摘要:
An encapsulating composition for electronic devices comprises a curable material such as a silicone resin and an ion scavenger compound selected from certain calixarene or oxacalixarene compounds in which at least half of the phenolic groups have been substituted by specific groups and certain silacrown compounds. Exemplary ion scavenger compounds include ##STR1## the tetraethyl acetate of 7, 13, 19, 25-tetra-tertbutyl-27, 28, 29, 30-tetrahydroxy-2,3-dihomo-3-oxacalix-4-arene and 1,1-dimethasila-17-crown-6.
摘要:
A linear or cross-linked polymer selected from polythioethers, polyethers, styrenic polymers, polyacrylates, and polyorganosiloxanes having a plurality of calixarene groups bound thereon, the calixarene groups having the formula ##STR1## where the R.sup.1 groups are the same or different H or hydrocarbyl groups; the R.sup.2 groups are H, hydrocarbyl, --CH.sub.2 C(.dbd.O)OR.sup.3, --CH.sub.2 C(.dbd.O)R.sup.3, or --C(.dbd.O)NHR.sup.3, R.sup.3 is hydrocarbyl or substituted hydrocarbyl; n is an integer of 1-8, m is an integer of 0-7 and n+m is 4-8.
摘要:
A linear or cross-linked polymer selected from polythioethers, polyethers, styrenic polymers, polyacrylates, and polyorganosiloxanes having a plurality of calixarene groups bound thereon, the calixarene groups having the formula ##STR1## where the R.sup.1 groups are the same or different H or hydrocarbyl groups; the R.sup.2 groups are H, hydrocarbyl, --CH.sub.2 C(=O)OR.sup.3, --CH.sub.2 C(=O)R.sup.3, or --C(=O)NHR.sup.3, R.sup.3 is hydrocarbyl or substituted hydrocarbyl; n is an integer of 1-8, m is an integer of 0-7 and n+m is 4-8.
摘要:
A method for applying a polymeric resist coating of very high molecular weight to a suitable substrate without the necessity of elaborate purification steps and for ensuring adequate coverage of raised regions in three-dimensionally patterned substrates. The method comprises exposing the substrate to be coated to the vapor of an anionically polymerizable monomer of the formula:CHR.dbd.CXYwhere X and Y are strong electron withdrawing groups and R si H or, provided that X and Y are both --CN, C.sub.1 -C.sub.4 alkyl for sufficient time to deposit a polymerizable coating thereon. Particularly preferred monomers are 2-cyanoacrylate esters. The monomer condenses and polymerizes on the surface of the substrate to give a highly uniform high molecular weight polymeric coating which is useful as a resist coating in lithographic processes employing plasma or acid etch techniques.
摘要翻译:一种将非常高分子量的聚合物抗蚀剂涂层施加到合适的基底上的方法,而不需要精心的纯化步骤,并且确保在三维图案化的基底中充分覆盖凸起区域。 该方法包括将待涂覆的基底暴露于下式的阴离子可聚合单体的蒸气:CHR = CXY,其中X和Y是强吸电子基团和R si H,或者X和Y都是-CN,C1 -C4烷基,足以在其上沉积可聚合涂层。 特别优选的单体是2-氰基丙烯酸酯。 单体在基材的表面上缩合和聚合,得到高度均匀的高分子量聚合物涂层,其在使用等离子体或酸蚀刻技术的光刻工艺中用作抗蚀剂涂层。
摘要:
A method for imaging vapor deposited photoresists of cyanoacrylates or related anionically polymerizable monomers without the use of solvent development. This method consists of treating the substrate with a compound which releases acid when exposed to high-energy radiation. In certain cases when the surface of the substrate is slightly acidic or neutral, it is necessary to activate the surface with a basic liquid or vapor which must be chosen so as not to react with the radiation-sensitive acid precursor. The substrate is exposed to actinic or ionizing radiation through a mask or to steered high-energy beams. Finally, the substrate is exposed to a vapor of cyanoacrylate monomer which condenses and polymerizes on the unirradiated regions forming a relief image.
