US4818622A — Process and device for the production of a safety…

Claim 1

Independent Claim 193 words

A process for the production of a compound pane comprising a glass sheet having thereon a transparent polyurethane-based layer having energy-absorbant properties, wherein said polyurethane-based coating layer having energy absorbing properties is formed directly on said glass sheet by the reactive spraying of a reactive mixture of an isocyanate component having a viscosity under 5,000 centipoises at 40° C. and a polyalcohol component, wherein said isocyanate component contains at least one aliphatic or cycloaliphatic diisocyanate or a prepolymer of the isocyanates, and wherein said polyalcohol component contains at least one long difunctional poloyalcohol having a molecular weight of from between 500 and 4000 and at least one short diol having a molecule weight under about 300 as a chain extending agent, (1) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.9, or (2) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanates group equivalents to hydroxyl group equivalent is at least about 0.8 when at least one of said components is trifunctional.

Claim 2

Dependent Claim 193 words

A process for the production of a compound pane comprising a glass sheet having thereon a transparent polyurethane-based layer having energy-absorbant properties, wherein said polyurethane-based coating layer having energy absorbing properties is formed directly on said glass sheet by the reactive spraying of a reactive mixture of an isocyanate component having a viscosity under 5,000 centipoises at 40° C. and a polyalcohol component, wherein said isocyanate component contains at least one aliphatic or cycloaliphatic diisocyanate or a prepolymer of the isocyanates, and wherein said polyalcohol component contains at least one long difunctional poloyalcohol having a molecular weight of from between 500 and 4000 and at least one short diol having a molecule weight under about 300 as a chain extending agent, (1) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.9, or (2) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanates group equivalents to hydroxyl group equivalent is at least about 0.8 when at least one of said components is trifunctional.

Claim 3

Dependent Claim 27 words

Process according to claim 1, wherein the isocyanate component contains carbamide functions, with the carbamide content at most 10% of the total weight of the isocyanate component.

Claim 4

Dependent Claim 13 words

Process of claim 2, wherein the carbamide content is between 5 and 7.

Claim 5

Dependent Claim 11 words

Process according to claim 1, wherein the isocyanate component contains 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate.

Claim 6

Dependent Claim 43 words

Process according to claim 1, wherein the isocyanate component and the polyalcohol component of the polyurethane having energy-absorbent properties are taken in a quantity such that the ratio of the isocyanate equivalent groups to the hydroxyl equivalent groups is about equal to 1.

Claim 7

Dependent Claim 49 words

Process according to claim 1, wherein the proportions between the different polyalcohols are chosen such that the number of hydroxyl equivalent groups due to the short diol represents 20 to 70% of the total of the hydroxyl groups when the ratio of the OH equivalent groups is about 1.

Claim 8

Dependent Claim 38 words

Process according to claim 1, wherein the isocyanate component is formed essentially of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate presenting carbamide groups and in that the polyalcohol component is formed essentially of polytetramethyeneglycol having a molecular mass of about 1000 and of 1,4-butanediol.

Claim 9

Dependent Claim 22 words

Process according to claim 1, wherein the polyalcohol component in addition comprises at least one polyalcohol having a functionality greater than 2.

Claim 10

Dependent Claim 17 words

Process according to claim 7, wherein the polyalcohol having a functionality greater than 2 is a triol.

Claim 11

Dependent Claim 50 words

Process according to claim 1, wherein, for a total hydroxyl, equivalent for the polyalcohol component of the polyurethane having energy absorbent properties, the long polyalcohol represents 0.30 to 0.45 equivalent, the short diol 0.2 to 0.7 equivalent and the polyalcohol having functionality greater than 2 from 0 to 0.35 equivalent.

Claim 12

Dependent Claim 27 words

Process according to claim 1, wherein the polyurethane layer having energy-absorbent properties contains additives including at least one of a catalyst, a layering agent, and a stabilizer.

Claim 13

Dependent Claim 13 words

Process according to claim 1, wherein the spraying is a high-speed centrifuge spraying.

Claim 14

Dependent Claim 25 words

Process according to claim 11, wherein the centrifuge spraying is effected utilizing a bowl turning at a speed between 1000 and 80000 turns per minute.

Claim 15

Dependent Claim 19 words

Process according to claim 11, wherein the mixture of the reactive components is made directly in the spray head.

Claim 16

Dependent Claim 28 words

Process according to claim 1, wherein a coating layer having surface properties, which is self-repairing and scratch-resistant, is formed on the layer having energy-absorbent properties which is produced.

Claim 17

Dependent Claim 17 words

Process according to claim 14, wherein the sprayed reactive mixture forms a polyurethane which can be thermo-hardened.

Claim 18

Dependent Claim 14 words

Process according to claim 14, wherein the reactive spraying is a high-speed centrifuge spraying.

