摘要:
A process is provided for preparing urea-containing polymers by contacting a hydroxy-functional organic compound having a functionality of two or more, with a coupling agent in the presence of a strong base, wherein the coupling agent is a carbonylbislactam compound having the general formula (I): wherein n is an integer from 3 to 15, and that the contacting is conducted at a temperature between 0° C. and 80° C. The polymers thus obtained are believed to be new and are useful e.g. in tissue engineering and coatings applications.
摘要:
Thermosetting compositions consist of a homogeneous mixture of an ethylenically unsaturated compound, a bismaleimide compound or a bismaleimide containing composition and an acid compound, with optionally further copolymerizable compounds and usual additives. The thermosetting composition are useful as a coating resin, a laminating resin or for the manufacture of shaped articles.
摘要:
The invention relates to a process for preparing a high-molecular polycondensate, i.e. a polyester, a polyamide, a polyester-amide, a polycarbonate, a polyether or a block copolymer by melt-mixing a polyester, a polyamide, a polycarbonate, a polyether or a mixture of at least two of these said polycondensates with a carbonyl bislactam according to formula (I) in which formula n is an integer of between 3 and 15, and a diepoxide. Preferably said diepoxide is a compound containing epoxy radicals of formula (II), which radicals are linked direct to carbon, oxygen, nitrogen or sulfur atoms, wherein R1 and R3 are both hydrogen, R2 is hydrogen or methyl, and m=0, or wherein R1 and R3, taken together, are —CH2—CH2— or —CH2—CH2—CH2—, in which case R2 is hydrogen and m=0 or 1. The present invention results in a more stable process for the production of a polycondensate with a high molecular mass. Furthermore the polycondensate obtained with the process according to the invention has, even under extreme process conditions such as high temperature, less discoloration. With the process according to the invention a permanent increase in the molecular weight of a polycondensate is obtained in an even faster way than with processes according to the state of the art.
摘要:
The invention relates to a process for the preparation of a polymer composition, the process comprising a step of contacting a polymer that comprises carboxyl groups with a cyclic imino ether compound characterized in that the cyclic imino ether compound is a phenylene oxazine according to formula (I), in which formula R=an oxazine group according to formula (II) n=0, 1, 2, 3, 4 or 5 and that the polymer is contacted with said oxazine in an extruder at a temperature above 100° C.
摘要:
The invention relates to a method for the preparation of ethylenically unsaturated lactam-blocked isocyanate compounds, by reacting an unsaturated amine-functional or hydroxy-functional compound with carbonylbislactam. These compounds can be polymerised and are subsequently cured by the built-in crosslinker to form thermosetting polymers which can be applied for instance in powder coatings.
摘要:
The present invention relates to a method for the production of an isotropic polymeric network comprising multifunctional molecules with a functionality of at least 5 by reacting in a solvent the multifunctional molecules with a coupling agent, wherein the coupling agent is present in an amount which is sufficient to couple the multifunctional molecules to at least 5 other multifunctional molecules and wherein the sum, ρ, of the amounts of the multifunctional molecules and coupling agent per unit of volume, in kg/m3, is at least equal to the value as given by expression (I) in which a=0.2 d=the diameter of the multifunctional molecule, including the length of the bonds to the middle of atoms of the coupling agent to which it is attached. L=the length of the coupling agent, measured between the middle of the atoms that are connected to the multifunctional molecule. m1=the molecular mass of the multifunctional molecule as present in the isotropic 20 polymeric network m2=the molecular mass of the coupling agent as present in the isotropic polymeric network n=the functionality of the multifunctional molecule (n≧5). The invention furthermore relates to an isotropic polymeric network with a density lower than 1000 kg/m3 and a specific Young's modulus of at least 0.01 GPa.m3/kg, shaped articles hereof and the use of the isotropic polymeric network as construction material.
