Claims
- 1. A thermoplastic resin comprising a block copolymer composed of amorphous polyester segments consisting essentially of an aromatic dicarboxylic acid component and an aromatic diol component, and vinyl polymer segments formed from at least one monomer selected from styrene, a derivative thereof and a vinyl monomer copolymerizable therewith, wherein styrene and/or the derivative thereof is present in an amount of not less than 50 mole %.
- 2. A thermoplastic resin as claimed in claim 1 wherein the diol component constituting the polyester segments consist essentially of 2,2'-bis(4-hydroxyphenyl)propane.
- 3. A thermoplastic resin as claimed in claim 1 wherein the dicarboxylic acid component constituting the polyester segments consist essentially of terephthalic acid and/or isophthalic acid.
- 4. A thermoplastic resin as claimed in claim 1 which has high resistance to moisture absorption and excellent optical properties and wherein the diol component constituting the polyester segments consists essentially of 2,2-bis(4-hydroxyphenyl)propane, and the dicarboxylic acid component constituting the polyester segment consists essentially of terephthalic acid and/or isophthalic acid.
- 5. A thermoplastic resin as claimed in claim 1 wherein the polyester segments and the vinyl polymer segments are present in a weight ratio ranging from 80:20 to 20:80.
- 6. An optical resin comprising a block copolymer composed of at least one amorphous polyester segment formed essentially from 2,2-bis(4-hydroxyphenyl)propane and terephthalic acid and/or isophthalic acid, and at least one vinyl polymer segment comprising a polystyrene resin.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-212992 |
Sep 1986 |
JPX |
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Parent Case Info
This is a division of application No. 07/094,444, filed Sept. 9, 1987, now abandoned.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
Sorenson, W. R., et al., Preparative Methods of Polymer Chemistry, Interscience Publishers NY, pp. 90-92, 137-138, (1968). |
Divisions (1)
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Number |
Date |
Country |
Parent |
94444 |
Sep 1987 |
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