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Title:
UNDERWATER ANTIFOULING MATERIAL, MELT-MOULDED ARTICLE AND COATING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2011/132537
Kind Code:
A1
Abstract:
Disclosed is an underwater antifouling material containing polyglycolic acid obtained by ring-opening polymerisation of 70-100 wt% glycolide and 30-0 wt% of another cyclic monomer. The polyglycolic acid is characterised in that: (a) weight-average molecular weight is 30,000-800,000; (b) molecular weight distribution, representing the ratio (Mw/Mn) of weight-average molecular weight (Mw) and number average molecular weight (Mn), is 1.5-4.0; (c) terminal carboxyl group concentration is 6-200eq/106g; (d) residual glycolide quantity is 0.2 wt% or less; and (e) starting temperature for 1% thermal weight reduction is 210°C or greater; and further, preferably, (f) the melt viscosity maintenance ratio, defined as the ratio [(η60/η0)x100] of the degree of initial melt viscosity (η0) measured after maintaining at 250°C for 5 minutes and the degree of melt viscosity (η60) measured after maintaining at 250°C for 60 minutes, is 40% or greater. Also disclosed are a moulded article thereof, a coating material and a laminated body.

Inventors:
YAMANE KAZUYUKI (JP)
SUZUKI TAKEHISA (JP)
Application Number:
PCT/JP2011/058771
Publication Date:
October 27, 2011
Filing Date:
April 07, 2011
Export Citation:
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Assignee:
KUREHA CORP (JP)
YAMANE KAZUYUKI (JP)
SUZUKI TAKEHISA (JP)
International Classes:
C08G63/08; C09D5/16; C09D167/04; D01F6/62
Foreign References:
JP2008101031A2008-05-01
JPH11255869A1999-09-21
JPH11240941A1999-09-07
JPH0616972A1994-01-25
JPS5867767A1983-04-22
Attorney, Agent or Firm:
NOMURA Yasuhide et al. (JP)
Yasuhide Nomura (JP)
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