公开(公告)号：US4844976A

公开(公告)日：1989-07-04

申请号：US151541

申请日：1988-02-18

Applicant: Tzuli J. Huang

Inventor： Tzuli J. Huang

IPC: B32B15/08 ,  B32B3/18 ,  B32B7/02 ,  B32B17/10 ,  B32B27/18 ,  B32B27/20 ,  B32B27/30 ,  B32B27/40 ,  C08G18/08 ,  C08G18/75 ,  C08G18/83 ,  C08J3/215 ,  C08K3/36 ,  C09D175/04 ,  E01F9/04 ,  E01F9/06 ,  G02B1/10 ,  G02B5/12

CPC classification number: G02B5/12 ,  C08G18/0823 ,  C08G18/758 ,  C08G18/833 ,  C08J3/215 ,  C08K3/36 ,  C09D175/04 ,  E01F9/512 ,  E01F9/553 ,  G02B1/10 ,  G02B1/105 ,  C08J2375/04 ,  Y10S428/913 ,  Y10T428/25 ,  Y10T428/259 ,  Y10T428/2982

Abstract: Retroreflective sheeting has been improved by a coating comprising silica and a transparent polymer selected from aliphatic polyurethanes, polyvinyl chloride copolymers having a minor amount of a comonomer containing at least one carboxylic acid or hydroxyl moiety, and acrylic polymers. Silica comprises 10-80 weight percent (10-70% in the case of polyacrylates) of the transparent protective coating. For example, a solution or dispersion of polyurethane is mixed with a silica sol and possibly other ingredients (e.g. wetting agent, UV light absorber and adhesion promoter), and the composition is coated onto the retroreflective sheet and dried. The coated retroreflective sheeting has superior soil and dew repellancy, retaining a higher percentage of original brightness after exposure to dirt and/or dew conditions.

公开(公告)号：US5073404A

公开(公告)日：1991-12-17

申请号：US555380

申请日：1990-07-20

Applicant: Tzuli J. Huang

Inventor： Tzuli J. Huang

IPC: C08G18/08 ,  C08G18/75 ,  C08G18/83 ,  C08J3/215 ,  C09D175/04 ,  E01F9/06 ,  G02B1/10

CPC classification number: C08J3/215 ,  C08G18/0823 ,  C08G18/758 ,  C08G18/833 ,  C09D175/04 ,  E01F9/553 ,  G02B1/105 ,  C08J2375/04

Abstract: Retroreflective sheeting has been improved by a coating comprising silica and a transparent polymer selected from aliphatic polyurethanes, polyvinyl chloride copolymers having a minor amount of a comonomer containing at least one carboxylic acid or hydroxyl moiety, and acrylic polymers. Silica comprises 10-80 weight percent (10-70% in the case of polyacrylates) of the transparent protective coating. For example, a solution or dispersion of polyurethane is mixed with a silica sol and possibly other ingredients (e.g. wetting agent, UV light absorber and adhesion promoter), and the composition is coated onto the retroreflective sheet and dried. The coated retroreflective sheeting has superior soil and dew repellancy, retaining a higher percentage of original brightness after exposure to dirt and/or dew conditions.

Abstract translation: 通过包含二氧化硅和选自脂族聚氨酯的透明聚合物，具有少量含有至少一个羧酸或羟基部分的共聚单体的聚氯乙烯共聚物和丙烯酸聚合物的涂层，改进了逆反射片材。 二氧化硅包含10-80重量％（在聚丙烯酸酯的情况下为10-70％）的透明保护涂层。 例如，将聚氨酯的溶液或分散体与二氧化硅溶胶和可能的其他成分（例如润湿剂，UV光吸收剂和粘合促进剂）混合，并将组合物涂布到定向反光片上并干燥。 涂覆的回射片材具有优异的防污和防水性能，在暴露于污垢和/或露水条件后保持较高的原始亮度百分比。