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Title:
LAMINATE
Document Type and Number:
Japanese Patent JPS61236836
Kind Code:
A
Abstract:

PURPOSE: To provide a laminate of improved flame retardancy, tracking resistance, punching processability, etc., for use in printed circuit base, constituted by resin-impregnated papers prepared by primary impregnation of base paper with specific resin consisting of cocondensate such as melamine resin followed by secondary impregnation with another resin.

CONSTITUTION: The objective laminate can be obtained by impregnating a paper base (e.g., kraft paper) with (A) a resin of a solvent admixture degree 50W1,000% prepared by cocondensation between A1: 1mol of melamine, A2: 1.5W5moles of an aldehyde compound (e.g., formaldehyde), A3: 0.05W0.5mol of a glycoside of formula I or II (R1 and R2 are each alkyl) and A4: a phenolic compound, followed by impregnation with (B) a second resin (e.g., phenolic resin).


Inventors:
IZUMI HIDEO
Application Number:
JP8108685A
Publication Date:
October 22, 1986
Filing Date:
April 15, 1985
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
C08G14/00; C08G14/06; C08G14/10; C08J5/24; H05K1/03; (IPC1-7): C08G14/10; C08J5/24
Attorney, Agent or Firm:
Takehiko Matsumoto