JPS54144495A - Preparation of modified resol-type phenolic resin and phenolic resin varnish - Google Patents

Preparation of modified resol-type phenolic resin and phenolic resin varnish

Info

Publication number
JPS54144495A
JPS54144495A JP5244678A JP5244678A JPS54144495A JP S54144495 A JPS54144495 A JP S54144495A JP 5244678 A JP5244678 A JP 5244678A JP 5244678 A JP5244678 A JP 5244678A JP S54144495 A JPS54144495 A JP S54144495A
Authority
JP
Japan
Prior art keywords
phenolic resin
preparation
varnish
cyclic lactam
added
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP5244678A
Other languages
Japanese (ja)
Inventor
Kohei Kodera
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5244678A priority Critical patent/JPS54144495A/en
Publication of JPS54144495A publication Critical patent/JPS54144495A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

PURPOSE: The title resin or varnish punchable at a low temperature, free from cracking in punching, and ply separation around the punched holes, obtained by adding a cyclic lactam during or after the preparation of resol-type phenolic resin or phenolic resin varnish.
CONSTITUTION: A given amount of a cyclic lactam is added to a resol-type phenolic resin or phenolic resin varnish (P) previously prepared from a phenol and an aldehyde, or the cyclic lactam is partly added to the reaction system during the preparation of P, and the rest is added after the preparation of P. Available ε-caprolactam having a suitable melting point is preferred as the cyclic lactam.
COPYRIGHT: (C)1979,JPO&Japio
JP5244678A 1978-04-30 1978-04-30 Preparation of modified resol-type phenolic resin and phenolic resin varnish Pending JPS54144495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5244678A JPS54144495A (en) 1978-04-30 1978-04-30 Preparation of modified resol-type phenolic resin and phenolic resin varnish

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5244678A JPS54144495A (en) 1978-04-30 1978-04-30 Preparation of modified resol-type phenolic resin and phenolic resin varnish

Publications (1)

Publication Number Publication Date
JPS54144495A true JPS54144495A (en) 1979-11-10

Family

ID=12914949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5244678A Pending JPS54144495A (en) 1978-04-30 1978-04-30 Preparation of modified resol-type phenolic resin and phenolic resin varnish

Country Status (1)

Country Link
JP (1) JPS54144495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04126759A (en) * 1990-09-17 1992-04-27 Lignyte Co Ltd Phenolic resin molding material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04126759A (en) * 1990-09-17 1992-04-27 Lignyte Co Ltd Phenolic resin molding material

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