Process utilizing release agent

Claim 2

In a process wherein separation of two adhering surfaces is facilitated by application of a release agent to at least one of the surfaces, the improvement comprising applying to at least one of said surfaces an aqueous solution of a release agent which is a sulfosuccinate salt of an addition product of an organic substituted lower alkylene oxide with an organic acid, alcohol or amide.

Claim 3

In a process for forming a plastic article wherein a liquid composition from which said article is formed is applied to a glass, metal or plastic surface and congealed into solid form while on said surface, and wherein a release agent is applied to said surface to reduce the tendency of said article to adhere to said surface, the improvement comprising applying to said surface a release agent of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 represents an alkyl group having about 8 to about 18 carbon atoms or an alkaryl group having about 6 to about 12 carbon atoms in the side chain; X represents O--, CO--O--, or CO-NH, n represents an integer within the range of 1 to about 100; and R 2 represents CO-CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM in which event n is at least 25; and wherein M represents an alkali metal.

Claim 4

In a process for forming a plastic article wherein a liquid composition from which said article is formed is applied to a glass, metal or plastic surface and congealed into solid form while on said surface, and wherein a release agent is applied to said surface to reduce the tendency of said article to adhere to said surface, the improvement comprising applying to said surface a release agent of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 represents an alkyl group having about 8 to about 18 carbon atoms or an alkaryl group having about 6 to about 12 carbon atoms in the side chain; X represents O--, CO--O--, or CO-NH, n represents an integer within the range of 1 to about 100; and R 2 represents CO-CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM in which event n is at least 25; and wherein M represents an alkali metal.

Claim 5

A process according to claim 2 wherein said surface is glass and said article comprises a polyester resin.

Claim 6

A process according to claim 2 wherein said surface is glass and said article comprises a silicone resin.

Claim 7

A process according to claim 2 wherein said surface is poly(methyl methacrylate) and said article comprises an epoxy resin.

Claim 8

A process according to claim 2 wherein said surface is steel and said article comprises a polyurethane resin.

Claim 9

In a process for the manufacture of a transparent highly optical, solid plastic material wherein a liquid composition is applied to a flat smooth support having thereon a release agent, and wherein said liquid composition congeals on said support to form said solid plastic material, the improvement comprising utilizing as the sole release agent a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO-O, or CO-NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO-CH(SO 3 M)--CH 2 COOM, or CO-C 6 H 4 -COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal.

Claim 10

In a process for the manufacture of a transparent highly optical, solid plastic material wherein a liquid composition is applied to a flat smooth support having thereon a release agent, and wherein said liquid composition congeals on said support to form said solid plastic material, the improvement comprising utilizing as the sole release agent a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO-O, or CO-NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO-CH(SO 3 M)--CH 2 COOM, or CO-C 6 H 4 -COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal.

Claim 11

A continuous process for the manufacture of a transparent, self-healing, anti-lacerative, thermoset polyurethane sheet of indefinite length comprising: (A) depositing a release agent on a moving support comprising a series of clean, smooth, flat glass plates by applying thereto an aqueous solution of the release agent; (B) thereafter applying to said moving support a liquid mixture of reactants which are polymerized on said support to form said polyurethane sheet; (C) removing said sheet from said support; (D) cleaning said support with an aqueous wash, including removing residue release agent, if any, from said support; and (E) re-using said support to make additional polyurethane sheet by subjecting it to steps (A) to (D); wherein said release agent is a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO-O, or CO-NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal.

Claim 12

A continuous process for the manufacture of a transparent, self-healing, anti-lacerative, thermoset polyurethane sheet of indefinite length comprising: (A) depositing a release agent on a moving support comprising a series of clean, smooth, flat glass plates by applying thereto an aqueous solution of the release agent; (B) thereafter applying to said moving support a liquid mixture of reactants which are polymerized on said support to form said polyurethane sheet; (C) removing said sheet from said support; (D) cleaning said support with an aqueous wash, including removing residue release agent, if any, from said support; and (E) re-using said support to make additional polyurethane sheet by subjecting it to steps (A) to (D); wherein said release agent is a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO-O, or CO-NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal.

Claim 13

A process according to claim 8 wherein said polyurethane is formed from a mixture of reactants comprising: (1) a polyglycol ether resulting from the condensation of propylene oxide with trimethylolpropane and containing about 10.5 to about 12% by weight free hydroxyls and (2) a biuret of 1,6-hexamethylene diisocyanate having about 21-22% by weight isocyanate groups, wherein the weight of said biuret is between about 0.9 and 1.1 times the weight of said polyglycol ether.