摘要:
Curable thiol/ene compositions comprise:(1) a multifunctional styryloxy monomer having one or more of the following structures ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are selected from vinyl (--CH.dbd.CH.sub.2), 1-propenyl (--CH.dbd.CH--CH.sub.3), isopropenyl ##STR2## hydrogen, lower alkyl or alkoxy, provided that at least one of R.sup.1, R.sup.2 and R.sup.3 must be vinyl, 1-propenyl or isopropenyl;n is an integer .gtoreq.1;if n=1, then R.sup.4 is a monovalent hydrocarbon radical containing one free-radically copolymerizable alkenyl or cycloalkenyl group,if n.gtoreq.2, R.sup.4 is a multivalent hydrocarbon radical which may contain a maximum of one free-radically copolymerizable alkenyl or cycloalkenyl group;R.sup.5 is a divalent hydrocarbon radical; or a carbon atom which is part of a cyclic group in the radical G; or a radical of formula ##STR3## where R.sup.7 is a divalent hydrocarbon radical; if n=1, G is a monovalent organic or inorganic radical, free of phenolic hydroxyl groups or other groups which substantially interfere with radical polymerization, containing one free-radically copolymerizable alkenyl or cycloalkenyl group;if n.gtoreq.2, G is a multivalent organic or inorganic radical, free of phenolic hydroxyl groups or other groups which substantially interfere with radical polymerization, which may contain a maximum of one free-radically copolymerizable alkenyl or cycloalkenyl group;R.sup.6 is a lower alkyl or cycloalkyl group; or if n=1, R.sup.6 may also be an alkenyl or cycloalkenyl group, provided that G does not contain an alkenyl or cycloalkenyl group.(2) a multifunction thiol.(3) a free-radical curing rate accelerator.Novel styryloxy compounds are described which are reaction products of isoeugenol and (a) multifunctional epoxy compounds or (b) allyl glycidyl ether with or without a multifunctional polydimethylsiloxane.
摘要:
Polyfunctional cationically polymerizable styryloxy compounds of the formula ##STR1## where R.sup.1 is H or methyl; R.sup.2 is hydrocarbyl, hydrocarbyl interrupted by ether oxygen atoms, or halo substituted hydrocarbyl; R.sup.3 is H, lower alkyl, or alkoxy; G is any multivalent organic or inorganic radical free of amino or aliphatic thiol groups; and n is an integer of two or more.
摘要:
Cyanoacrylate adhesive compositions which employ calixarene compounds as accelerators give substantially reduced fixture and cure times on de-activating substrates such as wood. The calixarene compounds are preferably employed at levels of about 0.1-1% by weight of the composition.The calixarene compounds particularly useful in this invention may be represented by the formula: ##STR1## where R.sup.1 is alkyl, alkoxy, substituted alkyl or substituted alkoxy; R.sup.2 is H or alkyl; and n=4, 6, or 8.
摘要:
Cyanoacrylate adhesive compositions which employ calixarene compounds as additives give substantially reduced fixture and cure times on de-activating substrates such as wood. The calixarene compounds are preferably employed at levels of about 0.1-1% by weight of the composition. The calixarene compounds particularly useful in this invention may be represented by the formula: ##STR1## where R.sup.1 is alkyl, alkoxy, substituted alkyl or substituted alkoxy; R.sup.2 is H or alkyl; and n=4, 6, or 8.The compositions are further characterized by a thickener component, which may suitably be selected from various polymers such as poly(methyl methacrylate), methacrylate type copolymers, acrylic rubbers, polyvinyl acetate and poly(.alpha.-cyanoacrylate) or silicas treated with polydialkylsiloxanes or trialkylsilanes.
摘要:
Cyanoacrylate adhesive compositions which employ calixarene compounds as additives give substantially reduced fixture and cure times on de-activating substrates such as wood. The calixarene compounds are preferably employed at levels of about 0.1-1% by weight of the composition.The calixarene compounds particularly useful in this invention may be represented by the formula: ##STR1## where R.sup.1 is alkyl, alkoxy, substituted alkyl or substituted alkoxy; R.sup.2 is H or alkyl; and n=4, 6 or 8.
摘要翻译:使用杯芳烃化合物作为添加剂的氰基丙烯酸酯粘合剂组合物在去活化底物例如木材上显着降低夹具和固化时间。 杯芳烃化合物优选以组合物重量的约0.1-1%的量使用。 特别可用于本发明的杯芳烃化合物可以由下式表示:其中R 1是烷基,烷氧基,取代的烷基或取代的烷氧基; R2是H或烷基; n = 4,6或8。