The present disclosure provides a composition for preparing a vinyl chloride-based polymer, including a vinyl chloride-based first seed; a vinyl chloride-based second seed; an initiator composition including a water-soluble initiator and an oil-soluble initiator; a reducing agent; and a vinyl chloride-based monomer, wherein a metal catalyst is not included in the composition, and a method for preparing a vinyl chloride-based polymer using the same.

The present invention relates to a precursor composition for (meth) acrylic thermoplastic composites, its method of preparation and its use. In particular it relates to a semi-fabricated composition comprising a (meth) acrylic polymer, a monomer, a fibrous material and at least one initiator. More particularly the present invention relates to a precursor composition comprising a (meth) acrylic polymer, a monomer, a fibrous material and at least two initiators. The present invention relates also to a method of preparation of a composition comprising a (meth) acrylic polymer, a monomer, a fibrous material and at least two initiators.

The present invention relates to an initiator mixture, a composition, use thereof, a process of preparing polymer polyol, and a polymer polyol obtained by the process. The initiator mixture comprises: a first peroxide of formula (I) R.sub.1OOR.sub.2, wherein R.sub.1 and R.sub.2 are independent an alkyl group or an alkanoyl group comprising 1 to 30 carbon atoms, preferably 3 to 20 carbon atoms, and more preferably 4 to 20 carbon atoms; and a second peroxide of formula (II) R.sub.3OOR.sub.4OOR.sub.5, wherein R.sub.3 and R.sub.5 are independently an alkyl group comprising 1 to 30 carbon atoms, preferably 3 to 20 carbon atoms, and more preferably 5 to 10 carbon atoms, and R.sub.4 is a cycloalkylene group comprising 3 to 30 carbon atoms, preferably 4 to 20 carbon atoms, and more preferably 5 to 10 carbon atoms.

The present invention relates to an initiator mixture, a composition, use thereof, a process of preparing polymer polyol, and a polymer polyol obtained by the process. The initiator mixture comprises: a first peroxide of formula (I) R.sub.1OOR.sub.2, wherein R.sub.1 and R.sub.2 are independent an alkyl group or an alkanoyl group comprising 1 to 30 carbon atoms, preferably 3 to 20 carbon atoms, and more preferably 4 to 20 carbon atoms; and a second peroxide of formula (II) R.sub.3OOR.sub.4OOR.sub.5, wherein R.sub.3 and R.sub.5 are independently an alkyl group comprising 1 to 30 carbon atoms, preferably 3 to 20 carbon atoms, and more preferably 5 to 10 carbon atoms, and R.sub.4 is a cycloalkylene group comprising 3 to 30 carbon atoms, preferably 4 to 20 carbon atoms, and more preferably 5 to 10 carbon atoms.

The present disclosure provides a method of preparing a vinyl chloride-based polymer having improved processability due to excellent blendability, and the vinyl chloride-based polymer having a particle non-uniformity of 10 or more defined by Equation 1.

[00001]$\begin{array}{cc}\mathrm{Particle}.Math..Math.\mathrm{non}.Math.\text{-}.Math.\mathrm{uniformity}.Math.\left[E\left(X\right)\right]=\frac{1}{50}.Math.\underset{i=1}{\overset{50}{.Math.}}.Math.X_i& \left[\mathrm{Equation}.Math..Math.1\right]\end{array}$

A composition comprising an ethylene/CO interpolymer, formed from a high pressure, free-radical polymerization, and wherein the ethylene/CO interpolymer has the following properties: a) a CO content from greater than 0 weight percent to less than, or equal to, 10 weight percent CO (carbon monoxide), based on the weight of the interpolymer; and b) a melting point, Tm, in C. that meets the following relationship: Tm ( C.)601.4*(Density in g/cc)452.5( C.).

A composition comprising an ethylene/CO interpolymer, formed from a high pressure, free-radical polymerization, and wherein the ethylene/CO interpolymer has the following properties: a) a CO content from greater than 0 weight percent to less than, or equal to, 10 weight percent CO (carbon monoxide), based on the weight of the interpolymer; and b) a melting point, Tm, in C. that meets the following relationship: Tm ( C.)601.4*(Density in g/cc)452.5( C.).

A polyethylene homopolymer comprising the following properties: a) a melt index (I2) from 1.0 to 3.5 dg/min; b) a Mw(abs) versus I2 relationship: Mw(abs)A+B(I2), where A=3.2010.sup.5 g/mole, and B=8.0010.sup.3 (g/mole)/(dg/min); c) a Mw(abs) versus I2 relationship: Mw(abs)C+D(I2), where C=3.9010.sup.5 g/mole, and D=8.0010.sup.3 (g/mole)/(dg/min).

A polyethylene homopolymer comprising the following properties: a) a melt index (I2) from 1.0 to 3.5 dg/min; b) a Mw(abs) versus I2 relationship: Mw(abs)A+B(I2), where A=3.2010.sup.5 g/mole, and B=8.0010.sup.3 (g/mole)/(dg/min); c) a Mw(abs) versus I2 relationship: Mw(abs)C+D(I2), where C=3.9010.sup.5 g/mole, and D=8.0010.sup.3 (g/mole)/(dg/min).

An ethylene vinyl acetate copolymer with a high degree of cross-linking and a method of preparing the same are provided, by controlling a temperature and polymerization heat in an autoclave reactor during polymerization, even when a reduced amount of a cross-linking agent is used.