Claim 19

Dependent Claim 189 words

A compound pane comprising a glass sheet having thereon a transparent polyurethane-based layer having energy-absorbent properties, wherein said compound pane is obtained by forming directly said polyurethane-based coating layer having energy absorbent properties onto said glass sheet by the reactive spraying of a reactive mixture of an isocyanate component having a viscosity under 5,000 centipoises at 40° C. and a polyalcohol component, wherein said isocyanate component contains at least one aliphatic or cycloaliphatic diisocyanate or a prepolymer of these isocyanates, and wherein said polyalcohol component contains at least one long difunctional polyalcohol having a molecular weight of between 500 and 4000 and at least one short diol having a molecule weight under about 3 as a chain extending agent, (1) wherein said isocyanate component and said polyalcohol component are used in an amount such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.9, or (2) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.8 when one of said components is trifunctional.

Claim 20

Dependent Claim 189 words

A compound pane comprising a glass sheet having thereon a transparent polyurethane-based layer having energy-absorbent properties, wherein said compound pane is obtained by forming directly said polyurethane-based coating layer having energy absorbent properties onto said glass sheet by the reactive spraying of a reactive mixture of an isocyanate component having a viscosity under 5,000 centipoises at 40° C. and a polyalcohol component, wherein said isocyanate component contains at least one aliphatic or cycloaliphatic diisocyanate or a prepolymer of these isocyanates, and wherein said polyalcohol component contains at least one long difunctional polyalcohol having a molecular weight of between 500 and 4000 and at least one short diol having a molecule weight under about 3 as a chain extending agent, (1) wherein said isocyanate component and said polyalcohol component are used in an amount such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.9, or (2) wherein said isocyanate component and said polyalcohol component are used in a quantity such that the ratio of isocyanate group equivalents to hydroxyl group equivalents is at least about 0.8 when one of said components is trifunctional.

Claim 21

Dependent Claim 14 words

The process of claim 1, wherein said compound pane obtained is a vehicle windshield.

Claim 22

Dependent Claim 14 words

The compound pane of claim 18, wherein said compound pane is a vehicle windshield.

Claim 23

Dependent Claim 28 words

The compound pane of claim 18, wherein the isocyanate component contains carbamide functions, with the carbamide content at most 10% of the total weight of the isocyanate component.

Claim 24

Dependent Claim 15 words

The compound pane of claim 21, where the carbamide content is between 5 and 7.

Claim 25

Dependent Claim 12 words

The compound pane of claim 18, wherein the isaocyanate component contains 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate.

Claim 26

Dependent Claim 44 words

The compound pane of claim 18, wherein the isocyanate component and the polyalcohol component of the polyurethane having energy-absorbent properties are taken in a quantity such that the ratio of the isocyanate equivalvent groups to the hydroxyl equivalent groups is about equal to 1.

Claim 27

Dependent Claim 50 words

The compound pane of claim 18, wherein the proportions between the different polyalcohols are chosen such that the number of hydroxyl equivalent groups due to the short diol represents 20 to 70% of the total of the hydroxyl groups when the ratio of the OH equivalent groups is about 1.

Claim 28

Dependent Claim 39 words

The compound pane of claim 18, wherein the isocyanate component is formed essentially of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate presenting carbamide groups and in that the polyalcohol component is formed essentially of polytetramethyleneglycol having a molecular mass of about 1000 and of 1,4-butanediol.

Claim 29

Dependent Claim 23 words

The compound pane of claim 18, wherein the polyalcohol component in addition comprises at least one polyalcohol having a functionality greater than 2.

Claim 30

Dependent Claim 18 words

The compound pane of claim 26, wherein the polyalcohol having a functionality greater than 2 is a triol.

Claim 31

Dependent Claim 51 words

The compound pane of claim 18, wherein, for a total hydroxyl equivalent for the polyalcohol component of the polyurethane having energy absorbent properties, the long polyalcohol represents 0.30 to 0.45 equivalent, the short diol 0.2 to 0.7 equivalent and the polyalcohol having functionality greater than 2 from 0 to 0.35 equivalent.

Claim 32

Dependent Claim 28 words

The compound pane of claim 18, wherein the polyurethane layer having energy-absorbent properties contains additives including at least one of a catalyst, a layering agent, and a stabilizer.

Claim 33

Dependent Claim 14 words

The compound pane of claim 18, wherein the spraying is a high-speed centrifuge spraying.

Claim 34

Dependent Claim 26 words

The compound pane of claim 30, wherein the centrifuge spraying is effected utilizing a bowl turning at a speed between 1000 and 80000 turns per minute.

Claim 35

Dependent Claim 20 words

The compound pane of claim 30, wherein the mixture of the reactive components is made directly in the spray head.

Claim 36

Dependent Claim 29 words

The compound pane of claim 18, wherein a coating layer having surface properties, which is self-repairing and scratch-resistant, is formed on the layer having energy-absorbent properties which is produced.

Claim 37

Dependent Claim 18 words

The compound pane of claim 33, wherein the sprayed reactive mixture forms a polyurethane which can be thermo-hardened.

Claim 38

Dependent Claim 15 words

The compound pane of claim 33, wherein the reactive spraying is a high-speed centrifuge spraying.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-04-03	1992-10-03	1993-04-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-04-03	1996-10-03	1997-04-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-04-03	2000-10-03	2001-04-04	$7700.00	Window Closed / Lapsed

Process and device for the production of a safety pane

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