Thermoplastic polymer composition
AssigneeKuraray Co., Ltd.
InventorHidekazu Saito
Life of this patent
Estimating the term…
Abstract
The present invention provides a thermoplastic polymer composition mainly comprising a block copolymer prepared by extending, with a specific polyurethane component, the polymer chain of a block copolymer, which may be hydrogenated, having a polymer block of an aromatic vinyl compound and a polymer block of a conjugated diene. The thermoplastic polymer composition according to the present invention is excellent in handling properties and melt-moldability, because it shows non-tackiness. By using the thermoplastic polymer composition according to the present invention, a molded article having high qualities can be produced with good productivity.
Claims13
A thermoplastic polymer composition comprising a block copolymer (a) having a polymer block (I) of a block copolymer, which may be hydrogenated, of an aromatic vinyl compound polymer block and a conjugated diene polymer block, and a polymer block (II) of a polyurethane formed of a high polymer polyol, a chain extender and an organic diisocyanate;
- at least one compound (b) selected from organic tin compounds, organic titanium compounds and tertiary amines;
- and at least one compound (c) of a phosphorus compound and a phenolic compound and satisfying the following conditions (A) to (E):
- (A):
- The high polymer polyol has a number average molecular weight of 500 to 10,000;
- (B):
- The content of nitrogen derived from the organic diisocyanate in the polymer block (II) is within the range of 1 to 6.5% by weight based on the total weight of the high polymer polyol, the chain extender and the organic diisocyanate;
- (C):
- The content of the compound (b) is from 0.1 ppm to 0.2% by weight based on the block copolymer (a).
- (D):
- The content of the compound (c) is from 1 ppm to 2% by weight based on the block copolymer (a);
- and
- (E):
- The melt viscosity of the thermoplastic polymer composition meets the following equation (I):
- 0.9≦7ηa2/ηa1≦1.4 (I)
- ;
- wherein ηa1 means a melt viscosity of the thermoplastic polymer composition when the urethane bond contained therein reaches to dissociation equilibrium at 200° C. under the load of 490.3 N [50 kgf], and ηa2 means a melt viscosity of the thermoplastic polymer composition when kept at 200° C. under the load of 490.3 N [50 kgf] for 60 minutes.
A method for producing a thermoplastic polymer composition comprising [i] subjecting at least one block copolymer (a1) selected from block copolymers, which may be hydrogenated, having an aromatic vinyl compound polymer block, a conjugated diene polymer block and a terminal functional group reactive with at least one component selected from high polymer polyols, chain extenders and organic diisocyanates, to the reaction with a high polyol having a number average molecular weight of 500 to 10,000, a chain extender and an organic diisocyanate in the presence of at least one compound (b) selected from organic tin compounds, organic titanium compounds and tertiary amines;
- and [ii] adding at least one compound (c) of a phosphorus compound and a phenolic compound, to the resulting product, wherein the following conditions (i) to (iv) are satisfied:
- i) The weight ratio of the block copolymer (a1) based on the total weight of the high polymer polyol, the chain extender and the organic diisocyanate is in the range of 10:90 to 90:10;
- ii) The content of nitrogen derived from the organic diisocyanate is in the range of 1 to 6.5% by weight based on the total weight of the high polymer polyol, the chain extender and the organic diisocyanate;
- iii) The amount of the compound (b) is from 0.1 ppm to 0.2% by weight based on the total weight of the block copolymer (a1), the high polymer polyol, the chain extender and the organic diisocyanate;
- iv) The amount of the compound (c) is from 1 ppm to 2% by weight based on the total weight of the block copolymer (a1), the high polymer polyol, the chain extender and the organic diisocyanate.
A method for producing a thermoplastic polymer composition comprising [i] subjecting at least one block copolymer (a1) selected from block copolymers, which may be hydrogenated, having an aromatic vinyl compound polymer block, a conjugated diene polymer block and a terminal functional group reactive with at least one component selected from high polymer polyols, chain extenders and organic diisocyanates, to the reaction with a reaction product of a high polymer polyol having a number average molecular weight of 500 to 10,000, a chain extender and an organic diisocyanate, in the presence of at least one compound (b) selected from organic tin compounds, organic titanium compounds and tertiary amines;
- and [ii] adding at least one compound (c) of a phosphorus compound and a phenolic compound, to the resulting product, in which the following conditions (i) to (iv) are satisfied:
- i) The weight ratio of the block copolymer (a1) based on the weight of the reaction product of the high polymer polyol, the chain extender and the organic diisocyanate is in the range of 10:90 to 90:10;
- ii) The content of nitrogen derived from the organic diisocyanate is in the range of 1 to 6.5% by weight based on the total weight of the high polymer polyol, the chain extender and the organic diisocyanate;
- iii) The amount of the compound (b) is from 0.1 ppm to 0.2% by weight based on the total weight of the block copolymer (a1) and the reaction product of the high polymer polyol, the chain extender and the organic diisocyanate;
- iv) The amount of the compound (c) is from 1 ppm to 2% by weight based on the total weight of the block copolymer (a1) and the reaction product of the high polymer polyol, the chain extender and the organic diisocyanate.
Dependencies are inferred from the claim text.