Methacrylic resin, molded article thereof, and method for producing methacrylic resin
AssigneeAsahi Kasei Chemicals Corporation
InventorFumiki Murakami
Life of this patent
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Abstract
A methacrylic resin, including 80 to 99.5% by mass of a methacrylic acid ester monomer unit, and 0.5 to 20% by mass of other vinyl monomer unit which is copolymerizable with at least one of the methacrylic acid ester, wherein the methacrylic resin satisfies the following conditions (I) to (III): (I) having a weight average molecular weight measured by gel permeation chromatography (GPC) of 60,000 to 300,000; (II) having a content of a molecular weight component 1/5 or less the peak molecular weight (Mp) obtained from a GPC elution curve, said content being 7 to 40% based on a region area ratio obtained from the GPC elution curve; and (III) having an angle of repose of 20 to 40°.
Claims13
A methacrylic resin, comprising:
- 80 to 99.5% by mass of a methacrylic acid ester monomer unit;
- and
- 0.5 to 20% by mass of other vinyl monomer unit which is copolymerizable with at least one of the methacrylic acid ester,
- wherein the methacrylic resin satisfies the following conditions (I) to (III):
- (I) having a weight average molecular weight measured by gel permeation chromatography (GPC) of 60,000 to 300,000;
- (II) having a content of a molecular weight component 1/5 or less a peak molecular weight (Mp) obtained from a GPC elution curve, said content being 7 to 40% based on a region area ratio obtained from the GPC elution curve;
- and
- (III) having an angle of repose of 20 to 40°.
A methacrylic resin, comprising:
- 80 to 99.5% by mass of a methacrylic acid ester monomer unit;
- and
- 0.5 to 20% by mass of other vinyl monomer unit which is copolymerizable with at least one of the methacrylic acid ester,
- wherein the methacrylic resin has a moisture content measured by a Karl Fischer method of 0.1 to 1.0% by mass and the methacrylic resin satisfies the following conditions (I) to (III):
- (I) having a weight average molecular weight measured by gel permeation chromatography (GPC) of 60,000 to 300,000;
- (II) having a content of a molecular weight component 1/5 or less a peak molecular weight (Mp) obtained from a GPC elution curve, said content being 7 to 40% based on a region area ratio obtained from the GPC elution curve;
- and
- (III) having an angle of repose of 20 to 40°.
Dependencies are inferred from the claim text.