Vinyl chloride-based polymer composition and method for producing the same
AssigneeLG Chem, Ltd.
InventorsJung Rae LEE, Kyung Seog YOUK, Heung Kwon BAE, Hyun Min LEE
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Abstract
The present invention relates to a vinyl chloride-based polymer composition and a method for producing the same, and more particularly, to a vinyl chloride-based polymer composition including a vinyl chloride-based polymer and a plasticizer, wherein the vinyl chloride-based polymer includes a higher fatty acid having 10 to 18 carbon atoms in an amount of more than 0.05 parts by weight to less than 2.0 parts by weight, based on 100 parts by weight of the vinyl chloride-based polymer.
Claims14
A vinyl chloride-based polymer composition comprising:
- a vinyl chloride-based polymer;
- and a plasticizer,
- wherein the vinyl chloride-based polymer includes a higher fatty acid having 10 to 18 carbon atoms in an amount of more than 0.05 parts by weight and less than 2.0 parts by weight, based on 100 parts by weight of the vinyl chloride-based polymer;
- a Bingham yield stress under an external force increasing condition is more than 111 Pa and less than 385 Pa;
- a Bingham yield stress under an external force decreasing condition is more than 97 Pa and less than 362 Pa;
- and a difference in Bingham yield stress value between the external force increasing condition and the external force decreasing condition is more than 0 Pa and 35 Pa or less.
A method for producing a vinyl chloride-based polymer composition, the method comprising the steps of:
- (S1) producing a vinyl chloride-based polymer latex including a vinyl chloride-based polymer;
- (S2) adding a higher fatty acid having 10 to 18 carbon atoms to the produced vinyl chloride-based polymer latex and stirring the mixture;
- (S3) drying the stirred vinyl chloride-based polymer latex to obtain a vinyl chloride-based polymer powder;
- and
- (S4) stirring the vinyl chloride-based polymer powder with a plasticizer to produce the vinyl chloride-based polymer composition,
- wherein the higher fatty acid is added in an amount of more than 0.05 parts by weight to less than 2.0 parts by weight, based on 100 parts by weight (based on solid content) of the vinyl chloride-based polymer;
- the vinyl chloride-based polymer composition produced in the step (S4) has Bingham yield stress of more than 111 Pa and less than 385 Pa under an external force increasing condition and Bingham yield stress of 97 Pa and less than 362 Pa under an external force decreasing condition;
- and a difference in Bingham yield stress value between the external force increasing condition and the external force decreasing condition is more than 0 Pa and 35 Pa or less.
Dependencies are inferred from the claim text.