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

• US 6,720,398 B2
• Filed: 08/15/2001
• Issued: 04/13/2004
• Est. Priority Date: 08/15/2000
• Status: Expired due to Fees

• Current Assignee: Akzo Nobel N.V. (Nouryon BV)
• Original Assignee: Akzo Nobel N.V. (Nouryon BV)
• Inventors: Hogt, Andreas H., Meijer, John
• Primary Examiner(s): Zalukaeva, Tatyana
• Application Number:
  US09/930,403
• Publication Number:
  US 20020052455A1
• Time in Patent Office: 972 Days
• Field of Search: 526/89, 526/227, 526/232.3, 526/232.5, 526/317.1, 526/318, 526/318.1, 526/318.44, 526/319, 526/329.2, 526/352, 526/352.2
• US Class Current: 526/232.5
• CPC Class Codes: C08F 4/34 Per-compounds with one peroxy-radical

Abstract

The invention relates to a polymerization 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 R² 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 trioxepane compounds of formula I

with R^1-3 being independently selected from hydrogen and substituted or unsubstituted hydrocarbyl groups, while two of the groups R^1-3 optionally are linked to form a ring structure.

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 optionally are connected to form a cycloalkyl ring;

the optional one or more substituents on each of R¹-R³ 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 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

wherein R⁴ is independently selected from any of the group of compounds given for R^1-3 in any one of claims 1 or 2, or R¹ and R² are linked to form a substituted or unsubstituted cycloalkyl ring.

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.

7. A process according to claim 2 wherein R¹ and R³ are selected from methyl, ethyl, and isopropyl.