539 results about "Styrene maleic anhydride" patented technology

A halogen-free resin composition includes (A) 100 parts per hundred resin of epoxy resin; (B) 1 to 100 parts per hundred resin of benzoxazine resin; (C) 1 to 100 parts per hundred resin of styrene-maleic anhydride; (D) 0.5 to 30 parts per hundred resin of amine curing agent; and (E) 5 to 150 parts per hundred resin of halogen-free flame retardant. The composition obtains properties of low dielectric constant, low dissipation factor, high heat resistance and flame retardancy by specific composition and ratio. Thus, a prepreg or a resin film, which can be applied to a copper clad laminate and a printed circuit board, is formed.

The invention provides halogen-free resin composition, and a copper clad laminate and a printed circuit board applying the halogen-free resin composition. The halogen-free resin composition comprises, by weight, (A) 100 parts of epoxy resin, (B) 1 part -100 parts of benzoxazine resin, (C) 1part -100 parts of styrene maleic anhydride, (D) 0.5 part -30 parts of amine curing agents, and (E) 5-150 parts of halogen-free flame retardants. By means of the specified constituents and ration, the halogen-free resin composition achieves the purposes of low dielectric constant, low dielectric loss, high heat resistance, and high flame resistance, can be manufactured into semi-solidified rubber pieces or resin films, and then achieves the purposes of being applied to the copper clad laminate and the printed circuit board.

The present invention relates to compositions comprising blends of alkenyl aromatic polymers such as styrenic polymers (i.e. PS and HIPS) and bio-based or biodegradable polymers (i.e. PLA, PGA, PHA, PBS, PCL) compatibilized with styrene-based copolymers (i.e. styrene-ethylene-butylene-styrene (SEBS) block copolymers, maleated SEBS, styrene-maleic anhydride (SMA) copolymer, styrene-methyl methacrylate (SMMA) copolymer) or a mixture of two or more styrene-based copolymers such as SEBS and SMA. These novel compositions can be extruded and thermoformed to produce very low density food service and consumer foam articles such as plates, hinged lid containers, trays, bowls, and egg cartons with good mechanical properties.

Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.

The invention provides a halogen-free resin composition which comprises (A) 100 parts of cyanate ester resin, (B) 5-50 parts of styrene maleic anhydride, (C), 5-100 parts of polyphenyl ether resin, (D) 5-100 parts of maleimide resin, (E) 10-150 parts of nitrogenous compound, and (F) 10-1000 parts of inorganic filler. As the composition comprises components in special proportion, the halogen-free resin composition is low in dielectric constant, low in dielectric loss, high in heat resistance and high in flame resistance. The halogen-free resin composition can be prepared as a semi-cured film or a resin film, so that the composition can be applied to a copper foil substrate and a printed circuit board.

The invention discloses a method for copolymerization of maleic anhydride/conjugated diene, relating to the field of high polymer self-stable precipitation polymerization. The invention comprises the following steps: under the protection of nitrogen, adding the monomer maleic anhydride and initiators into medium to dissolve fully; after that, adding the monomer conjugated diene into the system, dissolving, and reacting for 0.5-73h at 50-90 DEG C to obtain a disperse system of copolymer microspheres of the maleic anhydride and the conjugated diene; then obtaining a white solid of the copolymer of the maleic anhydride and the conjugated diene through centrifugation and vacuum drying. The invention has the advantages of simple process, simple post-treatment to the synthesized copolymer, low cost, environmental friendliness, etc.

The invention provides a copolymer containing a functional group and prepared by a C5 mixture and maleic anhydride and a preparation of the copolymer, belonging to the field of applications of C5 resource. The preparation method comprises the following steps of: adding monomer maleic anhydride and initiator azobisisobutyronitrile (AIBN) into ester medium under the protection of nitrogen, dissolving completely, adding C5 mixture into the system, and dissolving, wherein the mol ratio of the maleic anhydride and the C5 is 1:1, reacting for 0.05-7 hours at 50-90 DEG C so as to obtain a milky and stable solid-liquid disperse system of the copolymer of C5 and maleic anhydride, centrifugally separating and drying at vacuum condition so as to obtain the white solid powder of copolymer of C5 and maleic anhydride. According to the invention, the C5 mixture is directly used as the raw material to prepare the highly crosslinked copolymer containing the functional group in one-step reaction, in this way, the C5 resource is used reasonably and effectively.

The present invention provides a composition of the modified maleic anhydride and the epoxy resins, including (A) one or more of the epoxy resin mixtures, (B) a modified maleic anhydride copolymer, (C) additives and (D) inorganic filler materials, wherein component (A) the epoxy resin mixture accounts for 35%˜56% by weight of the composition solids, component (B) the modified maleic anhydride copolymer accounts for 44%˜65% by weight of the composition solids, based on 100% by weight of total components (A), (B) and (C). According to the present invention, the modified maleic anhydride copolymer curing agent is prepared by reacting styrene/maleic anhydride copolymer with a modifier having hydroxy groups (OH), wherein the modifier having hydroxy groups (OH) can be a brominated, phosphorus-based or halogen-free material; the epoxy resin composition of the present invention shows good heat resistance and outstanding electrical properties, is suitable for the production of prepreg material, bonding films and copper clad laminates, thus can be used in the field of the general or high-frequency printed circuit boards.

