摘要:
Starch hybrid copolymers in the form of aqueous dispersions or water-redispersible powders, processes for producing and uses for the same. Where the starch hybrid copolymers obtainable by radically initiated polymerization in aqueous medium of ethylenically unsaturated monomers in the presence of starch or by emulsion polymerization, in aqueous medium of ethylenically unsaturated monomers in the presence of starch. The starch hybrid copolymers may also be obtainable by performing an optional subsequent drying process.
摘要:
A water-based barrier coating composition suitable for use as a barrier coating is disclosed which includes an aqueous polymer composition obtainable by free radical (co)polymerizing an ethylenically unsaturated monomer blend having an optionally substituted styrene, at least one C1-C4-alkyl (meth)acrylate, other ethylenically unsaturated copolymerizable monomers, degraded starch polyvinyl alcohol (PVA), a plasticizer; a composition having C16-C18 alkenyl ketene dimer, optionally as a mixture with rosin, of a gelling agent; and optionally a filler.
摘要:
The invention relates to an aqueous polymer dispersion having a viscosity of ≤150 m Pas at 40% solids content and comprising polymer particles having a particle size D50 less than 85 nm. The polymer dispersion is obtainable by free radical emulsion copolymerisation of at least monomer (a) and monomer (b), where monomer (a) is at least one optionally substituted styrene and monomer (b) is at least one C1-C4-alkyl (meth)acrylate, in a reaction mixture comprising degraded starch which has an average molecular weight Mn
摘要:
Superabsorbent polymer products for use in agricultural applications, and methods of making the same, are provided. The superabsorbent polymer is used in a seed coating along with an active ingredient, and optionally a singulating substance, to improve seed germination and/or blooming; improve germination under dry conditions; decrease irrigation requirements; increase propagation, crop growth, and crop production; and improve the efficacy of the active ingredient.
摘要:
Preparation of a graft copolymer prepared by reacting a cellulose ester and a mono- or di-ester of maleic or a fumaric acid, thereby obtaining a cellulose derivative bearing a polymerizable double bonding, and then copolymerizing said cellulose derivative with other copolymerizable monomer(s). The invention also includes a coating composition based on thus obtained graft copolymer.
摘要:
Preparation of a graft copolymer prepared by reacting a cellulose ester and a mono- or a di-ester of maleic or fumaric acid, thereby obtaining a cellulose derivative bearing a polymerizable double bonding, and then copolymerizing said cellulose derivative with other copolymerizable monomer(s). The invention also includes a coating composition based on the thus obtained graft copolymer.
摘要:
An object of the present invention is to provide a self-assembly composition for pattern formation, which is capable of forming a favorable phase-separated structure even in the case of forming a large size pattern. In addition, another object of the present invention is to provide a self-assembly composition for pattern formation, which is capable of forming a pattern by a simple process, with no need for preparation of a under layer, etc., upon formation of a fine pattern structure. The present invention relates to a self-assembly composition for pattern formation, which comprises a block copolymer comprising a polymerization unit (a) comprising two or more units consisting of at least one type selected from a glucose unit and a xylose unit, and a polymerization unit (b) comprising two or more units consisting of at least one type selected from an aromatic ring-containing unit, a silicon-containing unit and a metal-containing unit.
摘要:
Disclosed herein are starch stabilized polymeric emulsions. Persulfate salts degrade starch to give it suitable characteristics, and then also, essentially simultaneously, initiate polymerization with monomers. This permits a single reaction condition to be used for both the degradation step and the polymerization step, and avoids the need for use of metallic ions such as iron.
摘要:
A process for producing an amphoteric aqueous polymer dispersion by two-step radical copolymerization includes (a) decomposing a starch by treatment with an enzyme or acid hydrolysis to provide a starch solution composed of decomposed starch and/or derivatives thereof having an average molecular weight ranging from 500 to 2000 g/mole and with the starch solution having an internal viscosity
摘要:
The present invention relates to water-soluble, acid-groups-containing graft copolymers which are at least partially biodegradable and are based on sugars and monoethylenically unsaturated carboxylic acids, sulfonic acids and/or phosphonic acids or the salts of said acids as well as optional further monomers. The present invention further relates to a process for producing the graft copolymers at temperatures of up to 200.degree. C. by means of radical polymerization initiators, in that a total mixture of 5-60%-wt. mono-, di- and oligosaccharides, the derivatives thereof or the mixtures thereof, and 95-40%-wt. of a monomer mixture comprising at least one monoethylenically unsaturated carboxylic acid, at least one monoethylenically unsaturated sulfonic acid, one monoethylenically unsaturated sulfuric acid ester and/or vinylphosphonic acid or the salts of said acids with monovalent cations, as well as optional further monomers is polymerized. The present invention further relates to the use of the graft copolymers in aqueous systems, for binding multivalent metal ions, inhibiting the water hardness, as additive in detergents and cleaning agents, as textile auxiliary, dispersing agent, in particular for pigments, and as auxiliary agent in the production of paper and leather.