摘要:
Hydrophilic silicone copolymers are the addition polymerization product of an unsaturated silicone macromer, and unsaturated polyoxyalkylene polyether, and optionally further unsaturated addition polymerizable monomers.
摘要:
A contact transparent single layer or multilayer film absorbing and/or reflecting UV radiation and short-wavelength visible light is disclosed. The film comprises at least one layer based on at least one optionally modified thermoplastic olefin homo- or co-polymer, comprising a combination of at least one organic or inorganic colored pigment or dye absorbing and/or reflecting short-wavelength visible light, and of at least one organic or inorganic compound absorbing and/or reflecting the UV radiation. The film disclosed herein can be used as a protective film against the effects of UV radiation and short-wavelength visible light, and a sewer cleaning system comprising said multilayer film as an external hose film and an inner, multilayer plastic film, and an impregnated UV-curable carrier material present between the two hose films.
摘要:
The present invention relates to a predominantly biodegradable double-separating film and comprising at least one carrier layer (a) that is based on at least one biodegradable polymer, and at least one release layer (b) that is based on at least one cured polysiloxane. The curing of said release layer is based, at least partially, on at least one cross-linked monomer or oligomer additive. Said additive also promotes adhesion between the carrier layer (a) and the release layer (b), and has no siloxane groups but does have at least two functional groups, of which at least one is a functional group with at least one carbon double bond. No adhesion-promoting layer is present between the carrier layer (a) and the release layer (b). In addition the invention relates to the use of such a separating film as a removable protection and cover film.
摘要:
Polymer dispersions of polymers derived from silicone macromers and ethylenically unsaturated monomers are capable of incorporating large amounts of chemically bonded macromer, when the silicone macromer and part of the unsaturated monomer are polymerized in aqueous medium as an initial charge with an oil soluble initiator, and the remaining monomers are fed in and polymerized using a water soluble initiator. The dispersions may be dried to form water redispersible polymer powders.
摘要:
Silicone-modified polyvinyl acetal copolymers are prepared by copolymerization of at least one vinyl ester monomer and a copolymerizable silicone macromer followed by hydrolysis to a partly or fully hydrolyzed polyvinyl alcohol copolymer and subsequent acetalation with at least one aldehyde. The copolymers have numerous uses in sectors where polyvinyl acetals are useful.
摘要:
Non-blocking solid vinyl ester copolymer resins have at least two different glass transition temperatures and are prepared by free-radical bulk or solution polymerization of 1. a) 50% to 97 % by weight of one or more comonomers M1 selected from vinyl esters of optionally branched C1-15 alkylcarboxylic acids and optionally alpha-olefin(s), monomers M1 producing homopolymers with a Tg 50° C., wherein respecting the copolymerization of comonomers M1 with comonomers M2, the copolymerization parameters r1 2.0, and wherein some or all of comonomers M2, and at least 3% by weight are introduced before the start of the polymerization.
摘要:
Silicone-containing polymers having numerous uses are prepared by polymerizing one or more ethylenically unsaturated monomers in the presence of a branched organopolysiloxane having at least one lipophilic branched siloxane portion and at least one optionally branched hydrophilic portion.
摘要:
The invention relates to a method for producing polyvinylacetals that can be obtained by saponifying a vinylester polymer and subsequently acetalizing the polyvinyl alcohol, which is obtained therewith, with one or more aldehydes selected from the group consisting of aliphatic and aromatic aldehydes having 1 to 15 C atoms, whereby: a) the polyvinyl alcohol is present in an aqueous medium; b) a pH value of
摘要:
A transparent multi-layered film arrangement comprising at least three layers, wherein the film arrangement comprises one layer is made of a biodegradable polylactic acid (PLA) and a polyglycol as plasticizer, said polyglycol having a molecular weight of between 35,000 and 4,000,000, and at least two outer layers, each of said two outer layers being made of PLA.
摘要:
Protective-colloid-stabilized polymers in the form of their aqueous dispersions or of their water-redispersible powders are based on homo- or copolymers of one or more monomers from the group consisting of vinyl esters of optionally branched alkyl carboxylic acids having from 1 to 15 carbon atoms, (meth)acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes, and vinyl halides, wherein partially hydrolyzed vinyl acetate-ethylene copolymers with an ethylene content of from 1 to 15 mol %, a degree of hydrolysis DH of the vinyl acetate units of 80 mol %