US4123423A — Process for the manufacture of plastics containin…

Claim 1

Independent Claim 217 words

A process for the preparation of self cross-linking films from aqueous dispersions comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of: i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer of ethylene oxide units of the formula --CH.sub.2 --CH.sub.2 --O-- and iii. mixtures of i) and ii), and d. contains cross-linking sites selected from the group consisting of: i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures, 2. combining said oligomer in the form of lumps or coarse powders with water to form a storage stable dispersion with the conversion of those potential ionic groups to ionic groups in a known manner which are necessary to assure a stable dispersion before, during or after the combination with water, 3. applying the dispersion to a substrate to form a film and 4. drying and cross-linking the film so formed through the action of heat and/or siccatives.

Claim 2

Dependent Claim 217 words

A process for the preparation of self cross-linking films from aqueous dispersions comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of: i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer of ethylene oxide units of the formula --CH.sub.2 --CH.sub.2 --O-- and iii. mixtures of i) and ii), and d. contains cross-linking sites selected from the group consisting of: i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures, 2. combining said oligomer in the form of lumps or coarse powders with water to form a storage stable dispersion with the conversion of those potential ionic groups to ionic groups in a known manner which are necessary to assure a stable dispersion before, during or after the combination with water, 3. applying the dispersion to a substrate to form a film and 4. drying and cross-linking the film so formed through the action of heat and/or siccatives.

Claim 3

Dependent Claim 110 words

The process of claim 1 wherein 1. the oligomer has a number average molecular weight of between about 700 and 10,000 and contains between about 0.2 and 3 cross-linking sites per 1,000 molecular weight units and at least two sites per molecule of type ii) or iii) and at least one per molecule if a olefinic double bond, 2. the potential ionic groups whose conversion to ionic groups is needed to form a stable dispersion are converted at the same time that the lump or coarse powder form oligomer is combined with the water and 3. the ratio by weight of oligomer to water is between about 65:35 and 5:95.

Claim 4

Dependent Claim 59 words

The process of claim 1, wherein 1. the oligomer contains between about 0.5 and 1.5 olefinic double bonds per 1,000 molecular weight units and at least one double bond per molecule and 2. the cross-linking of the film is enhanced by the addition of between about 0.05 and 5 weight percent of siccatives, based on the weight of oligomer.

Claim 5

Dependent Claim 68 words

The process of claim 1, wherein the oligomer is a polyurethane having a number average molecular weight of between about 700 and 10,000 containing 1. about 4 to 50 milliequivalents of ionic and potential ionic groups, 2. about 0 to 17 weight percent of ethylene oxide units of the formula --CH 2 --CH 2 --O-- and 3. about 0.5 to 1.5 cross-linking sites per 1,000 molecular weight units.

Claim 6

Dependent Claim 50 words

The process of claim 1, wherein the oligomer is a polyurethane having a number average molecular weight of between about 700 and 1,000 containing 1. about 20 to 150 milliequivalents of ionic groups and potential ionic groups and 2. about 0.5 to 1.5 cross-linking sites per 1,000 molcular weight units.

Claim 7

Dependent Claim 58 words

The process of claim 1, wherein 1. the oligomer is a polyurethane having a number average molecular weight of between about 700 and 10,000, 2. the oligomer contains between about 0.5 and 1.5 blocked isocyanate groups per 1,000 molecular weight units and two such groups per molecule and 3. the film is cross-linked by the action of heat.

Claim 8

Dependent Claim 160 words

A process for the production of water dispersable self cross-linking solids comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight of below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer, of ethylene oxide units of the formula --CH 2 --CH 2 --O-- and iii. mixtures of i) and ii), and d. contains about 0.2 to 3 cross-linking sites per 1,000 molecular weight units selected from the group consisting of i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups, and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures and 2. comminuting the oligomer to lumps or coarse powder.

Claim 9

Dependent Claim 160 words

A process for the production of water dispersable self cross-linking solids comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight of below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer, of ethylene oxide units of the formula --CH 2 --CH 2 --O-- and iii. mixtures of i) and ii), and d. contains about 0.2 to 3 cross-linking sites per 1,000 molecular weight units selected from the group consisting of i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups, and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures and 2. comminuting the oligomer to lumps or coarse powder.

Claim 10

Dependent Claim 8 words

The product of the process of claim 7.

Claim 11

Dependent Claim 123 words

A solid oligomeric polyurethane precursor which is free from isocyanate groups which a. contains urethane groups, b. has a number average molecular weight of below about 20,000, c. has a softening point of at least about 40° C., d. contains about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and/or groups capable of conversion to ionic groups, e. contains about 0 to 20% by weight, based on the weight of oligomer of ethylene oxide units and f. contains about 0.2 to 3 cross-linking sites per 1000 molecular weight units selected from the groups consisting of i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups, and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures.

