Use of trioxepans in the process to make high-solid acrylic, styrenic, and LDPE-type resins

• US 20020052455A1
• Filed: 08/15/2001
• Published: 05/02/2002
• Est. Priority Date: 08/15/2000
• Status: Active Grant

• Current Assignee: Akzo Nobel N.V. (Nouryon BV)
• Original Assignee: Akzo Nobel N.V. (Nouryon BV)
• Inventors: Meijer, John, Hogt, Andreas H.
• Granted Patent: US 6,720,398 B2
• Time in Patent Office: Days
• US Class Current: 526/227
• CPC Class Codes: C08F 4/34 Per-compounds with one peroxy-radical

Abstract

The invention relates to a polymerisation process wherein at least one initiator is selected from trioxepan compounds of formula I

with R^1-3 being independently selected from substituted or unsubstituted hydrocarbyl groups. Preferably, R¹ and R³ are selected from lower alkyl groups, such as methyl, ethyl, and isopropyl, while R is preferably selected from methyl, ethyl, isopropyl, isobutyl, amyl, isoamyl, cyclohexyl, CH₃C(O)CH₂—, C₂H₅OC(O)CH₂—, HOC(CH₃)₂CH₂—, and

Claims

1. A process wherein one or more monomers are polymerised using at least one initiator selected from trioxepan compounds of formula I

2. A process according to claim 1 wherein R^1-3 are independently selected from the group consisting of hydrogen and substituted or unsubstituted C₁-C₂₀ alkyl, C₃-C₂₀ cycloalkyl, C₆-C₂₀ aryl, C₇-C₂₀ aralkyl, and C₇-C₂₀ alkaryl, which groups may include linear or branched alkyl moieties, while two of the groups R^1-3 may be connected to form a cycloalkyl ring;

the optional one or more substituents on each of R^1-3 being selected from the group consisting of hydroxy, alkoxy, carboxylic acid, linear or branched alkenyl, aryloxy, halogen, ester, carboxy, nitrile, and amido.

3. A process according to claim 2 wherein R¹ and R³ are selected from lower alkyl groups, such as methyl, ethyl, and isopropyl, and R² is selected from hydrogen, methyl, ethyl, isopropyl, iso-butyl, tert-butyl, amyl, iso-amyl, cyclohexyl, phenyl, CH₃C(O)CH₂—

, C₂H₅OC(O)CH₂—

, HOC(CH₃)₂CH₂—

, and

4. A process according to any one of claims 1-3 wherein a high-solid acrylate resin is formed.

5. A process according to any one of claims 1-3 wherein a styrenic resin is formed from a monomer mixture comprising at least 40% by weight of styrene.

6. A process according to any one of claims 1-3 wherein ethylene is radically polymerised or copolymerised at pressures from 500 to 4,000 bar.