Title:
IONOMER HAVING IMPROVED LOW TEMPERATURE BEND-CRACKING RESISTANCE AND MANUFACTURE
Document Type and Number:
Japanese Patent JPS60155206
Kind Code:
A
Abstract:
Improved low temperature flex-crack resistant ionic copolymers of ethylene, unsaturated carboxylic acid and at least one softening comonomer that is capable of forming a homopolymer having a glass transition temperature of less than -40 DEG C, such as alkyl acrylates and/or alkyl vinyl ethers and from about 0.5 to about 6.0 mole % of chain branches arising from the polymerization of ethylene, are obtained by direct or graft copolymerization, followed by neutralization of the carboxylic acid groups with metal ions, such ionic copolymers of ethylene being characterized by having from about 5 to about 20 chain branches arising from the polymerization of ethylene/1000 CH2 units of the polymer backbone, said ethylene chain branches being composed of butyl or longer branches, the copolymer being further characterized by satisfying the equation A + 2.05 B = C, wherein A is the mole percent of softening comonomer, B is the mole percent of butyl or longer chain branches derived from the polymerization of ethylene, and C is from about 1.5 to about 24.3.
Inventors:
ROBAATO FUIRITSUPU SORUTOMAN
Application Number:
JP26650384A
Publication Date:
August 15, 1985
Filing Date:
December 19, 1984
Export Citation:
Assignee:
DU PONT
International Classes:
C08L23/26; A43B5/04; A63B37/00; A63B37/12; C08F8/00; C08F8/44; C08F255/00; C08F255/02; C08L7/00; C08L21/00; C08L23/00; C08L33/00; C08L33/02; C08L77/00; C08L101/00; (IPC1-7): A43B5/04; A63B37/12; C08F8/44; C08F255/02; C08L23/26
Attorney, Agent or Firm:
Heiyoshi Odashima