The invention concerns a method for obtaining an aqueous dispersion of hydrophobic polymers dispersed in the form of particles with mean diameter less than 100 nm stablized soley with a macromolecular surfactant based on low molecular weight styrene/maleic anhydride imide copolymer. The invention also concerns the use of said dispersion for treating and sizing paper.

The invention discloses a preparation method for antistatic super hydrophobic composite coating, comprising the following steps: dissolving 0.2-2 parts of styrene-maleic anhydride alternate copolymer by weight into 20-1000 parts of solvent by weight, adding 1 part of carbon nanotube by weight and then evenly mixing, adding 0-26 parts of ammonia water and 0.2-2 parts of silicate ester or titanate compound by weight, stirring and mixing to enable silicate ester or titanate compound to perform hydrolysis reaction, adding 0.1-2 parts of silicate ester or titanate compound and 0.02-0.5 part of fluorine containing silane coupling agent by weight, evenly mixing and spraying on base materials, carrying out aging and thermal treatment to obtain stable antistatic super hydrophobic composite coating. The invention has simple operation and mild condition, the carbon nanotube can be directly used without the need of any chemical modification, the obtained composite coating has good hydrophobicity,the static contact angle and rolling angle between the composite coating and water are respectively larger than 150 degrees and less than 3 degrees, and the surface resistivity is 106-1011 omega, thus meeting the requirement of antistatic transparent coating and having wide application prospect.

A powder coating composition includes an acid-functional polyester resin and a matting agent selected from styrene-maleic anhydride copolymers and acid-functional acrylic resins. The compositions provide low gloss finishes at low curing temperatures, as well as consistent gloss over a wide range of curing temperatures.

The invention relates to a functional copolymer directly prepared from higher olefin mixture and a preparation method, and belongs to the field of application of petroleum resources. The preparation method includes: under the condition of nitrogen protection, adding one or more of MAH (maleic anhydride), maleimide and derivatives thereof and itaconic anhydride as well as oil soluble free radical initiator into selected solvent to be fully dissolved, then adding one or more of C8 and C9 fraction and light fraction of coal tar into the system to be mixed evenly, performing reaction at the temperature of 60-120 DEG C, and after reaction is finished, performing separating and drying to obtain the functional copolymer formed by copolymerization of olefin components and maleic anhydride in the mixture. C8 and C9 fraction and light fraction of coal tar are taken raw materials directly to be subjected to one-step reaction for preparing the copolymer comprising functional radicals, the process is simple, reaction conditions are mild, preparation efficiency is high, the prepared copolymer and non-polymerization components are easy to separate, the copolymer is high in functional radical content, and resources of C8 and C9 fraction and light fraction of coal tar can be utilized reasonably and effectively.

The invention relates to a production method of abietic maleic anhydride resin, comprising the following two reaction steps of: 1, carrying out addition reaction on abietyl and maleic anhydride to generate an abietic maleic anhydride addition product; and 2, carrying out esterification reaction on the abietic maleic anhydride addition product and pentaerythritol to generate the abietic maleic anhydride resin. The production method is easy and convenient to operate, has the advantages of large temperature control range, high operability, small investment and stable product quality and is a method suitable for industrialized production; in the production method, appropriate process conditions including raw material proportion, reaction temperature, reaction time, catalysts, and the like, are adopted, thereby the acid value and the molecular weight range of a resin product can be effectively controlled; in addition, the resin product obtained with the production method has higher acid value of 150-170 mg KOH/g, reasonable softening point at 140-155 DEG C and good water solubility and is suitable for producing water-based ink, and a formed coating film has toughness and better after-tackiness resistance, water resistance and alkali resistance.

Compositions comprising acid salts of amine-functionalized styrene-maleic anhydride resins are disclosed. The salts can be dissolved in organic solvents, UV/EB polymerizable monomers and/or oligomers, and/or water and act as a polymeric surfactants to disperse pigments or fillers, emulsifying agents, or hard resin additives in a variety of formulations. The compositions react under UV/EB cure conditions, and provide enhanced properties such as cure speed, hardness and adhesion to polymer compositions.

The invention discloses an electrophoresis-displaying microcapsule and its preparing method, which recondenses hydrolysate of styrene-maleic anhydride copolymer and glutin to prepare the microcapsule. By the proper technique, it firstly emulsifies the encapsulated matter in the styrene-maleic anhydride copolymer solution, adds in the gultin, and then recondenses them by adding acid and/or water. Its advantages: provision of synthetic high-molecular styrene-maleic anhydride copolymer overcomes the disadvantage that the natural gum Arabic high molecule is easy to degrade so as to affect performance of the microcapsule, and reduces the cost. And by proper technique, it can prepare circular microcapsules which are stable, sealed and have more uniform particle size distribution.

Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.