Ethylene/acrylate ester copolymers

• US 3,350,372 A
• Filed: 01/06/1964
• Issued: 10/31/1967
• Est. Priority Date: 08/22/1960
• Status: Expired due to Term

• Current Assignee: George E. Ham, Harry D. Anspon, William H. Byler
• Original Assignee: George E. Ham, Harry D. Anspon, William H. Byler
• Inventors: Anspon, Harry D., Byler, William H., Ham, George E.
• Application Number:
  US04/335,732
• Time in Patent Office: 1,394 Days
• US Class Current: 526/329
• CPC Class Codes: C08F 10/00 Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 20/12 of monohydric alcohols or phenols
• CPC Class Codes: C08F 220/12 of monohydric alcohols or phenols
• CPC Class Codes: C08F 4/28 Oxygen or compounds releasing free oxygen redox systems C08F4/40
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08L 23/0853 Vinylacetate

Claims

1. A HIGHLY UNIFORM COPOLYMER HAVING POLYMERIZED THEREIN ABOUT 67-99 MOL PERCENT ETHYLENE AND, CORRESPONDINGLY, ABOUT 33-1 MOL PERCENT OF AN ACRYLATE ESTER, SAID POLYMERIZED ETHYLENE GROUPS AND JPOLYMERIZED ACRYLATE ESTER GROUPS BEING RANDOMLY DISTRIBUTED THROUGHOUT THE COPOLYMER CHAINS, SAID KCOPOLYMER, WHEN SEPARATED INTO TEN PERCENT WEIGHT FRACTIONS BY A COLUMN ELUTION TECHNIQUE EMPLOYING A VARIABLE P-XYLENE-2-ETHOXYETHANOL ELUANT, HAVING NO TEN PERCENT WEIGHT FRACTION WHICH DIFFERS IN POLYMERIZED ACRYLATE ESTER CONTENT BY MORE THAN ABOUT 40% FROM THE POLYMERIZED ACRYLATE ESTER CONTENT OF THE WHOLE COPOLYMER, SAID COPOLYMER HAVING A 50% SURVIVAL RATE FOR AT LEAST 24 HOURS IN THE BENT-STRIP ENVIRONMENTAL STRESS-CRACK TEST (ASTM-D-1693-60T), SAID ACRYLATE ESTER CONFORMING TO THE FORMULA: