Synthesis and Properties of a High-Molecular-Weight Organosoluble Bisphenol A Novolac

Development of lignin as a transparent resin: evaluation of thermal and optical properties of alkoxylated lignophenols

“…These groups were easier to be decomposed by heating than protected hydroxyl groups; therefore, the thermal stability of unprotected LP was less than those of alkoxylated LP (2-5). In our previous report, 20 the weight decrease of a conventional phenol novolac (ca. M n ¼1500) started below 150 1C due to degradation around the phenolic hydroxy groups.…”

New class of reactive novolac: synthesis of bisphenol A-based novolac with methylol groups

“…34 The phenolic resin with a low-molecular weight (4) was prepared according to the previous report. [12][13][14][15][16][17] Addition-condensation of 2,2-bis(4-methoxyphenyl)propane (1) with formaldehyde. To a mixture of 1 (1.28 g, 5 mmol) and paraformaldehyde (0.30 g, 10 mmol as a formaldehyde unit) were added acetic acid (AcOH, 2 ml) and chloroform (CHCl 3 , 3 ml).…”

“…These resins have interesting properties that make them suitable for industrial use, such as thermostability and mechanical strength. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] During the curing of novolacs, hexamethylenetetramine (HMTA) is frequently used as the curing agent; 1 however, the resultant curing products usually tend to contain amine derivatives and the unreacted curing agent as impurities, which often lead to coloration and degradation of the products.…”

Functionalization of lignin: Synthesis of lignophenol‐graft‐poly(2‐ethyl‐2‐oxazoline) and its application to polymer blends with commodity polymers

“…We succeeded in developing a phase‐separation system (2‐step process II) that can produce processable and organosoluble lignophenol (LP) 21–26. The structure of LP is similar to that of artificial phenolic resins,27–37 which are often used as plastics, adhesives, cures, etc. Being a natural polymer‐based plastic, LP is considered to be a substitute for commodity polymers derived from fossil fuels.…”