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  <element name="TermLoanBMember" id="roc_TermLoanBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="TitaniumDioxidePigmentsVentureTermLoansMember" id="roc_TitaniumDioxidePigmentsVentureTermLoansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="ScheduleOfCalculationOfAdjustedEBITDABySegmentTableTextBlock" id="roc_ScheduleOfCalculationOfAdjustedEBITDABySegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="ReportingSegmentsNumber" id="roc_ReportingSegmentsNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="IncomeLossFromOperationsBeforeInterestTaxDepreciationAndAmortizationNet" id="roc_IncomeLossFromOperationsBeforeInterestTaxDepreciationAndAmortizationNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="OrganizationEstablishmentExpenses" id="roc_OrganizationEstablishmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="AcquisitionAndDisposalCosts" id="roc_AcquisitionAndDisposalCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="TitaniumDioxidePigmentsVentureMember" id="roc_TitaniumDioxidePigmentsVentureMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="OtherVenturesMember" id="roc_OtherVenturesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="JointVentureNotVIEOwnershipPercentage" id="roc_JointVentureNotVIEOwnershipPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="MinimumAnnualPaymentUnderEnergyAgreement" id="roc_MinimumAnnualPaymentUnderEnergyAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="ReceivableWithImputedInterestFairValue" id="roc_ReceivableWithImputedInterestFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
  <element name="JointVentureNotClassifiedAsVariableInterestEntityNumber" id="roc_JointVentureNotClassifiedAsVariableInterestEntityNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="CashAndCashEquivalentsMaximumMaturityPeriod" id="roc_CashAndCashEquivalentsMaximumMaturityPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="IncomeTaxExaminationsReasonablyPossibleResolutionDuringNext12MonthsMaximumBenefit" id="roc_IncomeTaxExaminationsReasonablyPossibleResolutionDuringNext12MonthsMaximumBenefit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="IncomeTaxExaminationsReasonablyPossibleResolutionDuringNext12MonthsMaximumCost" id="roc_IncomeTaxExaminationsReasonablyPossibleResolutionDuringNext12MonthsMaximumCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="DefinedBenefitPlansFundedStatusOfPlanPercentage" id="roc_DefinedBenefitPlansFundedStatusOfPlanPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="DefinedBenefitPlanFundedStatusOfPlanPercentageNotSubjectToLegalOrCustomaryRequirements" id="roc_DefinedBenefitPlanFundedStatusOfPlanPercentageNotSubjectToLegalOrCustomaryRequirements" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="DefinedBenefitPlansFundedStatusOfPlanSubjectToFundingRequirements" id="roc_DefinedBenefitPlansFundedStatusOfPlanSubjectToFundingRequirements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
  <element name="DefinedBenefitPlansFundedStatusOfPlanSubjectToFundingRequirementsPercentage" id="roc_DefinedBenefitPlansFundedStatusOfPlanSubjectToFundingRequirementsPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="AccruedExpensesAndOtherCurrentLiabilitiesMember" id="roc_AccruedExpensesAndOtherCurrentLiabilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="PrepaidExpensesAndOtherCurrentAssetsMember" id="roc_PrepaidExpensesAndOtherCurrentAssetsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="VariableInterestEntitiesTextBlock" id="roc_VariableInterestEntitiesTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="NumberOfFacilitiesAffectedByNewRule" id="roc_NumberOfFacilitiesAffectedByNewRule" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="LanxessMatterMember" id="roc_LanxessMatterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="ProductLiabilitiesMember" id="roc_ProductLiabilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="PensionReceivableMatterMember" id="roc_PensionReceivableMatterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="SHECapitalExpendituresMember" id="roc_SHECapitalExpendituresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="RegulatoryDevelopmentsGreenhouseGasesMember" id="roc_RegulatoryDevelopmentsGreenhouseGasesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="EnvironmentalReservesMember" id="roc_EnvironmentalReservesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="SuperfundMember" id="roc_SuperfundMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="ScheduleOfVariableInterestEntitiesAssetsLiabilitiesTableTextBlock" id="roc_ScheduleOfVariableInterestEntitiesAssetsLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <element name="NoncontrollingInterestThresholdOwnershipPercentage" id="roc_NoncontrollingInterestThresholdOwnershipPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="ValuationAllowanceDeferredTaxAssetIncreaseDecreaseReflectedInIncomeTaxExpenseBenefit" id="roc_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseReflectedInIncomeTaxExpenseBenefit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="ValuationAllowanceDeferredTaxAssetIncreaseDecreaseOther" id="roc_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="DerivativeNotionalAmountTerminated" id="roc_DerivativeNotionalAmountTerminated" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="DebtInstrumentRefinancedAmount" id="roc_DebtInstrumentRefinancedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="OtherNonoperatingIncomeExpenses" id="roc_OtherNonoperatingIncomeExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="EnvironmentalExpenseHazardousMaterialsManagement" id="roc_EnvironmentalExpenseHazardousMaterialsManagement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="AccrualForEnvironmentalLossContingenciesGrossForAccrualsQualifyingForDiscounting" id="roc_AccrualForEnvironmentalLossContingenciesGrossForAccrualsQualifyingForDiscounting" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
  <element name="VariableInterestEntityFinancialSupportJointVenturePartnersAmount" id="roc_VariableInterestEntityFinancialSupportJointVenturePartnersAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentPeriodIncreaseDecrease" id="roc_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentPeriodIncreaseDecrease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="ProceedsFromGovernmentGrants" id="roc_ProceedsFromGovernmentGrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="RestructuringReservePeriodExpenseDiscontinuedOperations" id="roc_RestructuringReservePeriodExpenseDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="RestructuringReserveExcludingUnexpiredLeaseUtilizationPeriod" id="roc_RestructuringReserveExcludingUnexpiredLeaseUtilizationPeriod" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="PeriodForSubstantialCompletionOfOngoingRestructuringActivities" id="roc_PeriodForSubstantialCompletionOfOngoingRestructuringActivities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="NumberOfConsecutiveStatements" id="roc_NumberOfConsecutiveStatements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="FinancingFees" id="roc_FinancingFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="DividendDeclaredToMinorityShareholders" id="roc_DividendDeclaredToMinorityShareholders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <element name="KKRMember" id="roc_KKRMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <element name="CapitalExpendituresSHEMatters" id="roc_CapitalExpendituresSHEMatters" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <element name="EnvironmentalContingenciesSuperfundSites" id="roc_EnvironmentalContingenciesSuperfundSites" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
</schema>