Claim 12

Dependent Claim 123 words

A solid oligomeric polyurethane precursor which is free from isocyanate groups which a. contains urethane groups, b. has a number average molecular weight of below about 20,000, c. has a softening point of at least about 40° C., d. contains about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and/or groups capable of conversion to ionic groups, e. contains about 0 to 20% by weight, based on the weight of oligomer of ethylene oxide units and f. contains about 0.2 to 3 cross-linking sites per 1000 molecular weight units selected from the groups consisting of i. olefinic double bonds reactive with atmospheric oxygen, ii. sulphhydryl groups, and iii. blocked isocyanate groups which liberate free isocyanate groups at elevated temperatures.

Claim 13

Dependent Claim 99 words

The oligomeric polymer precursor of claim 9 which a. contains urethane groups, b. has a number average molecular weight of from about 700 to 10,000, c. has a softening point of at least about 60° C., d. contains 4 to 50 milliequivalents per 100 g of oligomer of ionic groups and/or groups capable of conversion to ionic groups, e. contains about 2 to 17% by weight based on the weight of oligomer of ethylene oxide units, and f. contains about 0.5 to 1.5 cross-linking sites per 1,000 molecular weight units consisting of olefinic double bonds reactive with atmospheric oxygen.

Claim 14

Dependent Claim 127 words

A process for the preparation of self cross-linking films from aqueous dispersions comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of: i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer of ethylene oxide units of the formula --CH.sub.2 --CH.sub.2 --O-- and iii. mixtures of i) and ii), and d. contains cross-linking sites selected from the group consisting of: i. olefinic double bonds reactive with atmospheric oxygen and ii. sulphhydryl groups,

Claim 15

Dependent Claim 127 words

A process for the preparation of self cross-linking films from aqueous dispersions comprising 1. preparing a polyester or polyurethane oligomer which a. has a number average molecular weight below about 20,000, b. has a softening point of at least about 40° C., c. contains hydrophilic groups selected from the group consisting of: i. about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and groups capable of conversion to ionic groups, ii. about 2 to 20 weight percent, based on the weight of oligomer of ethylene oxide units of the formula --CH.sub.2 --CH.sub.2 --O-- and iii. mixtures of i) and ii), and d. contains cross-linking sites selected from the group consisting of: i. olefinic double bonds reactive with atmospheric oxygen and ii. sulphhydryl groups,

Claim 16

Dependent Claim 77 words

combining said oligomer in the form of lumps or coarse powders with water to form a storage stable dispersion with the conversion of those potential ionic groups to ionic groups in a known manner which are necessary to assure a stable dispersion before, during or after the combination with water, 3. applying the dispersion to a substrate to form a film and 4. drying and cross-linking the film so formed through the action of heat and/or siccatives.

Claim 17

Dependent Claim 77 words

combining said oligomer in the form of lumps or coarse powders with water to form a storage stable dispersion with the conversion of those potential ionic groups to ionic groups in a known manner which are necessary to assure a stable dispersion before, during or after the combination with water, 3. applying the dispersion to a substrate to form a film and 4. drying and cross-linking the film so formed through the action of heat and/or siccatives.

Claim 18

Dependent Claim 111 words

A solid oligomeric polyurethane precursor which is free from isocyanate groups which a. contains urethane groups, b. has a number average molecular weight of below about 20,000, c. has a softening point of at least about 40° C., d. contains about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and/or groups capable of conversion to ionic groups, e. contains about 0 to 20% by weight, based on the weight of oligomer of ethylene oxide units and f. contains about 0.2 to 3 cross-linking sites per 1000 molecular weight units selected from the groups consisting of i. olefinic double bonds reactive with atmospheric oxygen and ii. sulphhydryl groups.

Claim 19

Dependent Claim 111 words

A solid oligomeric polyurethane precursor which is free from isocyanate groups which a. contains urethane groups, b. has a number average molecular weight of below about 20,000, c. has a softening point of at least about 40° C., d. contains about 4 to 180 milliequivalents per 100 g of oligomer of ionic groups and/or groups capable of conversion to ionic groups, e. contains about 0 to 20% by weight, based on the weight of oligomer of ethylene oxide units and f. contains about 0.2 to 3 cross-linking sites per 1000 molecular weight units selected from the groups consisting of i. olefinic double bonds reactive with atmospheric oxygen and ii. sulphhydryl groups.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-10-30	1982-05-01	1982-10-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-10-30	1986-05-01	1986-10-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-10-30	1990-05-01	1990-10-31	$7700.00	Window Closed / Lapsed

Process for the manufacture of plastics containing ester and/or urethane groups

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