JPS57205417A - Wide-molecular weight distribution novolak type phenol resin and its production - Google Patents

Wide-molecular weight distribution novolak type phenol resin and its production

Info

Publication number
JPS57205417A
JPS57205417A JP8959281A JP8959281A JPS57205417A JP S57205417 A JPS57205417 A JP S57205417A JP 8959281 A JP8959281 A JP 8959281A JP 8959281 A JP8959281 A JP 8959281A JP S57205417 A JPS57205417 A JP S57205417A
Authority
JP
Japan
Prior art keywords
phenol
average
novolak type
phenol resin
wide
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
JP8959281A
Other languages
Japanese (ja)
Inventor
Ryuzo Nakatsuka
Morio Tsuge
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.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co 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 Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP8959281A priority Critical patent/JPS57205417A/en
Publication of JPS57205417A publication Critical patent/JPS57205417A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To produce the titled resin having the lowest possible content of unreacted phenol and having a high average MW, by subjecting a dihydric phenol and an excess of HCHO to the primary condensation in the presence of a solvent under an acidic condition and then effecting the secondary MW-increasing reaction.
CONSTITUTION: To a dihydric phenol are added HCHO in an amount to provide a mol ratio, B/A, of 1.2W2.0, and a solvent (e.g., benzene). Then, the mixture is subjected to a condensation reaction at 90W100°C for 1W4hr under a weakly to strongly acidic condition to a level of unreacted phenol of below 1wt% while the water formed is being removed. Then, the product is subjected to a MW-increasing reaction at 160W240°C for 2W20hr under a condition including the lowest possible water content while the temperature is gradually raised with the increase of viscosity to obtain a novolak type phenol resin having a number- average MW (excluding unreacted phenol) ≥1,500 and a weight-average MW (excluding unreacted phenol)/number-average MW ratio of 3.0W5.0.
COPYRIGHT: (C)1982,JPO&Japio
JP8959281A 1981-06-12 1981-06-12 Wide-molecular weight distribution novolak type phenol resin and its production Pending JPS57205417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8959281A JPS57205417A (en) 1981-06-12 1981-06-12 Wide-molecular weight distribution novolak type phenol resin and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8959281A JPS57205417A (en) 1981-06-12 1981-06-12 Wide-molecular weight distribution novolak type phenol resin and its production

Publications (1)

Publication Number Publication Date
JPS57205417A true JPS57205417A (en) 1982-12-16

Family

ID=13975043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8959281A Pending JPS57205417A (en) 1981-06-12 1981-06-12 Wide-molecular weight distribution novolak type phenol resin and its production

Country Status (1)

Country Link
JP (1) JPS57205417A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019510123A (en) * 2016-03-09 2019-04-11 スミトモ、ベークライト、ユーロップ、ナムローゼ、フェンノートシャップＳｕｍｉｔｏｍｏ Ｂａｋｅｌｉｔｅ Ｅｕｒｏｐｅ Ｎ．Ｖ． Method for producing novolak alkylphenol resin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019510123A (en) * 2016-03-09 2019-04-11 スミトモ、ベークライト、ユーロップ、ナムローゼ、フェンノートシャップＳｕｍｉｔｏｍｏ Ｂａｋｅｌｉｔｅ Ｅｕｒｏｐｅ Ｎ．Ｖ． Method for producing novolak alkylphenol resin

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