Polymerization of Oriental Lacquer (Urushi) with Epoxidized Linseed Oil as a New Reactive Diluent

Table 1

Viscosity of kurome lacquer paint with epoxidized linseed oil.

	Epoxidized linseed oil			Viscosity of mixture^b; mPa·s
Number		Degree of epoxidation^a; %	Viscosity; mPa·s
1	ELO-6				6.4	51.4	2382
2	ELO-25	24.8	109.9	3866
3	ELO-43	42.6	183.1	4246
4	ELO-100	100	601.7	6904
5	LO	—	51.0	2983^c
6	None		—	4598

The degree of epoxidation was calculated from ¹H NMR spectra.
^bEpoxidized linseed oils (ELO) were mixed in the kurome lacquer (KL) paint in the weight proportion of 1 : 10 and then viscosity was measured by the DV-II+ viscometer at room temperature.
^cPhase separation occurred.