Claim 14

A process according to any of the preceding claims wherein the release agent comprises disodium dodecylpolyethylene-ether-sulfosuccinate having an average of 3 to 4 ethoxy groups per molecule.

Claim 15

A process according to any of claims 1 to 9 wherein the release agent comprises disodium nonylphenyl polyethylene-ether sulfosuccinate containing about 50 ethoxy groups per molecule.

Claim 16

A process according to claims 2, 7, 8 or 9 wherein the release agent comprises disodium-decyl-polyethylene-ether phosphate containing about 20 ethoxy groups per molecule.

Claim 17

A process according to any one of claims 2 to 9, wherein the release agent comprises sodium octadecylpolyethylene-ether-phthalate containing about 25 ethoxy groups per molecule.

Claim 18

A process according to any one of claims 1 to 9 wherein the amount to release agent present on the support or surface is about 0.1 to about 2.5 g/m 2 .

Claim 19

A process according to any one of claims 2 to 9 wherein the release agent is applied to the support or surface in the form of an aqueous solution containing about 0.1 to about 1% by weight of release agent.

Claim 20

A process according to claim 2 or 7 including heating the liquid composition to congeal it.

Claim 21

An article comprising two surfaces adhered to each other, and sandwiched between said surfaces to facilitate separation thereof a release agent of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO--O, or CO--NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal; one of the surfaces being glass.

Claim 22

An article comprising two surfaces adhered to each other, and sandwiched between said surfaces to facilitate separation thereof a release agent of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 --X represents a fatty acid, fatty acid amide or fatty acid alcohol group; or R 1 represents an alkaryl group having about 6 to about 12 carbon atoms in the side chain and X represents O-, CO--O, or CO--NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM; provided that when R 2 is CO--C 6 H 4 --COOM, then n is at least 25; and wherein M represents an alkali metal; one of the surfaces being glass.

Claim 23

An article according to claim 17 wherein the force of adhesion of said adhering surfaces is no greater than about 0.6 kg/cm of width of the surfaces.

Claim 24

An article according to claim 17 or 18 wherein one of said surfaces is silicate glass and the other surface is a thermoset polyurethane having optical, self-healing and anti-lacerative properties.

Claim 25

In a process wherein separation of two adhering surfaces is facilitated by application of a release agent to at least one of the surfaces, the improvement comprising applying to at least one of said surfaces an aqueous solution of a release agent which is a phthalate salt of an addition product of an organic substituted lower poly(alkylene oxide) containing at least 25 alkylene oxide groups.

Claim 26

In a process wherein separation of two adhering surfaces is facilitated by application of a release agent to at least one of the surfaces, the improvement comprising applying to at least one of said surfaces an aqueous solution of a release agent which is a phthalate salt of an addition product of an organic substituted lower poly(alkylene oxide) containing at least 25 alkylene oxide groups.

Claim 27

A process for the manufacture of a highly optical thermoset polyurethane sheet comprising: (A) depositing a release agent on a smooth, flat support by applying thereto an aqueous solution of the release agent; (B) thereafter applying to said support a liquid mixture of reactants which are polymerized on said support to form said polyurethane sheet; and (C) removing said sheet from said support; wherein said release agent is a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 represents an alkyl group having about 8 to about 18 carbon atoms or an alkaryl group having about 6 to about 12 carbon atoms in the side chain; X represents O--, CO--O--, or CO--NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , or, CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM, in which event, n is at least 25; and wherein M represents an alkali metal.

Claim 28

A process for the manufacture of a highly optical thermoset polyurethane sheet comprising: (A) depositing a release agent on a smooth, flat support by applying thereto an aqueous solution of the release agent; (B) thereafter applying to said support a liquid mixture of reactants which are polymerized on said support to form said polyurethane sheet; and (C) removing said sheet from said support; wherein said release agent is a compound of the formula R.sub.1 --X(C.sub.2 H.sub.4 O).sub.n --R.sub.2 wherein: R 1 represents an alkyl group having about 8 to about 18 carbon atoms or an alkaryl group having about 6 to about 12 carbon atoms in the side chain; X represents O--, CO--O--, or CO--NH; n represents an integer within the range of 1 to about 100; and R 2 represents PO 3 M 2 , or, CO--CH(SO 3 M)--CH 2 COOM, or CO--C 6 H 4 --COOM, in which event, n is at least 25; and wherein M represents an alkali metal.