US4378448A — Polyamide graft as hot-melt adhesive, and elastom…

Claim 1

Independent Claim 96 words

A polyamide suitable for use as a hot-melt adhesive, the polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendent graft copolymerized chains derived from at least one graft comonomer selected from the group consisting of aromatic compounds having at least one olefinically unsaturated moiety, lower methacrylate esters, acrylonitrile and methacrylonitrile, the polyamide containing substantially no free graft comonomer.

Claim 2

Dependent Claim 96 words

A polyamide suitable for use as a hot-melt adhesive, the polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendent graft copolymerized chains derived from at least one graft comonomer selected from the group consisting of aromatic compounds having at least one olefinically unsaturated moiety, lower methacrylate esters, acrylonitrile and methacrylonitrile, the polyamide containing substantially no free graft comonomer.

Claim 3

Dependent Claim 31 words

A polyamide as claimed in claim 1, wherein the graft comonomer is styrene, a vinyl pyridine or an analogue of styrene or a vinyl pyridine having one or more alkyl substituents.

Claim 4

Dependent Claim 19 words

A polyamide as claimed in claim 2, wherein the graft comonomer is styrene, α-methyl styrene or a vinyl pyridine.

Claim 5

Dependent Claim 33 words

A polyamide as claimed in claim 1, wherein the graft comonomer is an alkyl methacrylate having an alkyl group of from 1 to 11 carbon atoms which may be linear, branched or cyclic.

Claim 6

Dependent Claim 25 words

A polyamide as claimed in claim 4, wherein the graft comonomer is methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, cyclohexyl methacrylate or 2-ethylhexyl methacrylate.

Claim 7

Dependent Claim 89 words

A polyamide suitable for use as a hot-melt adhesive, the polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendant graft copolymerised chains derived from at least one graft comonomer selected from the group consisting of styrene, substituted styrenes, lower methacrylate esters, acrylonitrile and methacrylonitrile, and containing substantially no free graft comonomer.

Claim 8

Dependent Claim 89 words

A polyamide suitable for use as a hot-melt adhesive, the polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendant graft copolymerised chains derived from at least one graft comonomer selected from the group consisting of styrene, substituted styrenes, lower methacrylate esters, acrylonitrile and methacrylonitrile, and containing substantially no free graft comonomer.

Claim 9

Dependent Claim 32 words

A polyamide as claimed in any one of claims 1 to 6, which is formed at least partly from one or more dimeric fatty acids and/or one or more dimeric fat diamines.

Claim 10

Dependent Claim 24 words

A polyamide as claimed in any one of claims 1 to 6, which contains not more than 0.1% be weight of free graft comonomer.

Claim 11

Dependent Claim 35 words

A polyamide as claimed in any one of claims 1 to 6, which does not contain sufficient free polymer derived from the graft comonomer or comonomers to form a separate phase from the grafted polyamide.

Claim 12

Dependent Claim 32 words

A polyamide as claimed in any one of claims 1 to 6, which contains up to 10% by weight of graft copolymerised chains based on the total weight of the grafted polyamide.

Claim 13

Dependent Claim 116 words

A process for the production of a grafted polyamide which comprises forming free radical sites in an ungrafted polyamide that is suitable for use as a hot-melt adhesive, said polyamide being formed from at least one dicarboxylic acid and at least one polyamine wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and allowing one or more graft comonomers comprising an aromatic compound having at least one olefinically unsaturated moiety, a lower methacrylate ester, acrylonitrile or methacrylonitrile, to polymerise on the free radical sites, and, if necessary, then removing unreacted graft comonomer from the polyamide.

Claim 14

Dependent Claim 116 words

A process for the production of a grafted polyamide which comprises forming free radical sites in an ungrafted polyamide that is suitable for use as a hot-melt adhesive, said polyamide being formed from at least one dicarboxylic acid and at least one polyamine wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and allowing one or more graft comonomers comprising an aromatic compound having at least one olefinically unsaturated moiety, a lower methacrylate ester, acrylonitrile or methacrylonitrile, to polymerise on the free radical sites, and, if necessary, then removing unreacted graft comonomer from the polyamide.

Claim 15

Dependent Claim 26 words

A process as claimed in claim 11, wherein the free radical sites are formed by irradiating the ungrafted polyamide with high energy electrons or gamma radiation.

Claim 16

Dependent Claim 18 words

A process as claimed in claim 12, wherein the ungrafted polyamide is irradiated in the presence of oxygen.

