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7504475 |
Process for a two stage melt polymerization for the production of polybenzimidazole
A process is presented for the production of high molecular weight polybenzimidazole, in two steps. Step one: provide a first reaction vessel and charge it with at least one aromatic hydrocarbon...
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7465781 |
Method for making polybenzobisoxazole containing polymer
A method of making polybenzobisoxazole containing polymer by use of a non-polybenzobisoxazole polymer, hydroxylating the polymer, forming a solidified polymer and heating the solidified polymer...
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7408018 |
Elastomeric functional biodegradable copolyester amides and copolyester urethanes
The invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers are based on α-amino acids and possess physical, chemical...
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7388035 |
Method for preparing poly(2,5-benzimidazole)
A method for preparing poly(2,5-benzimidazole) whereby 3,4-diaminobenzoic acid is polymerized using a dehydrating reagent containing P 2 O 5 and CX 3 SO 3 H where X is H or F. The...
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7314906 |
High molecular weight stereoregular head-tail poly(glucaramides)
A method of producing high molecular weight stereoregular head, tail-poly(alkylene D-glucaramides) is described. Amidoamino acids are esterified in cold alcohol and then polymerized in a protic...
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7294672 |
Method to form polymeric materials by reverse suspension/emulsion polymerization and compositions formed using that method
A method to form a polymeric material is disclosed. The method provides a water immiscible solvent and one or more condensation monomers, where those one or more condensation monomers are...
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7230067 |
Masterbatch and production method of oxygen-absorbing molded article
In the present invention, a masterbatch is produced by melt-mixing a metal compound (B) with a reactive thermoplastic resin (C). The oxidizable polyamide (A) is produced by polycondensing a diamine...
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7148269 |
Interfacial polymer incorporation of nanotubes
A method for producing a composite material containing nanotubes and an interfacial polymer, and a composite material made by the method. The method involves contacting two mutually insoluble...
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7138482 |
Production method of polyamide
In the production method of polyamide of the present invention, the mole balance at a set point during melt polymerization is estimated from a pre-established equation for calculating the mole...
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7122618 |
Quaternary polyamidoamines, the production thereof, corresponding agents and the use thereof
The present invention relates to quaternized polyamidoamines which have at least one structural unit of the formula VII
in which R 1 , R 2 , R 4 are straight-chain or branched organic...
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7091306 |
Process for preparing polyalkenylsuccinimides
The present invention relates to an improved process for preparing polyalkenylsuccinimides having a sediment level less than 0.1 vol % comprising the steps of:
(a) preparing a polyalkenyl...
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7078477 |
Process for producing solvent-soluble polyimide
In the process of the present invention, a solvent-soluble polyimide is produced by polycondensing at least one tetracarboxylic acid component with at least one diamine component in a solvent in...
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7060782 |
Process for a two stage melt polymerization for the production of polybenzimidazole having an improved solid state polymerization
A process for the production of high molecular weight polybenzimidazole by one: providing a first reaction vessel; charging the reaction vessel with at least one aromatic hydrocarbon tetraamine,...
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7057008 |
Packaging and containers made of water-soluble polyamides and processes for their manufacture
Packaging materials made from water-soluble nylons are disclosed, that readily contain materials such as caustic chemicals and upon exposure to water dissolve to provide for the release of the...
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7053172 |
Fuel-barrier polyamide resin and multilayer shaped article
The fuel-barrier polyamide resin of the present invention is a product of the polycondensation of a diamine component comprising 70 mol % or higher of m-xylylenediamine and a dicarboxylic acid...
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7053171 |
Production method of polyamide
In the production method of the present invention, the polyamide is produced by the polycondensation of a diamine component and a dicarboxylic acid component comprising a straight-chain...
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7053169 |
Polyamide molding compounds for producing optical lenses
The invention relates to new thermoplastically processible transparent polyamide molding materials based on copolyamides containing diamines and dicarboxylic acids with aromatic cores which exhibit...
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7038007 |
Process for a continuous polymerization for the production of high molecular weight polybenzimidazole
A process for a single-stage melt polymerization for the production of a high molecular weight polybenzimidazole which comprises the steps of: providing a reaction vessel having a means for...
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7038006 |
Polyamide and resin composition
A polyamide obtained by polycondensation of a diamine component containing at least 50 mol % of 2-methyl-1, 5-pentanediamine and a dicarboxylic acid component containing at least 50 mol % of...
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7026435 |
Water-dispersible, hydrophobic polyalkyleneimine polyamide fiberglass lubricant, process for producing the same, and method of use therefor
Polymer derivatives based upon polyalkyleneimine backbones having from about 20% to about 60% of their reactive amino functionalities substituted by C 14-20 carboxylic acids, are disclosed. Fiber...
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7009030 |
High-melting wax useful for sintering metals
A wax containing the reaction product of: (a) a C 6 –C 12 linear dicarboxylic acid; and (b) a diamine of formula H 2 N(CH 2 ) n NH 2 , wherein n is an integer from 2 to 6, and the molar ratio of...
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7009029 |
Polyamide composition
Provided is a polyamide composition comprising 100 parts by weight of (A) a polyamide having dicarboxylic acid units containing 60 to 100 mol % of terephthalic acid units, and diamine units...
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6995233 |
Process for manufacturing polyamides
The invention relates to a continuous process for manufacturing polyamides. The polyamides are of the type obtained from diacids and diamines. The process comprises an operation of continuous...
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6958381 |
Polyamide
A process for preparing polyamides comprises polymerizing starting monomers in the presence of from 2.3 to 10 mmol, based on 1 mol of carboxamide group of the polyamide, of a chain regulator...
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6956099 |
Polyamide-polyether block copolymer
Copolymers having linked internal polyether blocks and internal polyamide blocks have advantageous physical properties and solvent-gelling abilities. The copolymer may be prepared from a reaction...
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6943231 |
Transparent polyamide molding materials having improved transparency, resistance to chemicals and high permanent fatigue strength
Transparent polyamide molding materials are provided which are characterized in that they have a melting enthalpy between 0 and 12 J/g and the polyamides are constituted of 100 mole-% of a diamine...
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6930165 |
Modified polyamides, compositions based on same and macromolecular compounds used to obtain them
The invention concerns polyamides modified by a multifunctional compound. Finished articles formed from said polyamides or from compositions based on said polyamides exhibit excellent mechanical...
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6916901 |
Production of polyamide
The present invention provides a method for the production of polyamide 6 by the hydrolytic polymerization of ε-caprolactam, in which, in the first step, caprolactam ring opening occurs under the...
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6906165 |
Copolyamides and compositions based on same
The invention concerns copolyamides obtained by using multifunctional monomers. It consists in using a multifunctional monomer comprising at least three reactive functions and at least another...
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6894135 |
Method for preparing high molecular weight random polyhydroxypolyamides
High molecular weight random polyhydroxypolyamides (PHPAs) are produced by creating prepolymers which are further polymerized. Random prepolymers are formed from a stoichiometrically molar balance...
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6887400 |
Water-soluble polyaminoamides comprising 1,3-diimines as sunscreen agents
A UV-protective composition comprising a water-soluble polyaminoamide containing 1,3-diimine groups, wherein the polyaminoamide containing 1,3-diimine groups absorbs ultraviolet light radiation...
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6881477 |
Method for producing a polyamide compound
A method is disclosed for producing a polyamide molding compound which includes the following method steps: addition and dissolving of m-xylylene diamine and dicarboxylic acids, which include...
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6872800 |
Hyperbranched copolyamide, composition based on said hyperbranched copolyamide and method for obtaining same
The invention relates to hyperbranched copolyamides (HBPAs), to their production and to their use as additives, in particular as melt viscosity modifiers in thermoplastic polymer compositions. ...
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6864354 |
Modified polyamides, polyamide compositions, and method for making same
The invention relates to modified polyamides, and more particularly to polyamides containing units of the type obtained by reacting a diacid with a diamine, modified with a multifunctional...
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6841651 |
Polyamide resin
The polyamide resin of the present invention is produced by polycondensation of a diamine component comprising 70 mol % or more of m-xylylenediamine and a dicarboxylic acid component comprising 70...
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6835800 |
Nylon copolymers containing dimeric acid comonomers
A method for preparing a nylon 6 copolymer containing dimeric acid comonomers. The method includes reacting 80.0˜99.9 mol % of caprolactam, 0.1˜3.0 mol % of dimeric acid and 0.1˜3.0 mol % of...
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6828413 |
Process for the preparation of a polyamide
The invention relates to a process for the preparation of a polyamide comprising at least a step in which a composition that comprises at least (a) a primary aminocarbonamide and (b) an...
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6812324 |
Method for preparing nylon 6 copolymer containing sulfonate comonomers
A method for preparing nylon 6 copolymer containing 5-sulfoisophthalate salts comonomer. The method includes the steps of reacting 5-sulfoisophthalate salts ester with aliphatic diamine in a molar...
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6812323 |
Inherently light- and heat-stabilized polyamides with improved wet fastness
A process for preparing polyamides comprises polymerizing starting monomers or starting oligomers in the presence of at least one compound of the formula (I) where R is a functional group R 8 ...
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6812322 |
Polyamide
A process for the preparation of novel polyamides, the use of such polyamides for the production of fibers, sheets and moldings, and fibers, sheets and moldings obtainable from such polyamides, are...
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6780963 |
Molding material for electrical and electronic parts
The polyamide resin composition of the invention is characterized by having a solder reflow heat-resistant temperature of not lower than 250° C. Since the polyamdie resin composition has low water...
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6774208 |
Friction heat, cryogenic quench solid state polymerization
A two step method for solid state polymerization of dry crystalline thermoplastic polymers to form polymers with superior mechanical properties, first by mechanically fluidizing dry crystalline...
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6774205 |
Polyamides
A process for the preparation of novel polyamides, the use of such polyamides for the production of fibers, sheets and moldings, and fibers, sheets and moldings obtainable from such polyamides, are...
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6759505 |
Single-phase or multi-phase continuous polyamide polymerization processes
There is provided a process for the continuous polymerization of polyamides which is carried out under conditions of pressure, temperature and polymer concentration in water that will ultimately...
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6750318 |
Polyamide resins and process for producing the same
The polyamide resin of the present invention is produced by the polycondensation of a dicarboxylic acid component and a diamine component containing xylylenediamine and bisaminomethylcyclohexane in...
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6750317 |
Material and additive for highly crosslinked chemically and thermally stable polyhydroxyamide polymers
Polyhydroxyamides are polymerized to form highly-crosslinked, temperature-stable polymers. The polyhydroxyamides include as their central, parent structure a benzenetricarboxylic acid to which side...
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6747120 |
Copolyamide based on tetramethylene terephthalamide and hexamethylene terephthalamide
The invention relates to a semi-aromatic polyamide containing at least tetramethylene terephthalamide units and also hexamethylene terephthalamide units. The copolyamide has a melting point higher...
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6703475 |
Method for the continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III)
A process for continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III) comprises reacting a mixture (IV) comprising a diamine (II), a dicarboxylic...
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6699960 |
Method for producing polyamides from dinitriles and diamines
A polyamide is prepared by reacting at least one dinitrile and at least one diamine with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 50*10 6 Pa in a molar ratio of at...
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6693163 |
Solid-phase drying and solid-phase polymerization of polyamide
In the method for solid-phase drying or solid-phase polymerizing a polyamide of the present invention, the polyamide that is stored for 20 days or longer after the production thereof until...
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