Composition of at least one vinylidene chloride polymer
AssigneeSolvay (Societe Anonyme)
InventorsPascal Dewael, Christophe Fringant, Yves Vanderveken
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Abstract
Vinylidene chloride polymer composition characterized in that it comprises: (A) at least one vinylidene chloride polymer; (B) from 1 to 50% by weight, relative to the total weight of the composition, of at least one ε-caprolactone polymer, of which at least one is characterized by a molecular weight less than or equal to 10 000 g/mol; and (C) from 0.1 to 7% by weight, relative to the total weight of the composition, of epoxidized soybean oil. Process for preparing said composition; process for preparing articles, in particular films, which includes the use of said composition. Single-layer or multilayer film comprising said composition and packaging or bag formed from this film.
Claims16
1- A vinylidene chloride polymer composition comprising:
- (A) at least one vinylidene chloride polymer;
- (B) from 1 to 50% by weight, relative to the total weight of the composition, of at least one ε-caprolactone polymer, of which at least one is characterized by a molecular weight less than or equal to 10 000 μg/mol;
- and
- (C) from 0.1 to 7% by weight, relative to the total weight of the composition, of epoxidized soybean oil.
2- The composition according to claim 1, comprising a single vinylidene chloride polymer.
3- The composition according to claim 2, wherein the vinylidene chloride polymer is a copolymer composed of vinylidene chloride in an amount of at least 50 wt % and at least one comonomer chosen from (meth)acrylic monomers corresponding to the general formula
- CH2═CR1R2
- wherein R1 is chosen from hydrogen and the methyl radical;
- and wherein R2 is the —CO—R3 radical in which R3 is chosen from the —OH radical and —O—R4 radicals, with R4 being chosen from linear or branched alkyl radicals containing from 1 to 18 carbon atoms optionally bearing one or more —OH radicals, epoxyalkyl radicals containing from 2 to 10 carbon atoms, and alkoxyalkyl containing a total of 2 to 10 carbon atoms.
4- The composition according to claim 3, wherein the vinylidene chloride polymer is a copolymer composed of vinylidene chloride in an amount of at least 50 wt % and methyl acrylate.
5- The composition according to claim wherein said composition mainly consists of:
- (A) at least one vinylidene chloride polymer;
- (B) from 1 to 50% by weight, relative to the total weight of the composition, of at least one ε-caprolactone polymer, of which at least one ε-caprolactone polymer is characterized by a molecular weight less than or equal to 10,000 g/mol;
- and
- (C) from 0.1 to 7% by weight, relative to the total weight of the composition, of epoxidized soybean oil.
6- The composition according to claim 1, wherein at least one ε-caprolactone polymer is characterized by a molecular weight less than or equal to 8,500 g/mol.
7- The composition according to claim 1, characterized in that wherein the total amount of ε-caprolactone polymer(s) is between 3 and 15% by weight relative to the total weight of the composition.
8- A process for preparing the composition according to claim 1, which comprises the mixture of (A), (B) and (C) via premixing.
9- A process for preparing the composition according to claim 1, which comprises the mixture of (A) containing (C), and (B) via premixing.
10- A process for preparing articles which includes the use of the composition according to claim 1.
11- The process according to claim 10, wherein the articles are single-layer or multilayer films.
12- A single-layer or multilayer film which comprises the composition according to claim 1.
13- The film according to claim 12 which comprises a barrier layer comprising the composition according to claim 1.
14- A packaging or bag formed from a film according to either claim 12.
15- The packaging or bag according to claim 14, intended for food packaging or medical use.
16- The packaging or bag according to claim 15, intended for cheese packaging.