摘要:
The invention describes a composite in which solar cells can be encapsulated, being a photovoltaic module, composed of the following elements: an outer layer made of a transparent thermoplastic and/or a barrier foil, and an elastic layer into which the solar cells have been embedded and a barrier foil or a barrier sheet.
摘要:
Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.
摘要:
A clear impact resistant molding compound which does not become cloudy under either the influence of heat or moisture or on weathering and is composed according to the invention of:A) 10 to 90 percent by weight of a continuous rigid phase, essentially of methyl methacrylate, having a glass transition temperature greater than 70.degree. C. andB) 90 to 10 percent by weight of an elastomeric phase, distributed in the rigid phase and partly bound thereto, having a glass transition temperature below -10.degree. C., an average particle size of the elastomeric phase below 130 nm, and an inhomogeneity, U, of the elastomeric phase particle size of less than 0.5, comprising at least 50 percent by weight of B) of a lower alkyl acrylate and 0.5-5 percent by weight of a graft cross linking agent or an at least trifunctional cross linking agent,C) not more than 0.05 percent by weight of water soluble components,where U=D.sub.w.sup.3 /D.sub.n.sup.3- 1 D.sub.w and D.sub.n are, respectively the weight average- and number average-values of the particle size,films prepared from such a molding compound;multilayer shaped bodies wherein at least one layer is of such a molding compound;methods for making such molding compounds, films, and shaped bodies.
摘要:
An emulsion polymer having at least three phases, adaptable as an agent for modifying the impact resistance of rigid thermoplastic synthetic resins such as polymethyl methacrylate, and consisting ofA) a rigid core phase of a crosslinked homo- or copolymer,B) an elastomer phase, prepared in the presence of the core material and having a glass transition temperature not above -10.degree. C., comprising a crosslinked resin which includes an arylalkyl acrylate or arylalkyl methacrylate, andC) a rigid shell phase, prepared in the presence of the elastomer phase, having a glass transition temperature of at least 50.degree. C.
摘要:
An impact resistance modifier for polycarbonate, which is a copolymer, comprising an elastomer and a methyl methacrylate copolymer, which are bonded covalently. The methyl methacrylate copolymer is one that is compatible by itself with polycarbonate resin due to specific comonomers. Such comonomers are aromatic (meth)acrylic esters and (meth)acrylamides, cycloalkyl(meth)acrylamides and cycloalkylmaleimides. Thermoplastic molding compounds comprising polycarbonate and the new impact resistance modifier exhibit excellent impact resistance.
摘要:
Multi-layer plastic elements containing a polycarbonate core, with a polymethacrylate layer containing a UV absorber, and modified to be impact-resistant, applied to the core, where the polymethacrylate plastic layer is composed of methacrylate copolymers, which form compatible mixtures with polycarbonate, especially the polycarbonate of bisphenol A, exhibit good adhesion between the polycarbonate and the polymethacrylate. The methacrylate copolymers are methyl methacrylate copolymers with (meth)acrylic monomers which contain carbocyclic substituents in the ester group. The protective layer containing UV absorber is applied to the polycarbonate plastic in thickness from 1 to 500 .mu.m by coextrusion or by lacquering.
摘要:
A thermoplastic polymethacrylate molding material with a high degree of thermal dimensional stability, a high degree of transparency, a high degree of flowability and a high degree of resistance against water, monomeric methylmethacrylate, mixtures consisting of ethanol and water, as well as fuel, wherein the molding material is a compatible mixture of1 to 99 wt % of a copolymer P, made from (p1) 30 to 70 wt % styrene and/or .alpha.-methylstyrene, (p2) 29 to 70 wt % (C.sub.1 -C.sub.6 -alkyl)methacrylate, and (p3) 1 to 20 wt % acrylic acid and/or methacrylic acid, the sum of (p1), (p2), and (p3) adding up to 100 wt %, and99 to 1 wt.-parts of a polymethylmethacrylate polymer PM, made of (pm1) 80 to 100 wt % methylmethacrylate, as well as (pm2) 0 to 20 wt % monomers which can be copolymerized with methylmethacrylate.
摘要:
Polymethacrylimide polymers poor in amide or N-alkylamide groups and in carboxyl and carbonic acid anhydride groups are obtained by heating a copolymer consisting of 1 to 60 mol percent of methacrylamide or/and an N-alkyl-methacrylamide and 40-99 mol percent of an alkyl methacrylate or/and phenyl methacrylate in an aliphatic monoalcohol.
摘要:
Polymer blends comprising:(A) 99.5-0.5 wt. % of a copolymer comprising:a1) 50-99 wt. % of C.sub.1 -C.sub.10 -alkyl- or C.sub.5 -C.sub.8 -cycloalkylethacrylates or mixtures thereof,a2) 0.5-20 wt. % of maleic acid anhydride or fumaric acid anhydride or maleimide, anda3) 0.5-40 wt. % of vinyl aromatics which may be unsubstituted or substituted on the aromatic ring with 1 or 2 alkyl groups of 1 to 4 carbon atoms; and(B) 0.5-99.5 wt. % of a copolymer comprising:b) 99.5-50 wt. % of styrene and/or .alpha.-methyl styreneb2) 0.5-50 wt. % of acrylonitrile and/or methacrylonitrile;provide thermoplastic transparent molding compositions.
摘要:
Polymer blends comprising:(A) 99.5-0.5 wt. % of a copolymer comprising:a1) 50-99 wt. % of C.sub.1 -C.sub.10 -alkyl- or C.sub.5 -C.sub.8 -cycloalkylmethacrylates or mixtures thereof,a2) 0.5-20 wt. % of maleic acid anhydride or fumaric acid anhydride or maleimide, anda3) 0.5-40 wt. % of vinyl aromatics which may be unsubstituted or substituted on the aromatic ring with 1 or 2 alkyl groups of 1 to 4 carbon atoms; and(B) 0.5-99.5 wt. % of a copolymer comprising:b1) 99.5-50 wt. % of styrene and/or .alpha.-methyl styreneb2) 0.5-50 wt. % of acrylonitrile and/or methacrylonitrile;provide thermoplastic transparent molding compositions.