摘要:
The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.
摘要:
The invention concerns a cationic catalyst system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter anion generated by the reaction between the catalyst (K) and the initiator (I). Said cocatalyst is characterized by the existence of a double bond electron-depleted by an electroattractive group. It is selected, for example, from the group consisting of the following complexing agents including o-chloranyl (3,4,5,6-tetrachloro-1,2-benzoquinone), p-chloranyl (2,3,5,6-tetrachloro-1,4-benzoquinone), nitrobenzene, trinitrobenzene, or tetracyanoethylene.
摘要:
The invention concerns a cationic catalyst system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter anion generated by the reaction between the catalyst (K) and the initiator (I). Said cocatalyst is characterized by the existence of a double bond electron-depleted by an electroattractive group. It is selected, for example, from the group consisting of the following complexing agents including o-chloranyl (3,4,5,6-tetrachloro-1,2-benzoquinone), p-chloranyl (2,3,5,6-tetrachloro-1,4-benzoquinone), nitrobenzene, trinitrobenzene, or tetracyanoethylene.
摘要:
The present invention relates to polyetheresteramides (B) containing polyamide blocks comprising dicarboxylic acid sulphonates either as polyamide-block chain limiters or combined with a diamine as one of the constituent monomers of the polyamide block, and the containing polyether blocks consisting essentially of alkylene oxide units.The invention also relates to polyetheresteramides (B) containing polyamide blocks of the polyamide oligomer type of low molecular mass or of the copolyamide type which comprise dicarboxylic acid sulphonates and containing polyether blocks which are adducts of alkylene oxide with an aromatic diol.The invention also relates to antistatic or breathable polymer compositions comprising a thermoplastic polymer (A) and at least one of the above polyetheresteramides (B).
摘要:
The invention relates to the use of a structure for manufacturing hermetical industrial or food packaging in direct contact with a humid or aqueous medium, the structure comprising at least one layer of polydimethyl ketone in direct contact with the most humid medium, (i) the latter being situated within the packaging when the packaging accommodates water or an aqueous or humid product and (ii) the most humid medium being situated outside the packaging when the packaging accommodates a product which is dry or which is to be protected from humidity. The food packaging comprises, for example, trays, sachets, bottles and flasks and the industrial packaging comprises, for example, pipes, containers and drums.
摘要:
The present invention relates to an antistatic polymer composition and more specifically to a composition comprising a thermoplastic polymer (A) and a copolymer (B) comprising polyamide blocks and polyether blocks comprising essentially ethylene oxide units —(C2H4—O)—, the copolymer (B) having a melting temperature of between 80 and 150° C. It is of use for the polymers (A) which are heat-sensitive or which are processed at low temperature.
摘要翻译:本发明涉及抗静电聚合物组合物,更具体地说涉及包含热塑性聚合物(A)和共聚物(B)的组合物,该组合物包含聚酰胺嵌段和基本上包含环氧乙烷单元(C 2 H 4 O) - ,共聚物( B)熔融温度在80-150℃之间。对于热敏性或在低温下加工的聚合物(A)是有用的。
摘要:
The present invention relates to polyetheresteramides (B) containing polyamide blocks comprising dicarboxylic acid sulphonates either as polyamide-block chain limiters or combined with a diamine as one of the constituent monomers of the polyamide block, and containing polyether blocks consisting essentially of alkylene oxide units. The invention also relates to polyetheresteramides (B) containing polyamide blocks of the polyamide oligomer type of low molecular mass or of the copolyamide type which comprise dicarboxylic acid sulphonates and containing polyether blocks which are adducts of alkylene oxide with an aromatic diol. The invention also relates to antistatic or breathable polymer compositions comprising a thermoplastic polymer (A) and at least one of the above polyetheresteramides (B).
摘要:
Use, as adhesion promoter intended for application to the surface of a substrate S1 made of thermoplastic elastomer polymer TPE which comprises a chain formed of an alteration of hard segments and of soft segments, for the purpose of the adhesive assembly of the said substrate S1 with another substrate S2, of at least one solvent of the hard segments and/or of the soft segments of the said thermoplastic elastomer polymer TPE.
摘要:
The present invention relates to a composition comprising, per 100 parts by weight: 99 to 60 parts of a thermoplastic polymer (D), 1 to 40 parts of (A)+(B)=(C) (A) being a copolymer comprising polyamide blocks and polyether blocks, (B) being a polymer or an oligomer which comprises, in its chain, at least one ionic functional group and is chosen from: polyamides, copolymers comprising polyamide blocks and polyether blocks, thermoplastic polyesters or polyesteramides, copolymers comprising polyester blocks and polyether blocks, polyethers, polyurethanes. The invention also relates to the blends of (A) and (B) as product.
摘要:
The invention describes polyamides having both strongly hydrophilic groups and unsaturated groups, the polyamides consequently being water-dispersible and curable. The hydrophilic groups are distributed along the chain, whereas the unsaturated groups are located at the ends. The polyamides of the invention are useful in many applications, especially in the preparation of intimate blends of polyamides with vinyl, acrylic and/or styrene polymers.