Claim 17

Dependent Claim 26 words

A process as claimed in claim 13, wherein the graft comonomer is incorporated in the ungrafted polyamide only after the free radical sites have been formed.

Claim 18

Dependent Claim 32 words

A process as claimed in any one of claims 12 to 14, wherein the or each graft comonomer is selected from styrene, a substituted styrene, a lower methacrylate ester, acrylonitrile or methacrylonitrile.

Claim 19

Dependent Claim 28 words

An adhesive composition which comprises a polyamide as claimed in claim 1 and an elastomer, at least part of which is compatible with the pendant graft copolymerised chains.

Claim 20

Dependent Claim 34 words

A composition as claimed in claim 16, wherein the part of the elastomer that is compatible with the graft copolymerised chains is derived from the same monomer or monomers as the graft copolymerised chains.

Claim 21

Dependent Claim 14 words

A composition as claimed in claim 16, wherein the elastomer is a thermoplastic elastomer.

Claim 22

Dependent Claim 19 words

A composition as claimed in claim 18, wherein the thermoplastic elastomer comprises a linear or radial A-B-A block copolymer.

Claim 23

Dependent Claim 26 words

A composition as claimed in claim 19, wherein the thermoplastic elastomer contains polystyrene blocks and the graft copolymerised chains of the polyamide are derived from styrene.

Claim 24

Dependent Claim 104 words

A dimensionally heat-recoverable article at least part of which has been coated with a hot-melt adhesive composition comprising a polyamide formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendent graft copolymerized chains derived from at least one graft comonomer selected from the group consisting of aromatic compounds having at least one olefinically unsaturated moiety, lower methacrylate esters, acrylonitrile and methacrylonitrile, the polyamide containing substantially no free graft comonomer.

Claim 25

Dependent Claim 104 words

A dimensionally heat-recoverable article at least part of which has been coated with a hot-melt adhesive composition comprising a polyamide formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendent graft copolymerized chains derived from at least one graft comonomer selected from the group consisting of aromatic compounds having at least one olefinically unsaturated moiety, lower methacrylate esters, acrylonitrile and methacrylonitrile, the polyamide containing substantially no free graft comonomer.

Claim 26

Dependent Claim 31 words

An article as claimed in claim 21, wherein the graft comonomer is styrene, a vinyl pyridine or an analogue of styrene or a vinyl pyridine having one or more alkyl substituents.

Claim 27

Dependent Claim 19 words

An article as claimed in claim 22, wherein the graft comonomer is styrene, α-methyl styrene or a vinyl pyridine.

Claim 28

Dependent Claim 33 words

An article as claimed in claim 21, wherein the graft comonomer is an alkyl methacrylate having an alkyl group of from 1 to 11 carbon atoms which may be linear, branched or cyclic.

Claim 29

Dependent Claim 25 words

An article as claimed in claim 24, wherein the graft comonomer is methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, cyclohexyl methacrylate or 2-ethylhexyl methacrylate.

Claim 30

Dependent Claim 98 words

A dimensionally heat-recoverable article at least part of which has been coated with a hot-melt adhesive composition comprising a polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendant graft copolymerised chains derived from at least one graft comonomer selected from the group consisting of styrene, substituted styrenes, lower methacrylate esters, acrylonitrile and methacrylonitrile, and containing substantially no free graft comonomer.

Claim 31

Dependent Claim 98 words

A dimensionally heat-recoverable article at least part of which has been coated with a hot-melt adhesive composition comprising a polyamide being formed from at least one dicarboxylic acid and at least one polyamine, wherein there is an average of at least fifteen carbon atoms separating the acid or the amine groups of at least one of said dicarboxylic acid or said polyamine, respectively, and containing pendant graft copolymerised chains derived from at least one graft comonomer selected from the group consisting of styrene, substituted styrenes, lower methacrylate esters, acrylonitrile and methacrylonitrile, and containing substantially no free graft comonomer.

Claim 32

Dependent Claim 29 words

An article as claimed in claim 21 or 26, which is formed at least partly from one or more dimeric fatty acids and/or one or more dimeric fat diamines.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-03-28	1986-09-27	1987-03-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-03-28	1990-09-27	1991-03-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-03-28	1994-09-27	1995-03-29	$7700.00	Window Closed / Lapsed

Polyamide graft as hot-melt adhesive, and elastomer blend

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag