Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 7. Отображено 7.
13-07-2017 дата публикации

ETCH RESISTANT ALUMINA BASED COATINGS

Номер: US20170200615A1
Автор: Juha T. Rantala, Thomas Gadda, Wei-Min Li, David A. Thomas, William McLaughlin, RANTALA JUHA T, GADDA THOMAS, LI WEI-MIN, THOMAS DAVID A, MCLAUGHLIN WILLIAM, Rantala Juha T., Gadda Thomas, Li Wei-Min, Thomas David A., McLaughlin William
Принадлежит:

Method of forming a protective hard mask layer on a substrate in a semiconductor etch process, comprising the step of applying by solution deposition on the substrate a solution or colloidal dispersion of an alumina polymer, said solution or dispersion being obtained by hydrolysis and condensation of monomers of at least one aluminium oxide precursor in a solvent or a solvent mixture in the presence of water and a catalyst. The invention can be used for making a hard mask in a TSV process to form a high aspect ratio via a structure on a semiconductor substrate. 1. A method of forming a protective hard mask layer on a substrate in a semiconductor etch process , comprising the step of applying by solution deposition on the substrate a solution or colloidal dispersion of an alumina polymer , said solution or dispersion being obtained by hydrolysis and condensation of monomers of at least one aluminium oxide precursor in a solvent or a solvent mixture in the presence of water and a catalyst; wherein 1 to 4 alumina precursors are polymerized with a silane precursor in a solvent or combination of solvents to produce a solution or a colloidal dispersion of a silane containing alumina polymer; and wherein the alumina precursor is peptisized with an agent selected from the group of carboxylic acids , alpha-hydroxy carboxylic acids , carboxylic acid salts , beta-diketones , esters , or beta-ketoesters selected from Calkyl groups in which halogen , unsaturated , and aromatic functionalities may be present , in order to produce a stable solution or colloidal dispersion of a polymeric material capable of being applied onto the substrate.2. The method according to claim 1 , wherein said solution or dispersion is being obtained by subjecting said monomers of at least one aluminium oxide precursor to acid or base catalyzed hydrolysis and condensation reactions in a solvent or a combination of solvents in the presence of water to produce a solution or a colloidal dispersion of an ...

Подробнее
Номер записи: 1
03-03-2016 дата публикации

GLYCOLIC ACID POLYMERS AND METHOD OF PRODUCING THE SAME

Номер: US20160060387A1
Автор: Gadda Thomas, Harkonen Mika, Harlin Ali, Pirttimaa Minni
Принадлежит:

Described herein is a feasible, significantly simplified production method that avoids challenging lactonization steps and converts a low molecular weight aliphatic polyester, consisting of hydroxy acids and a comonomer, whose molecular weight has been increased by step-growth polymerization reactions. The molecular weight of the aliphatic polyester, based on comparison of initial and final weight average molecular weights (MM), increased significantly at a rate which permits the use of reactive extrusion to produce high molecular weight aliphatic polyesters in a simple, economically feasible manner. 1. A telechelic polymers of glycolic acid obtained by a process comprising the steps ofproviding glycolic acid;providing a difunctional monomer;subjecting said glycolic acid to condensation polymerization in the presence of said monomer; andcontinuing polymerization to provide a polymeric chain formed by residues derived from glycolic acid and said difunctional monomer.2. The polymers according to claim 1 , comprising at least 5 claim 1 , for example 5 to 250 claim 1 , preferably 6 to 100 claim 1 , in particular 10 to 50 residues of glycolic acid.3. The polymers according to claim 1 , comprising an essentially linear polymeric chain or a branched polymeric chain.4. The polymers according to claim 1 , having a degree of crystallinity of at least 30% claim 1 , preferably at least 40% claim 1 , in particular at least 50%.5. The polymer according to claim 1 , comprising at least 80 mol-% claim 1 , preferably at least 90 mol-% claim 1 , of residues derived from glycolic acid.6. The polymer according to claim 1 , comprising 0.5 to 10 mol-% claim 1 , preferably 1 to 5 mol-% claim 1 , of residues derived from a difunctional comonomer claim 1 , e.g. a hydroxy-terminated comonomer.7. The polymer according to claim 5 , wherein the molar ratio between residues derived from glycolic acid and residues derived from the comonomer is 1000:1 or less claim 5 , for example 500:1 or less ...

Подробнее
Номер записи: 2
09-04-2020 дата публикации

GLYCOLIC ACID POLYMERS AND METHOD OF PRODUCING THE SAME

Номер: US20200109310A1
Автор: Gadda Thomas, Harkonen Mika, Harlin Ali, Pirttimaa Minni
Принадлежит:

Described herein is a feasible, significantly simplified production method that avoids challenging lactonization steps and converts a low molecular weight aliphatic polyester, consisting of hydroxy acids and a comonomer, whose molecular weight has been increased by step-growth polymerization reactions. The molecular weight of the aliphatic polyester, based on comparison of initial and final weight average molecular weights (MM), increased significantly at a rate which permits the use of reactive extrusion to produce high molecular weight aliphatic polyesters in a simple, economically feasible manner. 1. A method of producing a polymer of glycolic acid that comprises polyglycolic acid segments and that avoids glycolide as an intermediate , comprising the steps ofa) producing a telechelic pre-polymer by the steps comprising:providing glycolic acid;providing a difunctional monomer selected from the group consisting of diols, dicarboxylic acids, and dicarboxylic acid anhydrides;subjecting said glycolic acid to polymerization in the presence of a catalyst and said difunctional monomer; andcontinuing polymerization to provide a polymeric chain formed by residues derived from glycolic acid and said difunctional monomer;wherein the weight ratio of the glycolic acid to the total weight of glycolic acid and difunctional monomer is more than 95%; andb) subjecting said telechelic pre-polymer to step growth polymerization in the presence of a comonomer selected from diisocyanates, bisepoxy compounds, dialdehydes, diketenes, phosphoric acid derivatives, and bisoxazolines.2. The method according to claim 1 , wherein production of the telechelic pre-polymer is carried out in an initial solid state at 200° C. or less for a prolonged period of time under reduced pressure claim 1 , followed by a final dehydration claim 1 , the initial polymerization being carried out for a time of less than 36 h and dehydration step being carried out at a time of less than 24 h.3. The method according ...

Подробнее
Номер записи: 3
19-07-2018 дата публикации

Method of producing glycolic acid polymers

Номер: US20180201724A1
Автор: Gadda Thomas, Nurmi Leena
Принадлежит:

Described herein is a feasible, significantly simplified production method that avoids challenging lactonization steps and converts a low molecular weight aliphatic polyester, consisting of hydroxy acids and a comonomer, whose molecular weight has been increased by step-growth polymerization reactions. The molecular weight of the aliphatic polyester, based on comparison of initial and final weight average molecular weights (M/M), increased significantly at a rate which permits the use of reactive extrusion to produce high molecular weight aliphatic polyesters in a simple, economically feasible manner. 3. The method according to claim 1 , wherein polymerization of the corresponding monomers is carried out in an initial solid state at 200° C. or less for a pro-longed period of time under reduced pressure claim 1 , followed by a final dehydration claim 1 , the initial polymerization being carried out for a time of less than 36 h and dehydration step being carried out at a time of less than 24 h.4. The method according to claim 1 , wherein condensation polymerization claim 1 , optionally in combination with a dehydration step claim 1 , is continued until a polymer comprising least 5 residues of glycolic acid is obtained.5. The method according to claim 1 , further comprising preparing glycolic acid homo- or copolymers.6. The method according to claim 1 , wherein the yield of the polymer is more than 80% claim 1 , in particular more than 90%.7. The method according to claim 1 , further comprising preparing glycolic acid homopolymer exhibiting a molecular weight above 30 claim 1 ,000 g/mol.8. The method according to claim 1 , wherein condensation polymerization is carried out at a temperature of 120 to 250° C. claim 1 , optionally in an inert atmosphere or under reduced pressure.9. The method according to claim 1 , wherein condensation polymerisation of glycolic acid is performed at temperatures below the melting point of the product polyglycolic acid claim 1 , in ...

Подробнее
Номер записи: 4
16-10-2014 дата публикации

METHOD FOR PREPARING GLYCOLIDE POLYESTER BY RING OPENING POLYMERIZATION

Номер: US20140309366A1
Автор: Gadda Thomas, Harkonen Mika, Harlin Ali, HEIKKINEN Harri, Nurmi Leena, RÄMÖ Virpi, Ropponen Jarmo, SHAN JUN, Willberg-Keyriläinen Pia
Принадлежит: TEKNOLOGIAN TUTKIMUSKESKUS VTT

