Light diffusive coating, a method of forming the coating and a l

Details Light diffusive coating, a method of forming the coating and a l Light diffusive coating, a method of forming the coating and a l

1987-09-21

1989-09-26

Bell, Janyce

Coating processes

Electrical product produced

Hollow article

4271262, 4271263, 427164, 427165, 427226, B05D 512

Patent

active

048699276

ABSTRACT:
A light diffusive coating having an excellent light diffusion effect, a method of forming the coating and a halogen lamp with the coating. The light diffusive coating includes bubbles with a continuous coating consisting of a metal oxide formed on a base. The method of forming the light diffusive coating is made by the inclusion of bubbles formed by the evaporization of a high boiling-point organic solvent within the metal oxide coating formed by the application of a combination of an organo-metallic compound with a high boiling-point organic solvent to a base surface, and the subsequent decomposition of the organo-metallic compound on baking. The halogen lamp has a porous light diffusive coating formed on the coating established on the surface of the outer vessel which allows visible light to pass through but reflects infra-red light, so that strain, caused by the difference in thermal expansion efficient of the structural material of the outer vessel and the structural material of the light diffusive layer occuring when the outer vessel is at a high temperature, is absorbed by the porous structure, and prevents peeling.

REFERENCES:
patent: 2904457 (1959-09-01), Fridrich
patent: 3617341 (1971-11-01), Fefferman
patent: 3617794 (1971-11-01), Van Bakel
patent: 4382980 (1983-05-01), Donohue
patent: 4457957 (1984-07-01), Novak et al.

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