Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst Ag.filedCriticalHoechst Ag.
Publication of YU180090ApublicationCriticalpatent/YU180090A/en
Non-Metallic Protective Coatings For Printed Circuits
(AREA)
Abstract
ZMES, KI SE DA POLIMERIZIRATI S SEVANJEM, IN POSTOPEK ZA IZDELAVO SPAJKALNE KRITNE MASKE. Opisana je zmes, ki se da polimerizirati s sevanjem, ki vsebuje polimerizabilno spojino, polimerno vezivo, ki vsebuje enote metakrilne kisline, estra metakrilne kisline, in stirola zadnja dva v deležu od 40 do 65 mas.%, mineralni pigment v obliki finih delcev na kremenični oz.silikatni osnovi, fotopolimerizacijski iniciator, spojino z najmanj dvema epoksi skupinama v molekuli in termično trdilo za epoksi skupine. Zmes je primerna zlasti za izdelavo spajkalnih kritnih mask in jo lahko po slikovno ustrezni osvetljitvi in razvijanju s segrevanjem na 80 do 150В° C strdimo v šablono, ki je rezistentna v pogojih spajkanja.RADIATION POLYMERIZABLE MIXTURE AND PROCEDURE FOR MAKING SOLDERING COVER MASK. Describes a mixture that can be polymerized by radiation, containing a polymerizable compound, a polymeric binder containing units of methacrylic acid, methacrylic acid ester, and styrene, the latter two in a proportion of 40 to 65% by weight, a mineral pigment in the form of fine particles per a silica or silicate base, a photopolymerization initiator, a compound with at least two epoxy groups in the molecule and a thermal hardener for epoxy groups. The mixture is particularly suitable for the production of solder cover masks and can be cured in a template that is resistant to soldering conditions after pictorially appropriate lighting and development by heating to 80 to 150 ° C.
YU180090A1989-09-211990-09-21
RADIATING POLYMERIZABLE MIXTURE AND PROCESS FOR MAKING A SOLDERING COVER MASK
YU180090A
(en)
PROCESS FOR FORMING A BRICK; PRESS FOR FORMING BRICKS; EQUIPMENT FOR USE IN THE MANUFACTURE OF BRICKS; TEMPLATE FOR BRICKS; AND PROCESS FOR APPLICATION AND REPLACEMENT OF A WEARING COATING