摘要翻译:本发明涉及通过在溶剂中使多官能分子与偶联剂反应而制备各向同性聚合物网络的方法,其中官能度至少为5的多官能分子,其中偶联剂的存在量足够 将多功能分子连接至至少5个其他多功能分子,其中以kg / m 3为单位的单位体积的多功能分子和偶联剂的量的总和至少为 等于由表达式(I)给出的值,其中a = 0.2d =多功能分子的直径,包括连接到其所连接的偶联剂的原子中间的键的长度。 L =耦合剂的长度,在连接到多功能分子的原子的中间测量。 m 1 =各向同性20聚合物网络中存在的多官能分子的分子量m 2 =存在于各向同性聚合物网络中的偶联剂的分子质量n =多功能分子的功能(n> = 5)。 本发明还涉及密度低于1000kg / m 3的各向同性聚合物网络,并且具有至少0.01GPa.m 3 / kg的特定杨氏模量,成形 文章和各向同性聚合物网络的使用作为建筑材料。
摘要:
Catalyst system, suitable for the (co)polymerization of ethylene and optionally minor amounts of 1-alkenes and/or dienes at a temperature of at least 180.degree. C., to be prepared by combining at least two components A and B, which components comprise:A: one or more titanium compounds, one or more vanadium compounds, one or more aluminium compounds, one or more magnesium compounds and optionally one or more halogen compounds, in such amounts that the atomic ratio of magnesium to the sum of titanium and vanadium is between 0 and 10, the atomic ratio of aluminium to the sum of titanium and vanadium is at least 3, the atomic ratio of aluminium to magnesium is at least 1, and the atomic ratio of halogen to magnesium is at least 2,B: one or more organoaluminium compounds, which two components are, separately or in combination, supplied direct to the polymerization vessel.
摘要:
Process for the preparation of a functionalized polymer containing an additive, in which process there is formed a compound that contains, besides at least one blocked isocyanate group, a free amino, hydroxy or carboxy group; this compound is linked to an additive via the free amino, hydroxy or carboxy group in the additive; this additive linked to the compound mentioned is contacted with a polymer that contains at least one free amino or hydroxyl group, at a temperature above the polymer's melting point and at least above (150)° C., such that the blocked isocyanate group reacts with the free amino or hydroxy group of the polymer to form the functionalized polymer. The invention also relates to the intermediate products formed in the process and in the preparation thereof. Lasdy, the invention relates to functionalized polymers and polymer compositions containing the functionalized polymer.
摘要:
The invention relates to a process for preparing a high-molecular polyamide or polyester or copolyester by melt-mixing polyamide or polyester or copolyester having a lower molecular weight with a blocked diisocyanate having the following formula. wherein R=linear, branched or cyclo aliphatic C2-C20 or aromatic C6-C20 and B1, B2=Caprolactam, Imidazole, dimethyl-pyrazole, triazole, oxim, malonic acid ester, ethylacetylacetonate, phenol, cresol, aliphatic alcohol, secundary amine, hydroxy benzoic acid methyl ester. With the process according to the invention a permanent increase in the molecular weight of a polyamide is obtained within 2 minutes, whereas this takes at least 10 minutes under comparable conditions using a blocked isocyanate according to the state of the art.
摘要:
The present invention relates to an antimicrobial material consisting of particles comprising an antimicrobial agent (A) and a carrier (B), wherein: the antimicrobial material is a granular material; at least 90% w/w of the particles have a particle size in the range of from 1.0 mm up to and including 8.0 mm measured according to the method DIN 66165-1/-2; at least 90% w/w of the particles have an aspect ratio R, equal to or lower than 8; the antimicrobial agent (A) comprises elemental silver nanoparticles; the antimicrobial agent (A) is present in an amount in the range of from 0.001% w/w up to and including 2% w/w on antimicrobial material; the carrier (B) is a polymer comprising a polyamide; the carrier (B) is present in an amount in the range of from 98% w/w up to and including 99.999% w/w on antimicrobial material. The invention further relates to an article comprising the granular antimicrobial material, a device comprising the granular antimicrobial material or the article. The invention also relates to a process for preparing the granular antimicrobial material and use of the granular antimicrobial material or an article or a device comprising the granular antimicrobial material in water treatment systems/appliances, water filters, swimming pools, whirlpools, water supply containers, water storage and for treatment of drinking water.