摘要:
A composite plastic structure is described. The composite structure includes: (a) a shaped polycarbonate article having an edge region, the edge region having an adhesion-promoting geometric feature therein; (b) a coating applied to the surface of the shaped polycarbonate article; and (c) a polymer that is injection-molded or cast over the edge region of the shaped polycarbonate article. The polymer (c) envelopes the adhesion-promoting geometric feature of the shaped polycarbonate article (a). The envelopment of the adhesion-promoting geometric feature by the polymer (c) provides a structurally firm connection between the shaped polycarbonate article (a) and the polymer (c). Also described is a method of preparing the composite structure, and composite structures according to the present invention, such as picture frames, slide frames, windows having a seal or frame, and a glazing for a motor vehicle.
摘要:
A multilayered article is disclosed, which includes, in sequence: (1) a substrate (S), e.g., of thermoplastic polycarbonate; (2) a scratch-resistant layer (SR); and (3) a top layer (T). The scratch-resistant layer is prepared by curing a scratch-resistant coating composition comprising a polycondensate prepared from at least one silane, said polycondensate being prepared by a sol-gel process. The top layer is prepared by curing a top layer coating composition prepared by hydrolyzing a composition which includes: at lest one compound represented by general formula I, M(R′)m (I) wherein M is an element selected from the group consisting of Si, Ti, Zr, Sn, Ce, Al, B, VO, In and Zn, R′ represents a hydrolysable radical, and m is an integer from 2 to 4; and optionally at least one compound represented by general formula II, RbSiR′a, (II) wherein the radicals R′ and R are the same or different, R′ is as defined for general formula (I), R represents a group selected from an alkyl group, an alkenyl group, an aryl group, a hydrocarbon group with at least one halogen group, an epoxide group, a glycidyloxy group, an amino group, a mercapto group, a methacryloxy group and a cyano group, and a and b independently of one another have a value from 1 to 3, provided that the sum of a and b is four. The multilayered articles are distinguished by possessing outstanding scratch and abrasion resistance.
摘要:
A process for the production of polycarbonate molded article having low dust attraction is disclosed. the process entails treating at least a portion of the surface of a molded article by at least one procedure selected from the group consisting of flame treatment, corona treatment and plasma treatment to obtain a treated surface.
摘要:
A process for the production of coated planar moldings of thermoplastics is disclosed. The process entails extrusion of a molded body, cooling of the molding, applying the aqueous-based coating agent and drying. The coating agent, having a pH value of less than 6, contains a salt of sulfondicarboxylic diester, a water-insoluble oxide of metal or semi-metal and an acid/water mixture. It is applied to at least one surface of the molding immediately after the production of the molding and with the aid of an application roll.
摘要:
High-temperature-resistant, flexible screen printing inks containing as binder a thermoplastic aromatic polycarbonate with a molecular weight M.sub.w (weight average) of at least 10,000 which contains bifunctional carbonate structural units corresponding to formula (I): ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl, C.sub.6-10 aralkyl,m is an integer of 4 to 7R.sup.3 and R.sup.4 may be individually selected for each X and, independently of one another, represent hydrogen or C.sub.1-6 alkyl andX represents carbonwith the proviso that, at least one atom X, R.sup.3 and R.sup.4 are both alkyl, and halogen-free solvents or solvent mixtures.
摘要翻译:含有分子量为+ E的热塑性芳族聚碳酸酯,含有对应于式(I)的双官能碳酸酯结构单元的至少10,000的MgO M + EE w(重均分子量)的耐热柔性丝网印刷油墨: 其中R 1和R 2彼此独立地表示氢,卤素,C 1-8烷基,C 5-6环烷基,C 6-10芳烷基,m是4至7的整数,R 3可以单独选择 对于每个X并且彼此独立地表示氢或C 1-6烷基,X表示碳,条件是至少一个原子X,R 3和R 4都是烷基和不含卤素的溶剂或溶剂混合物。
摘要:
The present invention provides a coating which contains a primer layer on a substrate with a scratch resistant layer adhered to the primer, wherein the primer layer contains a hardened epoxy resin prepared from a hardener and a multi epoxy-functional compound and the scratch resistant layer contains an epoxide group containing hydrolyzable silane. The coating may find use in coated products such as sheets, spectacles, optical lenses, automobile screens and plastic spray screens.
摘要:
A molding having at least part of its surface coated with a water-spreading coating is disclosed. The coating comprise a salt of sulfondicarboxylic diester, a water-insoluble oxide of metal or semi-metal and an acid/water mixture. It is applied to at least one surface of the molding.
摘要:
A UV-stabilizer comprising a mixture of hydroxybenzotriazole and a hydrolyzable silane containing at least one epoxy group is disclosed. The stabilizer is especially suitable as a component of a siloxane system for coating substrates, especially thermoplastic substrates and most especially polycarbonate substrates.
摘要:
The invention relates to coated moldings of polycarbonates with a coating (A) against the effect of UV radiation and, optionally a coating (B) to prevent the formation of droplets.
摘要:
Siloxanes containing epoxy groups having the formula 1 ##STR1## Formula 1 whereinA means a C.sub.1 -C.sub.20 alkyl radical with epoxy groupsB means R.sup.1 or AR.sup.1, R.sup.2 independently of each other, means C.sub.1 -C.sub.20 alkyl or C.sub.6 -C.sub.10 aryla means zero or a whole number from 1-100b means zero or a whole number from 1-100c means a whole number from 1-5.