Using the dilute acid hydrolysis lignin and straw alkali lignin as materials and selecting many kinds of polyols as esterification agents,a series of hydroxyl containing lignin polyesters with various chain length were synthesized.

This article introduces the technology of trimming the aditus department of the thin-wall barrel-type piece based on the principles of transversal truncation about the polyurethane rubber.

Adopting polyurethane and wooden bolt to ahead strengthen three soft seam wall can efficiently control coal wall fall at combined face,speed up the mining speed.

The details were described in the developrnent of magnetic materials and foamed polyurethane plastics through determination of the geometry of dispersed phase in the materials by image analysis.

Research development of silicone modified polyester resin.;

PET polyester resins used in the wet end at neutral-alkaline papermaking conditions;

Investigation of polyester resin used heat-pouring bottle;

Wear Resistance of Diamond-like-carbon Films on the Polycarbonate Substrate;

Introduction of new type resin-vinyl polyester resin;

A high durable polyester for coil coatings was prepared.