| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide heat-resistant sheets and molded bodies useful in such fields as everyday items, civil engineering and construction materials, electronic and electric members and automotive members by using polyethylene terephthalate (PET) polyesters modified to a long chain branched structure and block-copolymerized with another polyester or a polyolefin. <P>SOLUTION: A mixture comprising (a) 100 pts.wt. PET polyester, (b) 0-100 pts.wt. other polyester or polyolefin containing carboxylic acid groups, (c) 1-15 pts.wt. master batch of a mixture with 0-75/100-25 weight ratio of at least a trifunctional epoxy compound/bifunctional epoxy compound as a bonding agent and (d) 0.25-10 pts.wt. master batch of a composite body of organic acid metal salts as a bonding catalyst, is modified to a long chain branched structure with a fast crystallization speed by a reaction extrusion method to prepare a block copolymer with a melt viscosity increased at least 10 times of a conventional PET with a linear structure. <P>COPYRIGHT: (C)2003,JPO</p> |