The present invention relates to a method for preparation a glycolide polyester by ring opening polymerization characterized in that glycolide monomer with optional co-monomer(s) of cyclic ester(s) is/are subjected to ring opening polymerization in the presence of a dispersion stabilizer and a catalyst, said catalyst being selected for precipitating glycolide homopolymer or copolymer from solvent, said solvent being selected so that the glycolide monomer and the optional co-monomer(s), the dispersion stabilizer and the catalyst are soluble therein but said glycolide homopolymer or copolymer is non-soluble. The present invention further relates to an in situ ring opening polymerizing process product, and to use of said glycolide polyester, and to further processing of said glycolide polyester. 1. A method for preparation a glycolide polyester by ring opening polymerization wherein glycolide monomer with optional co-monomer(s) of cyclic ester(s) is/are subjected to ring opening polymerization in the presence of a dispersion stabilizer and a catalyst , said catalyst being selected for precipitating glycolide homopolymer or co-polymer from solvent , said solvent being selected so that said glycolide monomer and said optional co-monomer(s) , said dispersion stabilizer and said catalyst are soluble therein but resulting glycolide homopolymer or co-polymer is non-soluble.2. The method according to claim 1 , wherein said solvent do not react with the glycolide monomer or optional cyclic ester co-monomer(s) in the polymerization conditions.3. The method according to claim 1 , wherein said co-monomer is selected from the group comprising lactides claim 1 , lactones and mixtures thereof claim 1 , and is most preferably lactide claim 1 , ε-caprolactone claim 1 , pivalolactone claim 1 , β-propiolactone claim 1 , γ-butyrolactone claim 1 , δ-valerolactone claim 1 , γ-valerolacton claim 1 , e or mixtures thereof.4. The method according to claim 1 , wherein said catalyst is a super ...

Подробнее
Номер записи: 5
26-10-2017 дата публикации

Crystalline transition metal oxide particles and continuous method of producing the same

Номер: US20170306511A1
Автор: Gadda Thomas, Rantala Juha
Принадлежит:

Metal oxide particles, preferably crystalline transition metal oxide particles, made via a continuous process comprising application of a voltage across an electrolyte solution. The electrolyte solution includes a transition metal salt dissolved in water, and preferably also includes a compound for increasing the electrical conductivity of the electrolyte. The particles made by the processes disclosed herein, can have sizes in the micrometer or nanometer ranges. The oxide particles can have a variety of uses, including for charge storage devices. As an example, crystalline manganese oxide nanoparticles, and methods for making the same, are disclosed for a variety of uses including lithium ion batteries. 1. A process for making metal oxide particles , in particular crystalline metal oxide particles , comprising the steps of: a) a transition metal salt, and', 'b) a soluble conductivity enhancing compound', 'so as to form an electrolyte solution, the electrolyte solution being provided between electrodes;, 'mixing with water, together or separately,'}applying potentiostatic pulse electrolysis to the solution so as to cause the formation of metal oxide anions at the first or second electrode, wherein soluble metal oxide anions formed become separated from the first or second electrode back into the electrolytic solution;reacting the formed metal oxide anion with a suitable metal salt to obtain metal oxide particles dispersed in solution; and optionallyseparating the metal oxide particles from the electrolytic solution.2. The method of claim 1 , wherein the oxide formed is selected from ZnO claim 1 , InO claim 1 , RuO claim 1 , IrO claim 1 , CrO claim 1 , MnOand ReO.3. The method of or claim 1 , wherein the metal oxide formed is a metal oxide of one or more of the metals selected from Ce claim 1 , Zr claim 1 , Zn claim 1 , Co claim 1 , Fe claim 1 , Mg claim 1 , Gd claim 1 , Ti claim 1 , Sn claim 1 , Ru claim 1 , Mn claim 1 , Cr and Cu.4. The method of any of to claim 1 , ...

Подробнее
Номер записи: 6
20-11-2008 дата публикации

環状アルキレンイミンの製造方法

Номер: JP2008280300A
Автор: Ｍ ガッダ トーマス, M Gadda Thomas, Satoru Miyazawa, 哲 宮沢
Принадлежит: National Institute of Advanced Industrial Science and Technology AIST, Taiyo Nippon Sanso Corp

【課題】簡便な製造装置を使用して任意の生産に対応が可能な環状アルキレンイミン、及び重水素化された環状アルキレンイミンの製造方法を提供する。 【解決手段】軽水又は重水溶液中でルテニウム系触媒の存在下に、主鎖を形成しているアルキレン基の炭素数が４〜６であるα，ω−ジアミノアルカンを環化反応させる環状アルキレンイミンの製造方法、及び、重水溶液中でルテニウム系触媒の存在下に、主鎖を構成するアルキレン基の炭素数が４〜６であるα，ω−ジアミノアルカンを環化反応させて得られる、重水素化された環状アルキレンイミンが、複素環の主鎖を形成している炭素原子に結合している、水素原子と重水素原子中の重水素原子の割合（［重水素原子（原子数）／（水素原子＋重水素原子）（原子数）］×１００（％））が５０％以上であることを特徴とする、環状アルキレンイミンの製造方法。 【選択図】なし

Подробнее
Номер записи: 7