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US 4,287,322 AGranted
Epichlorohydrin elastomer compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorAllan T. Worm
Life of this patent
Estimating the term…
Abstract
A gum stock composition comprising polyepichlorohydrin gum, polyphenol, organo-onium compound, and acid acceptor is shaped and cured to form shaped elastomeric articles.
Claims26
A polyepichlorohydrin gum stock composition, comprising:
- (a) polyepichlorohydrin gum;
- (b) polyphenol curing agent;
- (c) organo-onium cocuring agent selected from compounds of the formulas
- (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m
- (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m
- wherein Q is a nitrogen, arsenic or phosphorus atom;
- X is an anion of valence m;
- each R.sup.1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.1, and can combine with another R.sup.1 to form a cyclic structure containing a Q atom;
- and R.sup.2 is a divalent organic radical containing 2 to 12 carbon atoms;
- (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m
- or
- (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m
- wherein S is sulfur;
- X is an anion of valence m;
- each R.sup.3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.3, and can combine with another R.sup.3 to form a cyclic structure containing an S atom;
- R.sup.4 is a divalent organic radical containing 2 to 12 carbon atoms;
- and at least one R.sup.3 or R.sup.4 group is aromatic;
- which composition in reactive association with an acid acceptor will, upon exposure to heat, cure into an elastomer.
15 more elements
A curable polyepichlorohydrin gum stock composition comprising:
- (a) polyepichlorohydrin gum;
- (b) polyphenol curing agent;
- (c) organo-onium cocuring agent selected from compounds of the formulas
- (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m
- (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m
- wherein Q is a nitrogen, arsenic or phosphorus atom;
- X is an anion of valence m;
- each R.sup.1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.1, and can combine with another R.sup.1 to form a cyclic structure containing a Q atom;
- and R.sup.2 is a divalent organic radical containing 2 to 12 carbon atoms;
- (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m
- (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m
- wherein S is sulfur;
- X is an anion of valence m;
- each R.sup.3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.3, and can combine with another R.sup.3 to form a cyclic structure containing an S atom;
- R.sup.4 is a divalent organic radical containing 2 to 12 carbon atoms;
- and at least one R.sup.3 or R.sup.4 group is aromatic;
- and
- (d) an acid acceptor.
15 more elements
A composition comprising:
- (a) polyepichlorohydrin gum;
- (b) polyphenol curing agent;
- and
- (c) organo-onium cocuring agent selected from compounds of the formulas
- (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m
- (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m
- wherein Q is a nitrogen, arsenic or phosphorus atom;
- X is an anion of valence m;
- each R.sup.1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.1, and can combine with another R.sup.1 to form a cyclic structure containing a Q atom;
- and R.sup.2 is a divalent organic radical containing 2 to 12 carbon atoms;
- (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m
- or
- (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m
- wherein S is sulfur;
- X is an anion of valence m;
- each R.sup.3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.3, and can combine with another R.sup.3 to form a cyclic structure containing an S atom;
- R.sup.4 is a divalent organic radical containing 2 to 12 carbon atoms;
- and at least one R.sup.3 or R.sup.4 group is aromatic;
- said composition containing, per 100 parts of said polyepichlorohydrin gum, from about 100 to 900 parts of said curing agent, and from about 100 to 900 parts of said cocuring agent.
16 more elements
A masterbatch useful in making curable polyepichlorohydrin gumstock, said masterbatch comprising a combination of 100 parts by weight of a polyepichlorohydrin gum as the carrier of said masterbatch and 100-900 parts by weight of a polyphenol as a curing agent for said polyepichlorohydrin gumstock.
A composition comprising:
- (a) polyepichlorohydrin gum;
- and
- (b) organo-onium cocuring agent selected from compounds of the formulas
- (R.sup.1).sub.4 Q.sup.+1 (S.sup.-m).sub.1/m
- (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m
- wherein Q is a nitrogen, arsenic or phosphorus atom;
- X is an anion of valence m;
- each R.sup.1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.1, and can combine with another R.sup.1 to form a cyclic structure containing a Q atom;
- and R.sup.2 is a divalent organic radical containing 2 to 12 carbon atoms;
- (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m
- or
- (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m
- wherein S is sulfur;
- X is an anion of valence m;
- each R.sup.3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.3, and can combine with another R.sup.3 to form a cyclic structure containing an S atom;
- R.sup.4 is a divalent organic radical containing 2 to 12 carbon atoms;
- and at least one R.sup.3 or R.sup.4 group is aromatic;
- said composition containing 100 to 900 parts of said cocuring agent per 100 parts of said gum.
15 more elements
A method for curing a polyepichlorohydrin gum, comprising the steps of:
- (a) admixing therewith, per one hundred grams of said polyepichlorohydrin gum, from about 0.3 to 15 millimoles of polyphenol curing agent;
- from about 0.2 to 7.5 millimoles of organo-onium cocuring agent selected from compounds of the formulas
- (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m
- (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m
- wherein Q is a nitrogen, arsenic or phosphorus atom;
- X is an anion of valence m;
- each R.sup.1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.1, and can combine with another R.sup.1 to form a cyclic structure containing a Q atom;
- and R.sup.2 is a divalent organic radical containing 2 to 12 carbon atoms;
- (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m
- or
- (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m
- wherein S is sulfur;
- X is an anion of valence m;
- each R.sup.3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R.sup.3, and can combine with another R.sup.3 to form a cyclic structure containing an S atom;
- R.sup.4 is a divalent organic radical containing 2 to 12 carbon atoms;
- and at least one R.sup.3 or R.sup.4 group is aromatic;
- and from about 0.5 to 40 grams of an acid acceptor;
- (b) shaping said admixture by molding or extruding;
- and
- (c) subjecting said shaped admixture to sufficient heat and pressure to form a vulcanized shaped article.
17 more elements
Dependencies are inferred from the claim text.