Stereolithography using repeated exposures to increase strength and
reduce distortion
    52.
    发明授权
    Stereolithography using repeated exposures to increase strength and reduce distortion 失效
    使用反复曝光进行立体光刻以增加强度并减少变形

    公开(公告)号:US4945032A

    公开(公告)日:1990-07-31

    申请号:US429561

    申请日:1989-10-31

    IPC分类号: B29C67/00 G03F7/00

    摘要: An improved stereolithographic process is provided in which the formation of a thin walled three-dimensional object in a reservoir of liquid ultraviolet-curable ethylenically unsaturated material using a support is positioned immediately beneath the upper surface of the liquid reservoir with that upper surface being exposed to ultraviolet light in a pattern to solidify the liquid at and near the upper surface in a series of cross-sections of the desired three-dimensional object, one atop the other. In this way there is formed a series of superposed layers which adhere to one another to build the desired three-dimensional object within the liquid reservoir. The improvement comprises, stopping the exposure at any portion of the surface in the formation of said layers and then repeating the exposure at least once again in the production of each surface layer so that the strength and solvent resistance of the formed object are increased and its distortion is minimized. The ultraviolet exposure of each surface layer is preferably carried out as a series of rapid repeated scans of a computer-directed focused laser.

    摘要翻译: 提供了一种改进的立体光刻方法,其中使用支撑体在液体紫外线固化的烯属不饱和材料的储存器中形成薄壁三维物体位于液体储存器的上表面的正下方,该上表面暴露于 紫外光以图案的方式固化所需三维物体的一系列横截面中的上表面上和附近的液体,一个在另一个之上。 以这种方式形成一系列重叠的层,其彼此粘附以在液体储存器内构建所需的三维物体。 改进之处在于,在形成所述层的表面的任何部分处停止曝光,然后在每个表面层的制造中至少再次重复曝光,使得所形成的物体的强度和耐溶剂性增加, 失真最小化。 每个表面层的紫外线暴露优选作为计算机引导的聚焦激光器的一系列快速重复扫描进行。

    Method of forming a three-dimensional object by stereolithography and
composition therefore
    53.
    发明授权
    Method of forming a three-dimensional object by stereolithography and composition therefore 失效
    因此通过立体光刻法和组合物形成三维物体的方法

    公开(公告)号:US4942001A

    公开(公告)日:1990-07-17

    申请号:US429568

    申请日:1989-10-31

    摘要: A stereolithographic method which employs an ultraviolet-curable liquid composition adapted to cure rapidly to a lightly cross-linked solvent-swellable three-dimensional complexly-shaped polymeric thin-walled element constituted by heat-softenable solid polymer upon exposure to ultraviolet dosage in the range of about 0.1 to about 10 Joules per square centimeter and which possesses reduced distortion comprises, from 20 to 80 weight percent, of a resinous polyacrylate or polymethacrylate dissolved in a combination of 10 to 45 weight percent of a liquid polyacrylate or polymethacrylate, which is preferably trifunctional, and 10 to 45 weight percent of liquid N-vinyl monomer, preferably N-vinyl pyrrolidone. Thus, the weight ratio of polyacrylate: polymethacrylate: N-vinyl monomer is about 1:2:2 to about 8:1:1. One of the foregoing polyacrylates or polymethacrylates is a polyacrylate and the other is a polymethacrylate so that good cure speed is accompanied by good distortion resistance. In the method, a reservoir of the liquid composition is established and its exposed surface is irradiated to solidify the surface and build up a thin-walled element which is removed from the reservoir, drained of liquid adhering thereto and cured.

    摘要翻译: 一种立体光刻方法,其采用可紫外线固化的液体组合物,其适于快速固化至在可暴露于范围内的紫外线剂量下由可热软化的固体聚合物构成的轻度交联的溶剂可膨胀的三维复合形状的聚合物薄壁元件 约0.1至约10焦耳每平方厘米并且具有减小的变形的组合包含20至80重量%的以10至45重量%的液体聚丙烯酸酯或聚甲基丙烯酸甲酯的组合溶解的树脂聚丙烯酸酯或聚甲基丙烯酸酯,其优选 三官能和10至45重量%的液体N-乙烯基单体,优选N-乙烯基吡咯烷酮。 因此,聚丙烯酸酯:聚甲基丙烯酸酯:N-乙烯基单体的重量比为约1:2:2至约8:1:1。 上述聚丙烯酸酯或聚甲基丙烯酸酯之一是聚丙烯酸酯,另一种是聚甲基丙烯酸酯,因此良好的固化速度伴随着良好的抗变形性。 在该方法中,建立了液体组合物的储存器,并且照射其暴露的表面以固化表面并且形成从储存器中取出的薄壁元件,排出附着在其上并固化的液体。

    Ultraviolet curable basecoats for vacuum metallization
    55.
    发明授权
    Ultraviolet curable basecoats for vacuum metallization 失效
    用于真空金属化的紫外线固化底漆

    公开(公告)号:US4481093A

    公开(公告)日:1984-11-06

    申请号:US537695

    申请日:1983-09-30

    摘要: An ultraviolet light-curable liquid coating composition for molded plastic objects is disclosed. The composition is a liquid mixture of a polyurethane oligomer polyacrylate and an hydroxy-functional polyacrylate ester. The polyacrylate ester is present in an amount of from more than 50% up to 70% of total polyacrylate, and the composition is in solution in alcoholic solvent providing a solids content of from 65% to 90%. A photoinitiator is included to render the composition curable upon exposure to ultraviolet light.

    摘要翻译: 公开了一种用于模制塑料物体的紫外线可光固化液体涂料组合物。 该组合物是聚氨酯低聚物聚丙烯酸酯和羟基官能聚丙烯酸酯的液体混合物。 聚丙烯酸酯以总聚丙烯酸酯的50%以上至70%的量存在,并且该组合物在醇溶剂溶液中提供固体含量为65%至90%。 包括光引发剂以使组合物在暴露于紫外线下时可固化。

    Low temperature curing thermosetting coatings for solvent-sensitive
moldings
    56.
    发明授权
    Low temperature curing thermosetting coatings for solvent-sensitive moldings 失效
    用于溶剂敏感模制品的低温固化热固性涂料

    公开(公告)号:US4404308A

    公开(公告)日:1983-09-13

    申请号:US381175

    申请日:1982-05-24

    IPC分类号: C08J7/04 C09D133/12 B05D3/02

    摘要: A low temperature curing solution coating composition is disclosed for the protection of solvent-sensitive thermoplastic moldings. In these compositions, a solvent medium consisting essentially of alcoholic solvents has dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers containing an ether of an N-methylol functional monomer, especially isobutoxymethyl acrylamide. This solution is catalyzed with from 3% to 12%, based on the weight of the copolymer, of a long chain dialkyl naphthalene disulfonic acid. The catalyzed compositions are stable and cure at 150.degree. F. to 200.degree. F. without damaging the thermoplastic moldings.

    摘要翻译: 公开了低温固化溶液涂料组合物用于保护溶剂敏感的热塑性模制品。 在这些组合物中,基本上由醇溶剂组成的溶剂介质溶解有含有N-羟甲基官能单体的醚,特别是异丁氧基甲基丙烯酰胺的单烯属不饱和单体的自固化溶液共聚物。 该溶液以长链二烷基萘二磺酸为基准,以共聚物的重量为3%至12%催化。 催化的组合物是稳定的并且在150°F至200°F下固化,而不损害热塑性模制品。

    Low temperature curing thermosetting coatings for solvent-sensitive
moldings
    57.
    发明授权
    Low temperature curing thermosetting coatings for solvent-sensitive moldings 失效
    用于溶剂敏感模制品的低温固化热固性涂料

