Polyvinyl alcohol resin composition and films
AssigneeThe Nippon Synthetic Chemical Industry Co., Ltd.
InventorsMitsuo Shibutani, Norihito Sakai
Life of this patent
Estimating the term…
Abstract
A PVA resin composition is provided which is excellent in melt-formability and free from emanation of odor in a melt-forming process, and is capable of providing a product free from residual odor, a highly transparent film and a laminate film having higher interlayer adhesive strength. The resin composition comprises: (A) a polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following formula (1): and having a saponification degree of 80 to 97.9 mol %; and (B) an alkylene oxide adduct of a polyvalent alcohol containing 5 to 9 moles of an alkylene oxide per 1 mole of the polyvalent alcohol.
Claims12
A resin composition comprising:
- (A) a polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following formula (1):
- and having a saponification degree of 80 to 97.9 mol %;
- and
- (B) an alkylene oxide adduct of a polyvalent alcohol containing 6 to 9 moles of an alkylene oxide per 1 mole of the polyvalent alcohol,
- wherein the alkylene oxide adduct of a polyvalent alcohol (B) has a hydroxyl value of 200 to 1500 mg KOH/g.
A film composed of a resin composition comprising:
- (A) a polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following formula (1):
- and having a saponification degree of 80 to 97.9 mol %;
- and
- (B) an alkylene oxide adduct of a polyvalent alcohol containing 6 to 9 moles of an alkylene oxide per 1 mole of the polyvalent alcohol,
- wherein the alkylene oxide adduct of a polyvalent alcohol (B) has a hydroxyl value of 200 to 1500 mg KOH/g.
A laminate film comprising a plurality of layers, at least one of which is composed of a resin composition comprising:
- (A) a polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following formula (1):
- and having a saponification degree of 80 to 97.9 mol %;
- and
- (B) an alkylene oxide adduct of a polyvalent alcohol containing 6 to 9 moles of an alkylene oxide per 1 mole of the polyvalent alcohol,
- wherein the alkylene oxide adduct of a polyvalent alcohol (B) has a hydroxyl value of 200 to 1500 mg KOH/g.
Dependencies are inferred from the claim text.