial adhesion to a film after aging, high adhesion at high temperature, and sufficient hydrolysis resistance over a long time, and is also excellent in total valance. Another object is to provide a solar battery back sheet and a solar cell module, which are obtainable by using the adhesive. Disclosed is an adhesive for solar battery back sheets obtainable by mixing (A) a urethane prepolymer having an isocyanate group at the end with (B) a polyol, wherein the urethane prepolymer (A) is obtainable by a reaction of a hydroxyl group-containing compound with an isocyanate compound, and the hydroxyl group-containing compound comprises a polycaprolactone polyol. The adhesive for solar battery back sheets has satisfactory initial adhesion to a film after aging, high adhesion at high temperature, and sufficient hydrolysis resistance over a long time, and is also excellent in total valance.
摘要:
The invention relates to stable emulsions for the production of foams based on isocyanates, comprising at least three polyols A1a, A1b and A1c and at least one physical blowing agent T, wherein A1a is a polyether polyol, obtained by the addition of epoxies to starter compounds selected from carbohydrates and difunctional or higher-functional alcohols, A1b is a polyether polyol started on an aromatic amine and A1c is a polyester polyether polyol, obtained by the addition of epoxies to the esterification product of an aromatic dicarboxylic acid derivative and a difunctional or higher-functional alcohol. The invention further relates to a method for producing foams by reactions of such emulsions with isocyanates and to the foams obtainable in this way and their use for insulating purposes.
摘要:
The invention relates to a process to manufacture an adhesive layer in an easy to handle process, whereby the adhesive is applied in a molten state to a substrate in an amount to form a layer of 150 to 5000 µm and the adhesive is cured by UV-radiation whereby the adhesive comprises a polyurethane bearing at least one unsaturated curable group in the chain and the radiation source is preferably an UV-LED.
摘要:
The present invention relates to a two part polyurethane and/or polyurethane polyurea hybrid based system for making an elastomeric material, comprising an Iso part having low free monomer and an amine/polyol part, wherein the Iso part comprises a pre-polymer of polyurethane, and wherein the pre-polymer is an MDI based pre-polymer with low free MDI monomer and capped with isocyanate groups from a second relatively higher vapor pressure isocyanate and the pre- polymer contains less than about 0.3% total free monomer and has an NCO% in the range of about 0.1 to about 10%.
摘要:
This invention relates to a resin composition using a dicarboxylic acid diester derivative as a plasticizer, and particularly to a resin composition, which is obtained by adding the plasticizer to one or more resins selected from among aliphatic or aromatic polycarbonate resins, polyurethane resins, polyvinyl chloride resins and epoxy resins, and which has a low glass transition temperature (Tg) and can be easily processed and can impart flexibility to products. This plasticizer exhibits high plasticization efficiency, and a resin composition including the plasticizer can manifest a low glass transition temperature and good flexibility at low temperature, thus improving physical properties such as tensile strength, even when only a small amount of the plasticizer is added.
摘要:
Ein Isocyanat-terminiertes Präpolymer C mit einem NCO-Gehalt von ≥ 26,0 Massen-% bis ≤ 31,0 Massen-%, ist erhältlich aus der Reaktion von einer Isocyanat-Zusammensetzung A mit einer Viskosität bei 25 °C von ≥ 60 mPas und ≤ 800 mPas, umfassend ≥ 25 Massen-% bis ≤ 60 Massen-% MDI und ≥ 40 Massen-% bis ≤ 75 Massen-% pMDI, wobei die Summe der Anteile dieser Komponenten ≤ 100 Massen-% beträgt, mit einem bifunktionellen Polyesteretherpolyol B mit einer OH-Zahl von ≥ 200 mg(KOH) / g und 500 mg(KOH) / g, erhalten aus der Reaktion einer Dicarbonsäure/Dicarbonsäurederivat mit mindestens einem Polyol sowie mit einem Epoxid, wobei das Polyesteretherpolyol B in Gehalten von ≥ 1,5 Massen-% bis ≤ 6,0 Massen-%, bezogen auf die Summe der Massen von A und B, eingesetzt wird. Weitere Gegenstände der Erfindung sind ein aus dem Präpolymer C hergestelltes PUR/PIR-Polymer, dessen Verwendung sowie hierauf beruhende Verbundelemente.
摘要:
The present invention pertains to a polyurethane with improved abrasion resistance. The reactive component for preparing the polyurethane includes a polybutadiene, wherein the polybutadiene comprises 1,2-butene structure unit, 2,3-(cis) butene structure unit and 2,3-(trans) butene structure unit, wherein the amount of the 2,3-(trans) butene structure unit is more than the amount of the 2,3- (cis) butene structure unit. The polyurethane presented in this invention possesses improved abrasion resistance and good surface quality.
摘要:
A presente invenção está relacionada com processo de obtenção de precursores de poliuretanas, polióis, compreendendo os produtos de sínteses distintas e suas misturas, seguidas de etapas de dissolução e emulsificação de monossacarídeos e/ou dissacarídeos e/ou polissacarídeos e/ou misturas e derivados dos mesmos, e utilização de termoplásticos micronizados. Na presente invenção, estão descritas as reações de polióil com poliisocianato produzindo poliuretana, bem como o polióil obtido quanto a poliuretana obtida da citada reação de polióil com poliisocianato e suas composições, além de produtos obtidos pós-expansão, tais como: embalagens, descartáveis para indústria de alimentos, produtos para a agroindústria, tais como substrato e repositório para mudas, espumas para arranjos florais, filtros industriais, absorventes de produtos químicos, barreiras de contenção de derrames, produtos para pet-shop, como absorventes para urinas de cães e gatos, matéria-prima para produção de filtros cerâmicos e outros.