    公开(公告)号:US4331719A

    公开(公告)日:1982-05-25

    申请号:US219843

    申请日:1980-12-23

    IPC分类号: C08J7/04 B05D3/02

    摘要: A low temperature curing solution coating composition is disclosed for the protection of solvent-sensitive thermoplastic moldings. In these compositions, a solvent medium consisting essentially of alcoholic solvents has dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers containing an ether of an N-methylol functional monomer, especially isobutoxymethyl acrylamide. This solution is catalyzed with from 0.5% to 2.0%, based on the weight of the copolymer, of sulfuric acid. The catalyzed compositions are stable and cure at 150.degree. F. to 200.degree. F. without damaging the thermoplastic moldings.

    摘要翻译: 公开了低温固化溶液涂料组合物用于保护溶剂敏感的热塑性模制品。 在这些组合物中,基本上由醇溶剂组成的溶剂介质溶解有含有N-羟甲基官能单体的醚,特别是异丁氧基甲基丙烯酰胺的单烯属不饱和单体的自固化溶液共聚物。 该溶液以基于共聚物的重量计为0.5%至2.0%的硫酸催化。 催化的组合物是稳定的并且在150°F至200°F下固化,而不损害热塑性模制品。

    Polymerizable monoethylenic carboxylic acids which decarboxylate on
heating
    58.
    发明授权
    Polymerizable monoethylenic carboxylic acids which decarboxylate on heating 失效
    加热时脱羧的可聚合单烯羧酸

    公开(公告)号:US4299979A

    公开(公告)日:1981-11-10

    申请号:US50645

    申请日:1979-06-21

    申请人: Edward J. Murphy

    发明人: Edward J. Murphy

    CPC分类号: C08F20/60

    摘要: Carboxy functional addition-polymerizable monoethylenically unsaturated monomers and their volatile amine salts are disclosed, along with addition copolymers useful in coatings prepared therefrom. Both monomers and polymers decompose on heating. The monomers are bisamides comprised of a monoethylenically unsaturated amide and malonic acid half amide joined through their amide functionalities by a divalent saturated aliphatic group having 1-4 carbon atoms.

    摘要翻译: 公开了羧基官能加成聚合单烯属不饱和单体及其挥发性胺盐,以及可用于由其制备的涂料中的加成共聚物。 单体和聚合物都在加热时分解。 单体是由单烯属不饱和酰胺和丙二酸半酰胺组成的双酰胺,其通过其具有1-4个碳原子的二价饱和脂族基团通过它们的酰胺官能团连接。

    Electrodepositable micellar dispersions
    59.
    发明授权
    Electrodepositable micellar dispersions 失效
    电沉积胶束分散体

    公开(公告)号:US4122053A

    公开(公告)日:1978-10-24

    申请号:US399912

    申请日:1973-09-24

    CPC分类号: C09D5/4484 Y10S524/901

    摘要: Base neutralized electrodepositable coating compositions which may be utilized in a continuous electrophoretic process without the necessity of employing membrane controls. Such coating compositions are micellar dispersions comprising a resinous vehicle which is blended or admixed with an organic liquid dispersant, said dispersant having limited solubility in water and a limited affinity for the electrodepositable vehicle, and whereby the admixture is subsequently partially neutralized with a base. Such compositions when cured provide for coatings having good salt spray resistance, mar resistance, appearance, and other desirable physical characteristics.

    摘要翻译: 可中和的可电沉积涂料组合物,其可用于连续电泳方法中,而不需要使用膜对照。 这种涂料组合物是包含与有机液体分散剂混合或混合的树脂载体的胶束分散体,所述分散剂在水中的溶解度有限并且对电沉积载体具有有限的亲和力,由此混合物随后用碱部分中和。 固化时的这种组合物提供具有良好耐盐雾性,耐擦伤性,外观和其它所需物理特性的涂层。